Dealumination of mordenites with acetic acid and their catalytic activity in the alkylation of cumene
Dealumination of mordenites with acetic acid and their catalytic activity in the alkylation of cumene
复制标题
DOI：
10.1016/j.micromeso.2007.08.031
复制
发表时间：
2008-04-15
影响因子：
5.2
通讯作者：
Chung, Kyong-Hwan
中科院分区：
文献类型：
--
作者：
Chung, Kyong-Hwan
用乙酸处理丝光沸石 (MOR) 沸石 (Si/Al = 5) 以降低酸位浓度，而其孔结构没有显着变化。用于异丙苯与 2-丙醇烷基化的酸处理 MOR 沸石显示出更长的催化剂寿命，同时保持相似水平的对位选择性。酸处理导致MOR沸石微孔的轻微扩大并没有降低对位选择性，而酸位点浓度的降低通过抑制积炭提高了MOR沸石的稳定性。讨论了酸处理的 MOR 沸石与其孔径分布和酸度相关的催化性能。 (C) 2007 Elsevier Inc. 保留所有权利。
A mordenite (MOR) zeolite (Si/Al = 5) was treated with acetic acid to reduce acid site concentration without a significant change in its pore structure. The acid-treated MOR zeolites employed in the alkylation of cumene with 2-propanol showed longer catalyst life with retaining similar level of para-selectivity. The slight enlargement of micropores of MOR zeolite due to the acid treatment did not lower the para-selectivity, while the reduction of acid site concentration improved the stability of MOR-zeolite by suppressing carbon deposit. The catalytic performance of the acid-treated MOR zeolites was discussed relating to their pore size distributions and acidities. (C) 2007 Elsevier Inc. All rights reserved.