FeCoK催化剂上二氧化碳加氢合成低碳烯烃的研究  

The Systhesis of Light Olefins from CO_2 Hydrogenation on FeCoK Catalysts

作　　者：李梦青[1] 邓国才[2] 陈荣悌[2] 

机构地区：[1]天津大学化学工程研究所,天津300072 [2]南开大学化学系,天津300071

出　　处：《河北工业大学学报》2000年第2期39-43,共5页Journal of Hebei University of Technology

摘　　要：研究了多种催化剂上二氧化碳加氢的反应性能，低碳烯烃的收率依次增加的次序为： ＦｅＣｏＫ> ＦｅＣｏＭｎＫ> ＦｅＣｏ＞Ｆｅ＞ＦｅＫ．由 Ｍ（ＯＨ）３分解制备的 ＦｅＣｏＫ催化剂性能优于碳酸 盐Ｍ（ＣＯ３）和Ｍ（ＯＨ）２分解制备的催化剂；ｍ（Ｆｅ）：ｍ（Ｃｏ）：ｍ（Ｋ）＝１００：１００：５时烯烃收率 最高．ＦｅＣｏＫ催化剂中添加ＭｎＯ，对烯烃的生成不利．通过不同反应条件下的实验，较 佳的反应条件为： ６２３ Ｋ， １５００ｈ－１， ＣＯ２／Ｈ２＝ ３／１． Ｍoｓｓｂａｕｅｒ效应能谱实验结果表明 ＦｅＣｏＫ 催化剂经氢气还原，铁可完全还原为零价，形成铁钻合金，反应后转化为炭化铁，为反应 的活性相．FeCoK multicomponent catalysts were prepared by various coprecipitation methods and were used in the synthesis of light olefins by CO2 hydrogenation. The results show that the light olefins yield increase in the order of FeCoK > FeCoMnK > FeCo >Fe >FeK. The FeCoK catalyst from M(OH)3 decomposition is more effective for the light olefins yield than from M(OH)2 and M(CO3), the appropriate metallic composite of catalyst is Fe: Co; K=100: 100: 5. MnO addition to FeCoK catalysts is unfavorable for light olefins yield. It was found that the light olefins yield is higher at the condition of 623 K, 1500h-', CO2/H2= 3/l. The results of M5ssbauer studies illustrate that after reduction of FeCoK catalyst, FeCo alloy forms and transfers to iron carbides acting as activating phase,

关 键 词：FeCoK催化剂 二氧化碳 低碳烯烃 合成 

分 类 号：O623.12[理学—有机化学]