46results about How to "High decomposition activity" patented technology

A composite nano-photocatalyst for cleaning air is composed of anatase-type TiO2, and the (15-25)-nm Fe2O3 and V2O5. It can effectively decompose the formaldehyde, benzene and ammonia in air under irradiation of light.

The invention provides a ferro-cobalt bimetallic load mordenite catalyst for catalyzing the nitrous oxide (N2O) decomposition and a preparation method. The catalyst can be used for decomposing most or all N2O in a pollution discharge system into N2 and O2 under the conditions that the space velocity is 30000h<-1>, the reaction temperature is 400 to 500 DEG C, the N2O concentration is 0.1 to 30 percent, and the H2O is 2 to 10 percent. In addition, the catalyst has high stability, and the activity of the catalyst is not decayed after 100h of the continuous nitric plant tail gas emission simulation. The catalyst has the advantages that the preparation process is simple, the cost is low, the catalyst is used for the catalytic N2O decomposition, the activity is high, and the stability is good. The technology has wide applicability, can be used for the N2O emission reduction process (such as processes of nitric acid production, adipate production and the like) of multiple industry sources and has wide application prospects.

The invention provides a low-temperature activation efficient ammonia decomposition catalyst and a preparation method thereof, and belongs to the field of ammonia decomposition catalysis. The catalyst is a nickel-containing FER molecular sieve; according to the molecular sieve, a nickel-containing carbon material is taken as a nickel source and a hard template agent, and metal nickel is introduced into the FER molecular sieve in situ; and the content of nickel in the nickel-containing molecular sieve is 0.1-5wt.% in terms of nickel element. the invention also provides a preparation method of the catalyst. The method specifically comprises the following steps of: adding a nickel-containing carbon material, a silicon source, an aluminum source, an organic template agent, inorganic base and a solvent into a reactor according to proportions; continuously stirring the materials to obtain uniform sol, aging the uniform sol; transferring the sol to a hydrothermal reaction kettle for crystallization; performing filtering, washing, drying and roasting on a product which is obtained after the reaction is finished; carrying out hydrogen transformation on an obtained molecular sieve; and finally roasting to obtain the nickel-containing FER molecular sieve. The catalyst disclosed by the invention has the advantages of rich microporous structure, short crystallization time and high catalyst activity and stability; the temperature required by ammonia decomposition is greatly reduced; and the catalyst has huge industrial application potential.

The invention discloses a preparation method of a supported medium and high temperature denitration catalyst. The method comprises the following steps: 1, dissolving a soluble active metal component precursor salt and a soluble auxiliary metal component precursor salt into deionized water to obtain a transparent impregnation solution; 2, impregnating a molecular sieve carrier for 6h-24h, filtering, drying at temperature of 80-120 DEG C for 12h-24h to obtain a catalyst precursor; 3, putting the catalyst precursor in a heat treatment furnace, heating to 300 DEG C-400 DEG C, calcining while introduction of air for 1h-3h, heating up to 600-800 DEG C, calcining for 2h-6h, and cooling to obtain the supported medium and high temperature catalyst. The supported medium and high temperature denitration catalyst prepared by the method has high strength, is not easy to pulverize, has long service life, and has low catalyst bulk density. The catalyst has a NO conversion rate of 85% or more at a suitable application temperature of 300 to 500 DEG C.

The invention discloses an oyster mushroom cultivation method. Oyster mushroom cultivation materials comprise, by mass, 47%-49% of cotton seed hulls, 19%-21% of Chinese silvergrass powder, 28%-32% of lotus seed hull powder, 0.8%-1.0% of calcium superphosphate, 0.9%-1.1% of gypsum powder and 0.1% of thiophanate methyl, wherein the mass fraction sum of all the components is 100%. When oyster mushrooms are cultivated, a mushroom shed is firstly set up, the raw materials are prepared and mixed, strain selecting, inoculating, mushroom shed disinfesting and sterilizing and spawn running are performed, and then mature oyster mushrooms can grow out. According to the oyster mushroom cultivation method, the idle land resources such as wasteland, waste mountains and forest open spaces around a house in countryside are reasonably utilized, waste utilization is achieved, pollution to the environment is reduced, the cultivation cost is low, and the method is extremely easy to apply and popularize in majority of peasant households, cooperatives and enterprises.

