46 results about "Ammonia adsorption" patented technology

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 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 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 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.

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 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.

The invention relates to the field of MOFs materials, in particular to a preparation method and application of an ultrahigh ammonia adsorption MOFs material, an organic ligand of the MOFs material is 3-aminopyridine-4-formic acid, a metal source of the MOFs material is manganous nitrate tetrahydrate, the preparation method comprises the steps that S1, the manganous nitrate tetrahydrate and the 3-aminopyridine-4-formic acid are dissolved in absolute ethyl alcohol, then sealing is conducted, and a precursor is obtained; performing continuous ultrasonic treatment for 10-20 minutes to obtain a mixed solution; s2, heating the mixed solution in an environment of 75-85 DEG C for 65-80 hours, and then cooling to room temperature to obtain a reaction solution; s3, washing the reaction liquid obtained in the step S2 with absolute ethyl alcohol, and then filtering and separating to obtain the MOFs material. The adsorption capacity of the prepared MOFs material on ammonia gas exceeds that of other MOFs materials, and meanwhile the MOFs material still has good adsorption capacity on ammonia gas after multiple times of adsorption and desorption.

The invention provides a bacteriostatic and deodorant sock based on coffee carbon modified fibers and a preparation method of the bacteriostatic and deodorant sock, and belongs to the field of functional textiles. Aiming at the problems of single function, insufficient partition design, poor durability and the like of the existing antibacterial socks, a three-layer composite structure is adopted: the inner layer is made of chitosan modified coffee carbon and cotton blended yarns, the middle layer is made of nano germanium polyester wrap yarns, and the outer layer is made of coffee carbon / spandex rib stitches. The sock heels and the sock toes adopt densified plain stitches and are embedded with the elastic fibers, so that the antibacterial fitness is improved; the sock bottom is provided with a moisture guiding groove and loaded with silver-loaded activated carbon microcapsules, so that sweat guiding is accelerated; regenerated PET is blended with coffee grounds to prepare fibers, and the fibers are subjected to plasma treatment and compound antibacterial agent finishing. The antibacterial rate of the product is greater than 99.8%, the antibacterial rate is still greater than 95% after 50 times of washing, the ammonia adsorption capacity reaches 4.2 mg / g, and the product has high environmental protection property and comfort.

An ammonia adsorbent according to an embodiment of the present invention may comprise a carbon molecular sieve (CMS) having, supported thereon, MgCl2 and CaCl2.

The application discloses a kind of dual-functional polymer-based ammonia adsorbent and preparation method thereof, which can efficiently adsorb low-concentration ammonia.The application is prepared by the following steps: first, quaternary ammonium reaction of vinyl imidazole and functional halogenated alkane, then chelation reaction of metal chloride, so that the product is dual-functional, then free radical copolymerization reaction of di-vinyl benzene, to obtain dual-functional polymer-based ammonia adsorbent with porous structure.The obtained polymer-based adsorbent contains weak acidic group and metal ion, and has ultra-high adsorption capacity for low-concentration ammonia (adsorption capacity for 3 vol.% ammonia can be as high as 10.8 mol / kg), and excellent regeneration performance and ammonia adsorption selectivity.The dual-functional polymer of the application has high adjustability of functional groups, and has good industrial application potential.

The invention discloses an ammonia tail gas molecular sieve adsorption device for triazole synthesis, and relates to the technical field of tail gas treatment, a molecular sieve is assembled in a tank, a heating piece is arranged in the molecular sieve, a condensation piece is mounted below the molecular sieve, and a collecting tank is arranged below the condensation piece. Tail gas enters the device through the inlet of the tank body, ammonia gas is adsorbed by the molecular sieve when the tail gas flows through the molecular sieve, and adsorbed gas is smoothly discharged from the outlet of the tank body; after the molecular sieve adsorbs ammonia gas to reach a saturated state, the ammonia gas is heated, the ammonia gas is desorbed and separated, the desorbed ammonia gas flows downwards to the condensing part and is cooled by the condensing part to be converted into ammonia water, the confluence part quickly converges the condensed ammonia water into the collecting tank, and the recovered ammonia water is guided out of the tank body through the collecting pipe, so that subsequent cyclic utilization is facilitated. Ammonia adsorption and recovery are integrated, ammonia tail gas is efficiently treated by means of a coherent process of molecular sieve adsorption, heating desorption and condensation recovery, environmental pollution caused by direct emission of ammonia is avoided, ammonia water resources are effectively recovered, and the comprehensive production cost is reduced.

