Optimization of synthesis parameters for catalytic performance of Ni–B catalysts using response surface methodology

TÜRKCAN J. H., Elçiçek H., ÖZDEMİR O. K.

International Journal of Hydrogen Energy, cilt.46, sa.11, ss.7903-7911, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 46 Sayı: 11
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1016/j.ijhydene.2020.11.270
  • 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.7903-7911
  • Anahtar Kelimeler: Hydrogen generation, Nickel-boride catalyst, Sodium borohydride hydrolysis, Response surface methodology, Taguchi method
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

Hydrogen production through hydrolysis of sodium borohydride (NaBH4) by using metal catalysts is promising for fuel cell applications. Nickel (Ni) and its alloys are favorable due to their high catalytic activity, relatively low cost and availability. In present study, the effects of temperature, pH, reduction rate and reducing agent concentration, which significantly affect the catalyst performance, were investigated using the response surface methodology (RSM). A mathematical model was derived according to results which were obtained from four-level orthogonal Taguchi L16 (44) experimental design used for the optimization of multiple parameters in the process. From the RSM analyses, that compatible with the predicted experimental results, maximum hydrogen generation rate (HGR) 49.81 L min−1 gcat−1 was obtained temperature of 278.12 K, pH of 5.52, reducing agent concentration of 85.96 NaBH4.water−1 and reduction rate of 6.82 mL min−1. Analysis of variance reveals that both pH and rate of reduction have significant effect than the temperature on the HGR.