Transesterification of vegetable oils over a phosphazenium hydroxide catalyst incorporated onto silica |
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Authors: | Mi Jin KimMi-Young Kim O Zoon KwonGon Seo |
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Affiliation: | a School of Applied Chemical Engineering and the Research Institute for Catalysis, Chonnam National University, Yungbong-Dong, Buk-Gu, Gwangju 500-757, Republic of Koreab Chon Kun Dang Pharm, Cheonan P.O Box 74, Cheonan 330-831, Republic of Korea |
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Abstract: | The catalytic activity of a phosphazenium hydroxide (PzOH) catalyst incorporated onto silica (PzOH/SiO2) was investigated in the transesterification of vegetable oils with methanol. The PzOH stably incorporated onto silica (SiO2) maintained its basicity and converted methanol molecules to methoxide ions. The PzOH/SiO2 catalyst exhibited high activity in the transesterification of palm, corn, grape seed, and soybean oils (S-oil) with methanol, achieving ~ 90% conversion at 75 °C with a catalyst loading of 0.2 g per 4.8 ml of S-oil. Although the accumulation of organic materials on PzOH/SiO2 reduced its activity, this accumulation was effectively removed by washing with methanol. The high activity of PzOH/SiO2 was responsible for its strong basicity and for the free mobility of the PzOH moiety. |
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Keywords: | Transesterification Incorporated phosphazenium hydroxide Silica Vegetable oil Soybean oil |
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