文献类型：期刊文献

英文题名：Product distributions and olefin-to-paraffin ratio over an iron-based catalyst for Fischer-Tropsch synthesis

作者：Yan, Fang[1,2];Qian, Weixin[1];Sun, Qiwen[3];Zhang, Haitao[1];Ying, Weiyong[1];Fang, Dingye[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Minist Educ, Engn Res Ctr Large Scale Reactor Engn & Technol, Shanghai 200237, Peoples R China;[2]Yankuang Lunan Chem Fertilizer Plant, Qingdao 277527, Shandong, Peoples R China;[3]State Key Lab Coal Liquefact & Coal Chem Technol, Shanghai 201203, Peoples R China

年份：2014

卷号：113

期号：2

起止页码：471

外文期刊名：REACTION KINETICS MECHANISMS AND CATALYSIS

收录：;EI(收录号：20150100398659);WOS:【SCI-EXPANDED(收录号:WOS:000344811200012)】；

基金：The financial support from the Major State Basic Research Development Program of China (973 plan) (Project No. 2010CB736203), the National High Technology Research and Development Plan of China (863 plan) (Project No. 2011AA05A204) are gratefully acknowledged.

语种：英文

外文关键词：Fischer-Tropsch synthesis; Iron catalyst; Product distribution

摘要：An iron-based catalyst was prepared by the co-precipitation method. The product distributions and olefin-to-paraffin ratio (O/P ratio) with chain length of Fischer-Tropsch synthesis over the iron-based catalyst were investigated under different reaction conditions in an integral fixed bed reactor. It is found that the product distributions are non-ASF situation, and the deviation from ASF law was analyzed by taking the physisorption, solubility, volatility of products and the subsequent secondary reactions into consideration. It is noted that the contents of hydrocarbons decline with increasing carbon number and higher temperature, space velocity, H-2/CO in feed gas and lower pressure is preferential for the formation of light hydrocarbons but against the chain propagation. The O/P ratio shows an exponential decrease with chain length except for ethylene and ethane because of the special adsorption character of ethylene. The O/P ratio is also affected by operating conditions. The results indicate that higher reaction temperature, space velocity of feed gas, lower pressure and higher H-2/CO in the feed gas are preferential for the formation of olefins and the enhancement of O/P ratio.