Highly selective conversion of methanol to propylene: design of an MFI zeolite with selective-blockage of (010) surfaces
Type
ArticleAuthors
Cai, DaliWang, Ning
Chen, Xiao
Ma, Yunhai
Hou, Yilin
Li, Xinghua
Zhang, Chengxi
Chen, Zhaohui
Song, Wenlong
Arslan, Muhammad Tahir
Li, Yiru
Wang, Yao
Qian, Weizhong
Wei, Fei
KAUST Department
Advanced Membranes and Porous Materials Research CenterPhysical Science and Engineering (PSE) Division
Date
2019Permanent link to this record
http://hdl.handle.net/10754/631809
Metadata
Show full item recordAbstract
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.Citation
Cai 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.Sponsors
This 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.Publisher
Royal Society of Chemistry (RSC)Journal
Nanoscaleae974a485f413a2113503eed53cd6c53
10.1039/c8nr10371b