New Design and Construction of Hierarchical Porous Ni/SiO2 Catalyst with Anti‐sintering and Carbon Deposition Ability for Dry Reforming of Methane

Abstract Recently, low‐resistance to sintering and carbon deposition used in dry reforming of methane (DRM) limits their industrial application. In this study, we synthesized the better anti‐carbon deposition performance of a novel Ni/SiO 2 catalyst which has hierarchical porous flower‐like structure by hydrothermal method. A series of characterizations were carried out by different test methods, and the results confirmed that the material had typical hierarchical porous structure, high specific surface areas, and strong metal‐support interaction. The catalyst activity tests at 700 °C in 40 h reaction manifested that CO 2 and CH 4 conversions of the flower‐like structure of Ni/SiO 2 (F‐Ni/SiO 2 ) (87.44% and 79.56%) are higher than that of Ni/SiO 2 by the conventional impregnation method (C‐Ni/SiO 2 ) (71.79% and 62.30%). The main reasons can be explained that the large specific surface area, Ni particles were well dispersed on the support surface, and the interaction between the active metal and support of the flower‐like structure of F‐Ni/SiO 2 catalyst, have better stability and catalytic performance. Meanwhile, the TG result also showed that the F‐Ni/SiO 2 catalyst had better anti‐carbon deposition performance than the traditional catalyst, which leading to a higher catalytic activity.