\r王希涛¹，杨功兵¹，王 康²，朱士贞²

AuthorsHTML:\r王希涛¹，杨功兵¹，王 康²，朱士贞²

AuthorsListE:\rWang Xitao ¹，Yang Gongbing ¹，Wang Kang ²，Zhu Shizhen ²

AuthorsHTMLE:\rWang Xitao ¹，Yang Gongbing ¹，Wang Kang ²，Zhu Shizhen ²

Unit:\r1. 天津大学化工学院，天津 300350；
2. 天津大学海水淡化重点实验室，天津 300350

Unit_EngLish:\r1. School of Chemical Engineering and Technology，Tianjin University，Tianjin 300350，China；
2．Tianjin Key Lab of Membrane Science and Desalination Technology，Tianjin University，Tianjin 300350，China\r
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Abstract_Chinese:\r采用海藻酸铵辅助法制备了Sn 杂化Al2O3球形颗粒，并通过浸渍法获得Pt/Snx-Al2O3-X 催化剂．采用氮吸附-脱附、XRD、NH3-TPD、XPS 与TEM，研究了Sn 杂化量与煅烧温度对催化剂孔结构、晶相、表面酸性、Sn 价态、催化剂表面Pt 颗粒大小的影响，并评估了催化剂在丙烷脱氢过程中的反应活性．实验结果表明，Sn 的引入没有改变γ-Al2O3 的晶相，但是可以提高催化剂的热稳定性；随着煅烧温度的提高，催化剂孔容、孔径明显增加，而比表面积与表面总酸量明显减少；Pt/Sn15-Al2O3-800 催化剂表面Pt、Sn 与γ-Al2O3 之间相互作用较强，Sn0 含量较低，同时Pt粒子平均粒径最小，其丙烷脱氢活性也最好，收率可达35%,以上．\r
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Abstract_English:\rSn-doped spherical alumina were prepared by ammonium alginate assisted sol-gel method and Pt/Snx-Al2O3-X was obtained by impregnation method．The samples were characterized by N2 adsorption-desorption，XRD，NH3-TPD，XPS and TEM．The effects of the amount of Sn-doped and calcination temperature on the pore structure，crystal phase，surface acidity，Sn valence and Pt particle size on the catalyst surface were investigated. The property of the catalysts in the dehydrogenation of propane was evaluated．The results indicate that the introduction of Sn has no effect on the crystal phase of γ-Al2O3，but significantly increases the thermal stability of the catalyst. With the increase of the calcination temperature，the pore volume and the average pore size of the catalyst increase while the specific surface area and the total surface acid amount decrease obviously. The interaction among Pt，Sn and γ-Al2O3 is stronger on Pt/Sn15-Al2O3-800 catalyst surface，and the content of Sn0 is lower．At the same time，the mean particle diameter of Pt particles is the smallest，and the propane dehydrogenation activity is the best which can reach more than 35%,.\r
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Keyword_Chinese:Sn杂化Al2O3；丙烷脱氢；Sn杂化量；煅烧温度\r

Keywords_English:Sn-doped spherical alumina；propane dehydrogenation；amount of Sn-doped；calcination temperature\r


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