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比较研究了经Ｃａ改性的ＰｔＳｎ／ＭｇＡｌ２Ｏ４在氮气及水蒸汽稀释下的丙烷脱氢性能，并利用ＴＰＲ、Ｈ２－ＴＰＤ、ＸＰＳ及脉冲氢吸附对催化剂进行了表征．结果表明，ＰｔＳｎ／ＭｇＡｌ２Ｏ４中加入０．５％的Ｃａ，增加了催化剂的丙烷脱氢活性，抑制了积炭失活．过量Ｃａ的加入则促进了催化剂中Ｓｎ组分的还原，生成了零价锡并可能与Ｐｔ形成合金，从而导致催化剂失活．在水蒸汽中反应时，水蒸汽一方面可调变催化剂结构，增加其脱氢活性；另一方面还可抑制催化剂表面积炭，改善其稳定性．
The dehydrogenation behavior of propane over Ca-modified PtSn / MgAl2O4 under nitrogen and steam was compared. The catalysts were characterized by TPR, H2-TPD, XPS and pulsed hydrogen adsorption. The results showed that adding 0.5% Ca to PtSn / MgAl2O4 increased the propane dehydrogenation activity and inhibited the coke inactivation. The addition of excessive Ca promotes the reduction of the Sn component in the catalyst, generates zero-valent tin and may form an alloy with Pt, resulting in deactivation of the catalyst. In the reaction of water vapor, water vapor on the one hand can change the catalyst structure, increasing its dehydrogenation activity; the other hand, can also inhibit the catalyst surface carbon deposition and improve its stability.