助手标题  
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
查询帮助
意见反馈
   ultrafine mo 在 化学 分类中 的翻译结果: 查询用时:0.323秒
图标索引 在分类学科中查询
所有学科
化学
机械工业
更多类别查询

图标索引 历史查询
 

ultrafine mo
相关语句
  超细mo
    Ultrafine Mo/Al2O3 Catalysts for Hydrodesulfurization(Ⅰ)──Catalytic Performances and Reduction Behavior of UFP-Mo/Al2O3 Catalysts
    超细Mo/Al_2O_3催化剂(Ⅰ)──催化及还原性质研究
短句来源
    A series of ultrafine Mo Co K catalyst samples with different Co/Mo ratios were investigated.
    采用XPS技术对氧化态及还原态超细Mo Co K催化剂进行了研究 .
短句来源
    Ultrafine Mo Co K catalysts were prepared by the "gel like" method followed by supercritical fluid drying technique.
    采用类凝胶 超临界流体干燥法制备了超细Mo Co K催化剂 ,并运用TEM和选区电子衍射技术对制得的催化剂进行了表征。
短句来源
查询“ultrafine mo”译词为用户自定义的双语例句

    我想查看译文中含有:的双语例句
例句
为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。
  ultrafine mo
A linear relation between the selectivity and Mo4+ species content led to the conclusion that the Mo4+ species was the main active species for higher alcohol synthesis over the ultrafine Mo-Co-K catalysts.
      
Among the ultrafine Mo-Co-K catalysts, the best one corresponded to the Co/Mo mole ratio of 1:7.
      
Ultrafine Mo-Co-K catalysts were prepared and tested for higher alcohol synthesis.
      
Synthesis of Higher Alcohols from Syngas over Ultrafine Mo-Co-K Catalysts
      
The unique catalytic properties of ultrafine Mo-Ce oxide particles may be correlated not only to the interaction between molybdenum oxide and cerium oxide, but also to the higher reactivity of lattice oxygen species in the ultrafine oxide matrix.
      
更多          


A series of ultrafine Mo Co K catalyst samples with different Co/Mo ratios were investigated. The catalyst samples were characterized by XPS and the catalytic performance of the catalyst for synthesis of lower alcohols was investigated. The XPS results indicated that the molybdenum exists as Mo 6+ and (Mo 6+ +Mo 4+ ) in the unreduced and reduced catalyst, respectively, while the cobalt exists as Co 2+ in both unreduced and reduced catalyst. An interaction between...

A series of ultrafine Mo Co K catalyst samples with different Co/Mo ratios were investigated. The catalyst samples were characterized by XPS and the catalytic performance of the catalyst for synthesis of lower alcohols was investigated. The XPS results indicated that the molybdenum exists as Mo 6+ and (Mo 6+ +Mo 4+ ) in the unreduced and reduced catalyst, respectively, while the cobalt exists as Co 2+ in both unreduced and reduced catalyst. An interaction between the Mo species and Co species exists in the catalyst. The XPS results revealed that the content of Mo 4+ species has a maximum value at n (Co)/ n (Mo)=0 13. A linear relation between the alcohol selectivity and the Mo 4+ content in the reduced catalyst leads to the conclusion that Mo 4+ species in the catalyst may be the active sites for synthesis of lower alcohols.

采用XPS技术对氧化态及还原态超细Mo Co K催化剂进行了研究 .结果表明 ,在氧化态超细Mo Co K催化剂中 ,钼和钴分别以Mo6 +和Co2 +物种存在 ,催化剂中各物种之间存在着相互作用 ;随着Co/Mo比的增大 ,还原态催化剂中Mo4+物种的含量逐渐增大并出现极大值 ;催化剂上合成低碳醇反应性能与其表面的Mo4+物种有关 .将催化剂表面的Mo4+物种含量与其合成低碳醇选择性进行关联 ,发现二者存在着很好的对应关系 .此外 ,对超细Mo Co K催化剂上合成低碳醇反应的活性中心进行了初步探讨

Ultrafine Mo-Co-K catalysts were prepared by the “gel-like”method followed by supercritical fluid drying technique The texture and structure of ultrafine Mo-Co-K catalysts were characterized by BET, TEM, XRD and TPR, and the performances for alcohol synthesis on reduced catalysts from syngas were investigated It was revealed that appropriate addition of cobalt and potassium into the catalyst system resulted in an increase of the specific surface area and a decrease of the average pore radius...

