81 results about "Ammonia adsorption" patented technology

To provide an artificial intelligence-based ammonia adsorption tower driving control device and a control method using the same, capable of contributing to environmental friendliness and producing clean energy by executing an abnormal situation processing process when an abnormal state occurs.SOLUTION: A control device 100 includes: a sensor unit 110 configured to measure an internal state of an adsorption tower; a memory configured to store one or more instructions; a processor configured to execute the one or more instructions stored in the memory; and a driving unit configured to drive the adsorption tower according to an adsorption cycle and a desorption cycle set on the basis of the internal state of the adsorption tower. Therein the processor is configured to: output an adsorption cycle and desorption cycle according to sensing data of the sensor unit using a trained artificial intelligence model; when the sensing data is within a preset optimal range, transmit a command to drive the adsorption tower according to the output adsorption cycle and desorption cycle to the driving unit; and if the sensing data exceeds the optimal range, transmit a command to execute an abnormal situation processing process according to a preset exception adsorption cycle and exception desorption cycle to the driving unit.SELECTED DRAWING: Figure 2

The utility model discloses a flue gas denitration system, ammonia gas generation and injection unit and ammonia adsorption-desorption-reuse system, ammonia gas generation and injection unit is connected to the high temperature section of boiler, ammonia adsorption-desorption-reuse system is connected between desulfurization tower and chimney. The ammonia gas generation and injection system injects excessive ammonia gas into high-temperature flue gas, nitrogen oxide is reduced into nitrogen and water, the ultralow emission requirement is met, unreacted ammonia gas is adsorbed and purified through the escaping ammonia adsorption-desorption-recovery system at the tail end and recovered to the ammonia gas injection system for reuse, and it is guaranteed that chimney emission is safe and environmentally friendly. Based on the SNCR system, ultralow emission of nitrogen oxide and closed-loop operation of a reducing agent are realized, one-time investment and operation cost is low, the problem of conventional ammonia escape pollution is solved, and the system is economical and environment-friendly.

An ammonia adsorption tower operating control device according to the present disclosure includes: a sensor unit configured to measure an internal state of an adsorption tower; a memory configured to store one or more instructions; a processor configured to execute one or more instructions stored in the memory; and a operating unit configured to operate the adsorption tower according to an adsorption cycle and a desorption cycle set based on the internal state of the adsorption tower. The processor is configured to output corresponding adsorption cycle and desorption cycle according to sensing data of the sensor unit using a trained artificial intelligence model. When the sensing data is within a preset optimal range, transmit a command to operate the adsorption tower according to the output adsorption cycle and desorption cycle to the operating unit.

The invention discloses a jacketed cylinder type hydrogen storage reactor coupled with activated carbon and amino adsorption heat storage, which comprises a protective shell and a hydrogen storage body located in the protective shell, the hydrogen storage body is sleeved with a heat storage body, a metal wall is arranged between the heat storage body and the hydrogen storage body, a winding pipe is spirally wound on the outer wall of the heat storage body, and the outer wall of the winding pipe is sleeved with a metal sleeve. One end of the winding pipe is of a sealed structure, and the other end of the winding pipe penetrates through the protective shell; ammonia inlets and outlets are equidistantly formed in the contact part of the winding pipe and the outer wall of the heat storage body. The high hydrogen storage density can be achieved through the activated carbon, heat released by absorbing hydrogen can also be used for outer layer ammonia adsorption heat storage, the whole reactor only consumes energy in the ammonia gas conveying part, energy loss is reduced, the stability of the device is improved, and the low-energy-consumption operation mode is achieved. Activated carbon and amino adsorption energy storage are coupled, the heat transfer effect is enhanced, continuous hydrogen adsorption and desorption processes can be realized by charging and discharging ammonia gas and released energy, and the system is more flexible.

