title: Catalytic upgrading of bio-oil by HZSM-5 in sub- and super-critical ethanol.
abstract: The pyrolysis bio-oil from rice husk was upgraded in sub- and super-critical ethanol using HZSM-5 as catalyst. The results showed that super-critical upgrading process performed more effectively than sub-critical upgrading process. Acidic HZSM-5 facilitates esterification in super-critical ethanol to convert acids contained in crude bio-oil into various kinds of esters. Stronger acidic HZSM-5 (low Si/Al ratio) can facilitate cracking of heavy components of crude bio-oil more effectively in super-critical upgrading process. The residue of distillated upgraded bio-oil from super-critical upgrading process decreased evidently, compared with that of distillated crude bio-oil. This work proved that crude bio-oil can be effectively upgraded in super-critical upgrading process with the aid of acidic catalyst.
authors.affiliation: Department of Chemistry, Institute of Catalysis, Zhejiang University, Hangzhou, Zhejiang, PR China.
authors.forename: Jun
authors.initials: J
authors.lastname: Peng
authors.forename: Ping
authors.initials: P
authors.lastname: Chen
authors.forename: Hui
authors.initials: H
authors.lastname: Lou
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Zheng
mesh_terms: D001674:Bioelectric Energy Sources; D018533:Biomass; D019149:Bioreactors; D001709:Biotechnology / Q000379:methods*; D002384:Catalysis; D004736:Energy-Generating Resources; D004867:Equipment Design; D000431:Ethanol / Q000737:chemistry* / Q000302:isolation & purification*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D012275:Oryza / Q000378:metabolism; D010938:Plant Oils / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry
chemical_list: D010938:Plant Oils; D012997:Solvents; D000431:Ethanol