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Role of Promoters in the Hydrogenation of Carbon Monoxide over Iron-Based Catalysts - 1983

I. R. Leith

Council for Scientific and Industrial Research

In this pdf format, this document has 41 pages and is 1.9MB.

Table of Contents

1

 Introduction 5
2 Mechanism of the FT Synthesis 6
3 Chemisorption of H2 and CO on Iron 6
3.1 Effect of Additives on H2 Chemisorption 8
3.2 Effect of Additives on CO Chemisorption 8
3.3 Coadsorption of H2 and CO 9
4 Iron-Based Catalysts for CO Hydrogenation 9
4.1 Precipitated Catalysts 9
4.2 Fused Catalysts 10
4.3 Promoters for Precipitated and Fused Catalysts 10
4.3.1 Structural Promoters 10
4.3.2 Chemical Promoters 10
4.4 Miscellaneous Catalysts 11
5 Structure of Iron Catalysts 13
5.1 Precipitated and Related Catalysts 13
5.1.1 Before and After Reduction 13
5.1.2 During Synthesis 13
5.2 Fused Catalysts 15
5.2.1 Before and After Reduction 15
5.2.2 During Synthesis 19
6 Catalytic Behaviour of Iron Catalysis 19
6.1 Activity 19
6.1.1 Time dependant behaviour 19
6.1.2 Role of bulk carbon 19
6.1.3 Role of surface carbon 21
6.1.4 Effect of pretreatment 22
6.2 Selectivity 24
6.2.1 Influence of operating conditions 25
6.2.2 Effect of carbide formation 26
6.2.3 Effect of particle size 27
7 Promotion of iron catalysts 27
7.1 Effect of Promoters on Activity 27
7.2 Effect of Promoters on Selectivity 28
7.3 Mechanisms of Promoter Action 29
8 Basis for Future Research 31
9 Summary of Findings 32
10 Summary of Recommendations for Future Research 33
11 References 34