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丙烷氧化脱氢VMgO催化剂活性位的研究
Study on Active Sites of VMgO Catalysts For OxidativeDehydrogenation of Propane

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丙烷氧化脱氢VMgO催化剂活性位的研究.pdf (203.7Kb)
Date
1998
Author
方智敏
翁维正
万惠霖
蔡启瑞
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  • 化学化工-已发表论文 [14237]
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Abstract
应用低温EPr等方法对比研究了浸渍法和硝酸盐法制备的两个系列VMgO催化剂的活性位.结果表明,只有在合适的制备条件下,生成了适量V4+离子的钒酸镁物相才具有较好的催化活性,含有适量V4+离子的正、焦钒酸镁可能是丙烷氧化脱氢制丙烯VMgO催化剂的活性相.含有V4+的Mg3V2O8活性相的表面活性位结构可能为V4+-O-Mg-O-V5+,含有V4+的α-Mg2V2O7活性相的表面活性位结构可能为V4+-O-V5+.
 
The active sites of VMgO catalysts prepared by impregnation and nitrate methods were investigated.The results indicated that only the Mg vanadates containing proper amount of V4+ions produced under the suitable preparation conditions demonstrated better catalytic activities, and thus Mg orthovanadate and pyrovanadate with proper amount of V4+ may be the active phases of VMgO catalysts For oxidative dehydrogenation of propane to propene.The surFace active site structure of Mg3V2O8 with V4+may be V4+OMgOV5+, and that of αMg2V2O7 with V4+ may be V4+OV5+.
 
Citation
厦门大学学报(自然科学版),1998,(4):61-67
URI
https://dspace.xmu.edu.cn/handle/2288/107442

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