TY - JOUR
T1 - Overcoming the kinetic and deactivation limitations of Ni catalyst by alloying it with Zn for the dry reforming of methane
AU - Velisoju, Vijay Kumar
AU - Virpurwala, Quaid Johar Samun
AU - Attada, Yerrayya
AU - Bai, Xueqin
AU - Davaasuren, Bambar
AU - Ben Hassine, Mohamed
AU - Yao, Xueli
AU - Lezcano, Gontzal
AU - Kulkarni, Shekhar Rajabhau
AU - Castaño, Pedro
N1 - KAUST Repository Item: Exported on 2023-08-31
Acknowledged KAUST grant number(s): BAS/1/1403
Acknowledgements: King Abdullah University of Science and Technology (KAUST) provided funding for this work: BAS/1/1403. The authors acknowledge the KAUST Supercomputing Laboratory for providing high-performance computational resources and the KAUST Core Labs for providing support.
PY - 2023/8/23
Y1 - 2023/8/23
N2 - Stimulated by the capacity of Zn to improve the adoption of CO2 and CH4, we doped a Ni-supported ZrO2 catalyst with Zn to enhance its performance and stability in the dry reforming of methane. We prepared a set of catalysts with different Ni:Zn:Zr proportions and conducted extensive ex situ and in situ characterizations to prove that a Ni–Zn alloy was formed at 750 °C under reductive conditions. Combining a tailored morphology of the alloy nanoparticles, strong metal–support (ZnO–ZrO2) interactions, and additional oxygen vacancies created by Zn inclusion resulted in an enhanced catalyst with 15% higher initial activity and higher stability for over 100 h on stream than Zn-free catalyst. Our experimental and modeling results demonstrated that the catalyst with adjusted Ni:Zn:Zr proportion improves the adsorption and reaction rates of CH4 and CO2 while extending its lifetime through enhanced coke precursor gasification compared to its Zn-free counterpart.
AB - Stimulated by the capacity of Zn to improve the adoption of CO2 and CH4, we doped a Ni-supported ZrO2 catalyst with Zn to enhance its performance and stability in the dry reforming of methane. We prepared a set of catalysts with different Ni:Zn:Zr proportions and conducted extensive ex situ and in situ characterizations to prove that a Ni–Zn alloy was formed at 750 °C under reductive conditions. Combining a tailored morphology of the alloy nanoparticles, strong metal–support (ZnO–ZrO2) interactions, and additional oxygen vacancies created by Zn inclusion resulted in an enhanced catalyst with 15% higher initial activity and higher stability for over 100 h on stream than Zn-free catalyst. Our experimental and modeling results demonstrated that the catalyst with adjusted Ni:Zn:Zr proportion improves the adsorption and reaction rates of CH4 and CO2 while extending its lifetime through enhanced coke precursor gasification compared to its Zn-free counterpart.
UR - http://hdl.handle.net/10754/693867
UR - https://linkinghub.elsevier.com/retrieve/pii/S2212982023001841
U2 - 10.1016/j.jcou.2023.102573
DO - 10.1016/j.jcou.2023.102573
M3 - Article
SN - 2212-9820
VL - 75
SP - 102573
JO - Journal of CO2 Utilization
JF - Journal of CO2 Utilization
ER -