Semnan University Press Applied Chemistry Today 2981-2437 8 29 2013 12 22 Synthesis of biodiesel using KOH/Borax as suitable mixed catalyst via transesterification of waste sesame oil Synthesis of biodiesel using KOH/Borax as suitable mixed catalyst via transesterification of waste sesame oil 15 18 2457 10.22075/chem.2013.2457 FA Sahar Belyani Department of chemistry, Semnan University, Semnan, Iran Mahdi Behzad Department of chemistry, Semnan University, Semnan, Iran Fatemeh Tamaddon Department of chemistry, Yazd University, Yazd, Iran Journal Article 2017 05 24 The catalytic activity of KOH/borax as homogeneous mixed catalyst was evaluated for the synthesis of biodiesel via transesterification of sesame oil extracted from waste sesame seeds with n-hexane. The effects of catalyst loading, methanol to oil ratio, temperature and reaction time in transesterification were investigated. The highest yield of 87% for biodiesel production was obtained at optimized conditions including 0.4 wt.% KOH and 10 wt.% Na2B4O7.10H2O of mixed catalyst loadings, methanol to oil molar ratio of 8:1, reaction time of 2.5 h and reaction temperature of 65 ˚C. The catalytic activity of KOH/borax as homogeneous mixed catalyst was evaluated for the synthesis of biodiesel via transesterification of sesame oil extracted from waste sesame seeds with n-hexane. The effects of catalyst loading, methanol to oil ratio, temperature and reaction time in transesterification were investigated. The highest yield of 87% for biodiesel production was obtained at optimized conditions including 0.4 wt.% KOH and 10 wt.% Na2B4O7.10H2O of mixed catalyst loadings, methanol to oil molar ratio of 8:1, reaction time of 2.5 h and reaction temperature of 65 ˚C. https://chemistry.semnan.ac.ir/article_2457_45179cbb6a6b736a8a95e998d3bf9643.pdf