Syngas production from glycerol-dry(CO2) reforming over La-promoted Ni/Al2O3 catalyst

Kah Weng Siew, Hua Chyn Lee, Jolius Gimbun, Sim Yee Chin, Maksudur R. Khan, Yun Hin Taufiq-Yap, Chin Kui Cheng

Research output: Contribution to journalArticlepeer-review

80 Scopus citations

Abstract

A 3wt% La-promoted Ni/Al2O3 catalyst was prepared via wet co-impregnation technique and physicochemically-characterized. Lanthanum was responsible for better metal dispersion; hence higher BET specific surface area (96.0m2g-1) as compared to the unpromoted Ni/Al2O3 catalyst (85.0m2g-1). In addition, the La-promoted catalyst possessed finer crystallite size (9.1nm) whilst the unpromoted catalyst measured 12.8nm. Subsequently, glycerol dry reforming was performed at atmospheric pressure and temperatures ranging from 923 to 1123K employing CO2-to-glycerol ratio from zero to five. Significantly, the reaction results have yielded syngas as main gaseous products with H2:CO ratios always below than 2.0 with concomitant maximum 96% glycerol conversion obtained at the CO2-to-glycerol ratio of 1.67. In addition, the glycerol consumption rate can be adequately captured using power law modelling with the order of reactions equal 0.72 and 0.14 with respect to glycerol and CO2 whilst the activation energy was 35.0 kJ mol-1. A 72h longevity run moreover revealed that the catalyst gave a stable catalytic performance.

Original languageBritish English
Pages (from-to)441-447
Number of pages7
JournalRenewable Energy
Volume74
DOIs
StatePublished - 1 Feb 2015

Keywords

  • Dry reforming
  • Glycerol
  • Lanthanum
  • Nickel catalyst
  • Syngas

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