Authors
Nakisa Yaghobi, Milad Rasouli
Publication date
2023/7/30
Journal
Hzsm-5 Catalyst for Aromatics Synthesis from Co2 Hydrogenation
Description
Platinum-impregnated ZnO/HZSM5 was synthesized and investigated in direct hydrogenation of CO2 to aromatics. Methanol-mediated pathway was applied for hydrogenation reactions. The amount of zeolite acidity indicated a key role in CO2 conversion and aromatics selectivity. NH3-TPD analysis suggested that introduction of both ZnO and Pt increased the strong acid sites and conversly decreased the weak acid sites. Furthermore, some new acidic sites were appeared in zeolite structure after ZnO loading. XPS results proposed that most of the zinc species located on the surface of the zeolite as oxide form, whereas, the platinum is located in the catalysts in both metallic and oxide form. However, 0.1 wt% Pt-8 wt% Zn/HZSM5 catalyst denoted as (P (8) Z/HZ5) showed the best results for CO2 conversion (88.3%) and aromatics selectivity (69.2%) with low CO selectivity (9.8%) compared to other zeolites.
Scholar articles
N Yaghobi, M Rasouli - Hzsm-5 Catalyst for Aromatics Synthesis from Co2 …, 2023