化工学报 ›› 2016, Vol. 67 ›› Issue (S2): 176-183.DOI: 10.11949/j.issn.0438-1157.20161582

• 催化、动力学与反应器 • 上一篇    下一篇

KOH/ZrO2催化制备生物柴油新工艺

黄振东1,2, 王睿1, 于美青1,2   

  1. 1. 山东大学深圳研究院, 广东 深圳 518057;
    2. 山东大学环境科学与工程学院, 山东 济南 250199
  • 收稿日期:2016-11-08 修回日期:2016-11-18 出版日期:2016-12-30 发布日期:2016-12-30
  • 通讯作者: 王睿
  • 基金资助:

    深圳市知识创新计划项目(JCYJ20150626095215791)。

New technique of biodiesel preparation catalyzed by KOH/ZrO2

HUANG Zhendong1,2, WANG Rui1, YU Meiqing1,2   

  1. 1. Shenzhen Research Institute of Shandong University, Shenzhen 518057, Guangdong, China;
    2. School of Environmental Science & Engineering, Shandong University, Jinan 250199, Shandong, China
  • Received:2016-11-08 Revised:2016-11-18 Online:2016-12-30 Published:2016-12-30
  • Supported by:

    supported by the Scientific Innovation Program of Shenzhen(JCYJ20150626095215791).

摘要:

采用浸渍法,将KOH负载在新型载体氧化锆上,通过高温煅烧得到了固体碱催化剂。探讨了制备条件对催化剂催化酯交换反应活性的影响,获得了催化剂的最佳制备条件,以大豆油和甲醇为原料研究并优化了催化酯交换反应制备生物柴油的工艺条件。结果表明,固体碱催化剂KOH/ZrO2的最佳制备条件为:KOH负载量20%,煅烧温度600℃,煅烧时间2 h。固体碱催化剂催化酯交换反应的最优反应条件为:醇油比9:1,反应温度75℃,反应时间3 h,催化剂用量4.0%。各因素对产率影响的大小为:醇油摩尔比 > 反应温度 > 反应时间 > 催化剂用量。

关键词: 固体碱, 催化剂, KOH/ZrO2, 生物柴油, 制备, 酯交换反应, 载体

Abstract:

The solid base catalyst KOH/ZrO2was prepared by impregnation method,in which KOH was loaded onto a new support,ZrO2,and followed by drying and high temperature calcinations.The catalyst was characterized by XRD,TGA-DSC and FT-IR respectively.The results show that KOH has been loaded on ZrO2 successfully,which can be proved by the appearance of coordinated hydroxyls on the surface of ZrO2.However,the crystal structure of KOH/ZrO2 does not change significantly when compared with the structure of carrier.The preparation conditions for catalysts of different loading amount were determined via transesterification reaction.The optimal preparation conditions are as follows:loading amount of KOH 20%, calcination temperature 600℃,calcination time 2 h.The solid base catalyst KOH/ZrO2 was applied in catalyzing the transesterification of soybean oil with methanol,and the maximum yield of biodiesel can be higher than 90%.The influence of the reaction variables on the conversion was also investigated,and the optimal reaction conditions are as follows:reaction temperature 75℃,oil/methanol molar ratio 9:1,reaction time 3 h,catalyst dosage 4.0%(mass).

Key words: solid base, catalyst, KOH/ZrO2, biodiesel, preparation, transesterification, support

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