Journal
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Volume 60, Issue 47, Pages 16874-16886Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.1c02164
Keywords
-
Categories
Funding
- National Natural Science Foundation of China [21872056]
- Natural Science Foundation of Guangdong Province [2021A1515010149]
- Guangzhou Municipal Science and Technology Project [20180410116]
- Science and Technology Planning Project of Guangdong Province [2015A020216002]
Ask authors/readers for more resources
Alloying nickel with a transition metal and stabilizing an active metal on bimodal support can effectively enhance carbon resistance for dry reforming of methane reaction. The study showed that the bimodal mesoporous alumina-supported Ni-Co alloy catalyst displayed improved carbon resistance compared to other catalysts, attributed to the suppression of methane dissociation and enhanced mass transport.
Alloying nickel with a transition metal and further stabilizing an active metal on bimodal support are regarded as a promising strategy to improve carbon resistance for dry reforming of methane (DRM) reaction. In this work, a bimodal mesoporous alumina-supported Ni-Co alloy catalyst (NiCo/MMAl) was prepared via the evaporation-induced self-assembly method and employed to catalyze DRM reaction. The promotive effect of Ni-Co alloy with a bimodal porous structure on the carbon resistance was investigated. The presence of Ni-Co alloy was confirmed on porous alumina. The NiCo/MMAl catalyst possessed two porous structures, a small-sized mesopore at 10 nm and a large-sized one at 40 nm. NiCo/MMAl exhibited enhanced carbon resistance, in which only 2.3% carbon formed on the catalyst surface, lower than a unimodal mesoporous alumina-supported NiCo catalyst (NiCo/MAl, 12%) and Ni catalyst (Ni/MAl, 24%). The kinetic study suggested that on the unimodal mesoporous alumina, alloying Ni with Co increased the activation energy of CH4 dissociation (similar to 66 kJ/mol) compared to Ni/MAl (51.7 kJ/mol), thus showing high activity for suppressing CH4 dissociation. In addition, the large-sized mesoporous structure on NiCo/MMAl favored mass transport. As a result, the enhanced carbon resistance for NiCo/MMAl was not only attributed to the suppression of CH4 dissociation by Ni-Co alloy but also to the promotive effect of the large-sized mesopore structure on enhancing mass transport.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available