A highly active bagasse-derived solid acid catalyst with properties suitable for production of biodiesel.
A novel bagasse-based solid acid catalyst was successfully prepared through sulfonation of incompletely carbonized bagasse. A range of conditions for producing the catalyst were investigated, and the optimized catalyst, produced under carbonization at 648 K for 0.5 h and sulfonation at 423 K for 15 h, showed excellent catalytic activity and resulted in around 95 % yield of methyl oleate. Its activity was not only substantially greater than that of niobic acid and Amberlyst-15, but also comparable to or superior to that of catalysts made from pure starch or glucose, respectively. Additionally, the bagasse-derived catalyst could be repeatedly employed for at least eight cycles and still retained around 90 % of its original activity, exhibiting excellent operational stability. Furthermore, the catalyst efficiently converted waste cooking oils with 38.6 wt % free fatty acids into biodiesel and afforded a high yield of about 93.8 % within 12 h. These results clearly show that the bagasse-derived catalyst is economic, eco-friendly, and promising for biodiesel production from low-cost feedstocks and may find wide applications.
Laboratory of Applied Biocatalysis, South China University of Technology, 381 Wushan Street, Guangzhou 510640, PR China. wylou@scut.edu.cn
Wen-Yong
WY
Lou
Qiang
Q
Guo
Wen-Jing
WJ
Chen
Min-Hua
MH
Zong
Hong
H
Wu
Thomas J
TJ
Smith
D000143:Acids / Q000737:chemistry; D056804:Biofuels; D002384:Catalysis; D002482:Cellulose / Q000737:chemistry*; D005230:Fatty Acids, Nonesterified / Q000737:chemistry; D009821:Oils / Q000737:chemistry; D013329:Structure-Activity Relationship; D014865:Waste Disposal, Fluid
D000143:Acids; D056804:Biofuels; D005230:Fatty Acids, Nonesterified; D009821:Oils; D002482:Cellulose; C027433:bagasse