Dry reforming of methane for syngas production over attapulgite-derived MFI zeolite encapsulated bimetallic Ni-Co catalysts

• Published in: Applied catalysis. B, Environmental Environmental, 2023-03, Vol.322, p.122088, Article 122088
• Main Authors: Liang, Defang, Wang, Yishuang, Chen, Mingqiang, Xie, Xuanlan, Li, Chang, Wang, Jun, Yuan, Liang
• Format: Article
• Language: English
• Subjects: Alloy effect; Attapulgite; DRM; Nickel-based catalyst; Syngas
• ISSN: 0926-3373; 1873-3883
• DOI: 10.1016/j.apcatb.2022.122088

Dry reforming of methane (DRM) shows bright prospects for the treatment and value-added utilization of greenhouse gas, and catalyst inactivation has been a long-standing grand challenge for this process. Here, a catalyst of attapulgite-derived MFI (ADM) zeolite encapsulated Ni-Co alloys was synthesized using a one-pot method. Characterization results demonstrated that the Ni-Co alloys, which could be stably presentduring DRM process, favored the formation of electron-rich Ni metal sites and thus significantly enhanced C-H bond breaking ability. Meanwhile, the ADM zeolite not only firmly anchored metallic sites by pore or layer confinement, but also provided abundant CO2 adsorption/activation centers. These contributed to the improved anti-sinter and anti-coke ability as well as superior DRM activity of 10Ni1Co@ADM-0.1 catalyst. This work is expected to supply guidance for the development of clay-based metallic Ni catalysts and its application in DRM for syngas production. [Display omitted] •Attapulgite-derived MFI zeolite encapsulated Ni-Co alloys were synthesized.•The existence of Ni-Co alloys promoted the rapture of C-H bonds in methane.•The ADM zeolite layer supplied abundant CO2 adsorption/activation centers.•10Ni1Co@ADM-0.1 catalyst performed high anti-sinter and anti-coke abilities.•10Ni1Co@ADM-0.1 catalyst demonstrated the superior DRM performances.