Subject Area物理化学
CO2 utilization as an oxidant in the dehydrogenation of ethylbenzene to styrene over iron oxide-based catalysts
Chen GL(陈桂丽); Ji M(纪敏); Wang JH(王军虎); Wang XK(王新葵); Zhang T(张涛)
Conference Name7th Asia Pacific Congress on Sustainable Energy & Environmental Technologies
Conference Date2009-10-15
Conference Place中国
Alternative Title铁催化剂上乙苯脱氢合成苯乙烯反应中二氧化碳作为氧化剂的利用
Funding Organization中国石油大学
AbstractIn view of the problem of global warming, the utilization of CO2 has aroused extensive concern. Recently, the catalytic process of ethylbenzene dehydrogenation (EBD) with CO2 to styrene has been emerging, since CO2 offer several advantages such as acceleration of the reaction rate, enhancement in product selectivity, alleviation of thermodynamic equilibrium limitations, suppression of total oxidation, and prolonging of catalyst life. In the present paper, Fe active species in the catalyst for EBD with CO2 were studied. Three catalysts of Fe2O3-MgO/-Al2O3, Fe2O3/MgAl2O4 and MgFe0.1Al1.9O4 with the same Mg/Fe/Al molar ratio were prepared impregnation and sol-gel methods. The catalyst properties were characterized using techniques such as N2 adsorption/desorption (BET), X-ray diffraction (XRD), thermogravimetric (TG), energy dispersive X-ray (EDX), Fourier transform infrared spectroscopy (FT-IR), 57Fe Mössbauer spectroscopy (MS), temperature programmed reduction (TPR), and temperature-programmed desorption of NH3 and CO2 (NH3-TPD and CO2-TPD). It was found that Fe3+ species incorporated in spinel framework entirely, which can resist sintering and reduction effectively, is responsible for high catalytic activity and stability of MgFe0.1Al1.9O4 under reaction conditions. Moreover, the weak surface acidity of MgFe0.1Al1.9O4 is beneficial to prevent the carbon formation. This exploratory research might motivate us to explore the possibility of CO2 utilization on different catalytic processes.
Document Type会议论文
Corresponding AuthorJi M(纪敏); Wang JH(王军虎)
Recommended Citation
GB/T 7714
Chen GL,Ji M,Wang JH,et al. CO2 utilization as an oxidant in the dehydrogenation of ethylbenzene to styrene over iron oxide-based catalysts[C],2009:37/1.
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