| Ni对Pt/SAPO-11催化剂物化及异构性能影响 |
| Physicochemical and Isomerization Property of Ni-Pt/SAPO-11 Catalysts Promoted by Ni |
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| 摘要: 通过浸渍法制备了Pt/SAPO-11催化剂，分步浸渍法制备了Ni-Pt/SAPO-11双金属催化剂。通过X射线衍射、低温氮物理吸附、氨程序升温脱附和吡啶吸附红外等手段对所得样品进行了表征。结果表明，助剂Ni的引入导致了催化剂的比表面积和孔容降低，同时，催化剂的B酸量、L酸量及总酸量均有所下降。在340 ℃时对正庚烷的临氢异构化反应中，当Pt含量0.2wt%时，Pt/SAPO-11催化剂的正庚烷转化率为45%，C7异构体收率为43%；而当Pt含量0.2wt%，同时Ni含量为0.2wt%时，Ni-Pt/SAPO-11催化剂的正庚烷转化率提高至72%，C7异构体收率提高至60%。 |
| 关键词: Pt/SAPO-11催化剂 Ni 正庚烷 临氢异构化反应 |
| 基金项目: |
| Abstract: Monometallic catalyst Pt/SAPO-11 was prepared by impregnation method. Bimetallic catalyst Ni-Pt/SAPO-11 was prepared by sequential impregnation method. The catalyst was characterized by XRD, nitrogen adsorption, temperature-programmed desorption of ammonia(NH3-TPD) and FTIR techniques. The results show that the BET surface area, porous volume, the number of Br?nsted acid and Lewis acid, and the total acidity of catalysts decrease slightly with the addition of metal additive Ni. In addition, the catalytic performances of catalysts for the hydroisomerization of n-heptane at 340 ℃ were studied. The results show that the conversion of n-heptane over Pt/SAPO-11 catalyst containing 0.2wt% Pt is 45%, and yield of i-C7 is 43%. However, Ni-Pt/SAPO-11 catalyst containing 0.2 wt% Ni and 0.2 wt% Pt increases its conversion of n-heptane to 72%, and yield of i-C7 to 60%. |
| Keywords: Pt/SAPO-11 catalyst Ni n-heptane hydroisomerization |
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| 刘维桥,刘 平,蒋海燕,尚通明,任 杰,孙予罕.Ni对Pt/SAPO-11催化剂物化及异构性能影响[J].无机化学学报,2010,26(7):1218-1224. |
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