摘要
通过活性测试及催化剂表征研究了用于丁烷氧化制顺酐VPO催化剂的反应控制步骤-脱氢反应的机理,分析了(VO)2P2O7(020)面的催化脱氢过程,同时对β-VOPO4相在催化脱氢过程中的作用进行了研究。丁烷氧化制顺酐VPO催化剂中,最重要的活性相是(VO)2P2O7,而(020)面是(VO)2P2O7的活性面。与此同时,β-VOPO4相也是重要的活性相,只有在β-VOPO4相与(VO)2P2O7协同作用下,方可对丁烷分子进行较适当地活化,使脱氢作为控制步骤能够顺利进行。
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)2P2O7 phase and the function of β-VOPO4 phase in this process have been discussed.The results showed that the predominant active phase is (VO)2P2O7 for the manufacture of maleic anhydride from butane oxidation,and the (020)plane was as the active plane on (VO)2P2O7,where all related surface reactions and transfer processes were taken place,and the β-VOPO4 phase played synergistic role during these reactions.Only under the interaction between phases (VO)2P2O7 and β-VOPO4,butane could be activated on surface of catalyst appropriately,and the dehydrogenation process could be carried out smoothly.
出处
《化学工业与工程》
CAS
2004年第1期29-32,共4页
Chemical Industry and Engineering