The invention relates to the technical field of preparation of carbon dioxide adsorbents, and discloses a carbon dioxide solid adsorbent and a preparation method and application thereof, the carbon dioxide solid adsorbent comprises 10-15 parts of aminated montmorillonite, 5-8 parts of modified chitosan, 20-25 parts of desulfurized gypsum, 3-5 parts of a composite water-retaining agent, 1-2 parts of a functional buffer agent and 0.5-1 part of an ammonia adsorption accelerant. According to the invention, the aminated montmorillonite is adopted to replace traditional streptomycin, so that the raw material cost is reduced, and the risk of antibiotic residue is thoroughly eliminated; chitosan is modified through graphene quantum dots, the excellent oxidation resistance of the graphene quantum dots is utilized, an antioxidant does not need to be additionally added, the environment burden is reduced while the preparation process is simplified, and the degradation rate of the adsorbent in the natural environment is increased. All the components in the adsorbent have a synergistic effect, the aminated montmorillonite provides abundant adsorption active sites, the modified chitosan enhances the mechanical strength and stability of the adsorbent, the composite water-retaining agent and the buffer agent guarantee the stability of an adsorption environment, and the ammonia adsorption accelerant accelerates CO2 adsorption kinetics.

The present invention provides an ammonia decomposition hydrogen production system, which relates to the technical field of hydrogen production. The ammonia decomposition hydrogen production system includes: a liquid ammonia storage unit, a primary preheating unit, a secondary preheating unit, an ammonia decomposition unit, an ammonia adsorption unit, a hydrogen purification unit, and a hydrogen storage unit; the liquid ammonia storage unit provides liquid ammonia for the primary preheating unit, the secondary preheating unit is respectively connected to the ammonia decomposition unit and the ammonia adsorption unit, and the gas distribution area of the secondary preheating unit is connected to an air pipeline; the gas in the ammonia decomposition unit is transported into the primary preheating unit and then introduced into the ammonia adsorption unit; the outlet of the ammonia adsorption unit is respectively connected to the secondary preheating unit and the hydrogen purification unit; the hydrogen outlet of the hydrogen purification unit is connected to the hydrogen storage unit, and the waste gas outlet is connected to the secondary preheating unit. The present invention uses electric heating and self-heating to achieve the vaporization and heating of liquid ammonia, and uses ammonia gas and the recycled hydrogen gas to provide part of the heat for ammonia decomposition, thereby improving the heat conversion rate of the entire system.

The application provides a preparation method of a zeolite adsorbent, comprising the following steps: a) treating a zeolite in an oxalic acid solution, and drying to obtain a zeolite precursor; b) treating the zeolite precursor obtained in the step a) in an ammonium fluoride solution, and drying to obtain a zeolite adsorbent. The application also provides a zeolite adsorbent and an ammonia adsorption method. The preparation method provided by the application is mild and controllable in structure adjustment, and the zeolite is post-treated to make the zeolite framework selectively rearrange or slightly adjust in local areas, so that mesoporous channels with appropriate sizes and good connectivity are generated. The preparation method provided by the application can introduce mesopores while maintaining the integrity of the microporous framework structure as much as possible, avoids damage to the micropores or collapse of the framework, and has the characteristics of simple process route, wide range of control parameters, good repeatability and suitability for large-scale preparation.

An engine device is an engine device comprising an engine which is operated by a fuel containing at least ammonia, and comprises: an exhaust passage through which the exhaust gas exhausted from the engine is flowed in the exhaust direction; a selective reduction catalyst which is provided in the exhaust passage and reduces nitrogen oxides contained in the exhaust gas by a reducing agent; an ammonia adsorption catalyst which is provided in the exhaust passage on the upper stream side than the selective reduction catalyst in the exhaust direction, and adsorbs ammonia contained in the exhaust gas; a first bypass passage which is connected to the exhaust passage to bypass the ammonia adsorption catalyst; and a first path switch valve which is provided on the upper stream side than the ammonia adsorption catalyst in the exhaust direction and switches whether the flow of the exhaust gas is passed through the ammonia adsorption catalyst or not.

