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See also -  Hot Coal Gas Desulfurization With Manganese-Based Sorbents. Final Report. September 1992 - December 1994 - 1994

Kinetics of Mn-Based Sorbents for Hot Coal Gas Desulfurization. 
Final Technical Report.  09/15/1994 09/15/1997

Hepworth, M. T.
Berns, J. J.
Sadecki, K. A.

University of Minnesota

In this pdf format, this document has 123 pages and is 511.85 KB.

Table of Contents

Executive Summary

1

1.

Chapter 1:  Introduction

2

1.1

Introduction

2

1.2

Objectives

2

2.

Chapter 2:  Literature Review

4

2.1

Introduction

4

2.2

Coal Characteristics

4

2.3

Emerging Technologies for Coal Utilization

5

2.3.1

Integrated Gasification Combined Cycle (IGCC)

5

2.3.2

Coal Gasification

6

2.4

Hot Gas Desulfurization

7

2.5

High Temperature Sorbents

8

2.5.1

Zinc-Based Sorbents

8

2.5.2

Manganese-Based Sorbents

8

2.6

Cold Versus Hot Sulfur Clean-Up

8

2.7

Regeneration

9

2.8

References

11

3.

Chapter 3:  Thermodynamic Considerations

15

3.1

Introduction

15

3.2

Sulfidation Thermodynamics

15

3.3

Regeneration Thermodynamics

20

3.4

References

23

4.

Chapter 4:  Kinetic Considerations

24

4.1

Introduction

24

4.2

Single Pellet Modeling:  The Shrinking Core Model

24

4.2.1

Diffusion Through Gas Film Controls

25

4.2.2

Diffusion Through Product Layer Controls

27

4.2.3

Chemical Reaction Controls

29

4.3

Comparison of Models for Gas-Solid Reactions

30

4.4

Fixed-Bed Modeling

31

4.5

References

34

5.

 

Chapter 5:  Experimental Procedure

35

5.1

Pellet Manufacture

35

5.1.1

Feed Materials

35

5.1.2

Formula Designations

36

5.1.3

Preparation

37

5.2

Pellet Characterization

37

5.2.1

Thermogravimetric Analysis (TGA)

37

5.2.2

Fixed-Bed Testing

38

5.2.3

Strength Testing

42

5.2.4

X-Ray Diffraction (XRD)

42

5.2.5

Manganese Analysis

43

5.2.6

Sulfur Analysis

43

5.2.7

Pore Structure Analysis

43

6.

Chapter 6:  Results

44

6.1

Introduction

44

6.2

TGA Results

44

6.3

Fixed-Bed Testing

45

6.3.1

Sulfidation

46

6.3.2

Regeneration

50

6.3.3

Effects of Varying Sulfidation Conditions

53

6.4

Fixed-Bed Modeling

54

6.5

Sulfur Analysis

57

6.6

Strength Testing

58

6.7

X-Ray Diffraction (XRD)

59

6.8

Pore Structure Analysis

60

6.9

References

61

7.

Chapter 7:  Conclusions

116

8.

Notation

118