Abstract
The effects of noble metals (Au, Ag, Pt, and Rh) on the Fe/HZSM-5 catalyst were investigated for the methane dehydroaromatization (MDA) reaction. Notably, the Au-promoted Fe/HZSM-5 catalyst exhibited the best performance, with improved catalytic stability. The presence of Au intensively enhanced the carburization degree of the Fe species by increasing the dispersion of Fe and promoting the dehydrogenation of methane. Correspondingly, X-ray diffraction patterns and X-ray photoelectron spectroscopy analysis of the spent catalysts confirmed that the clear presence of iron carbide for the Fe-Au catalyst, which resulted from the increased the carburization degree of Fe species. In addition, Au atoms deposited on Brönsted acid sites provided an adequate amount of acidity, leading to reduced coke formation. All these observations suggest that Au is a new and an efficient promoter for Fe/HZSM-5 catalyst with the MDA reaction.
| Original language | English |
|---|---|
| Article number | 117852 |
| Journal | Fuel |
| Volume | 274 |
| DOIs | |
| Publication status | Published - 2020 Aug 15 |
Bibliographical note
Funding Information:This research was supported by the C1 Gas Refinery Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Science, ICT & Future Planning ( 2016M3D3A1A01913252 ).
Publisher Copyright:
© 2020 Elsevier Ltd
Keywords
- Carburization
- Fe-Au/HZSM-5 catalyst
- Methane activation
- Methane dehydroaromatization
- Noble metal
ASJC Scopus subject areas
- General Chemical Engineering
- Fuel Technology
- Energy Engineering and Power Technology
- Organic Chemistry