The invention provides an engine device which can realize miniaturization of the device and can maintain good exhaust gas properties and suppress the usage amount of a reducing agent to purify exhaust gas. An engine device (1) is provided with an engine (2) that operates using a fuel containing at least ammonia, and is provided with: an exhaust passage (4) through which exhaust gas discharged from the engine flows in the exhaust direction; a selective reduction catalyst (6) that is provided in the exhaust passage and that reduces nitrogen oxides contained in the exhaust gas by means of a reducing agent; an ammonia adsorption catalyst (7) that is provided in the exhaust passage upstream of the selective reduction catalyst in the exhaust direction and adsorbs ammonia contained in the exhaust gas; a first bypass passage (8) connected to the exhaust passage so as to bypass the ammonia adsorption catalyst; and a first path switching valve (9) that is provided upstream of the ammonia adsorption catalyst in the exhaust direction and that switches whether or not to circulate the exhaust gas via the ammonia adsorption catalyst.

The invention discloses a preparation method of functionalized UiO-66 for ammonia adsorption, belonging to the field of adsorption and purification of toxic and harmful gases. By introducing a small amount of lower alcohols and monocarboxylic acid ligands into the precursor for ultra-fine regulation, the synergistic effect of the two can effectively stabilize the precursor, regulate the balance between the nucleation and growth of MOFs, and make the material have higher crystallinity and more stable products. On this basis, after eluting the unstable ligands with acid, while increasing the porosity and specific surface area of the material, the original ultra-microporous structure (0.6 nm) is maintained, which hinders the adsorption of larger gases such as N2 and CO2, and exhibits excellent adsorption selectivity for NH3. The functionalized UiO-66 material prepared by this invention not only has a large specific surface area and high ammonia adsorption performance, but also has a simple preparation process, stable products, good crystallinity, and is easy to industrialize.

An embodiment of the present disclosure provides a production apparatus for high purity hydrogen, the production apparatus including: a decomposition reaction unit configured to decompose ammonia through ammonia decomposition reaction and discharge reaction products including hydrogen and nitrogen produced from the ammonia decomposition reaction and non-reacting ammonia; an adsorption refinement unit configured to discharge intermediate refined products by separating or removing ammonia from the reaction products; and a hydrogen separation membrane configured to discharge a high-purity hydrogen product by refining high-purity hydrogen by separating and filtering the intermediate refined products.

The invention discloses a skid-mounted comprehensive treatment platform for liquid ammonia filling and ammonia gas recovery of a ship. The platform comprises a liquid ammonia filling pry, an ammonia refrigeration pry, an ammonia gas recovery pry and a liquid ammonia tank car, wherein the liquid ammonia filling pry comprises a first liquid ammonia filling module, a second liquid ammonia filling module and a control module; the first liquid ammonia filling module is composed of a first pressure reducing valve, an ammonia cooler, an ammonia circulating refrigerating unit and a second pressure reducing valve; the second liquid ammonia filling module is composed of a third valve group and a first ammonia liquid pump; the input end of a first absorption tower group in the ammonia gas recovery pry is connected with a liquid ammonia tank car (or a ship fuel tank) through a fan, one path of the output end of the first absorption tower group is connected with a second absorption tower group, and one path of the output end of the second absorption tower group is connected with the bottom of an ammonia adsorption tank; the other path of the output end is connected with the ammonia gas recovery passage through a third ammonia water pump; meanwhile, the second absorption tower group is also connected with a desalted water tank through a spraying water supply pump; the technical problems that in the liquid ammonia filling process, ammonia gas is wasted, an effective ammonia gas leakage treatment system is lacked, and the ammonia gas absorption efficiency is low are solved.

The application provides an ultramicroporous zinc-based MOF material, a preparation method thereof and application thereof in ammonia adsorption, and belongs to the technical field of crystalline materials. The material is an ultramicroporous zinc-based metal organic framework material with a three-dimensional periodic network structure, which is formed by coordination self-assembly of Zn 2+ ions, squarate ligands and triazoles ligands, wherein Zn 2+ ions exist in two coordination modes of hexa-coordinated octahedron and tetra-coordinated tetrahedron; the molecular formula of the material is [Zn2(C4O4)(C2H2N3)2], wherein C4O4 2‑ is a squarate ligand, and C2H2N3 ‑ is a triazole ligand. The application also provides application of the ultramicroporous zinc-based MOF material in ammonia adsorption. The MOF material has good stability, can maintain the integrity of the framework structure after being soaked in water for 7 days, and has good ammonia adsorption performance.

