Investigation into the mechanism of NiMg(Ca)bAlcOx catalytic activity for production of solarised syngas from carbon dioxide reforming of methane

被引：8

作者：

Sun, Y. ^{[1
]}

Collins, M. ^{[1
]}

French, D. ^{[2
]}

McEvoy, S. ^{[1
]}

Hart, G. ^{[1
]}

Stein, W. ^{[1
]}

机构：

[1] CSIRO Energy Technol, Newcastle, NSW 2300, Australia

[2] CSIRO Energy Technol, N Ryde, NSW 1670, Australia

来源：

FUEL | 2013年 / 105卷

关键词：

NiMg(Ca)(b)AlcOx catalysts; Carbon dioxide reforming of methane; Syngas; Solar reforming; SYNTHESIS GAS; PARTIAL OXIDATION; CH4; OXIDES; STEAM;

D O I：

10.1016/j.fuel.2012.08.057

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

A series of NiMg(Ca)(b)AlcOx catalysts prepared by co-precipitation were investigated for carbon dioxide reforming of methane at 750 degrees C and one atmosphere to determine the mechanism of these catalysts' activity. X-ray diffraction, scanning electron microscopy combined with energy dispersive X-ray analysis and temperature programmed reduction showed that Ni-Mg-Al-O solid solution formed in the catalysts. NiMg3AlOx exhibited excellent performance with a stable CH4 conversion rate of 3.3854 x 10 (3) (mol/g cat/s), due to the formation of Ni-Mg-Al-O solid solution with a high proportion of Ni-Mg-O, and an optimum proportion of weak to intermediate to strong basic sites. Changing the Mg/Al atomic ratio of NiMgbAlcOx affects these catalysts' performance. Replacing Mg in NiMg3AlOx with Ca obviously reduces catalyst activity and stability, because of a lack of Ni-Mg solid solution and a smaller Brunauer-Emmett-Teller specific surface area. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：551 / 558

页数：8

共 29 条

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