On the effect of water during Fischer-Tropsch synthesis with a ruthenium catalyst

被引:98
作者
Claeys, M [1 ]
van Steen, E [1 ]
机构
[1] Univ Cape Town, Dept Chem Engn, Catalysis Res Unit, ZA-7700 Rondebosch, South Africa
关键词
Fischer-Tropsch synthesis; ruthenium; water partial pressure; activity; selectivity; methane;
D O I
10.1016/S0920-5861(01)00469-2
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
The addition of water during Fischer-Tropsch synthesis over a supported ruthenium catalyst led to a significant increase in product formation rates and significant changes in product selectivity, in particular lower methane selectivity and improved chain growth. Upon increasing water partial pressures, the total product distribution shifted from ASF distributions, with typical deviations due to olefin reinsertion, to a much narrower distributions. Such distributions can mechanistically not be explained by sole C-1-wise chain growth. An additional product formation route considering combination of adjacent alkyl chains to form paraffins ("reverse hydrogenolysis") has been proposed. The findings are discussed with regard to the crucial mechanistic role of water as a moderator in the kinetic regime of the Fischer-Tropsch synthesis. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:419 / 427
页数:9
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