Biodiesel from Citrullus colocynthis Oil: Sulfonic-Ionic Liquid-Catalyzed Esterification of a Two-Step Process

被引：4
作者：
Elsheikh, Yasir Ali [1 ]
Akhtar, Faheem Hassan [1 ]
机构：
[1] King Abdulaziz Univ, Dept Chem & Mat Engn, POB 344, Rabigh, Saudi Arabia
来源：
SCIENTIFIC WORLD JOURNAL | 2014年
关键词：
WASTE COOKING OIL; VEGETABLE-OILS; SOYBEAN OIL; SEED OIL; TRANSESTERIFICATION; OPTIMIZATION; FEEDSTOCK; ESTERS;
D O I：
10.1155/2014/540765
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Biodiesel was prepared from Citrullus colocynthis oil (CCO) via a two-step process. The first esterification step was explored in two ionic liquids (ILs) with 1,3-disulfonic acid imidazolium hydrogen sulfate (DSIMHSO4) and 3-methyl-1-sulfonic acid imidazolium hydrogen sulfate (MSIMHSO4). Both ILs appeared to be good candidates to replace hazardous acidic catalyst due to their exceptional properties. However, the two sulfonic chains existing in DSIMHSO4 were found to increase the acidity to the IL than the single sulfonic chain in MSIMHSO4. Based on the results, 3.6 wt% of DSIMHSO4, methanol/CCO molar ratio of 12:1, and 150 degrees C offered a final FFA conversion of 95.4% within 105 min. A 98.2% was produced via second KOH-catalyzed step in 1.0%, 6:1 molar ratio, 600 rpm, and 60 degrees C for 50 min. This new two-step catalyzed process could solve the corrosion and environmental problems associated with the current acidic catalysts.
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页数：11
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