Al distribution and catalytic performance of ZSM-5 zeolites synthesized with various alcohols
Al distribution and catalytic performance of ZSM-5 zeolites synthesized with various alcohols
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DOI：
10.1016/j.jcat.2017.06.026
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发表时间：
2017-09-01
影响因子：
7.3
通讯作者：
Yokoi, Toshiyuki
中科院分区：
文献类型：
--
作者：
Biligetu, Turgen;Wang, Yong;Yokoi, Toshiyuki
铝原子在ZSM-5分子筛中的分布被认为是影响催化剂活性的重要因素。本文以合成凝胶为原料合成了ZSM-5分子筛，其中含有各种醇，包括直链和支链醇。通过~(27)AI MAS核磁共振、Co(II)离子UV-Vis DRS和约束指标值考察了合成凝胶中醇类对Al在MFI骨架中分布的影响。将合成的ZSM-5分子筛用于正己烷裂解和甲醇制烯(MTO)反应，考察了Al分布对催化剂性能的影响。三羟甲基乙烷(TME)与钠离子复合使用，在MFI骨架上实现了独特的Al分布，对正己烷裂解和MTO反应均表现出较长的催化寿命。(C)2017 Elsevier Inc.保留所有权利。
The distribution of Al atoms in ZSM-5 has been recognized as an important factor in catalytic activity. Here, ZSM-5 zeolites were synthesized from synthetic gels containing various alcohols, including straight- and branched-chains alcohols. The effect of the alcohols in the synthetic gel on the Al distribution in the MFI framework was investigated based on (27)AI MAS NMR, Co(II) ion UV-vis DRS, and constraint index value. Thus synthesized ZSM-5 zeolites were applied to catalysts for the cracking of n-hexane and the methanol-to-olefins (MTO) reactions in order to investigate the impact of the Al distribution on the catalytic properties. A unique Al distribution in the MFI framework was achieved by the use of trimethylolethane (TME) in combination with Na cations, and thus-prepared ZSM-5 catalyst showed a long catalytic life for both the cracking of n-hexane and the MTO reaction. (C) 2017 Elsevier Inc. All rights reserved.