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首页> 外文期刊>Fuel >Transesterification of palm oil and esterification of palm fatty acid in near- and super-critical methanol with SO_4-ZrO_2 catalysts
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Transesterification of palm oil and esterification of palm fatty acid in near- and super-critical methanol with SO_4-ZrO_2 catalysts

机译:SO_4-ZrO_2催化剂在近临界和超临界甲醇中进行棕榈油的酯交换反应和棕榈脂肪酸的酯化反应

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摘要

Sulfated zirconia (SO_4-ZrO_2) catalysts, prepared with three different sulfur loading contents (0.75%, 1.8% and 2.5%) at two calcination temperatures (500 ℃ and 700 ℃), were tested for use in the transesterification of purified palm oil (PPO) and the esterification of palm fatty acid (PFA) in near-critical and super-critical methanol. Techniques including BET, XRD, NH_3- and CO_2-TPD revealed that the sulfur content and calcination temperature strongly affects the catalyst base-acid site, specific surface area, average pore size, phase structure, and thus the catalytic reactivity. The most suitable sulfur loading content was found to be 1.8% and the optimum calcination temperature 500 ℃. The results show that the use of SO_4-ZrO_2 reduces esterification reaction times, the amount of methanol necessary and the required reaction temperature. The reactions at 250 ℃ in the presence of the SO_4-ZrO_2 catalyst at 0.5 w/w% catalyst to PPO or PFA were found to give the highest FAMEs conversions. Under these conditions, 90% and 75% conversions were achieved within 10 and 1 min from PPO (at 25:1 MeOH:PPO molar ratio) and PFA (at 6:1 MeOH:PFA molar ratio), respectively.
机译:测试了在两种煅烧温度(500℃和700℃)下以三种不同硫含量(0.75%,1.8%和2.5%)制备的硫酸化氧化锆(SO_4-ZrO_2)催化剂用于纯棕榈油的酯交换反应( PPO)和棕榈脂肪酸(PFA)在近临界和超临界甲醇中的酯化反应。 BET,XRD,NH_3-和CO_2-TPD等技术表明,硫含量和煅烧温度强烈影响催化剂的碱酸位,比表面积,平均孔径,相结构以及催化反应性。发现最合适的硫负载量为1.8%,最佳煅烧温度为500℃。结果表明,使用SO_4-ZrO_2减少了酯化反应时间,所需的甲醇量和所需的反应温度。发现在SO_4-ZrO_2催化剂存在下,以0.5 w / w%的催化剂在250℃下,对PPO或PFA的反应具有最高的FAME转化率。在这些条件下,分别在10分钟和1分钟内,分别从PPO(以25:1 MeOH:PPO摩尔比)和PFA(以6:1 MeOH:PFA摩尔比)实现了90%和75%的转化率。

著录项

  • 来源
    《Fuel》 |2010年第9期|P.2387-2392|共6页
  • 作者单位

    Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Patumwan, Phayathai Road, Bangkok 10330, Thailand;

    The Joint Graduate School of Energy and Environment, King Mongkut's University of Technology Thonburi, Bangkok 10140, Thailand;

    Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Patumwan, Phayathai Road, Bangkok 10330, Thailand;

    Department of Applied Chemistry and Biochemistry, Kumamoto University, Kurokami 2-39-1, Kumamoto 860-8555, Japan;

    Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Patumwan, Phayathai Road, Bangkok 10330, Thailand;

    Department of Chemical Engineering, Faculty of Engineering and Industrial Technology, Silpakom University, Nakom Pathom 73000, Thailand;

    Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Patumwan, Phayathai Road, Bangkok 10330, Thailand;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    transesterification; esterification; super-critical; sulfated zirconia;

    机译:酯交换酯化超临界硫酸氧化锆;

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