561results about "Gas purification by catalytic conversion" patented technology

A continuous fixed-bed catalytic reactor includes an inflow path for raw material gas for a catalytic reaction and an outflow path for reformed gas, a catalytic reaction container that is connected to the inflow path and the outflow path and holds a clumpy catalyst, catalyst holders that have a ventilation property and hold the clumpy catalyst, and a driving mechanism that moves the clumpy catalyst up and down by moving the catalyst holders up and down.

The invention relates to a catalytic deoxidation process of oxygen-contained coal bed gas. The oxygen-contained coal bed gas and coal bed gas product gas returned with a certain recycle ratio are mixed to go to a fixed bed adiabatic catalytic reactor, methane in the coal bed gas is reacted with oxygen to generate carbon dioxide and water, thereby the concentration of the oxygen in the coal bed gas product gas is reduced to be lower than 0.2 percent. The invention can effectively remove the oxygen in the oxygen-contained coal bed gas with the concentration of the oxygen of 1-15 percent, the recovery ratio of the methane is similar to theoretical recovery ratio obtained by calculation according to complete conversion of the methane and the oxygen, and security risk which exists in subsequent coal bed gas separation (liquification, pressure varying adsorption, barrier separation, and the like) technical process can be completely eliminated due to the low-concentration oxygen in the product gas.

The invention relates to a coal bed gas deoxidation catalyst as well as a preparation method and the application thereof. The coal bed gas deoxidation catalyst takes one or the combination of severalplatinum group noble metals, i.e. Pd, Pt, Ru, Rh and Ir, as main catalyzing active components and takes one or the combination of several alkali metal/alkaline-earth metal oxides, i.e. Na2O, K2O, MgO,CaO, SrO and BaO, and multi-element compound oxides of CeO2, lanthanide series rare earth elements, i.e. Pr, Nd, Sm, Eu, Gd, and the like, or/and transition elements, i.e. Y, Zr, La, and the like, or/and gamma-Al2O3 as auxiliary catalysts, and the catalyzing components are loaded on an inert carrier in a coating way so as to prepare an integral catalyst. The coal bed gas deoxidation catalyst hasthe advantages of low igniting temperature, stable combustion process, high activity, long service life, and the like, is suitable for the methane catalyzing and combustion process taking coal bed gasdeoxidation purification as a purpose and can also be extensively applied to the catalyzing and combustion process of CO and low-carbon hydrocarbon under fuel-rich and oxygen-poor reducing atmosphere.

A high-temperature gas composite oxide desulfurizer and its production are disclosed. The desulfurizer consists of active component zinc oxide 33í½50% and multiple additives 31í½51% which comprises titanium dioxide, active stabilizer, surface modifier, strength reinforcer, regenerative improver and composite binder. The process is carried out by mixing active component with additives, grinding, kneading, forming, laying aside, drying, particle rectifying, calcining at 850í½1060íÒC in high-temperature furnace, and obtaining desulfurizer. It achieves better reactivity and efficiency, good abrasion resistance and regeneration. It can be used for fixed bed, fluidized bed and desulfurizing reactor of flowing bed.

A catalyst used directly for oxidative desulfurizing to H2S gas contained acidic gas is proportionally prepared from iron oxide, aluminum oxide, titanium oxide, zinc oxide, and vanadium oxide by co-deposition method. It has high activity, selectivity and H2s conversion rate.

The invention provides a green circular economy technology with coal coking as the main part. The technical scheme of the technology is as follows: a coal coking part, a coal tar processing part, a carbon black part and a part of combined power and thermoelectricity generation by coke oven gas are organically combined to form the relationship of industrial metabolism, symbiosis and coupling; suchmeasures as differentially utilizing tail gas of carbon black, recovering energy of coke drying quenching, reducing, recycling and changing the three wastes into resources, etc., enable resources to be saved, production cost to be reduced and pollution to be lessened; therefore, economic benefits of coal coking enterprises are maximized and the green circular economy technology is realized indeed. The invention also provides an apparatus for realizing the green circular economy technology with coal coking as the main part.

The various embodiments of the present invention relate generally to the process of gasification and the production of synthesis gas. More particularly, the various embodiments of the present disclosure relate to the process of biomass gasification and the reduction or elimination of tars from the hydrocarbon-rich product gas derived from biomass gasification. The present invention comprises systems and methods for the reduction of tar from a synthesis gas derived from biomass gasification.

An intermediate temperate carbonyl sulfur hydrolysis catalyst and the preparation method and use is provided, which belongs to the technology field of catalyst and the preparation method and use. The invention is mainly improving the anti-sulfate performance of the catalyst under intermediate temperature by adding modifier V2O5 to change the composite of the catalyst, the preparation method is that: mix the components of catalyst with porous materials components evenly, add water or nitric acid to knead, extrude to forming, then dry and activate. When the catalyst is Phi 3mm multiple 5mm industrial grain, under the normal pressure, the reaction temperature is 200 to 400 DEG C., the airspeed is 4000 to 10000h-1, the concentration of COS is lower than 500mgS/m3. The catalyst in the invention has high COS hydrolysis activity and anti-sulfate performance, the COS hydrolysis conversion rate is more than 99 per cent, which can be used in 200 to 400 DEG C. COS hydrolysis conversion in the feed gas with a 0 to 12 per cent of 02 content.

