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过程工程学报 ›› 2018, Vol. 18 ›› Issue (4): 845-850.DOI: 10.12034/j.issn.1009-606X.217363

• 环境与能源 • 上一篇    下一篇

微波辅助玉米油基生物柴油制备及酯化反应动力学

张德谨1,2*, 谢 永1, 李梦玉1, 徐开兵1, 吴晶玲1, 孙欢欢1, 童家横1   

  1. 1. 宿州学院化学化工学院,安徽宿州 234000
    2. 宿州学院精细化工产品开发研究所,安徽宿州 234000
  • 收稿日期:2017-10-16 修回日期:2018-01-04 出版日期:2018-08-22 发布日期:2018-08-15
  • 通讯作者: 张德谨 szxyzdj@163.com
  • 基金资助:
    宿州学院科研平台开放课题项目;宿州学院大学生科研项目

Preparation of biodiesel from corn oil assisted by microwave and reaction kinetics of esterification

Dejin ZHANG1,2*, Yong XIE1, Mengyu LI1, Kaibing XU1, Jingling WU1, Huanhuan SUN1, Jiaheng Tong1   

  1. 1. School of Chemistry & Chemical Engineering, Suzhou University, Suzhou, Anhui 234000, China
    2. Fine Chemical Product Development Research Institute, Suzhou University, Suzhou, Anhui 234000, China
  • Received:2017-10-16 Revised:2018-01-04 Online:2018-08-22 Published:2018-08-15

摘要: 以玉米油和甲醇为原料、浓硫酸作催化剂,微波辅助制备生物柴油,研究了反应时间、反应温度、催化剂体积及微波功率对玉米油酯化率的影响,在单因素实验基础上优化制备工艺,考察了酯化反应的动力学. 结果表明,微波辅助制备玉米油基生物柴油的最佳条件为反应温度72.0℃、时间17.5 min、催化剂用量为玉米油体积的8.5%和微波功率200 W,该条件下酯化率可达77.6%. 酯化反应级数为1.28,活化能Ea=1.79 J/mol,酯化反应的动力学方程为r=8.214e?1.792/RTC1.28 .

关键词: 玉米油, 生物柴油, 酯化率, 动力学

Abstract: Assisted by microwave, biodiesel was synthesized using corn oil and methanol as the raw materials and concentrated sulfuric acid as the catalyst. Effect of time, temperature, volume of catalyst and microwave power on the esterification yield was investigated. The synthetic process parameters were optimized based on single factor experiment, and kinetics of esterification reaction was investigated. The results indicated the optimum process conditions were reaction temperature of 72.0℃, reaction time of 17.5 min, catalyst dosage of 8.5vol% of corn oil and microwave power of 200 W. The esterification yield was 77.6% under these conditions. The order and the activation energy of the esterification reaction were obtained as 1.28 and 1.79 J/mol respectively, and the kinetic model was established as r=8.214e?1.792/RTC1.28.

Key words: corn oil, biodiesel, esterification rate, kinetic