Journal
APPLIED CATALYSIS A-GENERAL
Volume 598, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcata.2020.117589
Keywords
Syngas to aromatics; Fe/HZSM-5; Mo promoter; Synergistic effect; Bronsted acid sites
Categories
Funding
- National Natural Science Foundation of China [51861145102, 21978225]
- National Key Research and Development Plan of China [2018YFE0125200]
- Guangdong Provincial Science and Technology Project [2019A050510031]
- Science and Technology program of Shenzhen [JCYJ20180302153928437, JCYJ20190808150418994]
- Fundamental Research Fund for the Central Universities [2042019kf0221]
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Direct synthesis of aromatics from syngas was investigated over a Mo-modified Fe/HZSM-5 bifunctional catalyst. The strong interaction of Fe-Mo promoted the dispersion of Fe species, strengthening the synergistic effect between iron carbides and acid sites in this reaction and promoting the formation of aromatics. Compared with the Fe/HZSM-5 catalysts modified by Zn, Mn, Pd, Na and K, MoFe/HZSM-5 displayed the optimal catalytic performance with a high aromatics productivity of 62.5 mmol(aromatics)/(g(Fe) h. Especially, the increase of Mo loading decreased the external Bronsted acidity of catalyst, promoting the formation of benzene, toluene and xylene in aromatics, whereas suppressing the fraction of heavy aromatics.
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