Turkish Journal of Chemistry
Abstract
Modified mesoporous HZSM-5 catalysts were prepared by controlled desilication using a mixture of NaOH and TPAOH (tetrapropylammonium hydroxide) and impregnation of metals (Mn, Ce, and Ba) and metalloid B. The catalytic performances of all prepared catalysts for methanol to propylene (MTP) reaction were evaluated in a fixed bed reactor under atmospheric pressure at 480 \textdegree C. The parent and modified catalysts were characterized by XRD, ICP-OES, FE-SEM, NH$_{3}$-TPD, FT-IR, BET, and TGA techniques. The catalyst loaded with 2 wt.% manganese on desilicated HZSM-5 demonstrated the best catalytic performance in terms of the highest selectivity of C$_{2}^{=}$ to C$_{4}^{=}$ olefins (about 93%) and about 52% selectivity of propylene at near 99% methanol conversion in the MTP reaction for a long operation (264 h). The improved catalytic performance can be attributed to the high surface area and the formation of mesopores on the zeolite crystals in conjunction with the appropriate acidity.
DOI
10.3906/kim-1804-26
Keywords
Nanostructured ZSM-5, mesoporous, methanol to propylene, desilication, impregnation
First Page
1640
Last Page
1662
Recommended Citation
SARAVI, FATEMEH YAHYAZADEH and TAGHIZADEH, MAJID
(2018)
"Synergetic effect of Mn, Ce, Ba, and B modification and moderate desilication of nanostructured HZSM-5 catalyst on conversion of methanol to propylene,"
Turkish Journal of Chemistry: Vol. 42:
No.
6, Article 14.
https://doi.org/10.3906/kim-1804-26
Available at:
https://journals.tubitak.gov.tr/chem/vol42/iss6/14
