Synthesis of nanosheet epitaxial growth ZSM-5 zeolite with increased diffusivity and its catalytic cracking performance

Abstract

The nanosheet epitaxial growth hierarchical zeolites, that is, the nanosheet MFI epitaxially grows on the surface of bulk seed, well maintain the diffusion advantages of the 2D structure while increasing...

Synthesis of Two-Dimensional Zeolite Nanosheets Applied to the Catalytic Cracking of a Waste Cooking Oil Model Compound to Produce Light Olefins

“…Coke was formed by polymerization, cyclization, and dehydrogenation reactions and eventually covered active sites on the catalyst while also blocking access to the pores, causing the catalyst to become less active. , The mesopores in the HNZSM-5 served as storage sites for coke during the catalytic process, which prevented the clogging of micropores and improved the anticoking ability of the catalyst. The mesopores also significantly enhanced the diffusion performance of the material, thus reducing the probability of side reactions and further extending the life of the catalyst. , The TGA results (Figure ) for the two catalysts after 12 h of reaction under the same conditions show that HNZSM-5 contained more coke than the CZSM-5. Even so, the former maintained its catalytic activity during the subsequent operation to a greater extent.…”

“…The mesopores also significantly enhanced the diffusion performance of the material, thus reducing the probability of side reactions and further extending the life of the catalyst. 43,44 The TGA results (Figure 11) for the two catalysts after 12 h of reaction under the same conditions show that HNZSM-5 contained more coke than the CZSM-5. Even so, the former maintained its catalytic activity during the subsequent operation to a greater extent.…”