Recovery and reduction of spent nickel oxide catalyst via plasma sintering technique

Fung Fuh Wong, Chun Min Lin, Chih Ping Chang, Jun Rong Huang, Mou Yung Yeh, Jiann Jyh Huang

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


A thermal plasma process for the recovery and reduction of nickel oxide in the spent nickel-based catalyst (NiO/SiO2) was developed. The spent catalyst was sintered at >1,500 °C under plasma condition and the nickel oxide therein was reduced to nickel, which was proven by XRD and EDX. By application of SEM and GC technique, the organic tar on the surface of the spent catalyst was found to decomposed and converted to syngas (CO, CO2, and H2), which might be the reducing agents in the process. A gasification mechanism for the generation of syngas and the reduction of nickel oxide under plasma conditions was proposed.

Original languageEnglish
Pages (from-to)585-595
Number of pages11
JournalPlasma Chemistry and Plasma Processing
Issue number6
Publication statusPublished - 2006 Dec

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Chemical Engineering
  • Condensed Matter Physics
  • Surfaces, Coatings and Films


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