The invention relates to a progressive slow piling steaming box which is suitable for the steaming and the rinsing or the dying after the cold pad-batch pretreatment and the piling and the steaming before the printing of pure cotton and cotton-polyester blended fabrics. The steaming box comprises a box body (1), a progressive slow piling device (4) and a cloth supporting basket (5), wherein the progressive slow piling device (4) and the cloth supporting basket (5) are arranged in the box body (1); the progressive slow piling device (4) comprises a gear box motor (4.15), three transmission shafts (4.14), four rocker arm mechanisms and a cloth moving basket (4.16); a plurality of cloth supporting strips I (4.16.1) and a plurality of cloth supporting strips II (5.1) are convexly arranged on the cloth moving basket (4.16) and the cloth supporting basket (5) and distributed along the length direction of the box body; and the cloth supporting strips I (4.16.1) on the cloth moving basket (4.16) and the cloth supporting strips II (5.1) on the cloth supporting basket (5) are mutually spaced. The steaming box can ensure that the surfaces of fabrics cannot be scratched to have grinding defects and can not be scalded and has uniform and thorough steaming effect.

The present invention belongs to the field of pollution controlling technology, relates to catalyst for direct decomposition of nitrogen oxide, and is one kind of catalyst for direct decomposition ofnitrogen oxide under rich oxygen condition. The composite catalyst CuZSM-5/MHn is prepared through mixing CuZSM-5 and MHn and roasting inside inert atmosphere at 500-800 deg.c for 2-3 hr. Inside the composite catalyst, MHn accounts for 5-15 wt%. The composite catalyst CuZSM-5/MHn has high nitrogen oxide decomposing activity and high oxygen resisting activity. The composite catalyst has 20 % raised CuZSM-5 decomposition rate in the condition of oxygen content of 0-10 vol%, and unchanged high activity in the stability test of 10 hr.

The invention relates to a catalyst for nitrous oxide decomposition and a preparation method of the catalyst. The preparation method comprises the following steps that 1) a silicon source, an aluminumsource and an organic template are added into water and adjusted to be alkaline to prepare a molecular sieve mother liquor; 2) a porous ceramic carrier is immersed in the molecular sieve mother liquor for crystallization; 3) metal ion exchange is performed on the crystallized porous ceramic carrier in step 2) to obtain a porous ceramic carrier containing a metal ion/molecular sieve; high-temperature calcination is carried out to obtain the catalyst. The molecular sieve in the preparation method is directly synthesized in situ on the porous ceramic carrier, a coating is firmly combined with the carrier, the catalyst is used for catalyzing N2O after the exchange with active components is performed, the degrading activity is high, and the water resistance is strong.

The invention discloses an oyster mushroom cultivation method. An oyster mushroom culture material comprises, by mass, 45.8-47.8% of corn cob powder, 29-31% of wheat bran, 18-22% of miscanthus powder, 1.9-2.1% of calcium superphosphate, 0.9-1.1% of gypsum, 0.1% of urea, and 0.1% of carbendazim. A total of the mass percentages of the components is 100%. During a cultivation process, a mushroom shed is first built; the raw materials are prepared and mixed; a strain is selected and inoculated; the mushroom shed is subjected to pest killing and sterilization; and spawn running is allowed, such that mature oyster mushrooms can be obtained. According to the invention, free land resources such as wasteland, barren hill and forest open spaces among houses in the countryside are reasonably utilized, such that waste is utilized. With the method, environment pollution is reduced, and culture cost is low. The method can be easily popularized among farmers, cooperatives and enterprises.

The invention discloses a preparation method of a cleaning agent. The cleaning agent comprises a cleaning agent extract and water. The cleaning agent extract is prepared by steps: taking algae extract liquid, and adding complex enzyme P being 0.3-1.0% of the mass of the algae extract liquid to obtain algae-complex enzyme P mixed liquid; adjusting pH of the mixed liquid to 5-8, adjusting the temperature to 25-50 DEG C, and performing enzymolysis reaction for 24-72h to obtain the cleaning agent extract. By a biological fermentation process for production of cleaning antibacterial components, efficiency in extraction of active components in the extract is greatly improved; due to adoption of natural substances, environment pollution caused by the chemical cleaning agent is avoided; the method is simple and convenient, and a wide range in application is realized.

