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Bulletin 612

Carbides, Nitrides, and the Carbonitrides of Iron as Catalysts in the Fischer-Tropsch Synthesis

Shultz, J.F.
Hofer, L.J.E.
Stein, K.C.
Anderson, R.B.

In the pdf format this document has 74 pages
1-19 1085kb 40-59 1450kb
20-39 1367kb 60-74 991kb

Contents

Page

Summary

1

Introduction

4

Preparation of carbides, nitrides, and carbonitrides of iron in catalytic form

5

Synthesis tests with carbides of iron

7

Fused-iron oxide catalysts converted to Hägg carbide

7

Synthesis with fused-iron oxide catalysts converted to cementite

18

Thermomagnetic analyses of fused-iron oxide catalysts

23

Synthesis tests of carburized precipitated-iron catalysts

25

Synthesis tests with nitrides and carbonitrides of iron

28

Composition changes of e-iron nitrides during synthesis

28

Activity, selectivity, and composition changes of partly nitrided catalysts

33

Synthesis tests with iron catalysts converted to e-iron carbonitrides

36

Exploratory studies on preparation of iron borides

41

Structural and chemical changes in catalysts during pretreatment and synthesis

43

Structural changes in reduced-iron catalysts on formation of oxide and interstitial phases

43

Structural changes of iron catalysts during pretreatment and synthesis

47

Electron and X-ray-diffraction studies of iron Fischer-Tropsch catalysts

53

Bibliography

62

Appendix A - Preparation and composition of catalysts

65

Appendix B - Testing procedures

66

Appendix C - Separation of carbon monoxide from synthesis gas

67

Appendix D - Constant liquid feed system

69