This invention relates to the field of aromatic amine preparation, specifically to a method for separating aromatic amines from ammonia. The method includes the following steps: (1) distilling a raw material containing aromatic amines and ammonia to obtain a light component containing ammonia and a heavy component containing aromatic amines; (2) adsorbing residual ammonia in the heavy component using an adsorbent to obtain an adsorbent for ammonia adsorption and aromatic amines. This invention, by coupling distillation and adsorption, can significantly reduce separation energy consumption and cost, and improve ammonia recovery rate and the purity of aromatic amine products.

The present invention proposes a method for determining the silanol content of silica, comprising the following steps: 1. Weighing a certain mass of silica and spreading it flat in a crucible; 2. Placing the crucible in an atmosphere furnace capable of programmable temperature rise, and purging the silica with nitrogen at a set temperature for a set time; 3. Switching the atmosphere furnace purge gas to ammonia, and subjecting the silica to ammonia adsorption treatment under certain conditions; 4. Switching the atmosphere back to nitrogen, and desorbing the physically adsorbed ammonia from the silica under certain conditions; 5. Removing the sample crucible and weighing the mass, and calculating the silanol content of the measured silica according to a formula. The method for determining the silanol content of silica proposed in the present invention has the advantages of simple operation, accurate results, strong anti-interference ability, good repeatability, and requires a small amount of sample, making it very suitable for testing small batches of silica samples.

The present application relates to the technical field of waste heat recycling, in particular to a method for converting industrial waste heat into low-pressure steam to drive ammonia adsorption refrigeration, comprising the following steps: Step 1: industrial waste heat collection and pretreatment, S1.1 waste heat classification collection: for different types of waste heat (slag waste heat, high-temperature flue gas, low-pressure steam, engine exhaust gas) in industrial production, special heat exchange devices are used for classification collection, wherein slag waste heat is recovered through indirect heat exchange devices; the present application efficiently recovers industrial low-grade waste heat and converts it into stable low-pressure steam of 0.3 MPa and above, and the waste heat utilization rate is increased to more than 85%; the refrigeration process does not consume high-grade energy, the main machine operates at zero cost, the comprehensive energy-saving rate is more than 77.8%, the annual electricity saving can reach 140,000 degrees per set, natural working substance ammonia is used as refrigerant, ammonia can be cyclically decomposed and compounded under natural conditions, and there is no greenhouse gas emission; fluorine-containing refrigerants such as freon are abandoned, atmospheric pollution is avoided from the source, and the green and low-carbon development trend is met.

The present invention belongs to the technical field of catalyst preparation, and particularly relates to a catalyst for reducing the generation amount of N₂O during the ammonia conversion process and a preparation method thereof. The catalyst of the present invention comprises a carrier, on which an ammonia adsorption and conversion functional coating and a NO reduction functional coating are sequentially coated; the NO reduction functional coating comprises a first molecular sieve and Cu or Fe, and further comprises a pore-forming template agent, and Cu or Fe is loaded on the first molecular sieve; the ammonia adsorption and conversion functional coating comprises a second molecular sieve and an active metal. The inner ammonia adsorption and conversion functional coating of the catalyst of the present invention can adsorb the excessive ammonia injected upstream at low temperature. As the temperature rises, the ammonia conversion ability increases, converting ammonia into NO. The formed NO rapidly diffuses to the outer NO reduction functional coating and reacts with the ammonia adsorbed by the outer NO reduction functional coating to generate N₂ and H₂O, effectively reducing the over-oxidation of ammonia and reducing the generation amount of N₂O.

