| 铁含量对Fe-Mn-K催化剂上CO2加氢反应性能的影响 |
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| 引用本文： | 任冬梅,周亚松.铁含量对Fe-Mn-K催化剂上CO2加氢反应性能的影响[J].工业催化,2004,12(7):32-35. |
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| 作者姓名： | 任冬梅 周亚松 |
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| 作者单位： | 石油大学（北京）重质油加工国家重点实验室，北京 102249 |
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| 摘 要： | 在370 ℃、2.0 MPa和600 h－1条件下，考察了Fe-Mn-K复合催化剂上的CO2选择性加氢合成低碳烯烃性能。XRD表征表明，复合催化剂中负载的金属组分主要以Fe2O3和MnO2形式存在。通过H2-TPR和CO2-TPD研究了Fe-Mn-K催化剂对H2的还原性能和CO2吸附性能的影响，当催化剂中Fe负载质量分数为12%时，H2-TPD温度较低，CO2转化率大于30%，C=2～C=4低碳烯烃选择性也较高。CO2-TPD结果表明，随Fe含量的增加，初始脱附温度提高，脱附量增加，催化剂对CO2的吸附强度逐渐增大。
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| 关 键 词： | 铁含量 CO2加氢 低碳烯烃选择性 Fe-Mn-K复合催化剂 |
| 文章编号： | 1008-1143(2004)07-0032-04 |
| 修稿时间： | 2004年3月1日 |
Effects of iron content on CO2 hydrogenation over Fe-Mn-K catalyst |
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| REN Dong-mei,ZHOU Ya-song.Effects of iron content on CO2 hydrogenation over Fe-Mn-K catalyst[J].Industrial Catalysis,2004,12(7):32-35. |
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| Authors: | REN Dong-mei ZHOU Ya-song |
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| Affiliation: | State Key Laboratory of Heavy Oil Processing, Petroleum University(Beijing),Beijing 102249,China |
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| Abstract: | Selective hydrogenation of CO2 to light olefins over Fe-Mn-K catalyst was investigated at 370 ℃, 2.0 MPa and 600 h－1. XRD results showed the metal components in Fe-Mn-K catalyst mainly exist in the form of Fe2O3 and MnO2. H2 reduction and CO2 adsorption properties of Fe-Mn-K catalyst were studied by means of H2-TPR and CO2-TPD. The results indicated that there is an optimum Fe content for the catalyst, i. e., mass fraction of 12%, at which satisfactory results were obtained with lower H2-TPR temperature, CO2 conversion of over 30% and higher selectivity to C=2-C=4 light olefins. The CO2-TPD results also showed that initial desorption temperature increases, CO2 desorption amount decreases and CO2 adsorption intensity increases with Fe content in the catalyst, respectively. |
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| Keywords: | iron content Fe-Mn-K catalyst CO_2 hydrogenation selectivity to light olefins |
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