Ultrafine Mo-Co-K catalysts were prepared by the “gel-like”method followed by supercritical fluid drying technique The texture and structure of ultrafine Mo-Co-K catalysts were characterized by BET, TEM, XRD and TPR, and the performances for alcohol synthesis on reduced catalysts from syngas were investigated It was revealed that appropriate addition of cobalt and potassium into the catalyst system resulted in an increase of the specific surface area and a decrease of the average pore radius of the catalyst, but more addition of cobalt and potassium showed a quite opposite trend At Co/Mo=1∶7 and K w%=1%, the catalyst got its maximum specific surface area and minimum average pore radius of 22 13 m 2/g and 8 93 nm, respectively Mo, Co and K in ultrafine Mo-Co-K catalysts showed strong interaction which led to the formation of CoMoO 4 and K 2Mo 4O 13 The incorporation of cobalt and potassium into the catalyst system resulted in the decrease of the reduction temperature of the catalyst, which could be attributed to the interaction among Mo, Co and K The incorporation of cobalt into the catalyst system not only improved the selectivity for alcohols and activity of the catalyst significantly, but also shifted the distribution of alcohols towards higher ones The incorporation of potassium into the catalyst system obviously increased both activity and selectivity for the formation of alcohols and shifted the product distribution of alcohols towards lower ones Optimum activity to alcohols could be achieved at an optimum Co/Mo atomic ratio (1∶7) and K content (w 1%), i.e., Alc STY=624 4g/kg h, Alc sel =48 5% and C 2+ OH/C 1OH=1 08 under 300℃, 6 0MPa, and 10000h -1

采用类凝胶法和超临界流体干燥技术制备了超细Mo -Co -K催化剂。通过BET、TEM、XRD和TPR等表征手段比较分析了不同制备参数尤其是Co/Mo比对超细Mo-Co -K催化剂性能的影响。结果表明 ,制得的催化剂为大比表面积、小粒径、大孔超细粒子。超细催化剂中Mo、Co、K之间具有较强的相互作用 ,形成了CoMoO4 和K2 Mo4 O13 物种。超细Mo基催化剂中加入Co和K均可降低催化剂的还原温度。合成低碳醇反应评价结果表明 ,超细Mo -Co-K催化剂具有很高的催化活性、选择性以及生成碳二以上醇的选择性。

Ultrafine Mo Co K catalysts were prepared by the "gel like" method followed by supercritical fluid drying technique. The types of particles were observed in the TEM micrograph: one was pellet shaped micro crystallites and the other was ball like small particles. The electron diffraction result indicated that the former corresponded to MoO 3 and the latter corresponded to CoMoO 4.

采用类凝胶 超临界流体干燥法制备了超细Mo Co K催化剂 ,并运用TEM和选区电子衍射技术对制得的催化剂进行了表征。结果表明 ,制得的催化剂由属于超细粒子范畴的片状微晶和球状小颗粒组成 ,进一步经选区电子衍射技术分析 ,前者归属为MoO3 物相 ,后者归属为CoMoO4 物相

 
<< 更多相关文摘    
图标索引 相关查询

 


 
CNKI小工具
在英文学术搜索中查有关ultrafine mo的内容
在知识搜索中查有关ultrafine mo的内容
在数字搜索中查有关ultrafine mo的内容
在概念知识元中查有关ultrafine mo的内容
在学术趋势中查有关ultrafine mo的内容
 
 

CNKI主页设CNKI翻译助手为主页 | 收藏CNKI翻译助手 | 广告服务 | 英文学术搜索
版权图标  2008 CNKI-中国知网
京ICP证040431号 互联网出版许可证 新出网证(京)字008号
北京市公安局海淀分局 备案号:110 1081725
版权图标 2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社