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首页> 外文期刊>Catalysis science & technology >Significant roles of mesostructure and basic modifier for ordered mesoporous Ni/CaO-Al2O3 catalyst towards CO2 reforming of CH4
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Significant roles of mesostructure and basic modifier for ordered mesoporous Ni/CaO-Al2O3 catalyst towards CO2 reforming of CH4

机译：介质结构和基本修饰符的重要作用，用于有序的中孔Ni/CaO-Al2O3催化剂CH4的二氧化碳催化剂

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摘要

An ordered mesoporous CaO-Al2O3 composite oxide had been designed and prepared via improved evaporation induced self-assemble strategy (EISA). The resultant material was utilized as the support of Ni based catalyst for CO2 reforming of CH4. in order to study the roles of the ordered mesopore structure and basic modifier in promoting the catalytic properties toward the CO2 reforming of CH4 reaction, non-mesoporous CaO-Al2O3 without ordered mesostructure and ordered mesoporous Al2O3 without basic modifier were also synthesized, respectively. It was found that both the ordered mesostructure and CaO basic modifier showed significant effects in promoting catalytic activity, stability and suppressing the carbon deposition during their 100 h long term stability tests. Compared with traditional supported catalysts, the confinement effect of the mesoporous catalysts could effectively inhibit the thermal sintering of the Ni particles. Furthermore, the sorts of coke species over the spent catalysts and the mechanism of catalyst deactivation were also carefully investigated. Therefore, the present ordered mesoporous CaO-Al2O3 composite oxide will be a potential carrier for Ni-based catalysts for CO2 reforming of CH4 and even other reactions.
机译：通过改进的蒸发诱导的自组装策略（EISA）设计和制备了有序的中孔CAO-AL2O3复合氧化物。所得的材料被用作基于NI的催化剂用于CH4的CO2改革。为了研究有序的中孔结构和基本修饰符在促进CH4反应的CO2重整催化特性方面的作用，分别合成了无有序的介孔结构和有序的介孔AL2O3的非中孔CAO-AL2O3。发现有序的介质结构和CAO碱性修饰符都在促进催化活性，稳定性和抑制碳沉积的100小时长期稳定性测试中都显示出显着影响。与传统的支撑催化剂相比，介孔催化剂的限制作用可以有效抑制Ni颗粒的热烧结。此外，还仔细研究了花费催化剂上的可乐物种以及催化剂失活的机理。因此，目前有序的介孔CAO-AL2O3复合氧化物将成为基于Ni的CO2 CH4甚至其他反应的二氧化碳催化剂的潜在载体。

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