Direct production of biodiesel from high-acid value Jatropha oil with solid acid catalyst derived from lignin

Biotechnology for Biofuels

Fei-ling Pua²  Zhen Fang¹  Sarani Zakaria²  Feng Guo¹  Chin-hua Chia² 

[1] Chinese Academy of Sciences, Biomass Group, Laboratory of Tropical Plant Resource Science, Xishuangbanna Tropical Botanical Garden, 88 Xuefulu, Kunming, Yunnan Province 650223, China

[2] Universiti Kebangsaan Malaysia, School of Applied Physics, Faculty of Science and Technology, 43600 Bangi, Selangor, Malaysia

关键词: solid acid catalyst;    Jatropha oil;    Kraft lignin;    biodiesel;   

Others  :  798364
DOI  :  10.1186/1754-6834-4-56

 received in 2011-05-06, accepted in 2011-12-07,  发布年份 2011

【 摘 要 】

Background

Solid acid catalyst was prepared from Kraft lignin by chemical activation with phosphoric acid, pyrolysis and sulfuric acid. This catalyst had high acid density as characterized by scanning electron microscope (SEM), energy-dispersive x-ray spectrometry (EDX) and Brunauer, Emmett, and Teller (BET) method analyses. It was further used to catalyze the esterification of oleic acid and one-step conversion of non-pretreated Jatropha oil to biodiesel. The effects of catalyst loading, reaction temperature and oil-to-methanol molar ratio, on the catalytic activity of the esterification were investigated.

Results

The highest catalytic activity was achieved with a 96.1% esterification rate, and the catalyst can be reused three times with little deactivation under optimized conditions. Biodiesel production from Jatropha oil was studied under such conditions. It was found that 96.3% biodiesel yield from non-pretreated Jatropha oil with high-acid value (12.7 mg KOH/g) could be achieved.

Conclusions

The catalyst can be easily separated for reuse. This single-step process could be a potential route for biodiesel production from high-acid value oil by simplifying the procedure and reducing costs.

【 授权许可】

   
2011 Pua et al; licensee BioMed Central Ltd.

【 图 表 】

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