The Production of NaBH4 from Its Elements by Mechano-chemical Reaction and Usage in Hydrogen Recycle

Cakanyildirim C., Guru M.

ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS, cilt.33, sa.20, ss.1912-1920, 2011 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 33 Sayı: 20
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1080/15567030903503175
  • Dergi Adı: ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1912-1920
  • Anahtar Kelimeler: dehydrogenation, hydrogen carrier, hydrogen storage, NaBH4, solid phase reaction, SODIUM-BOROHYDRIDE, METABORATE, MAGNESIUM, BORATE
  • Gazi Üniversitesi Adresli: Evet

Özet

In this study, sodium borohydride (NaBH4) is synthesized from Na and MgH2 in the presence of B2O3 that behaves as a stickiness inhibitor and boron source. All experiments are performed under argon atmosphere via ball milling, without applying high temperature or pressure. An optimum synthesized parameter is searched with reaction time and stochiometric ratio. Mechano-chemical reactor working time is varied from 100 to 1,100 min, while stoichiometry of B2O3/Na ranges over 0.6-1.4, and MgH2 is used 30% in excess. FT-IR and XRD instruments are utilized to analyze the products. Additionally, hydrogen contents of the untreated products are measured with the inverse burette technique. Consequently, results show that long reaction times favor the yield. Moreover, equalizing the amounts of B2O3 and MgH2 can raise NaBH4 yield to 25% or more.