3results about How to "Low oxidation temperature" patented technology

The application provides a Pt-based catalyst and a preparation method and application thereof, and belongs to the technical field of environmental catalysis.The Pt-based catalyst comprises a CeO2-CoAlO composite oxide carrier and Pt supported on the surface of the CeO2-CoAlO composite oxide carrier, the mass ratio of the Pt to the CeO2-CoAlO composite oxide carrier is 0.1-1:100, and the mass ratio of CeO2 to CoAlO in the CeO2-CoAlO composite oxide carrier is 1-80:100.CeO2 and CoAlO are compounded as a carrier for CO oxidation, the synergistic effect between the active metal and the carrier is fully exerted, the catalytic activity is improved by adjusting the mass ratio of CeO2 and CoAlO to create effective CeO2-CoAlO interface active sites, and thus the CO oxidation temperature is reduced.

The application provides a method for treating TPU waste by using molten salt, and belongs to the field of solid waste treatment.The method can solve the problems of traditional TPU waste treatment methods, such as easy generation of harmful gas, high cost and low safety.The method comprises the following steps: S1, drying a certain amount of CaCO3 and Ca(OH)2 at a certain temperature for a certain time, removing the excess water, fully mixing the dried CaCO3 and Ca(OH)2 at a certain proportion, and placing the mixture in a reaction kettle; S2, heating the reaction kettle to a certain temperature and keeping the temperature for a certain time to melt the CaCO3-Ca(OH)2 system; S3, adding TPU waste with a certain mass ratio of the melted CaCO3-Ca(OH)2 system into the reaction kettle to react, and forming waste salt after reacting for a certain time; S4, treating the waste salt after the reaction kettle discharges the waste salt to obtain a residue sample, weighing the residue sample to obtain a degradation rate, characterizing the composition and content of the waste salt sample, and determining the content of nitrate in the waste salt.The method is mainly used for treating TPU waste.

The present application relates to the technical field of volatile organic compounds treatment, and discloses a selective catalytic oxidation catalyst, a preparation method and application thereof, the catalyst contains catalyst A and catalyst B, the catalyst A contains a first carrier and a first active component, the catalyst B contains a second carrier and a second active component, the first active component and the second active component both contain Cu; the first carrier is one or more of alumina, titania, ceria, zirconia, ceria-zirconia solid solution and silica; the second carrier is one or more of ZSM-5 type molecular sieve, SSZ-13 molecular sieve, beta type molecular sieve, SAPO-34 type molecular sieve and Y type molecular sieve; the weight ratio of the catalyst A and the catalyst B is 1:0.2-5, and the Dv90 of the selective catalytic oxidation catalyst is 1-20 mu m. The catalyst has high conversion rate and high N2 selectivity for catalytic oxidation of nitrogen-containing VOCs.