...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Catalysis science & technology >Functionalising hydrothermal carbons for catalysis - investigating solid acids in esterification reactions
【24h】

Functionalising hydrothermal carbons for catalysis - investigating solid acids in esterification reactions

机译：Functionalising催化水热碳——调查固体酸酯化反应

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 simple and controllable acid functionalised catalyst synthesis is presented based on the hydrothermal carbonisation (HTC) of glucose in the presence of the structure directing agent sodium borate. This synthetic strategy in combination with a post-thermal carbonisation step allows direction of porosity/specific surface area, and HTC xerogel material functionality. All these parameters influence the introduction of S-containing functional groups (e.g. acidity) to the xerogel. The prepared acid functionalised HTC materials were characterised via N-2 sorption, back titration, elemental analysis, XPS, ATR FT-IR, and SEM, with their applicability as solid acids assessed through model esterification reactions of different organic acids (e.g. short alkyl chain and aromatic systems). An S-functionalised HTC catalyst described in this study with a high specific surface area and porosity (502 m(2) g(-1); 0.42 cm(3) g(-1)), and a loading of 1.1 mmol g(-1) SO3H/SO42- acid sites (from a 2.7 mmol g(-1) of total acid groups) was found to have comparable catalytic activities as commercial Amberlyst-36 (R) catalyst in all the investigated esterification reactions. Catalyst re-usability under the applied batch conditions was improved by heating the catalyst at higher temperatures in order to remove deposited organic acids and their derivatives. The concept presented provides a basis for further development and optimisation of HTC supported catalysts in acid and other catalysis.
机译：一个简单的和可控的酸functionalised催化剂合成提出了基于水热碳化(HTC)的葡萄糖指导代理结构的存在四硼酸钠。结合post-thermal碳化一步使孔隙度/具体的方向表面积,HTC干凝胶材料功能。S-containing官能团的引入干凝胶(如酸性)。functionalised HTC材料特征通过n -吸附、滴定,元素分析、XPS和SEM, ATR红外光谱适用性作为固体酸通过评估模型不同的酯化反应有机酸(如短烷基链和芳香系统)。本研究中描述的高催化剂比表面积和孔隙度(502米(2)g (1);更易与g (1) SO3H / SO42 -酸网站(从2.7更易总酸的g(1)组)被发现与催化作为商业活动在所有的调查Amberlyst-36 (R)催化剂酯化反应。在批处理应用条件下得到了改进通过加热催化剂在更高的温度为了去除有机酸及其沉积衍生品。进一步开发和优化的基础宏达电催化剂酸和其他支持催化。

著录项

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