合成气直接制取低碳烯烃的单管扩大试验Ⅲ.催化剂再生性能研究 |
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摘 要: | 对K-Fe-MnO/Silicalite-2催化剂积炭及烧炭的差热与热重分析结果表明,在CO加氢反应过程中催化剂表面可形成两种类型的积炭,其中Ⅰ型炭有利于提高CO加氢制低碳烯烃的选择性,而Ⅱ型炭则不能。研究结果还表明,K-Fe-MnO/Silicalite-2催化剂经再生后可恢复其新鲜态催化剂性能。在单管扩大试验中,反应器入口高温区催化剂表面容易形成Ⅰ型和Ⅱ型积炭,而恒温区催化剂表面只有Ⅰ型积炭,由此可导致催化剂反应床层最高温度区发生位移
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关 键 词: | 合成气 低碳烯烃 CO加氢 差热与热重分析 |
Single tube scaleup tests on direct conversion of syngas to light olefins Ⅲ. studies of regenerated catalyst properties |
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Abstract: | he differential thermal and thermo gravimetric analyses of K Fe MnO/silicalite 2 catalyst carbon deposit and carbon burning show that two types of carbon deposit may be formed on the catalyst surface during CO hydrogenation reaction, in which type I carbon deposit is advantagous to increase light olefins selectivity in CO hydrogenation, but type Ⅱ carbon deposit is not. The analytic results also show that K Fe MnO/silicalite 2 catalyst can be restored to its fresh state catalytic properties after regeneration. In the single tube scaleup tests, type Ⅰ and Ⅱ carbon deposits can easily be formed on the catalyst surface at the high temperature zone of the reactor inlet, and only type I carbon deposit is formed on the catalyst surface at the constant temperature zone, which will cause the displacement of the highest temperature zone in catalyst bed. |
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Keywords: | syngas light olefins CO hydrogenation differential thermal and thermo gravimetric analyses |
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