Pt–Sn-based catalyst's intensification using Al2O3–SAPO-34 as a support for propane dehydrogenation to propylene

Dehydrogenation of C3–C4 paraffin's to corresponding olefins over slit-SAPO-34 supported Pt-Sn-based novel catalyst

“…1.4-2.5 nm [37,38]. Furthermore, no PtO 2 species were found in XRD as Pt is well dispersed/interacted on the slit-SAPO-34 [38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54]. Interestingly, the intensities of the corresponding peaks of slit-SAPO-34 supported catalyst with SAPO-34 supported catalyst, in particular at angle 2u = 8-108 decreased a lot that indicates decline in crystallinity, while no peak shift was observed.…”

“…This confirms the acid sites presence after metallic incorporation, which is necessary for selective conversion of intermediates to desired product. The reduction properties of the novel catalyst Pt-Sn/slit-SAPO-34 were found similar to Pt-Sn/ SAPO-34 reduction peak [39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54]. Oxidation state of promoter is important in elaborating surface density, while its higher concentration leads to alloy formation and results permanent deactivation [41][42][43][44][45][46][47][48].…”

Rational Asymmetric Catalyst Design, Intensification and Modeling

“…In our extensive studies of catalyst intensification we conduct series of kinetic analysis for TPx experiments in phenomenological way [15][16][17]. Modelling of TPD data is based on adsorption and desorption theories, while TPR and TPO call for gas-solid surface reaction mechanisms, which may include topochemical characteristics.…”

“…Pt-Sn-based catalysts supported on amorphous supports or zeolites, for propane dehydrogenation have been discussed in many studies [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]. The selection of Sn as a promoter has been explained in terms of geometric and/or electronic effects [30].…”

“…Therefore, there is a growing interest in developing zeolite supported catalysts, e.g. Pt-Sn/ZSM-5 zeolite for propane dehydrogenation, because of longer activation times and higher conversions [15][16][17]. Many studies have improved the performance of Pt-Sn/ZSM-5 catalysts by adding a more metallic promoter (particularly from alkali or alkaline earth metals) like Na, Fe, Zn, etc.…”