燃料化学学报2017，Vol.45Issue(7)：846-853,8.
制备方法对NiCo/MgO催化剂结构及其甲烷二氧化碳重整反应性能的影响
Influence of preparation method on the structure of NiCo/MgO catalyst and its performance in the reforming of CH4 with CO2
摘要
Abstract
To enhance the performance of nickel-based catalysts in the reforming of CH4 with CO2 and alleviate the coke deposition, a series of NiCo/MgO catalysts were prepared by different methods, viz. , deposition-precipitation ( DP ) , co-precipitation method ( CP ) and co-impregnation ( CI ); the influence of preparation method on the structure and performance of NiCo/MgO catalyst was then investigated. The results show that during the deposition-precipitation process, CO ( NH2 ) 2 as the precipitant could created an alkaline atmosphere for the complete hydrolysis of Ni2+ and Co2+ ions, leading to a relatively fast nucleation and growth of active species; however, oversaturation may occur during the co-precipitation process with NaOH and Na2 CO3 as the precipitants. In comparison with the catalysts prepared by CP and CI, the NiCo/MgO-DP catalyst is provided with superior reduction capacity, smaller particle size (9. 7 nm), higher Ni/Co dispersion (10. 4%) and larger specific surface area (68. 1 m2/g) and then exhibits better resistance to coke deposition. Over the DP catalyst, the conversions of CH4 and CO2 at 800℃ reach 88% and 92%, respectively, much higher than those over the CP and CI catalysts; moreover, the DP catalyst also gives much higher yield of H2 and CO as well as better stability for methane reforming with CO2 .关键词
甲烷二氧化碳重整/制备方法/镍/钴/氧化镁/沉积沉淀/共沉淀/共浸渍Key words
methane reforming with CO2/preparation method/Ni/Co/MgO/deposition-precipitation/co-precipitation method/co-impregnation分类
化学化工引用本文复制引用
张堉彬,荆洁颖,李婷玉,霍俊梅,李文英..制备方法对NiCo/MgO催化剂结构及其甲烷二氧化碳重整反应性能的影响[J].燃料化学学报,2017,45(7):846-853,8.基金项目
The projected was supported by the National Natural Science Foundation of China (21406155, U1361202), Program for the Top Young Academic Leaders of Higher Learning Institutions of Shanxi (164010121-S) and Shanxi Scholarship Council of China (2016-027).国家自然科学基金(21406155, U1361202), 山西省高等学校创新人才支持计划(164010121-S)和山西省回国留学人员科研项目(2016-027)资助 （21406155, U1361202）
