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水蒸气改性H-FER分子筛在催化丁烯异构化反应中的应用
Authors
张诺伟
水彩玲
+4 more
郑弘光
郑进保
陈文汉
陈秉辉
Publication date
29 April 2019
Publisher
Abstract
为了进一步提高FER分子筛的催化性能及稳定性,以水蒸气对H-FER分子筛进行改性处理。结果表明,水蒸气处理可以有效调变对H-FER分子筛孔结构和酸性,且保持其晶型相对完整。在水蒸气流量和处理温度分别为1.0 mL/min和370℃下,处理30 min后的H-FER具有最佳的催化性能。X射线衍射和氮气吸脱附等表征结果表明,较高的水蒸气处理温度(370~420℃)和较大的水蒸气流量(1~3 mL/min)可同时调控微孔和介孔的结构。另一方面,介孔与微孔的合理匹配对H-FER催化剂的稳定性影响处于主要地位,酸性变化的影响则处于次要地位。而且,对于丁烯、异丁烯等反应物/产物,H-FER分子筛的微孔孔径不宜过大(<1.45 nm),dmicro/dmeso也不应大于0.19,即微介孔的连通性相当重要。中央高校基本科研业务费专项(20720170029
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Last time updated on 20/11/2020