Effect of Sodium Addition to PtSn/AlSBA-15 on the Catalytic Properties in Propane Dehydrogenation

Abstract

The effect of Na addition to PtSn/AlSBA-15 on the catalytic properties in propane dehydrogenation was studied. The catalysts were characterized by XRF, BET, HR-TEM, NH 3 -TPD, TPO and TPR. Results showed that the presence of sodium could not only modify the acid function of the catalysts but also the structure of metallic phase, thus reduce the amount of coke deposition. Among the catalysts investigated, PtSnNa (1.0%)/AlSBA-15 had the best catalytic performance in terms of propane conversion and stability. The high catalytic performance may be owing to the strong interaction between metal and support.

Tuning catalytic selectivity of propane oxidative dehydrogenation via surface polymeric phosphate modification on nickel oxide nanoparticles

“…These results demonstrate that a small amount of Na + could prevent the coke formation on the catalyst. Similar results have been previously reported in Pt catalyzed propane dehydrogenation [26,27].…”

Improved catalytic stability of PtSnIn/xCa–Al catalysts for propane dehydrogenation to propylene

“…Many studies were devoted to improving the catalytic performance of Pt-Sn catalysts in propane dehydrogenation reaction by doping additional promoters including rare earth metals (La, Ce, Y), alkali metals (Li, K, Na), alkaline earth metals (Mg, Ca,) and so on [22][23][24][25][26][27][28][29][30]. Among these promoters, Ca additive exhibited a decent ability to improve the stability and dispersion of metal particles, and thus promoted the catalytic performance.…”

Optimizing zeolite stabilized Pt-Zn catalysts for propane dehydrogenation

“…S5, H2O (5%) and CO 2 (10%) cannot prolong the catalyst lifetime while they even show great inhibition effect on PDH reaction. In contrast, although H 2 shows some negative impact on PDH reaction from the view of reaction equilibrium, it really promotes the catalyst stability to some extent probably by suppressing the deep dehydrogenation and the coke formation thereof [14,[44][45][46][47][48].…”