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Ni catalysts for dry methane reforming prepared by A-site exsolution on mesoporous defect spinel magnesium aluminate
Applied Catalysis A: General ( IF 4.7 ) Pub Date : 2020-06-09 , DOI: 10.1016/j.apcata.2020.117694
Eunkyung Cho , Young-Hee Lee , Hyunjoung Kim , Eun Jeong Jang , Ja Hun Kwak , Kyubock Lee , Chang Hyun Ko , Wang Lai Yoon

In dry methane reforming, the selection of a suitable support is critical due to coke formation and metal particle sintering. We prepared two types of mesoporous defect spinel magnesium aluminate support, namely DS09, with a Mg/Al molar ratio (Mg/Al) of 0.1, and DS19 with Mg/Al = 0.24. Each support has a high surface area, large mesopore volume, and a phase between its defect spinel (Mg0.388Al2.408O4) and spinel (MgAl2O4) structures. Magnesium aluminate with a Mg/Al of 0.5 (MG30), which has a low surface area and is devoid of mesopores, was used as the reference support. Ni was supported on DS09 (Ni-DS09) and DS19 (Ni-DS19) by A-site exsolution. These catalysts display significant advantages over Ni-supported MG30 (Ni-MG30); Ni-DS19 exhibited a higher coke resistance than Ni-DS09, due to its lower acidity, while DS19, which contains a defect spinel structure, optimized acidity, and well-developed mesopores, was the best support for the DMR.



中文翻译:

介孔缺陷尖晶石型铝酸镁铝上A位析出制备的干甲烷重整用镍催化剂

在干甲烷重整中,由于焦炭形成和金属颗粒烧结,选择合适的载体至关重要。我们制备了两种类型的介孔缺陷型尖晶石铝酸镁载体,即Mg / Al摩尔比(Mg / Al)为0.1的DS09和Mg / Al = 0.24的DS19。每个支撑物具有高的表面积,大的中孔体积以及在其缺陷尖晶石(Mg 0.388 Al 2.408 O 4)和尖晶石(MgAl 2 O 4)之间的相)结构。Mg / Al为0.5(MG30)的铝酸镁具有较低的表面积且没有中孔,被用作参考载体。通过A站点放样在DS09(Ni-DS09)和DS19(Ni-DS19)上支持Ni。这些催化剂比镍负载的MG30(Ni-MG30)表现出显着的优势。Ni-DS19由于其较低的酸度而比Ni-DS09表现出更高的耐焦炭性,而具有缺陷尖晶石结构,优化的酸度和发达的中孔的DS19是DMR的最佳支持。

更新日期:2020-06-23
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