Process Optimization of Wood Particles Microwave Pyrolysis with Combined Production of Bio-Oil and Syngas

Abstract

IntroductionThe depletion of crude oil resources draws great research attention on renewable energy. Biomass is an alternative energy source because of low sulfur content renewability, and the capability of being converted into bio-fuels, materials or gases with zero carbon footprints. In recent years, significant progress has been made in the development of hydrotreating bio-oil 1 , which enable the bio-oil to replace crude oil products. Moreover, the research on high efficiency catalyst is used for the hydrolysis of lignocellulosic biomass, which also has potential in the field of renewable chemical feedstock 2 . However, in addition to environmental pollution, the applications of traditional heating pyrolyzing method have problems on low utilization, slow heating speed and non-uniform heating, which affect the quality of products significantly.Pretreatment has significant role in the conversion of biomass. Structurally, the bottleneck in biomass pyrolysis is mainly due to lignin seals and crystalline nature of cellulose. At present, a large number of pretreatment methods including physical pretreatment, chemical pretreatment, physiochemical pretreatment and biological pretreatment are available, all of which aim at eliminating lignin seals and