Partial Oxidation of Isooctane over Ru‐Promoted Nickel–Molybdenum/Cerium–Zirconium Oxide Catalyst at an Intermediate Temperature for Internal Reforming Solid Oxide Fuel Cell Applications. Issue 8 (29th June 2021)

• Record Type: Journal Article
• Authors: Bkour, Qusay; Zhao, Kai; Kim, Yoonkap; Leonel, Gerson; Ly, Anh; Saunders, Steven R.; Norton, M. Grant; Ha, Su
• Is Part Of: Energy technology. Volume 9:Issue 8(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-06-29
• Subjects: crystallite sizes -- hydrogen spillover -- nickel–molybdenum–ruthenium -- partial oxidation -- tubular solid oxide fuel cells; Energy development -- Periodicals; Power resources -- Periodicals; 333.79
• DOI: 10.1002/ente.202100064
• Languages: English
• ISSNs: 2194-4288

Abstract

Abstract : In previous work, nickel–molybdenum (NiMo) nanoparticles supported on cerium–zirconium oxide (CZ) catalyst showed excellent catalytic activity and stability for liquid fuel reforming with an improved coking resistance compared with Ni/CZ. Lowering the temperature of solid oxide fuel cells (SOFCs) below 700 °C is vital, because they can reduce the material costs and thermal stresses of SOFCs. However, the performance of NiMo/CZ is insufficient when operated at temperatures below 750 °C. This work aims to improve the activity and coking resistance of NiMo/CZ at a temperature of 700 °C by adding a minimal amount (0.1 wt%) of Ru. The Ru‐promoted sample shows a high reforming activity for partial oxidation of isooctane at 700 °C. The X‐ray diffraction (XRD) and STEM indicate a smaller Ni crystallite size for NiMoRu/CZ catalyst, which would decrease its tendency to facilitate coke formation. The tubular SOFC with the NiMoRu/CZ as its internal reforming catalyst displays good power density output and performance stability at 200 mA cm −2 . Abstract : The single tubular solid oxide fuel cell with the nickel–molybdenum (NiMo)/cerium–zirconium oxide (CZ) internal reforming catalyst quickly degrades when it operates with isooctane. After introducing the Ru into the NiMo/CZ catalyst, the cell shows much‐improved stability. The results demonstrate the effectiveness of the Ru for enhancing the performance stability of the internal reforming of isooctane within the tubular cell.