• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >CO methanation over a macro-mesoporous Al2O3 supported Ni catalyst in a fluidized bed reactor
【24h】

CO methanation over a macro-mesoporous Al2O3 supported Ni catalyst in a fluidized bed reactor

机译：在流化床反应器中的宏观 - 中孔Al2O3支持的Ni催化剂上的甲烷化

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

The synthesis and characterization of highly active and stable Ni nanoparticles supported on macro-mesoporous Al2O3 as a CO methanation catalyst for the production of synthetic natural gas are reported. The macro-mesoporous Ni-Al2O3 catalyst (MNC) is synthesized by combination of sol-gel and supercritical drying methods. The MNC showed much higher activity and higher thermal stability for methanation than the catalyst obtained via the conventional wet impregnation method, especially under harsh conditions of high temperatures and high GHSV (90 000 h(-1)). The enhancement in activity of the synthesized MNC catalyst is attributed to the highly stable and smaller Ni nanoparticles that are embedded on the macro-mesoporous structure. The MNC also showed a higher rate constant and lower diffusion activation energy, which should be attributed to the macro-mesoporous structure that facilitated the diffusion of gas products and then enhanced the removal of reaction heat from the catalyst surface. Thus leading to a higher resistance to Ni sintering and carbon deposition.
机译：据报道，作为生产合成天然气生产的宏观 - 中孔Al2O3负载的高活性和稳定Ni纳米颗粒的合成和表征。通过溶胶 - 凝胶和超临界干燥方法组合合成宏观介孔Ni-Al2O3催化剂（MNC）。 MNC表现出比通过常规湿浸渍方法获得的催化剂的甲烷化的活性更高，甲烷化稳定性更高，特别是在高温和高GHSV的苛刻条件下（90 000H（-1））。合成的MNC催化剂活性的增强归因于嵌入宏观介孔结构上的高稳定且较小的Ni纳米颗粒。 MNC还显示出更高的速率恒定和较低的扩散活化能量，其应归因于促进气体产品扩散的宏观介孔结构，然后增强了从催化剂表面去除反应热。因此，导致耐氢烧结和碳沉积更高的抗性。

著录项

  • 来源
    《RSC Advances》 |2015年第79期|共9页
  • 作者

    Li Jun; Zhou Li; Zhu Qingshan; Li Hongzhong;

  • 作者单位

    Chinese Acad Sci Inst Proc Engn State Key Lab Multiphase Complex Syst Beijing 100190 Peoples R China;

    Chinese Acad Sci Inst Proc Engn State Key Lab Multiphase Complex Syst Beijing 100190 Peoples R China;

    Chinese Acad Sci Inst Proc Engn State Key Lab Multiphase Complex Syst Beijing 100190 Peoples R China;

    Chinese Acad Sci Inst Proc Engn State Key Lab Multiphase Complex Syst Beijing 100190 Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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