CaO助剂对Co/活性炭催化CH_4-CO_2重整反应的研究
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- 英文论文题名：Carbon dioxide reforming of methane over CaO-promoted Co/activated carbon catalyst
- 论文作者：屈江文 ; 郝兰霞 ; 贾永 ; 王宏宇 ; 苏爱廷 ; 张国杰
- 英文论文作者：Jiangwen Qu ; Lanxia Hao ; Yong Jia ; Hongyu Wang ; Aiting Su ; Guojie Zhang ; State Key Laboratory Breeding Base of Coal Science and Technology Co-founded by Shanxi Province and the Ministry of Science and Technology ; Taiyuan University of Technology ; Shanxi Provincial Guoxin Energy Development Group Co. ; Ltd
- 年：2016
- 作者机构：山西省煤科学与技术重点实验室-省部共建国家重点实验室培育基地;山西省国新能源发展集团有限公司;
- 论文关键词：甲烷二氧化碳重整 ; 活性炭 ; Co催化剂
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第十五分会：表界面结构调控与催化
- 语种：中文
- 分类号：O621.251
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第十五分会 ; 表界面结构调控与催化
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：143k
- 原文格式：D
- 会议级别：全国
摘要
本文研究了Ca O对Co/活性炭(AC)催化剂的结构和催化甲烷二氧化碳重整性能的影响,结果表明Ca金属的加入可以明显的提高Co/AC在700~900℃之间的催化活性和稳定性,在反应温度800℃条件下,Co-Ca O/AC催化甲烷和二氧化碳的转化率分别为89.2%和93.4%。通过BET和SEM表征结果发现,Co/AC催化剂中添加Ca金属可以增大催化剂的比表面积,使活性金属分布更加均匀。H2-TPR、XPS和XRD分析表明,Ca金属的添加使催化剂上形成新的金属晶粒,生成的Ca3Co2O6在重整反应过程中能够循环为反应提供新的活性位,同时Ca金属促进了CH4裂解沉积碳与CO_2消碳达到平衡,从而维持催化剂的活性和稳定性。另外,超声浸渍可以使Co和Ca均匀的分布在载体催化剂表面,能够抑制团聚或微晶聚集现象发生,从而达到控制Co-Ca双金属晶体颗粒大小的效果。
The effect of Ca O to Co/activated carbon(AC) catalyst structure and catalytic performance on carbon dioxide reforming of methane was studied,results showed that the addition of Ca metal could significantly improve the Co/AC catalytic activity and stability between 700~900℃,When the reaction temperature was 800℃,the conversion of methane and carbon dioxide were 89.2% and 93.4%,respectively.Characterized by BET and SEM and the results showed that adding Ca metal to Co/AC catalyst increased the specific surface area of catalyst and improved the distribution uniformity of active metal.H_2-TPR,XPS and XRD analysis showed that Ca_3Co_2O_6 was generated on the catalyst by the addition of Ca O,the generated Ca_3Co_2O_6 can provide new active site in the reaction,at the same time,Ca metal promoted the carbon balance between CH_4 and CO_2 for CH_4 cracking generates and CO_2 eliminates the sedimentary carbon,thus maintaining catalyst activity and stability.In addition,ultrasonic impregnation can make the Co and Ca uniformly distributed in the surface of the catalyst support and can inhibit reunion or microcrystalline gathered phenomenon,so as to control the Co-Ca double metal crystal size.
The effect of Ca O to Co/activated carbon(AC) catalyst structure and catalytic performance on carbon dioxide reforming of methane was studied,results showed that the addition of Ca metal could significantly improve the Co/AC catalytic activity and stability between 700~900℃,When the reaction temperature was 800℃,the conversion of methane and carbon dioxide were 89.2% and 93.4%,respectively.Characterized by BET and SEM and the results showed that adding Ca metal to Co/AC catalyst increased the specific surface area of catalyst and improved the distribution uniformity of active metal.H_2-TPR,XPS and XRD analysis showed that Ca_3Co_2O_6 was generated on the catalyst by the addition of Ca O,the generated Ca_3Co_2O_6 can provide new active site in the reaction,at the same time,Ca metal promoted the carbon balance between CH_4 and CO_2 for CH_4 cracking generates and CO_2 eliminates the sedimentary carbon,thus maintaining catalyst activity and stability.In addition,ultrasonic impregnation can make the Co and Ca uniformly distributed in the surface of the catalyst support and can inhibit reunion or microcrystalline gathered phenomenon,so as to control the Co-Ca double metal crystal size.
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