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首页> 外文期刊>Catalysis science & technology >Designing a novel dual bed reactor to realize efficient ethanol synthesis from dimethyl ether and syngas
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Designing a novel dual bed reactor to realize efficient ethanol synthesis from dimethyl ether and syngas

机译：设计一种新型的双床反应堆实现高效乙醇合成二甲醚和合成气

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摘要

A novel dual bed reactor packed with a combination of a zeolite (H-modernite or H-ferrierite) catalyst and a CuZnAl catalyst was proposed to realize direct ethanol (EtOH) synthesis from dimethyl ether (DME) and syngas (CO + H-2). DME and CO were firstly introduced into the upper zeolite bed to commence the carbonylation reaction, and then H-2 was directly introduced into the CuZnAl catalyst bed below to accomplish the hydrogenation of methyl acetate (MA) produced at the first catalyst bed. In this novel dual bed process, DME and CO were introduced into the reactor at the top of the first catalyst bed layer, but H-2 was introduced into the second catalyst bed layer directly through an inner stainless steel tube equipped with evenly distributed holes. Benefitting from the precise control of the distribution of the reactants on the surface of different catalysts, an enhanced catalytic performance was obtained compared with the conventional dual bed reactor which introduced DME and syngas into the reactor simultaneously. The synergistic effects offered by this novel dual bed reactor were further confirmed by numerous comparative tests. Our results show that the excellent catalytic performance in this novel dual bed reactor was ascribed to the improved CO partial pressure in the upper zeolite catalyst bed. Compared with the conventional dual bed reactor, both DME conversion and EtOH yield were almost doubled in this novel dual bed reactor packed with the combination of the H-ferrierite and CuZnAl catalysts.
机译：一种新颖的双床反应堆挤满了一个组合沸石(H-modernite或H-ferrierite)提出了催化剂和CuZnAl催化剂实现直接乙醇(EtOH)合成二甲醚(测距装置)和合成气(CO + h2)。和公司首先引入上沸石床开始羰基化反应,然后2直接引入到CuZnAl催化剂床下面乙酸甲酯加氢(MA)生产在第一个催化剂床。过程中,测距装置和有限公司引入第一催化剂床反应器的顶部第二个层,但2被引入直接通过催化剂床层内部不锈钢管配备均匀分布式漏洞。控制反应物的分布不同催化剂的表面,一个增强催化性能而获得的传统双床反应堆介绍了测距装置和合成气进入反应堆同时进行。进一步通过这部小说双床反应器证实了大量的对比试验。结果表明,优秀的催化这部小说表现双床反应堆归因于改进的CO分压上面的沸石催化剂床。传统双床反应堆,测距装置转换和EtOH收益率几乎翻了一倍这本小说双床反应堆挤满了H-ferrierite和CuZnAl组合催化剂。

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