CoAl2O4/Al2O3载体对钴基费托催化剂反应性能影响的研究

韩健康; 贾丽涛; 侯博; 李德宝; 刘岩; 刘亚纯

CoAl₂O₄/Al₂O₃载体对钴基费托催化剂反应性能影响的研究

1.
中国科学院山西煤炭化学研究所煤转化国家重点实验室, 山西太原 030001;
2.
中国科学院大学, 北京 100049

详细信息

通讯作者:
贾丽涛

中图分类号: TQ032.41
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- 被引次数: 0
出版历程
- 收稿日期: 2015-03-13
- 修回日期: 2015-05-10
- 刊出日期: 2015-07-30

Catalytic properties of CoAl₂O₄/Al₂O₃ supported cobalt catalysts for Fischer-Tropsch synthesis

1.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;
2.
University of Chinese Academy of Sciences, Beijing 100049, China

摘要

摘要: 通过浸渍和高温焙烧,制得表面附着CoAl₂O₄微晶颗粒的改性Al₂O₃载体,并采用等体积浸渍法制备负载型Co基催化剂。结合 N₂物理吸附、XRD、H₂-TPR、XPS及H₂化学吸附等表征手段,研究改性载体及其负载钴基催化剂的织构特征;采用费托合成反应评价其催化性能。结果表明,Al₂O₃改性后,表面CoAl₂O₄的存在有效减少了载体与活性组分Co的相互作用,显著提高了催化剂的还原度和催化活性。载体的改性量在20%左右达到最佳值,继续增加,催化剂还原度和活性基本不再升高。载体改性促使催化剂CH₄选择性有所降低,C₅₊选择性略有提高。
- 费托合成 /
- 钴基催化剂 /
- 氧化铝改性 /
- 铝酸钴
Abstract: The γ-Al₂O₃ modified with CoAl₂O₄ by the impregnation method was used as support to prepare cobalt catalysts. The physicochemical properties of the prepared catalysts were characterized with BET, XRD, H₂-TPR and XPS techniques and H₂-chemisorption experiment. The catalytic properties of the prepared catalysts were investigated for Fischer-Tropsch synthesis. It was shown that CoAl₂O₄ existed on the surface of γ-Al₂O₃, and thus, effectively weakening the interaction of Co and Al₂O₃ and resulting in a great increase in the reduction degree and the catalytic activity. The sample with a CoAl₂O₄ content of 20% shows the highest catalytic activity. It is worth noting that the CoAl₂O₄ modification decreased the CH₄ selectivity but enhanced the C₅₊ selectivity and catalytic stability.
- Fischer-Tropsch synthesis /
- cobalt-based catalyst /
- modified Al₂O₃ /
- CoAl₂O₄

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参考文献(15)

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