Calcium silicate-based catalytic filters for partial oxidation of methane and biogas mixtures: Preliminary results

Tezel E., Balkanlı Ünlü E., Figen H. E., Baykara Z. S.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, cilt.45, sa.60, ss.34739-34748, 2020 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 45 Sayı: 60
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1016/j.ijhydene.2020.09.015
  • Dergi Adı: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED)
  • Sayfa Sayıları: ss.34739-34748
  • Anahtar Kelimeler: Hydrogen production, Catalytic filter, Partial oxidation of methane, Partial oxidation of biogas, SYNTHESIS GAS, BIOMASS GASIFICATION, HYDROGEN-PRODUCTION, RARE-EARTH, SYNGAS, METAL, PERFORMANCE, CONVERSION, OXIDE, BED
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

Development and testing of catalytic filters for partial oxidation of methane to increase hydrogen production in a biomass gasification process constitute the subject of the present study. Nickel, iron and lanthanum were coated on calcium silicate filters via co-impregnation technique, and catalytic filters were characterized by ICP-MS, XPS, XRD, TEM, TGA, TPR and BET techniques. The influences of varying reaction temperature and addition of Fe or La to Ni-based catalytic filters on methane conversion, and hydrogen selectivity have been investigated in view of preliminary results obtained from reactions with 6% methane-nitrogen mixture, and catalytic filters were tested with model biogas mixtures at optimum reaction temperature of each filter which were 750 degrees C or 850 degrees C. Approximately 93% methane conversion was observed with nearly 6% methane-nitrogen mixture, and 97.5% methane conversion was obtained with model biogas containing CH4 which is 6%, CO2, CO, and N-2 at 750 degrees C. These results indicate that calcium silicate provides a suitable base material for catalytic filters for partial oxidation of methane and biogas containing methane. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.