氟对PtSnNaLa/ZSM-5催化剂丙烷脱氢反应性能的影响

应用化学, 2015, 32(2): 207-213. doi: 10.11944/j.issn.1000-0518.2015.02.140168

氟对PtSnNaLa/ZSM-5催化剂丙烷脱氢反应性能的影响

黄镜怡 ^1, , 周钰明 ^2, , 唐梦涵 ^3, , 张一卫 ^4, , 周诗健 ^5, , 盛晓莉 ^6,

1.东南大学化学化工学院南京211189

2.东南大学化学化工学院南京211189

3.东南大学化学化工学院南京211189

4.东南大学化学化工学院南京211189

5.东南大学化学化工学院南京211189

6.东南大学化学化工学院南京211189

基金项目: National Natural Science Foundation of China(21376051,21306023,21106017) Natural Science Foundation of Jiangsu Province of China(No.BK20131288)国家自然科学基金(21376051,21306023,21106017) 江苏省自然科学基金(BK20131288)

关键词：氟 , 丙烷脱氢 , 丙烯 , 催化剂

Effect of Fluorine on PtSnNaLa/ZSM-5 Catalyzed Dehydrogenation of Propane

Keywords： fluorine , propane dehydrogenation , propene , catalyst

在PtSnNaLa/ZSM-5催化剂中引入氟元素,制得用于丙烷脱氢反应的氟改性催化剂,利用X射线衍射(XRD)、NH3吸脱附(NH3-TPD)、红外(Fr-m)、固体核磁(27Al MAS NMR)和程序升温还原(H2-TPR)等技术手段研究不同氟含量对催化剂的结构、表面酸性和丙烷脱氢反应性能的影响.结果表明,氟能降低催化剂表面的弱酸强度,增强Pt与载体间的相互作用力,降低反应副产物的选择性,从而提高了产物丙烯的选择性,当氟的添加量为0.2％时,丙烯选择性可达到99.2％.同时氟的加入易于载体骨架的脱铝,使得Sn组分的还原变得相对容易,但对催化剂结构没有明显的影响.

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