화학공학소재연구정보센터
Journal of Industrial and Engineering Chemistry, Vol.66, 396-403, October, 2018
Fe-Co/alumina catalysts for production of high calorific synthetic natural gas: Effect of Fe/Co ratio
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The effect of the Fe/Co ratio on the catalytic performance of Fe.Co/alumina catalysts has been investigated in the production of high-calorific synthetic natural gas (SNG) from syngas. Fe.Co/alumina catalysts with different Fe/Co molar ratios were synthesized by the co-precipitation method and characterized using XRD, BET, H2-TPR, Raman, XAS, and XPS. At higher Fe/Co ratios (≥2), the calcined Fe- Co/alumina catalysts were mainly composed of α-Fe2O3 and CoFe2O4. The presence of Co improved the dispersion of iron oxides and the catalyst reducibility under H2 atmosphere. The Fe.Co/alumina catalysts partially formed FeCo alloys when they were reduced at 350 °C under H2. The formation of FeCo alloy destabilized the iron carbide phase and suppressed the carbon chain growth. These Fe-Co/alumina catalysts were efficient in producing high calorific SNG with a heating value of over 60 MJ/Nm3.
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