前言乙苯脱氢是当前世界上获取苯乙烯的主要途径,所采用的催化剂多数是非负载型铁系催化剂。各种铁系催化剂虽然组份不等,但共同特点是都含有铁、钾和铬的化合物。一般认为,大量氧化铁是主要活性组份,钾化合物是重要的助催化剂,铬化合物是结构助剂。据报道,铬化合物是有毒的致癌物质,能引起多种疾病。 Preface Ethylbenzene dehydrogenation is the main way to get styrene in the world at present. Most of the catalysts used are unsupported iron-based catalysts. Although various iron-based catalysts range in composition, the common feature is the compounds containing iron, potassium and chromium. It is generally believed that a large amount of iron oxide is the main active component, potassium compounds are important cocatalysts, and chromium compounds are structural aids. It has been reported that chromium compounds are toxic carcinogens and cause a variety of diseases.