Dry reforming of methane provides a feasible solution to reduce the greenhouse gas via simultaneously converting CH4 and CO2 into useful syngas. However, conventional Ni-based catalysts suffer from deactivation due to serious carbon coking during dry reforming of methane process. Herein, we propose a concept by reducing crystallinity of formed carbon and accelerating carbon oxidization to enhance the coking resistance of Ni-based catalysts. This concept was conducted through a boron nitride coating strategy over reducible oxides supported Ni catalysts, in which the increased carbon diffusion barrier, induced by the boron nitride coating, would lead to more amorphous carbon. While the amorphous carbon was efficiently gasified by active oxygen species derived from reducible oxides. Our findings demonstrate that the coke issues can be solved by building a dynamic carbon removal route.
Key words
Dry reforming of methane/Ni-based catalysts/Boron nitride/In-situ Raman/CO(2 )conversion/NI/AL2O3 CATALYSTS/CARBON DEPOSITION/PERFORMANCE/OXYGEN/PRECURSOR/SURFACE/CH4
NSTL
Elsevier