| 邵怀启,钟顺和.CO2氧化丙烷脱氢MoO3-V2O5/SiO2催化剂研究[J].分子催化,2004,(2):87-92 |
| CO2氧化丙烷脱氢MoO3-V2O5/SiO2催化剂研究 |
| MoO3-V2O5/SiO2 Catalyst for Oxidative Dehydrogenation of Propane with CO2 |
| 修订日期：2003-08-21 |
| DOI： |
| 中文关键词: 丙烷 氧化脱氢 二氧化碳 五氧化二钒 三氧化钼 |
| 英文关键词:Propane,Oxydehydrogenation,Carbon dioxide,Vanadium pentoxide,Molybdenum trioxide |
| 基金项目:国家重大基础研究前期研究专项(2001CCA03600)资助项目. |
| 邵怀启 钟顺和 |
邵怀启(天津大学,化工学院,天津,300072)
;钟顺和(天津大学,化工学院,天津,300072)
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| 摘要点击次数: 1954 |
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| 中文摘要: |
| 采用表面改性和等体积浸渍法制备了MoO3-V2O5／SiO2复合氧化物，采用TPR、IR、TPD和微反技术表征了催化剂对CO2和C3H8的吸附性能和CO2部分氧化丙烷脱氢的反应性能．结果表明：随MoO3加入量的增加，V=O还原温度降低，晶格氧更易活化．CO2和丙烷的活化温度降低，丙烷转化率增高，丙烯选择性下降．V=O中晶格氧的活化是CO2氧化丙烷制丙烯反应的关键． |
| 英文摘要: |
| MoO_3-V_2O_5/SiO_2 surface compound oxides were prepared by the methods of surface reaction modification and isovolumn impregnation. Chemisorption properties and partial oxidation behavior of C_3H_8 with CO_2 on the MoO_3-V_2O_5/SiO_2 catalyst were characterized by TPR, IR, TPD and micro-reactor techniques. The results show that the reduction temperature of V=O species is decreased and more activity lattice oxygen is easier to be activated due to the addition of MoO_3.Unidentate, bidentate and bridged carbonate are formed when carbon dioxide is chemisorbed on the catalyst surface, CO and lattice oxygen are formed during desorption of the bidentate and bridged carbonates. Propylene and water are formed during desorption of propane chemisorbed on the lattice oxygen in the V=O species through H of methyl and methylene binary site. Conversion of propane is increased and selectivity of propylene is decreased with the addition of MoO_3.Activation of lattice oxygen in the V=O species is of importance in the reaction of CO_2 oxydehydrogenation of propane to propylene. |
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