Biomass gasification 1

This document discusses biomass gasification. It describes two main types of gasifiers - updraft and downdraft. Updraft gasifiers have fuel flowing downward and air/gas flowing upward, separating zones for drying, pyrolysis, combustion, and reduction. Downdraft gasifiers have fuel entering from the top and air/gas flowing downward, with pyrolysis above combustion which is above reduction. Biomass gasification converts biomass into a gaseous fuel through partial combustion and has advantages like utilizing waste and providing an alternative to fossil fuels while reducing emissions. However, it also has disadvantages like high capital costs and potential tar production.