Journal
CATALYSIS LETTERS
Volume 66, Issue 3, Pages 161-167Publisher
BALTZER SCI PUBL BV
DOI: 10.1023/A:1019020211572
Keywords
methane dehydro-aromatization; Mo/HZRP-1 catalyst; NH3-TPD; Al-27 MAS NMR
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The dehydro-aromatization of methane over a Mo-modified penta-sil type high-silica zeolite containing phosphoric and rare earth oxide (abbreviated as Mo/HZRP-1) was investigated. As a modification of HZSM-5, HZRP-1 is also a good support for the preparation of Mo-based zeolite catalysts, and is active for methane dehydro-aromatization. Mo/HZRP-1 catalysts are more active at high Mo loadings compared with Mo/HZSM-5 catalysts. Al-27 MAS NMR spectra of Mo/HZRP-1 reveal that there are two kinds of framework Al in HZRP-1. It is suggested that only the tetrahedral coordinated Al atoms in the form of Al-O-Si species in the zeolite, in the proton forms, are responsible for the formation of aromatics.
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