The utility model discloses a system for eliminating escape of SCR (selective catalytic reduction) denitration ammonia of a coal-fired boiler, which comprises an ammonia gas preparation system and an SCR reactor, and the ammonia gas preparation system is connected with the SCR reactor through an ammonia gas conveying pipeline; an inlet flue of the SCR reactor is connected with a boiler economizer flue gas system; an ammonia gas adsorption device is arranged in an outlet flue of the SCR reactor, the ammonia gas adsorption device is a box-type adsorbent bed, an adsorbent is contained in the ammonia gas adsorption device, and the bottom of the ammonia gas adsorption device is connected with an adsorbent output pipeline; the other end of the adsorbent output pipeline is connected with the adsorbent desorption tower, the adsorbent output end of the adsorbent desorption tower is connected with the ammonia gas adsorption device through a desorbed adsorbent pipeline, and the ammonia gas output end of the adsorbent desorption tower is connected with the ammonia gas conveying pipeline through a desorbed ammonia gas pipeline. According to the scheme, excessive ammonia gas is adsorbed in the adsorbent, the problems of ammonia escape during SCR denitration and the like are thoroughly solved, the ammonia gas is reused after desorption, and resources and denitration operation cost are saved.

The invention discloses a wastewater deammoniation process based on ion exchange fiber, which specifically comprises the following steps: putting wastewater into a liquid storage bottle, connecting a water pump, a liquid flow meter and a cavity side of a hollow fiber membrane contactor to form a circulation loop, the shell side of the hollow fiber membrane contactor is sequentially connected with a valve, a vacuum gauge and a vacuum pump, the filter membrane in the hollow fiber membrane contactor is a modified filter membrane, the modified filter membrane comprises the following raw materials: polyvinylidene fluoride, lithium chloride monohydrate, modified fiber and modified filler, cations on the modified fiber and the modified filler can exchange ions with ammonia in the wastewater, and adsorb ammonia in the pores of the modified fiber and the modified filler, the zinc organic framework on the surface of the modified filler can provide a large number of gaps, and has more acid sites to increase the capture amount of ammonia, contains a zeolite structure inside, the zeolite contains calcium chloride inside, and the electronegativity of the zeolite surface can further absorb the ammonia stored in the zinc organic framework.

The ammonia adsorption tower drive control apparatus according to the present disclosure comprises: a sensor unit that measures an internal state of an adsorption tower; a memory storing one or more instructions; a processor that executes the one or more instructions stored in the memory; the driving unit is used for driving the adsorption tower according to an adsorption period and a desorption period which are set based on the internal state of the adsorption tower, and the processor is configured to output the corresponding adsorption period and desorption period according to sensing data of the sensor unit by utilizing a learned artificial intelligence model, when the sensing data is within a preset optimal range, an instruction for driving the adsorption tower according to the output adsorption period and desorption period is transmitted to the driving unit, and when the sensing data exceeds the optimal range, the adsorption tower is driven by the driving unit. And transmitting an instruction for executing an abnormal condition processing process according to a preset abnormal adsorption period and an abnormal desorption period to the driving unit.

This invention relates to the field of adsorbent technology, specifically to a method for preparing a high-adsorption-capacity ammonia refrigeration adsorbent suitable for low-pressure steam, comprising the following steps: Step 1: Raw material formulation optimization and pretreatment, S1.1 Formulation composition (by mass parts): Main adsorbent: 50-60 parts zinc oxide, 20-25 parts aluminum hydroxide, providing core adsorption active sites; This invention adopts a composite formulation of "main adsorbent + activity enhancer + pore structure regulator", which, after directional activation treatment, achieves an ammonia adsorption capacity ≥0.35g / g under low-pressure steam drive (desorption temperature 100℃), which is more than 40% higher than that of traditional adsorbents. This enables a 24,000 Kcal / h ice-making system to produce more than 5 tons of ice per day, making full use of low-pressure steam energy. The optimized preparation process reduces the adsorbent desorption activation energy to 80-90kJ / mol. At a low-pressure steam desorption temperature of 80-120℃, the ammonia desorption rate is ≥95%, and the adsorption capacity retention rate after 5000 cycles is ≥90%, with no significant attenuation.

