Identification of active structure and catalytic efficiency of MCM-22 zeolite detemplated by two different processes
Journal of Porous Materials, ISSN: 1573-4854, Vol: 28, Issue: 5, Page: 1439-1448
2021
- 27Citations
- 7Captures
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Article Description
This study attempts to identify the active structure and the catalytic efficiency of MCM-22 zeolite after the successful removal of pre-synthesized MCM-22(P) template by two different methods. The MCM-22(P) zeolite was firstly synthesized by hydrothermal process with a SiO/AlO ratio of 50, and its 2D layered hexamethyleneimine (HMI) precursor template was removed by (i) thermal calcination at high temperature (550 °C) to obtain the MCM-22(C), and (ii) oxidation with HO treatment at low temperature (90 °C) to obtain the MCM-22(HO). The structural characteristics of MCM-22(C) and the MCM-22(HO) were identified by XRD, N absorption/desorption, FTIR, NH-TPD and Al MAS-NMR. The catalytic performance of MCM-22(C) and MCM-22(HO) loaded by 20 wt% zinc nanoparticles were examined through a Friedel-Grafts (FC) alkylation of benzene with benzyl chloride in a liquid phase environment. It was found that Zn-MCM-22(HO) was more efficient in FC alkylation reaction in comparison with Zn-MCM-22(C) for the formation of intercrystal pores due to the inhibitory influence of silonal group condensation on the external surface of MCM-22 crystals.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85107283553&origin=inward; http://dx.doi.org/10.1007/s10934-021-01098-w; https://link.springer.com/10.1007/s10934-021-01098-w; https://link.springer.com/content/pdf/10.1007/s10934-021-01098-w.pdf; https://link.springer.com/article/10.1007/s10934-021-01098-w/fulltext.html; https://dx.doi.org/10.1007/s10934-021-01098-w; https://link.springer.com/article/10.1007/s10934-021-01098-w
Springer Science and Business Media LLC
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