Stability mechanism investigation of emulsion fuels from biomass pyrolysis oil and diesel

被引：58

作者：

Guo, Zuogang ^{[1
,2
]}

Wang, Shurong ^{[2
]}

Wang, Xiangyu ^{[2
]}

机构：

[1] China Energy Engn Grp Co Ltd, Guang Dong Elect Power Design Inst, Guangzhou 510663, Guangdong, Peoples R China

[2] Zhejiang Univ, State Key Lab Clean Energy Utilizat, Hangzhou 310027, Zhejiang, Peoples R China

来源：

ENERGY | 2014年 / 66卷

基金：

国家高技术研究发展计划(863计划); 中国国家自然科学基金; 中国博士后科学基金;

关键词：

Biomass; Pyrolysis; Bio-oil; Molecular distillation; Emulsion fuels; BIO-OIL; MOLECULAR DISTILLATION; EMULSIFICATION; HYDROCARBONS; CONVERSION;

D O I：

10.1016/j.energy.2014.01.010

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In this paper, emulsion fuels from crude bio-oil and its molecular distillation fractions were prepared by single ultrasonic and ultrasonic-mechanical emulsification. The results showed that the emulsions from crude bio-oil and 0# diesel had the best stability, with a stability time of 31 days. The stability time of the bio-oil middle fraction emulsion was 216 min, while that of the bio-oil heavy fraction emulsion was as low as 14 min. The particle size distributions of the emulsions were analyzed by a Malvern particle size analyzer. Emulsion fuels made from crude bio-oil and the bio-oil middle fraction had a smaller droplet size of 8-60 nm. In contrast, the emulsion fuel from the alcohol-diluted bio-oil heavy fraction had much larger droplet size, reaching up to 6000 nm. Compared with single ultrasonic emulsification, ultrasonic-mechanical emulsification had positive effects on increasing the stability time of the crude bio-oil emulsion, but negative effects on the stability time of the bio-oil middle and heavy fraction emulsions. To explain the above differences, spherical shell mechanism models were proposed according to the composition properties of the crude bio-oil and its fractions. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：250 / 255

页数：6

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