title: Silica-bonded N-propyl sulfamic acid used as a heterogeneous catalyst for transesterification of soybean oil with methanol.
abstract: The transesterification of soybean oil with methanol was carried out, to produce biodiesel, over silica-bonded N-propyl sulfamic acid in a heterogeneous manner. Results showed that a maximum conversion of 90.5% was achieved using a 1:20 M ratio of soybean oil to methanol and a catalyst amount of 7.5 wt.% at 423 K for 60 h. It was found that the free fatty acid (FFA) and water present in the feedstock had no significant influence on the catalytic activity to the transesterification reaction. Besides, the catalyst also showed activities towards the esterification reaction of FFAs, in terms of the FFA conversion of 95.6% at 423 K for 30 h. Furthermore, the catalyst could be recovered with a better reusability.
authors.affiliation: School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450052, PR China. xwenlei@163.com
authors.forename: Wenlei
authors.initials: W
authors.lastname: Xie
authors.forename: Dong
authors.initials: D
authors.lastname: Yang
mesh_terms: D002384:Catalysis; D004951:Esterification; D005230:Fatty Acids, Nonesterified / Q000737:chemistry; D000432:Methanol / Q000737:chemistry*; D012822:Silicon Dioxide; D013024:Soybean Oil / Q000737:chemistry*; D013451:Sulfonic Acids / Q000737:chemistry*
chemical_list: D005230:Fatty Acids, Nonesterified; D013451:Sulfonic Acids; D012822:Silicon Dioxide; D013024:Soybean Oil; C005741:sulfamic acid; D000432:Methanol