34results about How to "Achieve complete oxidation" patented technology

The invention belongs to the technical field of the catalytic purification of environments, and provides a nanoflower spinel CoMn2O4 catalyst for the catalytic oxidation of VOCs (Volatile Organic Compounds), a preparation method and application thereof. Oxalic acid is used as a precipitator; the pinel CoMn2O4 catalyst is obtained by washing, drying and calcination. The CoMn2O4 catalyst prepared bythe preparation method exhibits that nanosheets form a nanoflower-shaped structure through self-assembly. Compared with oxides Co3O4 and MnOx, a mixed phase Co3O4 / MnOx and a spinel CoMn2O4 catalyst reported by current literature, the spinel CoMn2O4 catalyst prepared by the preparation method shows better activity and stability in removal of the VOCs, can reach 99 percent of the toluene removal rate at 220 DEG C, is used for realizing 100 percent conversion of formaldehyde at 90 DEG C, meanwhile, can have the acetone removal rate reaching 100 percent at 170 DEG C, and has a better industrial application prospect.

The invention provides a low-load palladium-platinum core-shell structure catalyst. The catalyst is prepared through the following method that a Pd precursor and propylene carbonate are mixed, stirring for reacting is carried out for 1 h to 5 h in the hydrogen atmosphere of 1 MPa to 4 MPa under the room temperature condition, and a solution containing Pd nano particles is obtained; a Pt precursor is added into the obtained solution containing the Pd nano particles, stirring for reacting is carried out for 1 h to 5 h in the hydrogen atmosphere of 1 MPa to 4 MPa under the room temperature condition, and a solution containing core-shell structure active components is obtained; the obtained solution containing the core-shell structure active components and a carrier Al2O3 are mixed, stirring is carried out for 4 h to 48 h, suction filtration is carried out, a filter cake is subjected to vacuum drying, and a finished product is obtained. According to the synthesis method of the catalyst, raw materials are easy to obtain and can be reused, waste gas and waste water are not generated, the environmental cost is low, scaling up can be easily carried out for industrial production, the activity of the prepared catalyst is higher than that of a catalyst obtained according to an existing method, stability is good, and the catalyst can be applied to a methylbenzene catalytic oxidation reaction.

The invention relates to metal ions adsorbed by bentonite and a regenerating method of the metal ions adsorbed by the bentonite. According to the regenerating method, a good effect is achieved by treating Cu2+, Ni2+ and Co 2+ waste water through the bentonite serving as an adsorbent, after the collected metal ions are subjected to complexation and separation in a two-phase system, the metal ions adsorbed by the bentonite and oleic acid radical ions are subjected to complexation and transferred to an organic phase, the bentonite in a water phase can continue to be used for adsorbing metal ions after being washed centrifugally, the oleic acid-metal coordination compound in the oleic phase is respectively calcinated in the argon environment and the air environment to form nano metal oxide powder with high added-value, and resource utilization of the metal ions is achieved.

An exhaust gas purification catalyst belongs to the technical field of exhaust gas treatment. The preparation method of the catalyst uses a mixed solution of water and dimethyl sulfoxide as a solvent to prepare a bimetallic supported catalyst Cu-Pt / CeO by a wet impregnation method 2 ‑Al 2 o 3 . Compared with the prior art, the catalyst prepared by the present invention can show high catalytic activity under normal use conditions, can effectively inhibit the performance degradation of the catalyst active component caused by the (S) component in the exhaust gas, and is suitable for mass production , has the possibility of industrialized production, and has broad application prospects.

The invention discloses a preparation method of a two-dimensional flaky porous composite oxide and its application in the control of chlorine-containing volatile organic pollutants. The aqueous solution of zinc nitrate hexahydrate is added to the methanol solution of dimethylimidazole, and stirred until white, filtered, and dried to obtain a white powder; add an aqueous cobalt nitrate hexahydrate solution to the white powder aqueous solution, then add ammonia water, stir, and then hydrothermally crystallize at 120-160°C for 8-12h, then dry and roast to obtain Two-dimensional sheet-like porous composite oxides. The two-dimensional sheet-like catalytic material prepared by the invention has a very rich pore structure and highly dispersed active sites, which can effectively improve the mass transfer capacity of target pollutants, thereby exhibiting excellent oxidation performance of chlorinated volatile hydrocarbons. The invention has the advantages of low raw material price, simple synthesis method, simple synthesis conditions, low requirements on equipment, and good industrial application prospect.

The invention discloses a brake shoe workshop curing furnace waste gas treating system and a brake shoe workshop curing furnace waste gas treating method. The system comprises a diffused smoke treating system and a waste gas treating system, wherein the diffused smoke treating system comprises a first gas flue which is respectively connected with diffused smoke outlets of a first curing furnace door smoke hood and a second curing furnace sealing chamber; the first gas flue is sequentially connected with a first centrifugal fan and an outer chimney; the waste gas treating system comprises a second gas flue which is respectively connected with waste gas outlets of a first curing furnace and a second curing furnace; the second gas flue is sequentially connected with a second centrifugal fan, a combustion chamber, a third centrifugal fan and the outer chimney. The system and the method have the beneficial effects that combustible pollutants, suspended carbon granules and smog-shaped organics in curing furnace waste gas can be burnt off, and odor gas can be completely oxidized; the system and the method have the advantages of obvious peculiar smell removing effect, high deodorization efficiency, convenient technique operation, stable operation performance and the like; a work field environment and the surrounding environment are greatly improved; the requirement of national environment protection is met.