Carbon-confined Ni based catalyst by auto-reduction for low-temperature dry reforming of methane. (1st May 2023)

• Record Type: Journal Article
• Authors: Shen, Dongyang; Wang, Jie; Bai, Yue; Lyu, Shuai; Zhang, Yuhua; Li, Jinlin; Li, Lin; Wang, Guanghui
• Is Part Of: Fuel. Volume 339(2023)
• Publication Date: 2023-05-01
• Subjects: Carbon dioxide reforming of methane -- Carbonising -- Carbon layers Confinement effect; Fuel -- Periodicals; Coal -- Periodicals; Coal; Fuel; Periodicals; 662.6
• DOI: 10.1016/j.fuel.2023.127409
• Languages: English
• ISSNs: 0016-2361

Abstract

Highlights: Carbon-confined Ni based catalysts by auto-reduction were constructed by carbonising metal–organic frameworks precursor. Catalytic structure and properties depend on carbonising temperature. Ni@C/MCF-750 demonstrated excellent catalytic performance at a relatively low temperature. The reaction-induced metal sintering and coking were successfully suppressed by carbon confinement. Abstract: Producing syngas from dry reforming of methane is fascinating but challenging because of coking and sintering. Here, carbonising Ni based catalysts by auto-reduction are fabricated and applied to low-temperature DRM reaction. The catalytic structure–function relationship including the effects of carbonising temperature on carbon structure is investigated and rendered in detail. Ultimately, the carbon-confined catalysts boost DRM reaction at a relatively low temperature of 600 °C and effectively convert greenhouse gases to syngas. The carbon layers obtained by carbonising metal–organic frameworks (MOFs) precursor act as a shell protecting fine Ni nanoparticles (NPs) from reaction-induced reshaping, agglomeration, and coking. This work not only identifies an energy-conserving process for the utilization of greenhouse gases, but also reveals the sintering and coking can be restricted by carbon confinement effect.