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Design of a novel biohythane process with high H2 and CH4 production rates

Författare:
Publiceringsår: 2012
Språk: Engelska
Sidor: 17749-17762
Publikation/Tidskrift/Serie: International Journal of Hydrogen Energy
Volym: 37
Nummer: 23
Dokumenttyp: Artikel
Förlag: Elsevier

Sammanfattning

A biohythane process based on wheat straw including: i) pretreatment, ii) H2 production using Caldicellulosiruptor saccharolyticus, iii) CH4 production using an undefined consortium, and iv) gas upgrading using an amine solution, was assessed through process modelling including cost and energy analysis. According to simulations, a biohythane gas with the composition 46–57% H2, 43–54% CH4 and 0.4% CO2, could be produced at high production rates (2.8–6.1 L/L/d), with 93% chemical oxygen demand (COD) reduction, and a net energy yield of 7.4–7.7 kJ/g dry straw. The model was calibrated and verified using experimental data from dark fermentation (DF) of wheat straw hydrolysate, and anaerobic digestion of DF effluent. In addition, the effect of gas recirculation was investigated by both wet experiments and simulation. Sparging improved H2 productivities and yields, but negatively affected the net energy gain and cost of the overall process.

Disputation

Nyckelord

  • Technology and Engineering
  • Caldicellulosiruptor saccharolyticus
  • Biohythane
  • ADM1
  • Biohydrogen
  • Gas upgrading
  • UASB

Övriga

Published
Yes
  • ISSN: 0360-3199

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