Inorganic Chemicals Industry >
Effect of confined catalyst Ni@S2 on performance of methane dry reforming reaction
Received date: 2024-04-29
Online published: 2025-02-20
The dry reforming reaction（DRM） of methane can rationally utilize two greenhouse gases of CO2 and CH4 to produce environmentally friendly and clean fuels of CO and H2.However，the nickel-based catalysts used in this process are susceptible to carbon accumulation and sintering at high temperatures，which makes it difficult to satisfy the demands of industrial production.Based on this，domain-limited Ni@S2（Silicalite-2） catalysts were prepared by the grinding crystallization method.The results showed that the domain-limited Ni@S2 catalyst exhibited an olivine-like crystal structure with a large specific surface area and a narrow pore size distribution，and the NiO nanoparticles were uniformly dispersed in the Silicalite-2 skeleton，with an average NiO grain size of about 4.63 nm.After the dry reforming reaction at 700 ℃ for 6 h［Fin=40 mL/min，V（CH4）:V（CO2）:V（Ar）=44:44:12］，compared with the loaded catalyst 10Ni/SiO2，the confined 10Ni@S2 catalysts exhibited excellent catalytic activity and carbon deposition resistance，the instantaneous conversion of CH4 was increased from 65.51% to 91.91%，the instantaneous conversion of CO2 was increased from 71.89% to 91.14%，and the carbon deposition rate was decreased from 16.30% to 1.20%.The excellent catalytic performance and stability of the catalyst were due to the limited domain structure，which avoided the sintering of the active component，reduced the particle size of NiO，and improved the interaction between the metal and the support.This study opened up a new direction for the preparation of low cost and high stability nickel-based catalysts.
ZHU Jicheng , YANG Qixin , LIANG Haoquan , WANG Zengkun , OUYANG Fugui , DI Jing , GAI Xikun . Effect of confined catalyst Ni@S2 on performance of methane dry reforming reaction[J]. Inorganic Chemicals Industry, 2025 , 57(2) : 138 -146 . DOI: 10.19964/j.issn.1006-4990.2024-0242
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