CoB doped acid modified zeolite catalyst for enhanced hydrogen release from sodium borohydride hydrolysis. (29th May 2020)

• Record Type: Journal Article
• Authors: Saka, Cafer; Salih Eygi, Mustafa; Balbay, Asım
• Is Part Of: International journal of hydrogen energy. Volume 45:Number 30(2020)
• Page Start: 15086
• Page End: 15099
• Publication Date: 2020-05-29
• Subjects: Zeolite -- Hydrochloric acid -- Modification -- Support materials -- Catalyst -- Hydrogen; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2020.03.238
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Cobalt-boron (CoB) catalyst supported on zeolite modified with hydrochloric acid (CoB-zeolite-HCl) and zeolite modified with acetic acid (CoB-zeolite-CH3 COOH) is prepared for the hydrogen (H2 ) release from sodium borohydride (NaBH4 ). The supported catalyst samples were characterized by X-ray diffraction spectroscopy (XRD), scanning electron microscope (SEM), Fourier transforms infrared spectroscopy (FTIR), nitrogen adsorption and, inductively coupled plasma optical emission spectroscopy (ICP-OES). The effects of Co metal loading, NaBH4 concentration, NaOH concentration, temperature, and reusability on the catalytic performance of the CoB-zeolite-HCl catalyst were investigated. The completion time of the reaction using the raw zeolite supported CoB catalyst was about 265 min. However, the completion time of the reaction using the CoB-zeolite-HCl catalyst was decreased to about 80 min. BET surface area values showed that there is a 7-fold increase in the specific surface area for the zeolite activated with HCl compared to the BET surface area for the raw zeolite. The activation energy (Ea) of the catalyzed reaction was 42.45 kJ mol −1 . Graphical abstract: Image 1 Highlights: CoB catalyst supported on the zeolite treated with hydrochloric acid was prepared. The completion time with the CoB catalyst supported on raw zeolite was 265 min. The completion time with CoB-zeolite-HCl was 80 min. A 7-fold increase in the surface area with HCl acid-treatment was obtained. Activation energy was found as 42.45 kJ/mol.