Upgrading of bio-oil over aluminum silicate in supercritical ethanol

被引：82
|
作者：
Peng, Jun [1 ]
Chen, Ping [1 ]
Lou, Hui [1 ]
Zheng, Xiaoming [1 ]
机构：
[1] Zhejiang Univ, Dept Chem, Inst Catalysis, Hangzhou 310028, Zhejiang, Peoples R China
来源：
ENERGY & FUELS | 2008年 / 22卷 / 05期
关键词：
D O I：
10.1021/ef8001789
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
The crude bio-oil from fast pyrolysis of rice husk was upgraded in supercritical ethanol using aluminum silicate as a catalyst. The results showed that the supercritical upgrading process performed effectively and the components of upgraded bio-oil were optimized greatly. Acidic aluminum silicate facilitates esterification in supercritical ethanol to convert most acids contained in crude bio-oil into various kinds of esters. The amount of phenols that exist extensively in crude bio-oil decreased during the supercritical upgrading process. Aldehydes, such as furfural and vanillin, which are typically present in crude bio-oil, were removed during the supercritical upgrading process and not detected in upgraded bio-oil. The residue of distillated upgraded bio-oil decreased evidently compared to that of distillated crude bio-oil. The density and kinematical viscosity of upgraded bio-oil decreased compared to that of crude bio-oil. The pH value and heating value of upgraded bio-oil increased compared to that of crude bio-oil. The changes of these properties showed that the quality of upgraded bio-oil was improved.
引用
收藏
页码：3489 / 3492
页数：4
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