...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Renewable energy >An efficient, recoverable solid base catalyst of magnetic bamboo charcoal: Preparation, characterization, and performance in biodiesel production
【24h】

An efficient, recoverable solid base catalyst of magnetic bamboo charcoal: Preparation, characterization, and performance in biodiesel production

机译：一种高效，可回收的磁性竹炭固体碱催化剂：生物柴油生产中的制备，表征和性能

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A novel bifunctional bamboo charcoal-based magnetic solid base catalyst (K/BC-Fe2O3) was successfully prepared by an in-situ synthesis-impregnation-calcination method. Scanning electron microscopy and Brunauer-Emmett-Teller results show that the synthesized bamboo charcoal-based magnetic catalyst possesses a mesoporous structure and high specific surface area. X-ray diffraction and X-ray photoelectron spectroscopy results indicate that after calcination of the precursor at 500 degrees C, the magnetic particles were finely fixed to the carbon skeleton of the bamboo charcoal, and the iron oxide was present as gamma-Fe2O3. The vibrating sample magnetometer results demonstrate that the superparamagnetic catalyst could be easily separated and recovered after reaction with the aid of an external magnetic field. The possible formation mechanism of the alkaline site (K2O species) on the catalyst surface can be summarized as a transverse activation at low temperature and a radial activation at high temperature. It was determined that the following are the optimum conditions for biodiesel production: an amount of added catalyst 2.5 wt%, a molar ratio of methanol/oil of 8:1, a reaction time of 1 h, and a reaction temperature 60 degrees C with a maximum yield of 98.0%. Regeneration experiments reveal that the magnetic catalyst can maintain high catalytic activity even after being reused four times. This study presents a novel bifunctional heterogeneous catalyst with potential applications in biodiesel production. (C) 2018 Elsevier Ltd. All rights reserved.
机译：通过原位合成-浸渍-煅烧法成功地制备了一种新型的双功能竹炭基磁性固体碱催化剂（K / BC-Fe2O3）。扫描电子显微镜和Brunauer-Emmett-Teller结果表明，合成的竹炭基磁性催化剂具有介孔结构和高比表面积。 X射线衍射和X射线光电子能谱结果表明，在500℃下煅烧前体后，磁性颗粒被精细地固定在竹炭的碳骨架上，并且氧化铁以γ-Fe2 O 3的形式存在。振动样品磁力计的结果表明，在外部磁场的作用下，超顺磁性催化剂在反应后可以很容易地分离和回收。催化剂表面上碱性位点（K2O种类）的可能形成机理可归纳为低温下的横向活化和高温下的径向活化。确定以下是生物柴油生产的最佳条件：催化剂的添加量为2.5 wt％，甲醇/油的摩尔比为8：1，反应时间为1 h，反应温度为60℃，最大产率为98.0％。再生实验表明，即使重复使用四次，磁性催化剂也可以保持较高的催化活性。这项研究提出了一种新型的双功能多相催化剂在生物柴油生产中的潜在应用。 （C）2018 Elsevier Ltd.保留所有权利。

著录项

  • 来源
    《Renewable energy》 |2018年第11期|531-538|共8页
  • 作者

    Liu Kang; Wang Rui; Yu Meiqing;

  • 作者单位

    Shandong Univ, Shenzhen Res Inst, Shenzhen 518057, Guangdong, Peoples R China;

    Shandong Univ, Shenzhen Res Inst, Shenzhen 518057, Guangdong, Peoples R China;

    Shandong Univ, Shenzhen Res Inst, Shenzhen 518057, Guangdong, Peoples R China;

  • 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

    Biomass; Bamboo charcoal; Magnetic catalyst; Solid base catalyst; Biodiesel;

    机译：生物质;竹炭;磁性催化剂;固体碱催化剂;生物柴油;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号