Citation: WANG Yu-rong, WANG Shu-rong, WANG Xiang-yu, GUO Zuo-gang. Molecular distillation separation characteristic of bio-oil under different pressures[J]. Journal of Fuel Chemistry and Technology, ;2013, 41(2): 177-182. shu

Molecular distillation separation characteristic of bio-oil under different pressures

1.
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China

Corresponding author: WANG Shu-rong,
Received Date: 12 June 2012
Available Online: 6 August 2012
Fund Project: 国家自然科学基金(51276166) (51276166) "十二五"国家科技支撑计划(2011BAD22B07) (2011BAD22B07) 浙江省杰出青年科学基金(R1110089) (R1110089) 新世纪优秀人才支持计划(NCET-10-0741) (NCET-10-0741) 浙江省重点科技创新团队计划(2009R50012)。 (2009R50012)

The separation properties of sensitive bio-oil using molecular distillation technology were investigated under different distillation pressures. Crude bio-oil is divided into distillate fraction and residual fraction after the molecular distillation process. The yield of distillate fraction increases obviously with the decline of pressure, which achieves the highest value of 56.50% under 700Pa. Most of water is enriched in the distillate fraction while water in residual fractions is effectively removed; water content in the residual fraction under 700Pa is reduced to 4.20%. The distribution of some typical compounds, including acetic acid, phenol, furfural, levoglucosan, etc, under different distillation pressures was studied and the separation characteristic of these typical compounds was obtained; based on that, a separation factor model was proposed and a quantitative evaluation was made on the enrichment behaviors of 14 compounds in bio-oil.
- bio-oil,
- molecular distillation,
- separation properties,
- distillation pressure
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