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- W760780510 abstract "通过X射线衍射（XRD）、N2吸附、透射电镜（TEM）、NH3程序升温脱附（NH3-TPD）、H2程序升温还原（H2-TPR）和O2程序升温氧化（O2-TPO）等多种表征手段及催化反应性能评价,研究了镁助剂的添加对PtNa/Sn-ZSM-5催化丙烷脱氢反应性能的影响.结果表明：适量Mg的添加（0.3%和0.5%,质量分数）能促进催化剂表面金属粒子的分散,减少反应过程中积碳的产生.Mg的引入能有效抑制催化剂中Sn组分的还原,使更多量的Sn组分以氧化态形式存在,有利于丙烷脱氢反应的进行.但是,过量Mg的加入导致催化剂表面金属颗粒易于发生团聚,高温下Sn组分易于被还原,不利于反应的进行.在本实验中,0.5%Mg加入后PtNa/Sn-ZSM-5催化剂显示出最佳的反应性能,反应7h后,丙烷转化率仍然高达38.7%,对应的丙烯选择性能够维持在95%以上." @default.
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- W760780510 date "2012-01-01" @default.
- W760780510 modified "2023-10-18" @default.
- W760780510 title "Effects of Mg Addition on Catalytic Performance of PtNa/Sn-ZSM-5 in Propane Dehydrogenation" @default.
- W760780510 doi "https://doi.org/10.3866/pku.whxb201202073" @default.
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