Biomass Gasification, Pyrolysis, and Torrefaction: Practical Design, Theory, and Climate Change Mitigation, Fourth Edition explores the role of biomass conversion in climate change mitigation. With a focus on design, analysis and operational aspects of biomass gasification, pyrolysis and torrefaction, this edition offers comprehensive coverage of biomass in its gas, liquid and solid states. Processing and cleaning of product gas in gasification is considered, as are biomaterials and their development, making this a versatile resource that not only explains the basic principles of energy conversion systems, but also provides valuable insights into the design of a complete biomass conversion systems. For the first time, hydrogen production for fuel cells applications is addressed, reflecting the expanding role of hydrogen as a fuel source. Although the book carries the name 'biomass', the bulk of its content is also applicable to non-biomass fuels like coal, petcoke, municipal solid waste and others. This book will allow professionals, such as engineers, scientists, and operating personnel of biomass gasification, pyrolysis or torrefaction plants, to gain a better comprehension of biomass conversion. - Features updates with the most recent research and technology - Includes a dedicated chapter on hydrogen production for fuel cell application - Explores the application of biomass conversion in climate change mitigation and sustainable development - Contains updated step-by-step process flow diagrams, design data, conversion charts and numerical examples with solutions - Provides available research results in an easy-to-use design methodology - Spotlights advanced processes such as supercritical water gasification and torrefaction of biomass - Examines the economic aspects of biomass conversion, including ecological economics and the circular economy for sustainable development