Abstract
Pyrolysis of lignocellulosic biomass is a promising method to produce bio-oils in high yields. However, the obtained bio-oils via the pyrolysis process always contain large amounts of oxygenated compounds such as phenols, ketones sugars and acids, which could make them unstable, corrosive and have low heating value. Thus, the original bio-oils need to be firstly upgraded before its application as transportation fuel. Herein, upgrading of bio-oils by using several typically highly-active solid catalysts with metal modification are introduced. Especially, the effects of pore size and acidic-basic properties of the solid catalysts on their activity, selectivity, stability and deactivation are critically reviewed. In this chapter, fundamental reaction pathways for the conversion of oxygenated compounds into aromatic hydrocarbons and coke via catalytic pyrolysis are summarized in detail along with an outline of future research needs.KeywordsBiomassBio-oilSolid catalystsReaction pathwaysAromatic hydrocarbons
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