The invention relates to the field of SCR (Selective Catalytic Reduction) denitration control, and discloses a feedforward and feedback compound control method and a feedforward and feedback compound control system for the ammonia injection amount of an SCR denitration system. Ammonia adsorption and desorption flux distribution is deduced based on the index tree and the real-time temperature change rate to obtain an ammonia storage dynamic response diagram, equivalent storage ammonia flow and theoretical ammonia spraying amount are calculated and superposed to generate an ammonia spraying feedforward compensation sequence, the ammonia spraying feedforward compensation sequence is input into a controller to generate an ammonia spraying control instruction and drive an execution mechanism, and meanwhile the index tree is updated online based on prediction deviation; according to the method, the ammonia storage capacity of the catalyst is parameterized, adsorption and desorption flux caused by temperature change is prospectively compensated, the problem of excessive ammonia or ammonia deficiency caused by rapid temperature change is solved, and stable control over outlet nitrogen oxide and ammonia escape in the load-variable temperature-variable process is achieved.

The utility model discloses a kind of ammonia recovery equipment and denitration system.Ammonia recovery equipment is used for denitration reactor, and ammonia recovery equipment includes: ammonia adsorption tower, ammonia adsorption tower is used to adopt ammonia adsorbent adsorption ammonia gas;Ammonia desorption tower, ammonia desorption tower is used to remove ammonia gas in ammonia adsorbent;Heat exchanger, heat exchanger includes first heat exchange flow path and second heat exchange flow path, first heat exchange flow path is used to connect between the high-temperature flue gas outlet of denitration reactor and the adsorption inlet of ammonia adsorption tower, first heat exchange flow path and second heat exchange flow path heat exchange, to pass the heat of high-temperature flue gas to second heat exchange flow path, the desorption inlet of ammonia desorption tower and the outlet of second heat exchange flow path are communicated, to utilize the high-temperature gas of second heat exchange flow path discharge to carry out ammonia gas removal.The utility model's ammonia recovery equipment can recover the ammonia gas of denitration reactor discharge that does not participate in reaction, reduce secondary pollution, and simultaneously can also realize the recycling of the heat of high-temperature flue gas of denitration reactor discharge.

To provide a structure having an excellent ammonia adsorption rate.SOLUTION: A honeycomb structure comprising partition walls defining a plurality of through holes, wherein the partition walls have a metal cyano complex, and the honeycomb structure is used for ammonia adsorption.SELECTED DRAWING: Figure 1

This invention relates to the field of temperature control system technology, specifically to an automatic switching and temperature control method for an ammonia adsorption refrigeration system generator. The ammonia adsorption refrigeration system includes three parallel generators (A, B, C), a sensor array, a PLC controller, a waste heat exchange system, a cooling water system, and a liquid ammonia storage tank. The invention is characterized by the following steps: Step 1: System initialization and parameter calibration; This invention employs an automatic switching mechanism using a PLC and sensor array, with a switching response time ≤0.5s, a refrigeration interruption time ≤0.1min during the switching process, and refrigeration capacity fluctuations controlled within ±5%, completely solving the refrigeration interruption problem caused by manual switching. Based on the adsorbent state and waste heat parameters, the desorption / adsorption temperatures are dynamically adjusted, with a desorption temperature control accuracy of ±2℃ and an adsorption temperature control accuracy of ±1℃. The adsorbent desorption rate is increased to over 95%, the adsorption saturation rate reaches 90%, and the system coefficient of performance (COP) is increased to over 0.8.

