Highly selective conversion of methanol to propylene: design of an MFI zeolite with selective-blockage of (010) surfaces

Dali Cai, Ning Wang, Xiao Chen, Yunhai Ma, Yilin Hou, Xinghua Li, Chengxi Zhang, Zhaohui Chen, Wenlong Song, Muhammad Tahir Arslan, Yiru Li, Yao Wang, Weizhong Qian, Fei Wei

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

As an important catalyst of methanol-to-propylene (MTP), ZSM-5 zeolite has an anisotropic diffusion path and large pore size, resulting in the formation of undesirable heavy aromatic by-products Herein, we developed a surface-specific silica deposition method to block straight channels of nanosized ZSM-5 crystals selectively. By such coating method, we can selectively suppress the yield of aromatics from the original 13% to 2.4% at 100% conversion of methanol. Trapped hydrocarbon pool species are directly confirmed by Aberration-Corrected S/TEM for the first time. Such a method of trapping and restricting hydrocarbon pool species in multiscale zeolite with 10-membered rings would significantly benefit its catalytic efficiency and olefin diffusion. Moreover, this is providing new methodologies for zeolite structure construction and will be greatly beneficial to industrial MTP process.
Original languageEnglish (US)
Pages (from-to)8096-8101
Number of pages6
JournalNanoscale
Volume11
Issue number17
DOIs
StatePublished - 2019

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