| Direct partial oxidation of methane to methanol： Reaction zones and role of catalyst location |
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| 作者单位： | Qijian Zhang（College of Material and Chemical Engineering,Uaoning University of Technology,Jinzhou 121001,Uaoning,China） ;Dehua He（College of Material and Chemical Engineering,Uaoning University of Technology,Jinzhou 121001,Uaoning,China） ;Qiming Zhu（Department of Chemistry,Tsinghua University,Beijing 100084,China） ; |
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| 摘 要： | Direct partial oxidation of methane to methanol was investigated in a specially designed reactor. Methanol yield of about 7%-8% was obtained in gas phase partial oxidation. It was proposed that the reactor could be divided into three reaction zones, namely pre-reaction zone, fierce reaction zone, and post-reaction zone, when the temperature was high enough to initiate a reaction. The oxidation of methane proceeded and was completed mostly in the fierce reaction zone. When the reactant mixture entered the post-reaction zone, only a small amount of produced methanol would bring about secondary reactions, because molecular oxygen had been exhausted in the fierce reaction zone. A catalyst, if necessary, should be placed either in the pre-reaction zone, to initiate a partial oxidation reaction at a lower temperature, or in the fierce reaction zone to control the homogeneous free radical reaction.
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| 关 键 词： | 甲烷 甲醇 氧化作用 反作用地带 催化剂 |
| 收稿时间： | 2007-06-04 |
| 修稿时间： | 1 August 2007. |
Direct partial oxidation of methane to methanol: Reaction zones and role of catalyst location |
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| Qijian Zhang,Dehua He,Qiming Zhu. Direct partial oxidation of methane to methanol: Reaction zones and role of catalyst location[J]. Journal of Natural Gas Chemistry, 2008, 17(1): 24-28. DOI: 10.1016/S1003-9953(08)60021-3 |
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| Authors: | Qijian Zhang Dehua He Qiming Zhu |
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| Affiliation: | [1]College of Material and Chemical Engineering, Liaoning University of Technology, Jinzhou 121001, Liaoning, China [2]Department of Chemistry, Tsinghua University, Beijing 100084, China |
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| Abstract: | Direct partial oxidation of methane to methanol was investigated in a specially designed reactor. Methanol yield of about 7%-8% was obtained in gas phase partial oxidation. It was proposed that the reactor could be divided into three reaction zones, namely pre-reaction zone, fierce reaction zone, and post-reaction zone, when the temperature was high enough to initiate a reaction. The oxidation of methane proceeded and was completed mostly in the fierce reaction zone. When the reactant mixture entered the post-reaction zone, only a small amount of produced methanol would bring about secondary reactions, because molecular oxygen had been exhausted in the fierce reaction zone. A catalyst, if necessary, should be placed either in the pre-reaction zone, to initiate a partial oxidation reaction at a lower temperature, or in the fierce reaction zone to control the homogeneous free radical reaction. |
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| Keywords: | methane methanol partial oxidation reaction zone role of catalyst |
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