Chapter 1 Introduction
1��1 Brief Review of Coal-fired Flue Gas DesuIfuriz
1��2 The desulfurization technology
1��3 Extraction methods of HA

Chapter 2 Extraction of Humic Acid from Lignite
2��1 Introduction
2��2 Experimental method and materials
2��3 Results and discussion
2��4 Conclusions

Chapter 3 Flue Gas Desulfurization Performance of Lignite-based Potassium Humate
3��1 Introduction
3��2 Experimental method and materials
3��3 Results and discussion
3��4 Conclusions

Chapter 4 Preparation of Lignite-based Activated Carbon and its Flue Gas DesulfurizatiOn Performance
4��1 Introduction
4��2 Experiments
4��3 Preparation and Characterization of AC
4��4 Desulfurization performance of the prepared ACs
4��5 Conclusions

Chapter 5 Summary and Expectation
5��1 Summary
5��2 Expectation
References