OALib Journal期刊
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烃类晶格氧选择氧化
Keywords: 烃类,晶格氧,选择氧化,还原-氧化机理,循环流化床
Abstract:
用催化剂的晶格氧作为烃类选择氧化的氧化剂,按还原-氧化(Redox)模式,采用循环流化床提升管反应器,将烃原料和空气分开进料,在提升管反应器中烃分子与催化剂的晶格氧反应生成氧化产物,失去晶格氧的催化剂被输送到再生器中用空气氧化到初始高价态,然后送入提升管反应器完成还原-再氧化循环。这种新工艺是在没有气相氧分子的条件下进行反应,可避免气相和减少表面的深度氧化反应,大幅度提高烃类选择氧化的选择性,而且因不受爆炸极限的限制可提高原料浓度,使反应产物容易分离回收,是控制深度氧化、节约资源和保护环境的有效催化新技术。本文试图对晶格氧选择氧化的研究现状,面临的主要挑战和应用前景进行简要评述。
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