Studying the stability of Ni supported on modified with CeO2 alumina catalysts for the biogas dry reforming reaction

N. D. Charisiou, A. Iordanidis, K. Polychronopoulou, I. V. Yentekakis, M. A. Goula

Research output: Contribution to journalConference articlepeer-review

20 Scopus citations

Abstract

In the present study, the stability of Ni supported on γ-Al2O3 modified with CeO2 (10 and 20 wt%) catalysts during the biogas dry reforming reaction for syngas production was investigated. Specifically, time-on-stream experiments were conducted at different reaction temperatures and Weight-based Hourly Space Velocities (WHSVs); CH4 and CO2 conversions, and H2 and CO yields were systematically recorded over time-on-stream for all catalysts. Calcined and reduced catalytic samples were characterized using N2 adsorption/desorption, inductively coupled plasma spectrometry (ICP), X-ray diffraction (XRD), temperature programmed reduction and desorption (H2-TPR, NH3-and CO2-TPD). The addition of ceria provided catalysts with improved activity, hydrogen selectivity and stability for the whole temperature range investigated. Thermal analysis (TGA-DTG) and transmission electron microscopy (TEM) results indicated that the deposited carbon on the catalytic surface was less graphitic for the Ni/CeO2-Al2O3 ones.

Original languageBritish English
Pages (from-to)27607-27616
Number of pages10
JournalMaterials Today: Proceedings
Volume5
Issue number4
DOIs
StatePublished - 2018
Event11th Panhellenic Scientific Conference on Chemical Engineering, PSCCE 2017 - Thessaloniki, Greece
Duration: 25 May 201727 May 2017

Keywords

  • Biogas dry reforming
  • Carbon deposition
  • Ceria modified alumina
  • Deactivation
  • Nickel catalysts
  • Syngas production

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