Bifunctional Catalysis for the Conversion of Synthesis Gas to Olefins and Aromatics

被引:59
作者
Weber, J. Lennart [1 ]
Dugulan, Iulian [2 ]
de Jongh, Petra E. [1 ]
de Jong, Krijn P. [1 ]
机构
[1] Univ Utrecht, Debye Inst Nanomat Sci, Inorgan Chem & Catalysis, Univ Weg 99, NL-3584 CG Utrecht, Netherlands
[2] Delft Univ Technol, Radiat Sci & Technol, Fundamental Aspects Mat & Energy, NL-2629 JB Delft, Netherlands
基金
欧洲研究理事会;
关键词
bifunctional catalysis; dehydrogenation; Fischer-Tropsch to olefins; synthesis gas to chemicals; zeolites; FISCHER-TROPSCH SYNTHESIS; CARBON-SUPPORTED CATALYST; SELECTIVE CONVERSION; ZSM-5; CATALYSTS; SYNGAS; HYDROCARBONS; ZEOLITE; METHANOL; AROMATIZATION; ACTIVATION;
D O I
10.1002/cctc.201701667
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The conversion of synthesis gas (a mixture of hydrogen and carbon monoxide) to value-added chemicals has attracted significant attention in the past few years. Strong emphasis has been placed on enabling a process that allows the production of short olefins from synthesis gas, which can be derived from coal, biomass, or natural gas. Here, we introduce bifunctional catalysis to tailor the selectivity towards aromatics next to olefins by combining an iron-based Fischer-Tropsch to olefins catalyst with the acid function of a zeolite. Olefins were formed from synthesis gas on an iron-based catalyst and partly converted to aromatics on the acid sites of the zeolite. Surprisingly, this aromatization did not follow the pathway of hydrogen transfer, whereby three paraffin molecules are produced for every aromatic molecule formed, which allowed us to obtain carbon selectivity towards chemicals (sum of lower olefins and aromatics) of 70-80% at 1bar reaction pressure. Increasing the partial pressure of hydrogen led to substantial hydrogenation of olefins towards paraffins.
引用
收藏
页码:1107 / 1112
页数:6
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