| 马宇春,刘仲能.改性丝光沸石催化二甲醚气相羰化的反应性能[J].分子催化,2014,(5):460-465 |
| 改性丝光沸石催化二甲醚气相羰化的反应性能 |
| Catalytic Behavior of Dimethyl Ether Vapor-Phase Carbonylation over Modified Mordenite Zeolites |
| 投稿时间：2014-08-27 修订日期：2014-09-25 |
| DOI： |
| 中文关键词: 丝光沸石 二甲醚 气相羰化 积炭 |
| 英文关键词:Mordenite Dimethyl ether Vapor-Phase Carbonylation Carbon Deposition |
| 基金项目: |
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| 摘要点击次数: 1615 |
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| 中文摘要: |
| 对比研究了铜/钾改性丝光沸石、铜改性丝光沸石、H型丝光沸石上二甲醚气相羰化制醋酸甲酯的反应行为，并通过XRD、NH3-TPD、SEM、TEM及FT-IR等对反应前后催化剂进行了表征分析。丝光沸石负载Cu后，改变了反应过程中催化剂上积炭中间物种的形态，由石墨状“硬碳”转变为易于消除的“软碳”（结焦），从而提高了羰化反应的活性和稳定性；K改性的Cu/MOR沸石，由于K对沸石表面强酸位的调变，抑制了二次反应的发生，进一步提高了二甲醚气相羰化反应的稳定性。 |
| 英文摘要: |
| A series of potassium/copper modified mordenite (MOR) zeolite catalysts were prepared and used for methyl acetate synthesis from dimethyl ether (DME) vapor-phase carbonylation. Catalysts were characterized by XRD, NH3-TPD, SEM, TEM and FT-IR. The results indicated that Cu additive changed carbon deposition intermediate species, which transformed from graphite like “hard carbon” to “soft coke”. Side reactions were suppressed partly on K1.0Cu/MOR catalyst, and then gave rise to an optimum catalytic behavior. |
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