Recovery of spent alumina-supported platinum catalyst and reduction of platinum oxide via plasma sintering technique

Kuo Chen Chiang, Kun Lung Chen, Chun Yen Chen, Jiann Jyh Huang, Yun Hwei Shen, Mou Yung Yeh, Fung Fuh Wong

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14 Citations (Scopus)

Abstract

A thermal plasma process for the recovery of the spent alumina-supported platinum catalyst (Pt/Al2O3) and reduction of platinum oxide (PtO2) was developed. The spent Pt/Al2O3 and PtO2 catalysts were sintered at >1500K under plasma condition and were reformed or reduced to metallic platinum, which were proven by XRD and EDX. Results from SEM and BET specific surface area analyses indicated that the organic tar with the intermolecular and intramolecular water on the surface of the spent catalysts was decomposed and converted to syngas (CO, CO2, and H2), which might be the reducing agents in the process. Time-programmed hydrogenation study of urocanic acid was carried out to compare the catalytic efficacy of recovery and fresh Pt/Al2O3 catalysts. The experimental result indicated that the plasma sintered Pt/Al2O3 catalyst showed the similar catalytic efficacy with respect to the fresh catalyst.

Original languageEnglish
Pages (from-to)158-165
Number of pages8
JournalJournal of the Taiwan Institute of Chemical Engineers
Volume42
Issue number1
DOIs
Publication statusPublished - 2011 Jan

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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