The invention provides a silver-manganese oxide composite catalyst and a preparation method and application thereof. The preparation method comprises the following steps that an alkaline solution is added into a mixed solution of a manganese source and a silver source to react to generate solid precipitate; and the obtained solid precipitate is roasted to obtain the silver-manganese oxide composite catalyst. The silver-manganese oxide composite catalyst is prepared through a co-precipitation-roasting method, the catalyst forms a manganese-barium ore crystal structure, the electron transfer rate is high, the catalytic ozone decomposition activity is high, and when the relative humidity is about 70%, the ozone conversion rate can reach 80% or above in 6 h. The catalyst preparation method issimple and fast, the preparation process is high in controllability, adopted raw materials and the operating process are low in cost, and industrial production is facilitated.

Provided is a polychlorinated biphenyl-decomposing composition obtained according to a method comprising respectively culturing at least one main microbial strain belonging to Comamonas species and having biphenyl dioxygenase, and at least one complementary microbial strain selected from the group consisting of Pseudomonas species, Achromobacter species, Rhodococcus species and Stenotrophomonas species and having biphenyl dioxygenase, and mixing at least two types of microbial cells recovered from each of the culture media. A composition containing these compounded microorganisms is useful for efficiently decomposing or detoxifying comparatively low concentrations of PCBs present in large amounts in waste products contaminated with polychlorinated biphenyls.

The invention belongs to the technical field of tea processing and particularly relates to a preparation method of tea. The preparation method specifically comprises the following operation steps: (1)picking fresh leaves; (2) withering; (3) rolling: putting the withered tea leaves into a rolling machine for rolling, installing an extraction type ice cube box at the lower end of a rolling disc ofthe rolling machine, adding ice cubes into the extraction type ice cube box, wherein the height of the extraction type ice cube box is 15-20 cm, the height of the added ice blocks is 2/3 of the heightof the full extraction type ice block box every time, rolling for 20-25 minutes, and stopping rolling; (4) fermenting; (5) frying: after fermentation is completed, executing drying at 90-120 DEG C. The preparation method has the advantage that the quality of the tea can be effectively improved.

The present invention provides: a catalyst for purification of exhaust gases which catalyst is excellent as a denitrification catalyst which has still more excellent ability to remove nitrogen oxides and of which the ability to oxidize sulfur dioxide into sulfur trioxide is extremely suppressed and further as a catalyst which is favorable for efficiently removing organohalogen compounds, such as dioxins, from exhaust gases; a production process therefor; and a process for purification of exhaust gases. The catalyst for purification of exhaust gases comprises titanium oxide, molybdenum oxide, and vanadium oxide as catalytic components, wherein the titanium oxide and the molybdenum oxide are included in the catalyst in the form of: a binary closely mixed oxide which is beforehand prepared and includes titanium and molybdenum; and/or a trinary closely mixed oxide which is beforehand prepared and includes titanium, silicon, and molybdenum.

The present invention relates to mutants of penicillin G acylase from Achromobacter sp. CCM 4824 and uses thereof, and more specifically relates to Mutants of penicillin G acylase in a wild type penicillin G acylase protein sequence including an Alpha subunit shown in SEQ ID NO.1 and a Beta subunit shown in SEQ ID NO.2 and a method of preparing (synthesizing) Beta-Lactam antibiotics by using theMutants of penicillin G acylase, wherein the Mutants of penicillin G acylase select at least one mutation from a population consisting of A65AlphaV, A102AlphaE, A106AlphaT, D74BetaQ, R120BetaC, T176BetaS, Y180BetaS, T193BetaI, Y248BetaF, F254BetaY, T292BetaS, F343BetaY, E366BetaV and T485BetaS as the feature. The Mutants of penicillin G acylase from Achromobacter sp. CCM 4824, having a specific mutation form, are characterized by multiple syntheses with high efficiency for multiple semi-synthesized Beta-Lactam antibiotics.

