首页|Te-doped MoV-Oxide(Ml phase)for ethane ODH.The role of tellurium on morphology,thermal stability and catalytic behaviour
Te-doped MoV-Oxide(Ml phase)for ethane ODH.The role of tellurium on morphology,thermal stability and catalytic behaviour
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Undoped and Te-doped MoV-Oxide(Ml phase)catalysts have been prepared hydrothermally(Te/Mo ratio in the synthesis gel from 0 to 0.17; and heat-treated at 400 or 600° C in N2 atmosphere),characterized by several physicochemical techniques and tested in the oxidative dehydrogenation(ODH)of ethane.The morphology and microporosity of the catalysts,the nature of V-species on the catalyst surface and the catalytic performance strongly depend on the composition and the heat-treatment temperature.When calcined at 400° C,the selectivity to ethylene decreases when the amount of tellurium increases,whereas when heat treated at 600° C,the selectivity to ethylene increases when the Te-loading increases.These trends have been explained on the basis of the good correlation between selectivity to ethylene and the concentration of V~(4+)species on the surface of catalysts,in which the most selective catalyst is that prepared with a Te/Mo ratio of 0.17 and heat-treated at 600℃.
EthyleneEthane ODHMo-V-O oxideMl phaseTellurium
Agustin de Arriba、Benjamin Solsona、Ester Garcia-Gonzalez
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Institute de Tecnologia Qutmica,Universitat Politecnica de Valencia-Consejo Superior de Investigaciones Cientificas,Avenida de los Naranjos s/n,46022 Valencia,Spain
Departament dEnginyeria Qutmica,Universitat de Valencia,C/Dr.Moliner 50,46100 Burjassot,Valencia,Spain
Departamento Qutmica Inorgdnica,Facultad de Ciencias Qufmicas,Universidad Compkitense,28040 Madrid,Spain
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