| 介孔Al2O3负载PdO催化甲烷燃烧反应性能 |
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| 引用本文： | 王月娟,郭美娜,鲁继青,罗孟飞.介孔Al2O3负载PdO催化甲烷燃烧反应性能[J].催化学报,2011,32(9):1496-1501. |
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| 作者姓名： | 王月娟 郭美娜 鲁继青 罗孟飞 |
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| 作者单位： | 浙江师范大学物理化学研究所,先进催化材料省部共建教育部重点实验室,浙江 金华 321004 |
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| 基金项目： | 浙江省科技计划项目(2008C21020)~~ |
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| 摘 要： | 采用浸渍法制备了介孔Al2O3(M-Al2O3)负载PdO催化剂,考察了其催化CH4燃烧反应性能.结果表明,以M-Al2O3为载体的PdO催化剂活性比普通Al2O3载体高得多,这很可能与M-Al2O3的孔道结构对PdO物种的限域作用有关.随着PdO/M-Al2O3催化剂焙烧温度的升高,甲烷催化燃烧活性先增加后降低,其中700oC焙烧的催化剂活性最高,400oC反应时CH4转化率为91%.此时Pd物种主要以PdO颗粒形式高度分散在载体的介孔孔道内,而高温焙烧时,Pd物种主要以Pd和PdO的混合晶相存在.尽管900oC焙烧制得的催化剂上CH4的转化率降低,但TOF值最大,这可能与该催化剂中同时存在金属Pd和PdO有关.
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| 关 键 词： | 介孔氧化铝 钯 甲烷 催化燃烧 活性位 |
Mesoporous Alumina Supported PdO Catalysts for Catalytic Combustion of Methane |
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| WANG Yuejuan,GUO Meina,LU Jiqing,LUO Mengfei.Mesoporous Alumina Supported PdO Catalysts for Catalytic Combustion of Methane[J].Chinese Journal of Catalysis,2011,32(9):1496-1501. |
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| Authors: | WANG Yuejuan GUO Meina LU Jiqing LUO Mengfei |
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| Institution: | WANG Yuejuan,GUO Meina,LU Jiqing,LUO Mengfei* Key Laboratory of the Ministry of Education for Advanced Catalysis Materials,Institute of Physical Chemistry,Zhejiang Normal University,Jinhua 321004,Zhejiang,China |
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| Abstract: | Pd catalysts supported on mesoporous alumina (M-Al2O3) were prepared by an impregnation method and tested for CH4 catalytic combustion. PdO/M-Al2O3 was more active than the PdO catalyst supported on conventional Al2O3 because of a higher dispersion of PdO species induced by the mesoporous structure of M-Al2O3. Moreover, with increasing calcination temperature, the conversion of CH4 over PdO/M-Al2O3 catalysts first increased and then decreased. The best catalytic performance was obtained on the PdO/M-Al2O3 c... |
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| Keywords: | mesoporous alumina palladium methane catalytic combustion active site |
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