Dehydrogenation of Propane to Propylene Using Promoter-Free Hierarchical Pt/Silicalite-1 Nanosheets

Propane dehydrogenation (PDH) is the extensive pathway to produce propylene, which is as a very important chemical building block for the chemical industry. Various catalysts have been developed to increase the propylene yield over recent decades; however, an active site of monometallic Pt nanoparti...

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Bibliographic Details
Published in:Catalysts 2019-02, Vol.9 (2), p.174
Main Authors: Wannapakdee, Wannaruedee, Yutthalekha, Thittaya, Dugkhuntod, Pannida, Rodponthukwaji, Kamonlatth, Thivasasith, Anawat, Nokbin, Somkiat, Witoon, Thongthai, Pengpanich, Sitthiphong, Wattanakit, Chularat
Format: Article
Language:English
Subjects:
Adsorption
Alumina
Catalysts
Catalytic cracking
Chemical industry
Chemical reactions
Dehydrogenation
hierarchical zeolite nanosheets
Nanoparticles
Nanosheets
Oligomerization
Platinum
Propane
Propylene
Selectivity
Silicalite
silicalite-1
Structural hierarchy
Zeolites
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Summary:Propane dehydrogenation (PDH) is the extensive pathway to produce propylene, which is as a very important chemical building block for the chemical industry. Various catalysts have been developed to increase the propylene yield over recent decades; however, an active site of monometallic Pt nanoparticles prevents them from achieving this, due to the interferences of side-reactions. In this context, we describe the use of promoter-free hierarchical Pt/silicalite-1 nanosheets in the PDH application. The Pt dispersion on weakly acidic supports can be improved due to an increase in the metal-support interaction of ultra-small metal nanoparticles and silanol defect sites of hierarchical structures. This behavior leads to highly selective propylene production, with more than 95% of propylene selectivity, due to the complete suppression of the side catalytic cracking. Moreover, the oligomerization as a side reaction is prevented in the presence of hierarchical structures due to the shortening of the diffusion path length.
ISSN:2073-4344
2073-4344
DOI:10.3390/catal9020174