A review on catalytic & non-catalytic bio-oil upgrading in supercritical fluids
作者机构：Chemical Engineering and Applied ChemistryAston UniversityBirminghamB47ETUK
出 版 物：《Frontiers of Chemical Science and Engineering》 (化学科学与工程前沿（英文版）)
年 卷 期：2021年第15卷第1期
页 面：4-17页
核心收录：
学科分类：07[理学] 070304[理学-物理化学(含∶化学物理)] 0817[工学-化学工程与技术] 0703[理学-化学]
主 题：bio-oil upgrading supercritical review
摘 要：This review article summarizes the key published research on the topic of bio-oil upgrading using catalytic and non-catalytic supercritical fluid(SCF)conditions.The precious metal catalysts Pd,Ru and Pt on various supports are frequently chosen for catalytic bio-oil upgrading in SCFs.This is reportedly due to their favourable catalytic activity during the process including hydrotreating,hydrocracking,and esterification,which leads to improvements in liquid yield,heating value,and pH of the upgraded bio-oil.Due to the costs associated with precious metal catalysts,some researchers have opted for non-precious metal catalysts such as acidic HZSM-5 which can promote esterification in supercritical ethanol.On the other hand,SCFs have been effectively used to upgrade crude bio-oil without a catalyst.Supercritical methanol,ethanol,and water are most commonly used and demonstrate catalyst like activities such as facilitating esterification reactions and reducing solid yield by alcoholysis and hydrolysis,respectively.
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