Optimization of recovery of silica from sugarcane leaf ash and Ca/SBA-15 solid base for transesterification of Calophyllum inophyllum oil

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• 作者：A. Arumugam ; V. Ponnusami
• 关键词：Mesoporous silica ; Sugarcane leaf ash ; Response surface methodology
• 刊名：Journal of Sol-Gel Science and Technology
• 出版年：2015
• 出版时间：April 2015
• 年：2015
• 卷：74
• 期：1
• 页码：132-142
• 全文大小：1,077 KB
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• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Ceramics,Glass,Composites,Natural Materials
  Inorganic Chemistry
  Optical and Electronic Materials
  Nanotechnology
  
• 出版者：Springer Netherlands
• ISSN：1573-4846

文摘

Highly ordered mesoporous material Santa Barbara acid-15 (SBA-15) was obtained from sugarcane leaf ash, a low cost silica source. It is highly critical today to use an inexpensive and non-toxic silica source for SBA-15 production. The objectives of the this study were to (1) investigate the relationship between the time of sonication (t), amount of sodium hydroxide used (WR) and temperature (T) maintained using response surface methodology and obtain maximum percentage recovery of silica, (2) to synthesis SBA-15 from recovered silica (water glass), (3) to produce biodiesel from Calophyllum inophyllum oil using methanol as alcohol under heterogeneous catalysis. The catalyst medium was a calcium acetate impregnated silicate mesoporous material called SBA-15. The optimum conditions for maximum recovery of SiO2 (57.99?%) were found to be: reaction temperature-10?°C, NaOH to ash weight ratio-:3 and sonication reaction time-?h. The transesterification reaction was conducted with different methanol to oil ratios (3:1, 8:1, 12:1, 16:1, 18:1) at different temperatures such as 50, 60, 70, 80 and 90?°C in the presence of heterogeneous catalyst. The maximum yield of 88.77?% at 16:1 alcohol to oil ratio (molar) and 96.82?% at the temperature of 80?°C was obtained.