Journal
FUEL
Volume 228, Issue -, Pages 1-9Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2018.04.151
Keywords
Syngas to aromatics; Fe/HZSM-5; Synergistic effect; Iron loading; Fischer-Tropsch synthesis
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Funding
- Science and Technology project of Guangdong Province [2016A050502037]
- National Natural Science Foundation of China [91545109]
- Fundamental Research Funds for the Central Universities [2042017kf0173, 2042017kf0200]
- Synfuels China Technology Co., Ltd.
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A bifunctional Fe/HZSM-5 catalyst was prepared for direct synthesis of aromatics from syngas. The influence of iron loading on acidity and syngas to aromatics (STA) performances over the Fe/HZSM-5 catalysts was studied. An increasing iron loading increased the amounts of active iron species, enhancing synergistic effect of active iron sites and HZSM-5 for the STA reaction. Higher iron loading in the Fe/HZSM-5 catalyst resulted in the decrease of Bronsted acid sites and increase of Lewis acid sites, promoting the formation of C-5(+) hydrocarbons and aromatics selectivity via weakening the cracking ability and enhancing the dehydrogenation property of HZSM-5. Excessive adding of iron loading induced the formation of graphitic carbon deposition, leading to a decrease of catalytic activity and stability.
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