Methane dry reforming on Ni/La2Zr2O7 treated by plasma in different atmospheres

能源化学(英文) ›› 2015, Vol. 21 ›› Issue (4): 416-424.

Methane dry reforming on Ni/La₂Zr₂O₇ treated by plasma in different atmospheres

Honggen Peng^a, Youhe Ma^a, Wenming Liu^a, Xianglan Xu^a, Xiuzhong Fang^a, Jie Lian^a, Xiang Wang^a, Changqing Li^b, Wufeng Zhou^b, Ping Yuan^b

a College of Chemistry, Nanchang University, Nanchang 330031, Jiangxi, China;
b Jiangxi Golden Century Advanced Materials Co. Ltd., Nanchang 330031, Jiangxi, China

收稿日期:2015-03-20 修回日期:2015-06-30 发布日期:2015-08-21
通讯作者: Xiang Wang
基金资助:
This work is supported by the Chinese Natural Science Foundation (21263015 and 21203088), the Education Department of Jiangxi Province (KJLD14005 and GJJ14205) and the Natural Science Foundation of Jiangxi Province (20142BAB213013), which is greatly acknowledged by the authors.

Methane dry reforming on Ni/La₂Zr₂O₇ treated by plasma in different atmospheres

Honggen Peng^a, Youhe Ma^a, Wenming Liu^a, Xianglan Xu^a, Xiuzhong Fang^a, Jie Lian^a, Xiang Wang^a, Changqing Li^b, Wufeng Zhou^b, Ping Yuan^b

a College of Chemistry, Nanchang University, Nanchang 330031, Jiangxi, China;
b Jiangxi Golden Century Advanced Materials Co. Ltd., Nanchang 330031, Jiangxi, China

Received:2015-03-20 Revised:2015-06-30 Published:2015-08-21
Contact: Xiang Wang
Supported by:
This work is supported by the Chinese Natural Science Foundation (21263015 and 21203088), the Education Department of Jiangxi Province (KJLD14005 and GJJ14205) and the Natural Science Foundation of Jiangxi Province (20142BAB213013), which is greatly acknowledged by the authors.

摘要/Abstract

摘要： A series of Ni/La₂Zr₂O₇ pyrochlore catalysts prepared by impregnation method and treated by dielectric barrier discharge (DBD) plasma in different atmospheres and varied sequences were prepared and applied for dry reforming of methane (DRM). It is found that all of the plasma treated catalysts show evidently improved activity and coke resistance in comparison with the non-plasma treated one. The best performance is achieved on Ni/La₂Zr₂O₇-H₂P-C, a catalyst treated in H₂ plasma before calcination. TGA-DSC and SEM demonstrate that carbon deposition is significantly suppressed on all of the plasma treated samples. Moreover, XRD and TEM results testify that both NiO and Ni sizes on the calcined and reduced samples treated by plasma are also decreased, which results in higher Nimetal dispersion on the reduced and used catalysts and enhances the interactions between Ni sites and the support. It is believed that these are the inherent reasons accounting for the promotional effects of plasma treatment on the reaction performance of the Ni/La₂Zr₂O₇ pyrochlore catalysts.

关键词: Methane dry reforming, Ni-based catalysts, Pyrochlore support, DBD plasma, Coke resistance

Abstract: A series of Ni/La₂Zr₂O₇ pyrochlore catalysts prepared by impregnation method and treated by dielectric barrier discharge (DBD) plasma in different atmospheres and varied sequences were prepared and applied for dry reforming of methane (DRM). It is found that all of the plasma treated catalysts show evidently improved activity and coke resistance in comparison with the non-plasma treated one. The best performance is achieved on Ni/La₂Zr₂O₇-H₂P-C, a catalyst treated in H₂ plasma before calcination. TGA-DSC and SEM demonstrate that carbon deposition is significantly suppressed on all of the plasma treated samples. Moreover, XRD and TEM results testify that both NiO and Ni sizes on the calcined and reduced samples treated by plasma are also decreased, which results in higher Nimetal dispersion on the reduced and used catalysts and enhances the interactions between Ni sites and the support. It is believed that these are the inherent reasons accounting for the promotional effects of plasma treatment on the reaction performance of the Ni/La₂Zr₂O₇ pyrochlore catalysts.

Key words: Methane dry reforming, Ni-based catalysts, Pyrochlore support, DBD plasma, Coke resistance

Honggen Peng, Youhe Ma, Wenming Liu, Xianglan Xu, Xiuzhong Fang, Jie Lian, Xiang Wang, Changqing Li, Wufeng Zhou, Ping Yuan. Methane dry reforming on Ni/La₂Zr₂O₇ treated by plasma in different atmospheres[J]. 能源化学(英文), 2015, 21(4): 416-424.

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Methane dry reforming on Ni/La₂Zr₂O₇ treated by plasma in different atmospheres

Methane dry reforming on Ni/La₂Zr₂O₇ treated by plasma in different atmospheres

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