Wim van Swaaij studied chemical engineering sciences and obtained his PhD at the Technical University in Eindhoven, the Netherlands. He has over 40 years of experience in industrial and academic R&D on processes including biomass conversion. He is a consultant for several multinational firms such as Shell, DSM, Solvay Duphar, and BASF. He is a member of the Royal Netherlands Academy of Sciences. His awards and honors include the "Grand Prix du Génie des Procédés" of the French Academy of Sciences; doctor honoris causa by the Université de Nancy, France; the Royal Dutch Shell Prize; and the Golden Tesla medal for energy research. He is Knight in the Order of the Netherlands Lion. Sascha Kersten obtained his MSc in chemical engineering from the University of Amsterdam, the Netherlands, and a PhD on biomass gasification in circulating fluidized beds from the University of Twente under the guidance of Prof. Van Swaaij. He began his career at the Energy Research Centre of the Netherlands, where he worked on modeling of dynamic systems and later on biomass conversions. Since 2003 he has been working at the University of Twente and is currently the chair of the Sustainable Process Technology Group of the university. He is working on energy-efficient separations, CO2 capture and utilization, water purification, recovery/recycling of scarce elements, and thermochemical conversions of biomass into fuels, chemicals, and materials. Wolfgang Palz holds a PhD in physics from the University of Karlsruhe, Germany. He is bearer of an Order of Merit of Germany (Bundesverdienstkreuz), has been recognized as a wind energy pioneer in Britain, and has received several European prizes for biomass, wind energy, and solar photovoltaics, including the Swiss Solar Prize, together with the pioneers B. Piccard and A. Borschberg, the pilots of the airplane Solar Impulse, and the ISES Advancing Solar Energy Policy Award. He is author of the book Solar Electricity, which was published by UNESCO in seven languages, and editor of Pan Stanford Publishing’s book series Power for the World.