List of Figures

i

1.0

Introduction

1

2.0

Objectives

1

2.1

Alkali Sorbents

2

2.2

Catalytic Tar Cracking

2

3.0

Accomplishments

3

3.1

Capture of Alkali During PFBC Using In-Bed Sorbents

3

3.1.1

Research Outline

3

3.1.2

Conclusions and Recommendations

4

3.1.2.1

Conclusions from Literature Review

5

3.1.2.2

Conclusions from TGA Screening Tests

6

3.1.2.3

Conclusions from Bench-Scale Testing

6

3.1.2.3.1

General Observations from the Use of Alkali Sorbents

6

3.1.2.3.2

Impacts of Sorbents on Ash Distribution

6

3.1.2.3.3

Impacts of Sorbents on Vapor-Phase Alkali Concentration

7

3.1.2.3.4

Impacts of Sorbents on Ash Deposition

7

3.1.2.3.5

Impacts of Sorbents on Filter Performance

8

3.2

Catalytic Tar Cracking

10

3.2.1

Experimental

10

3.2.1.1

Integrated Bench-Scale Gasifier

10

3.2.1.2

Gasification Tests

10

3.2.2

Results

10

3.2.3

Conclusions

11

3.2.4

Recommendations

11

Appendix  - A

Capture of Alkali During Pressurized Fluidized-Bed Combustion Using In-Bed Sorbents