title: Upgrading of low-boiling fraction of bio-oil in supercritical methanol and reaction network.
abstract: In this work, the low-boiling fraction (LBF) of bio-oil was used as feed stock. LBF is a very complex mixture, and the three groups in LBF: acids, aldehydes and phenols, are primarily responsible for deterioration in the quality. The upgrading reactions were carried out over Pt/Al(2)(SiO(3))(3), Pt/C or Pt/MgO in supercritical methanol. It is demonstrated that supercritical condition can greatly facilitate the esterification process, and after 6 h reaction, all the acids can be converted into esters even without adding any catalyst. The total amount of the three groups left in products was much less exhibited on Pt supported on active carbon and MgO in the presence of hydrogen. By investigating the model reactions, the relations between the representative compounds and major products were identified, and the conversion scheme of the upgrading reactions is proposed.
authors.affiliation: Institute of Catalysis, Department of Chemistry, Zhejiang University, 148 Tianmushan Road, Hangzhou 310028, PR China.
authors.forename: Wang
authors.initials: W
authors.lastname: Li
authors.forename: Chunyan
authors.initials: C
authors.lastname: Pan
authors.forename: Qijun
authors.initials: Q
authors.lastname: Zhang
authors.forename: Zhen
authors.initials: Z
authors.lastname: Liu
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: D056804:Biofuels / Q000032:analysis*; D002384:Catalysis; D004951:Esterification; D008401:Gas Chromatography-Mass Spectrometry; D000432:Methanol / Q000737:chemistry*; D008956:Models, Chemical; D010984:Platinum; D044366:Transition Temperature
chemical_list: D056804:Biofuels; D010984:Platinum; D000432:Methanol