Abstract On known VPO catalyst for butane oxidation to maleic anhydride,the mechanism of butane dehydrogenation on the surface of catalyst,which was regarded as the rate determining step has been studied,and the dehydrogenation of butane occurring on the (020)plane of (VO)��2P��2O��7 phase and the function of ��-VOPO��4 phase in this process have been discussed.The results showed that the predominant active phase is (VO)��2P��2O��7 for the manufacture of maleic anhydride from butane oxidation,and the (020)plane was as the active plane on (VO)��2P��2O��7,where all related surface reactions and transfer processes were taken place,and the ��-VOPO��4 phase played synergistic role during these reactions.Only under the interaction between phases (VO)��2P��2O��7 and ��-VOPO��4,butane could be activated on surface of catalyst appropriately,and the dehydrogenation process could be carried out smoothly.����
JIANG Hao-xi,LI Yong-hui,LIU Xiao-ya��.Study on Active Phases of the Catalyst for Butane Oxidationto Maleic Anhydride[J] Chemcial Industry and Engineering, 2004,V21(1): 29-32
2004, Vol. 21 
