新型分层ZSM-5沸石的合成及其在去除三氯乙烯中的应用（英文）

A self‐supporting ZSM‐5 monolith with a hierarchical porosity was prepared using polyurethane foam (PUF) as a structural template and a hydrothermal synthesis procedure. The synthesized monolith was characterized and investigated towards the adsorption and catalytic oxidation of trichloroethylene(TCE). Adsorption of TCE was studied gravimetrically and oxidation of TCE was studied using a vapor‐phase down‐flow reactor. Monolithic ZSM‐5 displayed good sorption proper‐ties and completely oxidized TCE. Conversion levels of 50% and 90% were achieved at reduced temperatures(by ~50 °C) when compared with the conversion temperatures obtained from the powder counterparts. Besides the activity of the monolith towards TCE adsorption and oxidation, it was stable and enhanced diffusion, thereby reducing pressure drops to a great extent owing to its hierarchical porous nature.