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LDH-Derived (CuZn)xAly Bifunctional Catalyst for Direct Synthesis of Dimethyl Ether from Syngas
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-05-13 , DOI: 10.1021/acs.iecr.0c01508
Sha Tian 1 , Minghui Tan 1 , Qingxiang Ma 2 , Xuemei Wu 1 , Chunhui Luan 3 , Yuan Fang 4 , Hangjie Li 4 , Guohui Yang 1 , Noritatsu Tsubaki 4 , Yisheng Tan 1
Affiliation  

The direct synthesis of dimethyl ether (DME) from syngas can be realized by mixing a methanol synthesis catalyst and a methanol dehydration catalyst. Different from the general studies on mixture catalysts, herein, we presented a concise (CuZn)xAly catalyst derived from layered double hydroxides (LDHs) and investigated their catalytic performance for the direct synthesis of DME from syngas. The LDH precursors with different molar ratios of (CuZn)/Al were synthesized by a coprecipitation method. After calcination and reduction of LDH precursors, two types of catalytic components could be generated on the catalyst simultaneously and could perform dual catalytic actions for DME synthesis. The structure and catalytic performance of catalysts were greatly influenced by the ratio of (CuZn)/Al. When the ratio of (CuZn)/Al was 1:3, (CuZn)1Al3 presented the highest CO conversion and DME selectivity. The superior catalytic performance of (CuZn)1Al3 could be attributed to the synergic catalytic effect between well-dispersed Cu species and Al2O3.

中文翻译:

用于合成气直接合成二甲醚的LDH衍生(CuZn)x Al y双功能催化剂

由合成气直接合成二甲醚(DME)可以通过混合甲醇合成催化剂和甲醇脱水催化剂来实现。与关于混合催化剂的常规研究不同,本文提出了一种简洁的(CuZn)x Al y由层状双氢氧化物(LDHs)衍生的催化剂,并研究了它们对由合成气直接合成DME的催化性能。通过共沉淀法合成了不同摩尔比的(CuZn)/ Al的LDH前体。LDH前体经过煅烧和还原后,可以在催化剂上同时生成两种类型的催化组分,并对DME合成起双重催化作用。催化剂的结构和催化性能受(CuZn)/ Al比的影响很大。当(CuZn)/ Al的比例为1:3时,(CuZn)1 Al 3表现出最高的CO转化率和DME选择性。(CuZn)1 Al 3的优异催化性能可以归因于良好分散的Cu物种与Al 2 O 3之间的协同催化作用。
更新日期:2020-05-13
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