Enhancement of mass transfer and coke resistance in DRM through hierarchical porous catalysts

Abstract

Dry reforming of methane (DRM) is one of the feasible strategies for carbon capture and utilization. However, DRM has a high tendency toward coking, which is restricted to industrial applications. The primary cause of coking in DRM is the limitation of mass transfer inside porous catalysts. To overcome this limitation, optimizing the pore structure of the porous catalyst becomes crucial. Hierarchical pore structure has received considerable attention in recent years due to its superior mass transfer performance. Therefore, this chapter focuses on the structure-performance relationship of hierarchical porous catalysts in DRM. Specifically, two types of porous catalysts, namely porous pellet and open-cell foam, are examined. The impacts of various hierarchical pore structure parameters on the catalytic activity and coke resistance are investigated. The findings offer a theoretical foundation and technical guidance for the design of porous catalysts with hierarchical pore structures.