Effect of Mo addition on precipitated Fe catalysts for Fischer-Tropsch synthesis

被引：45

作者：

Qin, Shaodong ^{[1
,2
]}

Zhang, Chenghua ^{[1
]}

Xu, Jian ^{[1
]}

Wu, Baoshao ^{[1
]}

Xiang, Hongwei ^{[1
]}

Li, Yongwang ^{[1
]}

机构：

[1] Chinese Acad Sci, State Key Lab Coal Convers, Inst Coal Chem, Taiyuan 030001, Peoples R China

[2] Chinese Acad Sci, Grad Univ, Beijing 10039, Peoples R China

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2009年 / 304卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

Fischer-Tropsch synthesis; Precipitated iron-based catalysts; Mo promotion; Hydrocarbon selectivivity; TEMPERATURE-PROGRAMMED REDUCTION; IRON CATALYSTS; PRODUCT DISTRIBUTIONS; OXIDE CATALYSTS; MANGANESE; SELECTIVITY; MOLYBDENUM; SPECTROSCOPY; CONVERSION; PROMOTER;

D O I：

10.1016/j.molcata.2009.02.001

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：

Effects of Mo addition on the performance of precipitated Fe catalysts for Fischer-Tropsch synthesis (FTS) were studied in a slurry reactor at 280 degrees C, 1.5 MPa, 2000 h(-1), and syngas H-2/CO= 1.2. The catalysts were characterized by N-2 adsorption, H-2 or CO temperature programmed reduction (TPR), NH3 temperature programmed desorption (TPD), X-ray diffraction (XRD), and Mossbauer effect spectroscopy (MES). It was found that there is a Strong interaction between Fe and Mo, which inhibited the reduction and carburization of Fe catalyst. The surface acidity of the catalysts was also found to increase with addition of molybdenum. In the FTS process, Mo addition decreased the FTS activity of Fe catalyst, markedly enhanced C-12(+) hydrocarbon selectivity, while suppressed C-2-C-8 hydrocarbon selectivity as validated by non-ASF product distribution curves. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：128 / 134

页数：7

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