| Literature DB >> 26378960 |
Rundong Li1, Bingshuo Li2, Tianhua Yang3, Xingping Kai3, Weidan Wang3, Yefei Jie3, Yang Zhang3, Guanyi Chen2.
Abstract
The effect of solvents (water and ethanol) on liquefaction characteristics of rice stalk (RS) was investigated in an autoclave. The highest conversion and liquid yield in water and ethanol were 84.95 wt%, 72.62 wt% and 78.93wt%, 63.84 wt%, respectively. FTIR and GC-MS of the bio-oils obtained from subcritical water (SubH2O, 300°C) and supercritical ethanol (scEtOH, 300°C) indicated that the behavior of RS liquefaction depended on solvents used. The major components of bio-oil produced in SubH2O were ketones and phenols, while esters and phenols dominated in scEtOH. ICP-OES analysis showed that the concentrations of potassium (K) and sodium (Na) in the bio-oil obtained from scEtOH were 14-15 times higher than that obtained from SubH2O. Ethanol gave rise to an improvement in the bio-oil properties including water content, density, acidity and HHV. It was concluded that the bio-oil from RS can be effectively upgraded in scEtOH.Entities:
Keywords: Bio-oil; Rice stalk; Solvents; Sub/supercritical liquefaction
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Year: 2015 PMID： 26378960 DOI： 10.1016/j.biortech.2015.08.088
Source DB: PubMed Journal: Bioresour Technol ISSN： 0960-8524 Impact factor: 9.642