From biomass to SNG

This chapter presents a brief description of the main bio-substitute natural gas (SNG) facilities and projects in Europe as well as the main process units (gasification, gas cleaning and methanation) integrated for bio-SNG production. It models a case study for bio-SNG production by using the CHEMCAD 6.3.1.4168 software. The chapter discusses two process technologies, a fixed (adiabatic case) or fluidized (isothermal) bed methanation reactors, while three different product gas compositions from "real" biomass gasification data are fed as input syngas for the modeled system. Finally, it compares and discusses CH4 yield and chemical efficiency of the different cases