...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Catalysis science & technology >A facile, low-cost route for the preparation of calcined porous calcite and dolomite and their application as heterogeneous catalysts in biodiesel productiont
【24h】

A facile, low-cost route for the preparation of calcined porous calcite and dolomite and their application as heterogeneous catalysts in biodiesel productiont

机译：一条易于制备的钙质方解石和白云石制备的低成本途径及其在生物柴油生产中的异质催化剂

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

Despite their potential for biodiesel synthesis, directly calcined minerals rich in magnesium/calcium carbonates are used at the expense of large amounts of the catalyst, high alcohol loading, long processing times, and severe conditions. We report a facile and low-cost route for preparing calcined porous calcite (CPC) and dolomite (CPD) via simple thermal decomposition of the reaction mixtures of natural calcite and dolomite with stearic acid. CPC and CPD, both of which have porous structures, were compared with previously reported catalysts and examined as promising heterogeneous base catalysts under mild conditions. A 40% increase in conversion through CPC and CDC was achieved compared with that achieved through directly calcined minerals. A systematic understanding of the enhancement and deactivation relationships of the products was established by catalyst characterization, including XRD, BET, CO2-TPD, SEM, TEM, and XPS. The obtained CPC and CPD showed large pore sizes and high active site densities and provided an advantageous environment for transesterification of triglyceride with methanol. CPC and CPD are re-usable and show no loss of activity after regeneration.
机译：尽管它们具有生物柴油合成的潜力，但使用富含镁/钙钙的直接钙化矿物质，以大量催化剂，高酒精载荷，较长的加工时间和严重的条件为代价。我们通过简单的和低成本的途径通过简单的天然方解石和白云石与硬脂酸的反应混合物的简单热分解来制备钙化的多孔方解石（CPC）和白云岩（CPD）（CPD）。将CPC和CPD与先前报道的催化剂进行了比较，并将其与在轻度条件下的有希望的异质碱催化剂进行了比较。与直接钙化矿物质相比，通过CPC和CDC的转化率增加了40％。通过催化剂表征（包括XRD，BET，CO2-TPD，SEM，TEM和XPS）建立了对产品增强和失活关系的系统理解。获得的CPC和CPD显示出较大的孔径和较高的活性位点密度，并为用甲醇延迟甘油三酸酯提供了有利的环境。 CPC和CPD可重复使用，并且在再生后没有表现出活性损失。

著录项

相似文献

  • 外文文献
  • 中文文献
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