| 酸碱性和氧化还原性对负载型钒基催化剂丙烷氧化脱氢性能的影响 |
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| 引用本文： | 陈明树,翁维正,许翩翩,万惠霖.酸碱性和氧化还原性对负载型钒基催化剂丙烷氧化脱氢性能的影响[J].天然气化工,1998(5). |
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| 作者姓名： | 陈明树 翁维正 许翩翩 万惠霖 |
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| 作者单位： | 厦门大学化学系物理化学研究所固体表面物理化学国家重点实验室 |
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| 基金项目： | 国家自然科学基金,国家教委博士点基金 |
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| 摘 要： | 用ＸＲＤ、Ｒａｍａｎ、ＴＰＲ和Ｐｙ－ＩＲ表征乙酰丙酮络钒法制备的不同氧化物和磷酸盐负载的钒氧化物催化剂，结果表明，钒氧化物在载体ＭｇＯ、Ａｌ２Ｏ３、Ｍｇ３（ＰＯ４）２、ＡｌＰＯ４和Ｚｒ３（ＰＯ４）４上是高分散的，没有生成明显的Ｖ２Ｏ５晶相；催化剂的可还原性与相应载体氧化物或磷酸盐的金属还原电位序有较好的对应关系，同时与其丙烷氧化脱氢活性也存在较好的平行关系，表明钒氧化物与载体的阳离子形成Ｖ－Ｏ－Ｍ桥键，该桥键氧较易移去，可能是丙烷氧化脱氢的活性氧物种；催化剂表面酸性位有利于丙烷Ｃ－Ｈ键的活化，但导致深度氧化产物增多。
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| 关 键 词： | 钒氧化物 丙烷 氧化脱氢 氧化还原性质 酸碱性 |
Effects of acid base and redox properties on catalytic performance of supported V base catalysts for oxidative dehydrogenation of propane |
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| Chen Mingshu, Weng Weizheng Xu Pianpian, Wan Huilin.Effects of acid base and redox properties on catalytic performance of supported V base catalysts for oxidative dehydrogenation of propane[J].Natural Gas Chemical Industry,1998(5). |
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| Authors: | Chen Mingshu Weng Weizheng Xu Pianpian Wan Huilin |
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| Abstract: | The vanadia base catalysts supported on MgO, Al 2O 3, Mg 3(PO 4) 2,AlPO 4, and Zr 3(PO 4) 4 are characterized by X Ray diffraction pattern and Raman spectroscopy.The results show that vanadia are highly dispersed on the supports.The reducibilities of the catalysts are parallel to their activities for propane oxidative dehydrogenation, suggesting that the bridge lattice oxygen (V O M) may be the active oxygen species in the oxidative dehydrogenation of propane.The surface acid sites are favourable for activation of 2° C H bond in propane molecular, but will lower the selectivity to propene at the same time. |
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| Keywords: | vanadia propane oxidative dehydrogenation redox property acid base property |
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