Hydrogen production from low temperature supercritical water Co-Gasification of low rank lignites with biomass

Faki E., Uzden Ş., SEÇER A., HASANOĞLU A.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, cilt.47, sa.12, ss.7682-7692, 2022 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 47 Sayı: 12
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1016/j.ijhydene.2021.12.125
  • Dergi Adı: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Artic & Antarctic Regions, Chemical Abstracts Core, Communication Abstracts, Environment Index, INSPEC
  • Sayfa Sayıları: ss.7682-7692
  • Anahtar Kelimeler: Hydrogen, Sorghum, Coal, Supercritical water co-gasification, FLUIDIZED-BED, LIGNOCELLULOSIC BIOMASS, CATALYTIC GASIFICATION, STEAM GASIFICATION, CHAR GASIFICATION, SORGHUM BIOMASS, METAL CATALYSTS, FIXED-BED, REACTIVITY, ALKALI
  • Çukurova Üniversitesi Adresli: Evet

Özet

Co-gasification of low rank lignite (can) with sorghum energy crop was investigated under low temperature conditions with supercritical water (773 K, 26.9 MPa). The effects of the water volume in the reactor, blending ratios of the coal/sorghum mixtures, the use of different catalysts, and the variation of feedstock concentrations on the gasification efficiency, product distribution, and hydrogen yields were evaluated. Synergistic effects were observed for both the gasification efficiency and the hydrogen yield with a coal content of 25 wt% in the coal/biomass mixture. Increasing the initial water volume, decreasing the feedstock concentration, and using the alkali metal catalysts Na2CO3 and K2CO3 significantly increased the gasification efficiency and the hydrogen yield. In experiments with CaO, almost all the carbon dioxide formed was isolated from the gas product during gasification, and the hydrogen yield was more than 70%. The liquid products were mainly composed of alkylphenols and their derivatives. (C) 2021 Published by Elsevier Ltd on behalf of Hydrogen Energy Publications LLC.