A Novel Method for Synthesis of ZSM-5 Coatings on Monolithic Cordierite Substrate

• 来源期刊: 中国化学（英文版）
• 学科: 化学
• 年，卷（期）: 2001,（3）
• 页码范围: 227-232
• 页数: 6页
• 分类号: O6
• 语种: 英文

摘要

ZSM-5 coatings have been synthesized onto a monolithic cordierite substrate by an environmental friendly and high coating selectivity method—Vapor Phase Transport (VPT) .With this method, an aluminosilicate gel coated onto the monolithic cordierite substrate has ben transformed into a ZSM-5 layer under vapors of n-butylamine and water. nButylamine played a key role in the forming of ZSM-5 layer on the cordierite substrate. The ZSM-5/cordierite monolith composites prepared by this method were ion-exchanged with Cu2+ and tested for the selective catalytic reduction of NO by propane. The deNOx activities of Cu/ZSM-5 monolith catalysts were not only dependent on the ion-exchange methods,but also on the ZSM-5 loading of the monolith catalysts. Tne best result was obtained over the Cu (B3)/ZSM-5 monolith catalyst, which had a ZSM-5 loading of about 13% and was prepared by a pressure exchange procedure. At a temperature of 723 K and a space velocity of 10,000 h-1(based on the monolith volume), 85% of NO conversion and 93% of C3H8 conversion were achieved over the Cu(B3)/ZSM-5 monolith catalyst.