Page 154 - New Trends In Coal Conversion

Coal and biomass cofiring: 5

fundamentals and future trends

María V. Gil, Fernando Rubiera
Instituto Nacional del Carb on, INCAR-CSIC, Oviedo, Spain

Chapter Outline

5.1 Introduction 117
5.2 Biomass characterization and properties 119
5.2.1 Chemical properties 120
5.2.2 Thermochemical properties 120
5.3 Coal and biomass cofiring technologies 121
5.3.1 Direct cofiring 121
5.3.2 Indirect cofiring 122
5.3.3 Parallel cofiring 122
5.4 Cofiring ratios 123
5.5 Technical and logistical issues of cofiring 123
5.5.1 Biomass type and availability 123
5.5.2 Biomass pretreatment 124
5.5.3 Biomass burning 127
5.5.3.1 Fuel conversion 127
5.5.3.2 Deposits and corrosion 128
5.5.3.3 Combustion modeling 128
5.5.4 Cofiring boiler types 129
5.6 Environmental issues: flue gas and ash from cofiring 132
5.6.1 CO 2 emissions 133
5.6.2 NO x and SO x emissions 133
5.6.3 Ash 134
5.7 Oxy-fuel cofiring 134
5.8 Future trends of biomass cofiring 135
5.9 Concluding remarks 137
Acknowledgments 137
References 137

5.1 Introduction

According to the Technology Roadmap on Delivering Sustainable Bioenergy of the
International Energy Agency (IEA), the current rate of bioenergy deployment is

New Trends in Coal Conversion. https://doi.org/10.1016/B978-0-08-102201-6.00005-4
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