TY  - JOUR
AU  - Al-Eid, Manal
AU  - Ding,, Lianhui
AU  - Sewdan, Donya
AU  - AL-Shafei, Emad
AU  - Al-Ghamdi, Rasha
AU  - Alqarawi, Abdulaziz
AU  - Alnaimi, Essa
PY  - 2022
DA  - 2022/10/17
TI  - Effect of ZSM-5 Particle Size and Framework Silica-to-Alumina Ratio on Hexane Aromatization
JO  - Catalysis Research
SP  - 035
VL  - 02
IS  - 04
AB  - Parent ZSM-5 and Ga-modified ZSM-5 catalysts with different Si/Al ratios and particle sizes were prepared. The physicochemical properties of the prepared catalysts were investigated by performing X-ray powder diffraction analysis, BET surface area analysis, and NH3-TPD analysis. The performance of the aromatization reaction of the prepared catalysts was evaluated with 1-hexane as a model compound. The zeolite catalysts with a low SiO2/Al2O3 ratio possessed better activity than those with a high SiO2/Al2O3 ratio. Ga modification significantly improved the catalyst aromatization selectivity. Through aromatization, the acid sites of Ga-modified nano-sized zeolites promoted the selective conversion of produced olefin to aromatics by removing H-atoms. For the parent ZSM-5 and Ga-modified catalysts, the catalyst stability increased with an increase in the SiO2/Al2O3 molar ratio. The nano-sized ZSM-5 catalyst with a high SiO2/Al2O3 ratio exhibited better catalytic stability than the microscale ZSM-5, and the nano-sized catalyst with a low SiO2/Al2O3 ratio showed very low stability.
SN  - 2771-490X
UR  - https://doi.org/10.21926/cr.2204035
DO  - 10.21926/cr.2204035
ID  - Al-Eid2022
ER  -