3results about How to "Avoid desorption" patented technology

The application discloses a kind of in-situ As contaminated soil heat treatment remediation methods of strengthening thermal efficiency, comprising the following steps: S1, soil treatment agent preparation;S2, steam injection point layout;S3, steam injection heating extraction repair;S4, hot air injection point layout;S5, soil treatment agent overturning;S6, hot air injection repair.The application can effectively remove organic pollutants in soil by using steam injection and hot air injection two kinds of heat treatment in cooperation with special soil treatment agent application, and can promote soil treatment agent synergistically.Although heat treatment cannot directly remove As pollutants in soil, it can concentrate As pollutants to some extent, and promote the fixation effect of soil treatment agent on As pollutants by changing soil environment, realizing the synergistic removal of organic pesticide pollutants and As in farmland soil, and achieving 1+1>2 effect.

The application discloses a supported metal catalyst modified by a hydrophobic surface ligand, a preparation method and application, and the supported metal catalyst comprises a metal active component and a carrier, the carrier is a composite carrier in which a molecular sieve is attached to a columnar activated carbon pore opening, the molecular sieve is TS-1, MCM-41 and ZSM-5, the silicon-aluminum ratio of the molecular sieve is 20-100, the material of the activated carbon is coconut shell, walnut shell, apricot shell or wood, the specific surface area of the activated carbon is 800-2000 m 2 / g; the metal active component is one of platinum, palladium, ruthenium and rhodium, and the metal loading is 0.2-5.0 wt%. The application can adjust the adsorption mode of reactants on the catalyst, selectively adsorb nitro by the hydrophobic property of the catalyst, complete the hydrogenation reaction, and rapidly discharge the hydrophilic product, so that over-hydrogenation and halogen removal are avoided, reaction equipment is protected, and the selectivity of the reactant is improved.

The invention provides a bimetallic composite catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: smelting flue gas is subjected to plasma strengthening and then is in contact with the bimetallic composite catalyst; the smelting flue gas contains chlorobenzene and / or dioxin; under the condition that the smelting flue gas contains chlorobenzene, the concentration of the chlorobenzene in the smelting flue gas is 50-500ppm; under the condition that the smelting flue gas contains the dioxin, the concentration of the dioxin in the smelting flue gas is not higher than 20 ng TEQ / m < 3 >. The technical problems that in the common technology, the degradation efficiency of CVOCs such as chlorobenzene is insufficient, and synchronous and efficient degradation of chlorobenzene and dioxin is difficult to achieve at the same time are solved, efficient mineralization of chlorobenzene is achieved through multi-path coupling, and meanwhile efficient adsorption and deep degradation of dioxin are synchronously achieved.