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Performance Comparison of Two Newly Developed Bimetallic(X-Mo/Al2O3, X=Fe or Co) Catalysts for Reverse Water Gas Shift Reaction

Performance Comparison of Two Newly Developed Bimetallic(X-Mo/Al_2O_3, X=Fe or Co) Catalysts for Reverse Water Gas Shift Reaction
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摘要 The performance of the two newly developed bimetallic catalysts based on the precursor, Mo/Al_2O_3, was compared for reverse water gas shift(RWGS) reaction. The structures of the precursor and the catalysts were studied using X-ray diffraction(XRD), Brunauer–Emmett–Teller(BET) analysis, inductively coupled plasma-atomic emission spectrometry(ICP-AES), CO chemisorption, temperature programmed reduction of hydrogen(H_2-TPR) and scanning electron microscopy(SEM) techniques. The activity of Fe-Mo and Co-Mo catalysts was compared in a fixed bed reactor at different temperatures. It is shown that the Co-Mo catalyst has higher CO_2 conversion at all temperature level. The time-on-stream(TOS) analysis of the activity of catalysts for the RWGS reaction was carried out over a continuous period of 60h for both catalysts. The Fe-Mo/Al_2O_3 catalyst exhibits good stability within a period of 60h, however, the Co-Mo/Al_2O_3 is gradually deactivated after 50h of reaction time. Existence of(Fe_2(MoO4_))_3 phase in Fe-Mo/Al_2O_3 catalyst makes this catalyst more stable for RWGS reaction. The performance of the two newly developed bimetallic catalysts based on the precursor, Mo/Al2O3, was compared for reverse water gas shift(RWGS) reaction. The structures of the precursor and the catalysts were studied using X-ray diffraction(XRD), Brunauer–Emmett–Teller(BET) analysis, inductively coupled plasma-atomic emission spectrometry(ICP-AES), CO chemisorption, temperature programmed reduction of hydrogen(H2-TPR) and scanning electron microscopy(SEM) techniques. The activity of Fe-Mo and Co-Mo catalysts was compared in a fixed bed reactor at different temperatures. It is shown that the Co-Mo catalyst has higher CO2 conversion at all temperature level. The time-on-stream(TOS) analysis of the activity of catalysts for the RWGS reaction was carried out over a continuous period of 60h for both catalysts. The Fe-Mo/Al2O3 catalyst exhibits good stability within a period of 60h, however, the Co-Mo/Al2O3 is gradually deactivated after 50h of reaction time. Existence of(Fe2(MoO4))3 phase in Fe-Mo/Al2O3 catalyst makes this catalyst more stable for RWGS reaction.
出处 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2016年第1期51-58,共8页 中国炼油与石油化工(英文版)
基金 the Iranian Nano Technology Initiative Council and the Petroleum University of Technology for financial support
关键词 RWGS reaction bimetallic catalysts activity stability Co-Mo/Al2O3 水煤气变换反应 双金属催化剂 性能比较 电感耦合等离子体原子发射光谱 开发 钴钼催化剂 铁钼催化剂
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