The invention belongs to the technical field of livestock breeding, and relates to a livestock breeding method capable of reducing ammonia emission. The method comprises the following steps: paving a three-layer composite padding consisting of a biological activation layer, an acid-base buffer layer and a basic adsorption layer before livestock enter a house, and continuously and stably reducing ammonia release through the synergistic effect of physical adsorption, chemical neutralization and biodegradation; a special ammonia reducing feed containing a composite plant extract, a polysaccharide enzyme preparation and a urease inhibitor is fed every day, and excretion of nitrogen-containing substances in excrement is reduced from the source; a composite ammonia removal agent is sprayed according to the concentration gradient of ammonia in the house, and precise regulation and control are achieved; after livestock defecate, feces and padding are mixed, an ammonia adsorbent is supplemented, and old padding can be composted and converted into organic fertilizer. According to the invention, a full-chain ammonia emission reduction system of'source control-process blocking-terminal conversion 'is constructed, the long-term stable control of the ammonia concentration of the poultry house is effectively realized, and the breeding environment is improved.

The invention discloses an ammonia hydrogen fuel cell system containing a tail gas treatment device. The ammonia hydrogen fuel cell system comprises an ammonia evaporation cabinet, an ammonia decomposition reaction device, a first heat exchanger, an adsorption device, a fuel cell, a second heat exchanger, a tail gas monitoring device and a tail gas adsorption device. The ammonia evaporation cabinet is divided into an ammonia storage area and a water storage area, the ammonia storage area is connected with the ammonia decomposition reaction device, and decomposed gas enters the fuel cell for power generation after heat exchange and adsorption. Liquid water in the water storage area flows back after being heated by the first heat exchanger and the second heat exchanger to supply heat to liquid ammonia evaporation. Tail gas is sequentially treated through the second heat exchanger, the tail gas monitoring device and the tail gas adsorption device, the tail gas adsorption device is divided into a residual ammonia adsorption module and a nitric oxide adsorption module, and efficient step-by-step adsorption of ammonia gas and nitric oxide can be achieved. The tail gas monitoring device distributes adsorption paths according to gas components, intelligent and efficient treatment of harmful components in tail gas is achieved, meanwhile, the energy utilization rate is increased through waste heat recovery, and the device has the advantages of being environmentally friendly, efficient, compact in structure and stable in operation.

This honeycomb structure includes a partition wall for defining a plurality of through-holes. The partition wall has a metal cyano complex. The honeycomb structure is used for ammonia adsorption.

The present invention relates to an ammonia adsorbent comprising magnesium silicate and a method for producing same and, more particularly, to an ammonia adsorbent comprising magnesium silicate that has been subjected to acid treatment following heat treatment, and to a method for producing same. The magnesium silicate for ammonia adsorption according to the present invention can replace adsorbent materials composed of precious metals and metal oxides, thereby providing an adsorbent material for reducing ammonia and nitrogen oxides with low dependence on foreign sources in ammonia co-combustion and full combustion processes.

This invention relates to the field of SCR denitrification control, and discloses a method and system for feedforward feedback composite control of ammonia injection rate in an SCR denitrification system. This method constructs a catalyst temperature storage index tree by collecting historical and real-time operating data of the SCR system to form a sample set of operating conditions. Based on the index tree and the real-time temperature change rate, it infers the ammonia adsorption and desorption flux distribution to obtain a dynamic response diagram of ammonia storage. It calculates the equivalent stored ammonia flow rate and superimposes it with the theoretical ammonia injection rate to generate an ammonia injection feedforward compensation sequence, which is then input into the controller to generate ammonia injection control commands and drive the actuators. Simultaneously, it updates the index tree online based on the prediction deviation. This invention, by parameterizing the catalyst ammonia storage capacity and proactively compensating for the adsorption and desorption flux caused by temperature changes, solves the problem of excessive or insufficient ammonia caused by rapid temperature changes, achieving stable control of outlet nitrogen oxides and ammonia escape during variable load and temperature processes.