燃料化学学报2016，Vol.44Issue(8)：928-936,9.
Pd/MWCNTs贫燃甲烷催化燃烧性能研究
Catalytic combustion of methane over Pd/MWCNTs under lean fuel conditions
摘要
Abstract
The raw multi-walled carbon nanotubes ( MWCNTs) were treated with nitric acid. The shift of the surface functional groups on the MWCNTs was observed with XPS. The Pd/MWCNTs catalysts were synthesized by the ultrasonic impregnation method. The total contents of oxygen, hydroxyl and carbonyl groups were measured. The dispersion and size distribution of Pd particles were characterized with TEM. The dependence of Pd dispersion on the oxygen-containing functional groups was validated. The effect of pretreatment on the catalytic activity and stability for methane combustion was investigated under lean fuel conditions. It is shown that the catalytic activity depends on the valence state and particle size of palladium. The transformation from Pd to PdO possibly caused the decrease in the catalytic activity. Another factor inducing deactivation is Pd particle aggregation. The reaction mechanism for methane combustion over the Pd/MWCNTs catalyst is postulated on the basis of the intermediate species detected by in-situ FT-IR spectroscopy.关键词
MWCNTs/甲烷燃烧/含氧官能团/活性物种/反应机理Key words
MWCNTs/methane combustion/oxygen-contained functional groups/active species/reaction mechanism分类
化学工程引用本文复制引用
高秀慧,王胜,高典楠,刘为钢,陈志萍,汪明哲,王树东..Pd/MWCNTs贫燃甲烷催化燃烧性能研究[J].燃料化学学报,2016,44(8):928-936,9.基金项目
The project was supported by the National Natural Science Foundation of China (21306185,21276250) and National Key Research and Development Project(2016YFC0204305).国家自然科学基金(21306185,21276250)和国家重大研究开发项目(2016YFC0204305)资助 （21306185,21276250）
