Propane dehydrogenation to propylene over Pt-based catalysts

Abstract

Propane catalytic dehydrogenation to propylene was investigated over novel platinum-based catalysts, and the BET, H 2 -chemisorption, H 2 -TPR, H 2 -TPD, C 3 H 6 -TPD and O 2 -pulse techniques were used for catalyst characterization in this paper. The results showed that the addition of Zn and Ce promoters into Pt-based catalyst could remarkably improve the performances of dehydrogenation. Highly propylene selectivity, about 99%, was obtained in the dehydrogenation reaction. This improvement in catalytic performances could be attributed to the strong surface interactions, which modified the surface properties of the active platinum metal and the support, and further improved the catalytic performance of Pt-based catalyst.

Electronic density enrichment of Pt catalysts by coke in the propane dehydrogenation

“…There have been many studies on catalytic stability in the propane dehydrogenation [8][9][10][11]. However, they focused on decrease in catalytic activity by the coke formation or change in coke mobility due to the interaction of the second metal with Pt.…”

Influence of Oxygen Mobility over Supported Pt Catalysts on Combustion Temperature of Coke Generated in Propane Dehydrogenation

“…Although many efforts have been made to modify Pt-supported catalysts, deactivation due to coking is still not completely overcome, and catalysts must undergo continuous or frequent regeneration processes to restore the catalytic activity [4][5][6][7][8][9][10].…”

Location and structure of coke generated over Pt–Sn/Al2O3 in propane dehydrogenation

“…Hydrogen was added into the propane feedstock to suppress the tendency of over-dehydrogenation [6]. Supported Pt catalysts were modified by adding a second metal (Sn, Pb, Zn, Ga) [7][8][9][10] and/or alkali metal (Li, K, Na) [11]. Some rare earth metals (La, Ce) were also used to promote the supports (Al 2 O 3 , SiO 2 ) by enhancing their thermal stability and electronic effects [12].…”