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柠檬酸对负载型磷化镍催化剂加氢脱硫性能的影响

宋华 ,  张永江 ,  宋华林 ,  代敏

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引用本文: 宋华, 张永江, 宋华林, 代敏. 柠檬酸对负载型磷化镍催化剂加氢脱硫性能的影响[J]. 燃料化学学报, 2012, 40(10): 1246-1251. shu
Citation:  SONG Hua, ZHANG Yong-jiang, SONG Hua-lin, DAI Min. Effect of citric acid on hydrodesulfurization performance of the supported nickel phosphide catalyst[J]. Journal of Fuel Chemistry and Technology, 2012, 40(10): 1246-1251. shu

柠檬酸对负载型磷化镍催化剂加氢脱硫性能的影响

    通讯作者: 宋华,E-mail:songhua2004@sina.com;Tel:+86-459-6503167。
  • 基金项目:

    国家自然科学基金(21276048)。 (21276048)

摘要: 采用溶胶-凝胶法制备了TiO2-Al2O3复合载体,以柠檬酸(CA)为络合剂采用浸渍法制备了Ni2P负载的TiO2-Al2O3复合载体催化剂,并用 X 射线衍射(XRD)、N2吸附比表面积(BET)测定、热重-差热分析(TG-DTA)、程序升温氢还原(H2-TPR)和透射电子显微镜(TEM)技术对催化剂的结构和性质进行了表征,考察了加入CA对Ni2P/TiO2-Al2O3催化剂二苯并噻吩(DBT)加氢脱硫(HDS)性能的影响。结果表明,适量的CA可以丰富催化剂的孔道,提高催化剂的比表面积,使催化剂具有更好的孔结构、更高的金属活性组分分散度和更均一的活性组分尺寸。CA的引入可以减弱金属与载体之间的相互作用,显著降低Ni和P前驱体的还原温度,促进Ni-P-O活性相前驱态的生成。在360℃、3.0 MPa、氢油比500(体积比)、液时体积空速2.0 h-1的条件下,反应4 h时二苯并噻吩转化率达到99.5%。在48 h内二苯并噻吩转化率可稳定在95.0%左右。

English

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  • 收稿日期:  2012-02-08
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