The invention belongs to the technical field of ammonia-hydrogen conversion, and particularly relates to a graphene composite material ammonia-hydrogen conversion catalyst and a preparation method thereof. The graphene composite material ammonia-hydrogen conversion catalyst comprises a graphene-containing composite oxygen hydride, and a metal-based graphene composite oxygen hydride with catalytic activity is obtained by introducing a metal compound solution with ammonia synthesis activity. The graphene composite material ammonia-hydrogen conversion catalyst prepared by the invention has higher decomposition activity than a metal oxide, and aims at reducing the use amount of Ru, Fe, Co and Ni catalysts and other metal loading, so that the cost of the ammonia synthesis catalyst is reduced, the ammonia-hydrogen conversion catalyst with low metal loading capacity is designed and realized, the economic benefit is reduced, industrial production. and the catalytic activity of ammonia-hydrogen conversion is improved.

PURPOSE: A manufacturing method of honeycomb-shaped catalyst for purifying exhaust gas with titanium dioxide powder is provided to manufacture a catalyst of an organic halogen compound with high resolution activity or high denitrifying activity. CONSTITUTION: A manufacturing method of honeycomb-shaped catalyst includes a step for kneading an active metal component or a precursor, catalyst titanium dioxide powder for processing exhaust gas, and one or more component in a group consisting of titanium dioxide and titanium complex oxide, a step for extruding a dough to a honeycomb structure, and a step for sintering and drying. The active metal component or the precursor are V, W, Mo, Cr, Mn, Fe, Ni, Cu, Ag, Au, Pd, Y, Ce, Nd, In or Ir.

The present invention relates to mutants of penicillin G acylase from Achromobacter sp. CCM 4824 and uses thereof, and more specifically relates to Mutants of penicillin G acylase in a wild type penicillin G acylase protein sequence including an Alpha subunit shown in SEQ ID NO.1 and a Beta subunit shown in SEQ ID NO.2 and a method of preparing (synthesizing) Beta-Lactam antibiotics by using the Mutants of penicillin G acylase, wherein the Mutants of penicillin G acylase select at least one mutation from a population consisting of A65AlphaV, A102AlphaE, A106AlphaT, D74BetaQ, R120BetaC, T176BetaS, Y180BetaS, T193BetaI, Y248BetaF, F254BetaY, T292BetaS, F343BetaY, E366BetaV and T485BetaS as the feature. The Mutants of penicillin G acylase from Achromobacter sp. CCM 4824, having a specific mutation form, are characterized by multiple syntheses with high efficiency for multiple semi-synthesized Beta-Lactam antibiotics.

The invention discloses a preparation method of a nitric acid industrial carbon emission reduction catalyst. The method comprises the following steps: 1, dissolving an active component precursor and an auxiliary agent precursor in deionized water to obtain a transparent dipping solution; 2, adding the cerium dioxide powder into a dipping solution for dipping treatment, and drying to obtain a catalyst precursor; 3, uniformly mixing an adhesive, a pore forming agent and the catalyst precursor, adding water, kneading, and carrying out extrusion molding to obtain a catalyst blank; and 4, drying the catalyst blank, and roasting to obtain the nitric acid industrial carbon emission reduction catalyst. According to the present invention, the types and the proportions of the active components and the auxiliary agent are designed, and the roasting treatment process and the process parameters are controlled so as to obtain the catalyst with the relatively dispersed active components and the high crystallinity, such that the number of the effective active centers in the catalyst is increased so as to improve the activity of the catalyst, and the catalyst has better high-temperature stability and is suitable for N2O emission reduction in the nitric acid production process.

The invention discloses a portable micro-pressure oxygen cabin main machine, the structure of which comprises a suspender main body, a main machine bag, a main machine, a ventilation groove, a wool surface layer, a hook surface layer, a conduit and an oxygen output tank. The beneficial effects of the invention are as follows: the oxygen output tank is arranged on the structure to solve the problemof how oxygen can maintain oxygen delivery release to wounds in a long-term treatment process, the hook block can enhance the anti-falling performance of equipment, and the hook structure of the portable micro-pressure oxygen cabin main machine can prevent elastic ropes from being disconnected from the hook block, thereby enhancing the continuous and stable release of high-purity oxygen producedby the oxygen cabin main machine to wound surfaces within a certain period of time, thereby speeding up wound healing scabbing.