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OALib Journal期刊
ISSN: 2333-9721
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fe/sio2纳米复合物上合成气制低碳烯烃催化性能研究
, PP. 827-832
Keywords: 合成气,费托合成,低碳烯烃,四氧化三铁,纳米复合物
Abstract:
？分别采用一步合成法和常规共沉淀法制备了fe/sio2催化剂，通过n2物理吸附、x射线衍射、透射电镜、傅里叶变换红外光谱和程序升温还原等方法对催化剂进行了表征，并在固定床反应器中对其费托合成制低碳烯烃的催化性能进行了评价。结果表明，与共沉淀铁基催化剂不同，采用一步合成法制备的纳米复合物主要由fe3o4相构成，形貌呈规则球形，平均粒径为30nm，尺寸分布窄，更容易还原。一步合成法制得的fe/sio2催化剂对费托合成反应具有较高的活性和低碳烯烃选择性、较低的甲烷选择性和良好的稳定性。
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