3results about How to "Reduce competitive adsorption" patented technology

The invention discloses an ozone oxidation catalyst for casting waste gas treatment and a preparation method thereof, and belongs to the technical field of waste gas treatment. The mordenite is used as a catalyst carrier, the fluorinated silane is loaded on the surface of the mordenite through a reflux liquid phase deposition method to construct a hydrophobic barrier, the modified mordenite is obtained, the ozone decomposition performance of the modified mordenite in a high-humidity environment is remarkably improved, and further in an intermittent micro-negative pressure environment, the ozone decomposition performance of the modified mordenite is improved. A transition metal oxide is loaded on the surface of the modified mordenite to obtain the ozone oxidation catalyst, and through optimization of a preparation process, namely roasting activation and intermittent micro-negative pressure treatment are combined with a proper proportion of metal oxide sol, the number and accessibility of active sites of the catalyst are enhanced, and the ozone catalysis performance of the catalyst is promoted to be further improved. The ozone oxidation catalyst is applied to the treatment of casting waste gas, especially toluene-containing waste gas, and can show efficient, stable and high-adaptability treatment effects under different working conditions.

The utility model provides a glycine drying tail gas treatment device belongs to glycine production technical field solves the problem that the prior art cannot recover small granular material and the poor absorption effect of methanol in the tail gas after the spray tower. The glycine drying tail gas treatment device includes pulse cloth bag dust collector, spray tower and granular carbon adsorption device, pulse cloth bag dust collector is used for separating gas and granular material, recycles granular material, the import of spray tower and the gas outlet of pulse cloth bag dust collector intercommunication, granular carbon adsorption device includes demister, drying heater and granular carbon adsorber, and the outlet of spray tower, demister, drying heater and granular carbon adsorber intercommunication in proper order, the outlet of granular carbon adsorber and total exhaust cylinder intercommunication, and granular carbon adsorber can adsorb the methanol in gas. The glycine drying tail gas treatment device can recover small granular material, can be accurate and efficient dust removal, can also adsorb the methanol remaining in tail gas.

The invention discloses a method for selectively adsorbing copper ions by adopting an aspartic acid silicon-based carbon dot material, and belongs to the technical field of nano material preparation and environmental pollution treatment. A surface-functionalized silicon-based carbon dot material is prepared by heating through a water bath method, the surface-functionalized silicon-based carbon dot material and an acid solution containing copper ions are mixed and subjected to ultrasonic treatment, and the copper ions in the solution are adsorbed by the aspartic acid silicon-based carbon dot material. The surface of the aspartic acid silicon-based carbon dot material is modified by functional groups, the functional groups can be combined with copper ions through coordinate bonds, the specific functional groups are introduced to selectively capture the copper ions for coordination to form a stable chelate, and the aspartic acid silicon-based carbon dot material can expose more adsorption sites and adsorb more copper ions.