Co-Cu/ZrO2-La2O3催化剂用于合成气制低碳醇的研究

摘要

采用柠檬酸络合-多次浸渍法制备了一系列ZrO₂负载LaCo_0.7Cu_0.3O₃钙钛矿结构的催化剂。利用X射线衍射(XRD)、透射电镜(TEM)、程序升温还原(TPR)等技术对催化剂进行表征,并采用加压微型固定床反应器对其合成气转化制低碳醇的催化性能进行评价。结果表明,催化剂前驱体经还原后形成了氧化镧修饰的氧化锆载体负载CoCu合金颗粒(Co-Cu/ZrO₂-La₂O₃),CoCu合金颗粒与氧化镧修饰的氧化锆载体之间的共同作用使催化剂显示了优良的醇选择性,特别是C₂₊醇的选择性。

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	潘东明
	刘贵龙
	刘源

关键词： CO加氢；低碳醇；钴铜合金；氧化锆

Abstract：

A series of zirconia-supported LaCo_0.7Cu_0.3O₃ catalysts with different LaCo_0.7Cu_0.3O₃ content were prepared by impregnating ZrO₂ with lanthanum, cobalt and copper nitrate and citrate acid, and the prepared samples were characterized by XRD, TEM and H₂-TPR techniques. The synthesis of alcohol from syngas was performed in a stainless-steel continuous fixed-bed flow micro-reactor. After reduction, the catalyst precursor favored to form nanoparticles of Co-Cu alloy highly dispersed on ZrO₂ and modified with La₂O₃. The metal nanoparticles of Cu-Co alloy together with ZrO₂ modified with La₂O₃ contributed to the excellent selectivity of alcohols and higher alcohols.

Keywords： CO hydrogenation； higher alcohols； cobalt-copper alloy； zirconia

Received 2014-03-10;

Fund:

国家自然科学基金资助项目(21376170, 21263011)。

Corresponding Authors: 刘源,E-mail:yuanliu@tju.edu.cn。 Email: yuanliu@tju.edu.cn

About author: 潘东明(1989-),男,硕士研究生,现从事多相催化方向的研究。

引用本文:

潘东明, 刘贵龙, 刘源.Co-Cu/ZrO₂-La₂O₃催化剂用于合成气制低碳醇的研究[J]. 化学工业与工程, 2015,32(4): 1-6

Pan Dongming, Liu Guilong, Liu Yuan.Studies on Higher Alcohols from Syngas over the Co-Cu/ZrO₂-La₂O₃ Catalysts[J]. Chemcial Industry and Engineering, 2015,32(4): 1-6

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