Performance Assessment Study on the Na-O-H Thermochemical Water Splitting Cycle for Hydrogen Generation

Oruc O., DİNCER İ.

CHEMICAL ENGINEERING & TECHNOLOGY, vol.44, no.8, pp.1512-1518, 2021 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 44 Issue: 8
  • Publication Date: 2021
  • Doi Number: 10.1002/ceat.202000497
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Applied Science & Technology Source, Biotechnology Research Abstracts, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Page Numbers: pp.1512-1518
  • Keywords: Hydrogen production reaction, Hydrolysis reaction, Metal separation reaction, Thermochemical cycle, Water splitting
  • Yıldız Technical University Affiliated: Yes


The sodium-oxygen-hydrogen (Na-O-H) thermochemical cycle is investigated, as one of the potential methods of thermochemical water decomposition and hydrogen generation. The hydrogen production reaction, metal separation reaction, and hydrolysis reaction, forming the Na-O-H thermochemical cycle, are examined by RGibbs reactor modeling. The parameters for the three reactions are optimized in terms of hydrogen yield, pressure, temperature, and heat requirement. The metal separation reaction is carried out under vacuum pressure, while other reactions can be conducted under atmospheric pressure.