The invention provides a fine desulfurization process for blast furnace gas, and belongs to the technical field of gas desulfurization. The process specifically comprises the following steps that blast furnace gas enters an organic sulfur hydrolysis system after being subjected to bag dust removal; and the hydrolyzed gas enters a top pressure recovery turbine power generation device and then enters a wet alkali washing desulfurization system. The organic sulfur hydrolysis system comprises a hydrolysis reactor and an acoustic wave soot blowing system, and the wet alkali washing desulfurizationsystem comprises an absorption tower, a circulating water tank, a circulating water pump, an alkali liquor storage tank, an alkali liquor pump, a process water tank and a process water pump. The process can effectively reduce resistance loss caused by the hydrolysis system and save large operation cost for enterprises.

The invention relates to an organic sulphur hydrogenation catalyst, comprising specific parts by weight of Al2O3 carrier, ZnO, iron oxide and molybdenum oxide. ZnO added in the hydrogenation catalyst disclosed by the invention is taken as an assistant, and has excellent synergistic effect together with active components of iron oxide and molybdenum oxide. Compared with the sulphur hydrogenation catalyst in the prior art, the organic sulphur hydrogenation catalyst has high thiofuran conversion and removal efficiency when used for removing organic sulfide such as thiophene in gas.

The invention discloses coking oven gas hydrodesulfurization catalyst and a method for preparing the same. The coking oven gas hydrodesulfurization catalyst is prepared by loading active components on the carrier of Gamma-Al2O3 with the immersion method. The active components comprises iron oxide, molybdenum oxide and cobalt oxide, wherein the weight of the iron oxide is 2-10 percent of the totalweight of the coking oven gas hydrodesulfurization catalyst, the weight of the molybdenum oxide is 5-20 percent of the total weight of the coking oven gas hydrodesulfurization catalyst, the weight ofthe cobalt oxide is 0.1-5 percent of the total weight of the coking oven gas hydrodesulfurization catalyst, and the balance is Gamma-Al2O3. The coking oven gas hydrodesulfurization catalyst has the characteristic of high hydrodesulfurization activity, less methanation reaction and CO disproportionation reaction and good thermal stability, etc.

This invention provides one kind of catalyst which can improve organic sulfur hydrolysis rate.First,organic sulfur hydrolysis additive and carrier material is made into alkaline material through the process of kneading drying roasting and grinding.Then,mixing the carrier material alkaline material and alkali soil material,also adding peptizing agent,the catalyst carrier can be made through the process of kneading extruding strip and roasting.The catalyst carrier cab be made into sulfur tolerant shift catalyst by impregnating active component molybdenum and cobalt either alkali metal.The outstanding advantages of this invention is that enhanceding the surface alkaline of carrier by adding alkali promoter in the carrier material, which not only improve the activities of catalyst to the organic sulfur,but also improve the low temperature activities of the catalyst.The catalyst of this invention can be used in pressure range of 1.0-5.0MPa.

The embodiment of the invention discloses a method for producing methanol, which comprises the following steps of: purifying coal converter gas; mixing the purified converter gas and coke oven gas to obtain mixed gas; and performing reaction on the mixed gas to obtain the methanol. In the method and the equipment for producing the methanol, byproduct gas generated in the steelmaking process, namely the converter gas is purified and mixed with the coke oven gas in the coking process according to a proper ratio, so that a carbon/hydrogen ratio in the synthetic gas generated through desulfurization and conversion of the mixed gas meets the requirement of a theoretical value, the utilization rate of useful elements in the raw materials is improved, the production efficiency is improved, the pollution of waste gas to the environment is reduced, the production cost is reduced and the economic benefit is improved.

A catalytic element useful for promoting catalytic gas phase reactions is provided, comprising a porous ceramic body comprising a multiplicity of open pores having a coating comprising a basic oxide material and a catalyst material selected from transition metal and noble metal compounds

A process for the clean-up of a crude syngas stream having widely varying composition and particulate load. The process includes quenching the crude syngas stream with a liquid stream to cool the syngas stream and remove particulates, tars and heavier hydrocarbon compounds. The process further includes co-scrubbing the syngas stream to remove both HCl and NH₃ from the syngas stream, removing particulate matter from the syngas stream, and removing sulfur from the syngas stream. A syngas treatment system is also disclosed.

The invention provides a blast furnace coal gas fine desulfurization and purification method, which comprises that S1, blast furnace coal gas enters a conversion unit under a positive pressure, and the organic sulfur in the blast furnace coal gas is converted into hydrogen sulfide; S2, the obtained material enters a cooling unit and is cooled; and S3, the cooled stream enters an adsorption unit filled with an adsorption material, and the sulfide in the blast furnace coal gas is adsorbed and removed to form purified coal gas. According to the invention, the low-concentration sulfides in blast furnace coal gas are enriched into sulfur-rich concentrated gas to convert the working condition with large-capacity and low-concentration sulfides into the working condition with small-capacity and high-concentration sulfides, so that the desulfurization effect can be improved, the desulfurization investment cost and the operation cost can be reduced, the sulfur element in the blast furnace coal gas can be recovered, the atom economy is high, and the secondary pollution is reduced.

