期刊
BIORESOURCE TECHNOLOGY
卷 102, 期 3, 页码 3607-3609出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2010.10.115
关键词
NKC-9 cation-exchange resin; Biodiesel; Continuous esterification; Fixed bed reactor; Heterogeneous catalyst
资金
- National High Technology Research and Development Program of China [2009AA032223]
- Tianjin Natural Science Foundation [08JCYBJC26400, 08JCZDJC24000]
Continuous esterification of free fatty acids (FFA) from acidified oil with methanol was carried out with NKC-9 cation-exchange resin in a fixed bed reactor with an internal diameter of 25 mm and a height of 450 mm to produce biodiesel. The results showed that the FFA conversion increased with increases in methanol/oil mass ratio, reaction temperature and catalyst bed height, whereas decreased with increases in initial water content in feedstock and feed flow rate. The FFA conversion kept over 98.0% during 500 h of continuous esterification processes under 2.8:1 methanol to oleic acid mass ratio, 44.0 cm catalyst bed height, 0.62 ml/min feed flow rate and 65 degrees C reaction temperature, showing a much high conversion and operational stability. Furthermore, the loss of sulfonic acid groups from NKC-9 resin into the production was not found during continuous esterification. In sum, NKC-9 resin shows the potential commercial applications to esterification of FFA. (C) 2010 Elsevier Ltd. All rights reserved.
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