The present application belongs to the technical field of poultry and livestock breeding, and relates to a poultry and livestock breeding method for reducing ammonia emission; the method comprises the following steps: laying a three-layer composite bedding material composed of a biological activation layer, an acid-base buffer layer and a basic adsorption layer before poultry and livestock enter a house, and continuously and stably reducing ammonia emission through the synergistic effect of physical adsorption, chemical neutralization and biological degradation; daily feeding of special ammonia-reducing feed containing composite plant extract, polysaccharide enzyme preparation and urease inhibitor to reduce the excretion of nitrogen-containing substances in feces from the source; spraying of a composite ammonia-removing agent according to the ammonia concentration gradient in the house to achieve precise control; mixing of feces and bedding material after poultry and livestock defecate, and supplement of ammonia adsorbent, so that the old bedding material can be composted into organic fertilizer. The present application constructs a whole-chain ammonia emission reduction system of'source control-process blocking-end conversion', effectively realizes long-term and stable control of the ammonia concentration in the poultry house, and improves the breeding environment.

The utility model discloses a flue gas ammonia removal device and an ammonia-doped combustion boiler. The flue gas ammonia removal device comprises an ammonia gas adsorption module which is used for allowing flue gas to pass through and adsorbing ammonia gas in the flue gas and comprises a receiving surface for receiving the flue gas; the frame comprises a bearing frame for bearing the ammonia gas adsorption module and a mounting part for mounting the flue gas ammonia removal device on an object to be mounted; and the size of the ammonia gas adsorption module along the passing direction of the flue gas passing through the ammonia gas adsorption module from the receiving surface is smaller than the size along the vertical direction perpendicular to the passing direction.

The present invention relates to an ammonia leakage gas treatment system and an ammonia leakage gas treatment method using same. The ammonia leakage gas treatment system of the present invention comprises: an adsorption and desorption unit comprising first and second adsorption towers containing an ammonia adsorbent therein, a selective supply line for selectively supplying leakage gas containing leaked ammonia gas to any one of the first and second adsorption towers, and a discharge line through which purified gas, from which ammonia gas has been removed, is discharged from the adsorption tower; a self-heating unit for causing self-heating of the ammonia adsorbent to adsorb or desorb the ammonia gas; and a catalyst unit for oxidizing the desorbed ammonia gas in the presence of a catalyst so as to discharge a treated gas, from which the ammonia gas has been removed, from the adsorption and desorption unit.

According to the solid-state cold and hot ammonia combined cycle system driven by the low-temperature heat source and the operation method, waste heat is guided into the ammonia storage part, the middle transmission part and the ammonia supply part through the industrial waste heat conduction part, adsorption and release of ammonia gas are promoted, recycling and reusing of the industrial waste heat are fully achieved, the external energy consumption requirement is reduced, and the energy consumption is reduced. And the overall energy conversion efficiency of the system is improved. The system adopts multi-stage cascade adsorption: ammonia gas output by an ammonia storage part is adsorbed again in a middle transfer part, and then is output to a cold / heat supply part through the middle transfer part; ammonia gas output by the ammonia storage part is re-adsorbed in the ammonia supply part and then is output to the application unit through the ammonia supply part, so that adsorption reactions in different stages are carried out at low temperature, a low-grade heat source is fully utilized, the requirement for the temperature of the heat source is lowered, energy consumption in the ammonia gas regeneration process is reduced, and the economical efficiency is improved; therefore, the economical efficiency of the ammonia adsorption system is improved on the whole, and the problem that an existing ammonia adsorption scheme is poor in economical efficiency is solved.

The invention relates to a shale oil hydrocracking method, which comprises: S1, in the presence of a first hydrofining catalyst, carrying out a hydrogenation saturation reaction on shale oil in a hydrogenation pretreatment device to obtain a first product; s2, in the presence of a second hydrofining catalyst, carrying out hydrofining reaction on the first product in a hydrofining device to obtain a second product; s3, introducing the second product into a separation device for separation, introducing a part of separated diesel oil and hydrogen into a hydrocracking device to be in contact with a catalyst for hydrocracking reaction, and introducing a hydrocracking reaction product into the separation device for separation; the catalyst in the hydrocracking device comprises a hydrocracking catalyst and a third hydrorefining catalyst. The method disclosed by the invention can be used for simultaneously producing the high-quality ethylene cracking raw material and the low-condensation-point diesel oil by taking the shale oil as the raw oil, and can effectively avoid the negative influence of ammonia adsorption on the cracking activity of the hydrocracking agent.

