Highly selective conversion of methanol to propylene: design of an MFI zeolite with selective-blockage of (010) surfaces
Arslan, Muhammad Tahir
KAUST DepartmentAdvanced Membranes and Porous Materials Research Center
Physical Science and Engineering (PSE) Division
Permanent link to this recordhttp://hdl.handle.net/10754/631809
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AbstractAs 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.
CitationCai D, Wang N, Chen X, Ma Y, Hou Y, et al. (2019) Highly selective conversion of methanol to propylene: design of an MFI zeolite with selective-blockage of (010) surfaces. Nanoscale. Available: http://dx.doi.org/10.1039/c8nr10371b.
SponsorsThis research is funded by the National Natural Science Foundation of China (91434122), National Key R&D Program of China (2017YFB0602204 and 2018YFB0604803). All the calculations are supported by Tsinghua National Laboratory for Information Science and Technology (National Research Center of Information Science and Technology, Beijing). We thank Prof. Yu Han at KAUST for his advice.
PublisherRoyal Society of Chemistry (RSC)