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首页> 外文期刊>Renewable energy >Calcium diglyceroxide catalyzed biodiesel production from waste cooking oil in the presence of microwave: Optimization and kinetic studies
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Calcium diglyceroxide catalyzed biodiesel production from waste cooking oil in the presence of microwave: Optimization and kinetic studies

机译：微波作用下从废食用油中提取甘油二酸钙催化的生物柴油生产：优化和动力学研究

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The present paper reports the microwave assisted intensification of biodiesel production from waste cooking oil using heterogeneous base catalyst - calcium diglyceroxide. Initially, experiments were carried out by varying various parameters such as reaction temperature, catalyst loading, and methanol to waste cooking oil (WCO) molar ratio using one factor at a time (OFAT) approach, to estimate the best condition. Response surface methodology (RSM) was applied to optimize the process variables, using the BoxBehnken model with three level and three factor. Under the optimized reaction conditions of methanol (MeOH) to WCO molar ratio of 7.46:1, catalyst loading of 1.03% (w/w of WCO) and temperature of 62 degrees C in the presence of microwave, a maximum biodiesel yield of 94.86% was obtained, whereas in the conventional heating method showed 42.59% yield for the similar reaction time of 15 min. Reusability of the catalyst was also tested, after the first run catalytic activity of calcium diglyceroxide was decreased for consecutive cycles. The transesterification of WCO followed pseudo first-order kinetics model. The activation energy and per-exponential factor were found to be 26.56 kJ mol(-1) and 1.65 x 103 min(-1), respectively. The fuel properties of biodiesel matched with the American Society for Testing and Materials (ASTM-D6751) standards. (C) 2018 Elsevier Ltd. All rights reserved.
机译：本文报道了使用多相基础催化剂-甘油二酸钙的微波辅助强化从废食用油中生产生物柴油的过程。最初，通过一次使用一个因子（OFAT）来改变各种参数（例如反应温度，催化剂负载和甲醇与废烹饪油（WCO）的摩尔比）来进行实验，以评估最佳条件。使用具有三个级别和三个因素的BoxBehnken模型，将响应面方法（RSM）用于优化过程变量。在优化的甲醇（MeOH）与WCO摩尔比为7.46：1的反应条件下，在微波存在下催化剂负载率为1.03％（w / w WCO）和温度为62摄氏度时，最大生物柴油产率为94.86％在常规加热方法中，在15分钟的相似反应时间内，收率达到42.59％。在连续运行的循环中降低二甘油氧化钙的首次催化活性之后，还测试了催化剂的可重复使用性。 WCO的酯交换反应遵循伪一级动力学模型。发现活化能和每指数因子分别为26.56 kJ mol（-1）和1.65 x 103 min（-1）。生物柴油的燃料特性符合美国材料试验学会（ASTM-D6751）的标准。 （C）2018 Elsevier Ltd.保留所有权利。

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