Provided is a method for regenerating a liquid to be treated, the method includes bringing a lactic acid adsorbent that contains a Mg—Al-based layered double hydroxide having Mg2+ and Al3+ as constituent metals, and an ammonia adsorbent having L-type zeolite, into contact with the liquid to be treated that contains lactic acid and ammonia, to remove lactic acid and ammonia in the liquid to be treated.

The invention belongs to the technical field of ammonia escape detection, and particularly relates to a vehicle diesel engine ammonia escape online detection method and system. According to the method, the running state of the catalyst is determined based on the change of the exhaust temperatures before and after the SCR catalyst, and the ammonia escape detection process is triggered when the running state is switched to the ammonia desorption dominant state, so that invalid judgment in an ammonia adsorption or reaction equilibrium stage is avoided, and the pertinence and reliability of ammonia escape detection are improved; the state switching time is introduced, the effective time range is determined according to the state switching time, ammonia escape judgment only occurs in the time period with the high ammonia release risk, the problem of misjudgment caused by transient working condition fluctuation or noise interference is effectively solved, and by comparing the accumulative theoretical ammonia supply amount with ammonia storage change parameters, the ammonia escape judgment accuracy is improved. The ammonia storage change deviation parameters are constructed, the deviation condition between the ammonia supply behavior and the SCR internal ammonia storage change can be reflected, and therefore the potential abnormal ammonia release trend can be recognized more accurately.

The application provides a rare earth metal loaded bagasse biomass charcoal ammonia adsorbent and a preparation method and application thereof, and belongs to the technical field of environmental functional materials.The application uses bagasse as a carbon matrix material, and modifies the material by phytic acid activation and rare earth metal salt loading to obtain a porous biomass charcoal material with uniform dispersion of rare earth metals.The introduction of the rare earth elements effectively controls the pore structure and surface electronic structure of the biomass charcoal, increases Lewis acid sites and coordination active centers, and enhances the chemical adsorption capacity of the biomass charcoal on ammonia molecules.The obtained adsorbent has a large specific surface area and rich surface functional groups, realizes the synergistic effect of physical adsorption and chemical adsorption, and significantly improves the ammonia adsorption capacity.The application has simple preparation process, low cost, and wide raw material sources, has good cycle stability and industrial application prospect, and can be used for ammonia purification in the fields of livestock and poultry breeding, sewage treatment and industrial waste gas treatment.

The application relates to the technical field of adsorbents, in particular to a high-temperature anti-powder-spraying adsorbent formula for industrial waste heat ammonia adsorption refrigeration, which is composed of the following components in parts by mass: zinc oxide 40-50 parts, aluminum oxide 20-25 parts, zirconium oxide 5-8 parts, silicon dioxide 3-5 parts, kaolin 6-10 parts, bentonite 4-6 parts, activated carbon 3-5 parts, sodium carboxymethyl cellulose 1-2 parts, titanate coupling agent 1-2 parts, silane coupling agent KH-550 0.5-1 part and boric acid 0.5-1 part; the composite formula of'main adsorbent + skeleton reinforcing agent + binder' is adopted, high-temperature calcination and surface modification treatment are carried out, the compression strength of the adsorbent particles is greater than or equal to 15 MPa, the abrasion rate is less than or equal to 0.5%, no obvious powder spraying phenomenon occurs after 5000 times of cyclic use, valve blockage and sealing abrasion can be effectively avoided, the high-temperature-resistant skeleton reinforcing agent is introduced into the formula, the crystal type transformation and sintering agglomeration of the adsorbent under high temperature of 120-200 DEG C can be inhibited, the specific surface area loss is less than or equal to 10% after 1000 times of circulation, the adsorption capacity retention rate is greater than or equal to 90%, the service life is prolonged to 8-10 years, and the system maintenance cost is greatly reduced.