Ethane and propane dehydrogenation over PtIr/Mg(Al)O

Jason Wu, Shaama Mallikarjun Sharada, Chris Ho, Andreas Hauser, Martin Head-Gordon, Alexis T. Bell*

*Korrespondierende/r Autor/-in für diese Arbeit

Publikation: Beitrag in einer FachzeitschriftArtikelBegutachtung

Abstract

Increased demand for light alkenes has motivated research on the catalytic dehydrogenation of the light alkanes and on understanding the role of catalyst composition on the activity, selectivity, and stability of Pt-based catalysts used for this purpose. The present study examines the structure and performance of Pt–Ir catalysts for ethane and propane dehydrogenation, and compares them with the performance of Pt and Pt–Sn catalysts. Nanoparticles of Pt, PtSn, and PtIr were prepared in a colloidal suspension and then dispersed onto calcined hydrotalcite (Mg(Al)O). After characterization to confirm formation of a bimetallic alloy, it was observed that at high conversions, Pt3Ir/Mg(Al)O exhibited lower initial activity than Pt3Sn/Mg(Al)O but greater stability to coke deposition. Intrinsic rate measurements at low feed residence time revealed the following trend in activity: Pt3Sn > Pt3Ir > Pt. DFT calculations carried out on tetrahedral clusters (Pt4, Pt3Ir, Pt3Sn) reveals that this trend in activity can be replicated and Ir is capable of alkane activation, a trait unique to this bimetallic system.
Originalspracheenglisch
Seiten (von - bis)25-32
Seitenumfang8
FachzeitschriftApplied Catalysis / A
Jahrgang506
DOIs
PublikationsstatusVeröffentlicht - 5 Okt 2015

ASJC Scopus subject areas

  • Katalyse
  • Prozesschemie und -technologie

Fields of Expertise

  • Advanced Materials Science

Fingerprint

Untersuchen Sie die Forschungsthemen von „Ethane and propane dehydrogenation over PtIr/Mg(Al)O“. Zusammen bilden sie einen einzigartigen Fingerprint.

Dieses zitieren