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Ultrasonic-assisted biodiesel production process from palm oil using alkaline earth metal oxides as the heterogeneous catalysts
被引:234
作者:

Mootabadi, Hamed
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机构:
Univ Sains Malaysia, Sch Chem Engn, Nibong Tebal 14300, Penang, Malaysia Univ Sains Malaysia, Sch Chem Engn, Nibong Tebal 14300, Penang, Malaysia

Salamatinia, Babak
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Univ Sains Malaysia, Sch Chem Engn, Nibong Tebal 14300, Penang, Malaysia Univ Sains Malaysia, Sch Chem Engn, Nibong Tebal 14300, Penang, Malaysia

Bhatia, Subhash
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Univ Sains Malaysia, Sch Chem Engn, Nibong Tebal 14300, Penang, Malaysia Univ Sains Malaysia, Sch Chem Engn, Nibong Tebal 14300, Penang, Malaysia

Abdullah, Ahmad Zuhairi
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Univ Sains Malaysia, Sch Chem Engn, Nibong Tebal 14300, Penang, Malaysia Univ Sains Malaysia, Sch Chem Engn, Nibong Tebal 14300, Penang, Malaysia
机构:
[1] Univ Sains Malaysia, Sch Chem Engn, Nibong Tebal 14300, Penang, Malaysia
来源:
关键词:
Ultrasonic-assisted transesterification;
Biodiesel;
Heterogeneous catalyst;
Intensification;
SOLID-BASE CATALYST;
SOYBEAN OIL;
CALCIUM-OXIDE;
TRANSESTERIFICATION;
ALUMINA;
D O I:
10.1016/j.fuel.2009.12.023
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 ultrasonic-assisted transesterification of palm oil in the presence of alkaline earth metal oxide catalysts (CaO, SrO and BaO) was investigated. Batch process assisted by 20 kHz ultrasonic cavitation was carried out to study the effect of reaction time (10-60 min), alcohol to palm oil molar ratio (3: 1-15 :1), catalysts loading (0.5-3%) and varying of ultrasonic amplitudes (25-100%). The activities of the catalysts were mainly related to their basic strength. The catalytic activity was in the sequence of CaO < SrO < BaO. At optimum conditions, 60 min was required to achieve 95% yield compared to 2-4 h with conventional stirring. Also, the yields achieved in 60 min increased from 5.5% to 77.3% (CaO), 48.2% to 95.2% (SrO), and 67.3% to 95.2 (BaO). Fifty percentage amplitude of ultrasonic irradiation was deemed the most suitable value and physical changes on the catalysts after the ultrasonic-assisted reaction were successfully elucidated. BaO catalyst underwent relatively more severe activity drop in the catalyst reusability test. Catalysts dissolution was found to be mainly responsible for activity drop of the reused catalysts, especially with BaO catalyst. (C) 2010 Elsevier Ltd. All rights reserved.
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页码:1818 / 1825
页数:8
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