The invention discloses a high-temperature dust-removing and coke-removing integrated purifying process of biomass crude gas and provides a new process for high-efficiency purification of biomass high-temperature gas at low cost. The process comprises a high-temperature gas heat exchanger (A), a high-temperature gas purifier (B), a Venturi pulse back-blowing system (C), a gas preheater (D) and an electric-heating insulation system (E), wherein the five sets of equipment operate cooperatively to form a set of complete high-temperature gas purifying integrated device; a filtering medium in the high-temperature gas purifier is a modified ceramic membrane dust-removing pipe. When filtering cakes on the outer surface of the modified dust-removing pipe are deposited to certain thickness, deposited ash can be back-blown into an ash discharging hopper box for collection by the Venturi pulse back-blowing system. The high-temperature dust-removing and coke-removing integrated purifying process disclosed by the invention has the advantages that high-efficiency separation and integrated treatment of ash and coke components in biomass gas are realized; the dust-removing temperature is low so as to be beneficial to reducing the manufacturing cost of the equipment and prolonging the service life; biomass ash side products with commercial value are produced while the high-efficiency purification of the biomass crude gas is realized; the process flow is simple and flexible, the operation is simple, the purification cost is low and the suitability for industrial production is achieved.

The invention discloses a biomass stress-free gas producing machine which comprises a machine, an air inlet oxygen-feeding device, a rotary dedusting device and a circulating hot water supply device; the biomass stress-free gas producing machine is characterized in that the machine is internally provided with a gas producing collision reaction device and more than one set of parallel-connected or serially-connected gas producing reaction device; each set of gas producing reaction device comprises a gasification furnace, a wastewater and tar high-temperature pyrolysis reaction device and a swaging actuating device; the wastewater and tar high-temperature pyrolysis reaction device is filled with dolomite; the secondary pure gas output tubes arranged at the bottom of each set of the wastewater and tar high-temperature pyrolysis reaction device are connected with the bottom of the collision reaction device after serially connected or parallel connected subsequently. The biomass stress-free gas producing machine is a novel gasification device to carry out second decomposition on the wastewater and tar by using the high-temperature chemical reaction of the wastewater and tar and the dolomite, which takes the dolomite as medium to carry out decomposition on the wastewater and tar by high temperature, so as to actually achieve the goals of zero emission, no secondary pollution, green environmental protection and large-scale gas production in the biomass gas producing technology.

The invention relates to a biomass coke tar catalyst with mayenite loaded with calcium and iron compounds as well as a preparation method and an application of the biomass coke tar catalyst. The catalyst takes the mayenite (Ca12Al14O33) as a carrier and is also loaded with the calcium and iron compounds at the same time; and main chemical components comprise CaO, the mayenite and iron compounds with coke tar catalyzing activity. Compared with a traditional biomass coke tar catalyst, the novel catalyst provided by the invention has the following beneficial effects that (1) compared with a Ni-based catalyst, an iron active component of the coke tar catalyst has the advantages of environmental friendliness and low price; (2) the catalyst contains the CaO and biomass gasified synthetic gas with high-concentration H2 is easy to prepare; (3) the Ca12Al14O33 carrier can be used for easily reducing deposited carbon of the catalyst, the strength of the catalyst can be improved and the activity of absorbing CO2 can be improved; and (4) the catalyst is prepared by adopting a sol-gel method and various active components of the catalyst are uniformly distributed.

The invention discloses a coke oven gas desulfuration and deamination combined purifying method and a special device thereof. The method comprises a desulfuration method and a deamination method; coke oven gas desulfuration adopts a wet type catalytic oxidation method, and deamination adopts a water washing method; coke oven gas is subjected to cooling naphthalene scrubbing before being desulfurized and then desulfurized; the coke oven gas is subjected to the water washing method deamination and ammonia evaporation after being desulfurized; and ammonia consumed by desulfuration is derived from ammonia generated by gas and ammonia evaporation. The special device comprises an oil naphthalene scrubbing precooling tower, a desulfurizing tower, an ammonia water washing tower and an ammonia evaporating tower which are connected in sequence. The combined process disclosed in the invention has the characteristics of high efficiency, energy saving, lower investment and lower operating cost. The concentrated ammonia water circulating process has the function of adsorbing and removing hydrogen sulfide. The desulfuration and deamination combined process has the effect of desulfuration twice. In addition, a gas naphthalene scrubbing precooling tower adopted by the process of the invention has the functions of scrubbing naphthalene and cooling gas, and the naphthalene scrubbing adopts a wayof combining spraying absorption, liquid film absorption and cooling, thereby improving the naphthalene scrubbing and precooling effect.