Oxidative Dehydrogenation of Alkanes using Oxygen-Permeable Membrane Reactor  

氧渗透膜反应器的烷烃氧化脱氢

作　　者：阎瑞强[1] 刘卫[3] 宋春林[2] 

机构地区：[1]台州学院材料工程系,台州318000 [2]西南大学材料与能源学部,重庆400715 [3]中国科学技术大学材料科学与工程系,中国科学院能量转换材料重点实验室,合肥230026

出　　处：《Chinese Journal of Chemical Physics》2014年第6期690-696,I0004,共8页化学物理学报（英文）

摘　　要：The oxidative dehydrogenation （ODH） reactions of ethane and propane were investigated in a catalytic membrane reactor, incorporating oxygen-permeable membranes based upon La2Ni0.9V0.1O4＋δor Ba0.5Sr0.5Co0.8Fe0.2O3-δ. As a compromise between the occurrence of a measureable oxygen flux and excessive homogenous gas phase reactions, the measurements were conducted at an intermediate temperature, either at 550 or 650 oC. The results show the dominating role of the oxygen flux across the membrane and available sites at the membrane surface in primary activation of the alkane and, hence, in achieving high alkane conversions. The experimental data of ODH of propane and ethane on both membrane materials can be reconciled on the basis of Mars-van Krevelen mechanism, in which the alkane reacts with lattice oxygen on the membrane surface to produce the corresponding olefin. It is further demonstrated that the oxygen concentration in the gas phase and on the membrane surface is crucial for determining the olefin selectivity.

关 键 词：Oxidative dehydrogenation Membrane reactor Oxygen-permeable membrane 

分 类 号：O[理学]