Ethylene glycol as an alternative solvent approach for very efficient hydrogen production from sodium borohydride with phosphoric acid and acetic acid catalysts |
| |
Affiliation: | 1. Faculty of Health Science, Siirt University, 56100 Siirt, Turkey;2. Arapgir Vocational School, Malatya Turgut Ozal University, Malatya, Turkey |
| |
Abstract: | For the first time, phosphoric acid (H3PO4) and acetic acid (CH3COOH) catalysts were used for efficient hydrogen (H2) production from sodium borohydride (NaBH4) ethylene glycolysis reaction. In this experimental study, the effects of ethylene glycol/water ratio, ethylene glycol/acid ratio, NaBH4 concentration, acid concentration, and temperature were investigated. These ethylene glycol/water ratio experiments showed that the use of water alongside ethylene glycol negatively affects H2 production. The hydrogen generation rate (HGR) values obtained for this ethylene glycolysis reaction with 1 M H3PO4 and 1 M CH3COOH catalysts are 5800 and 4542 mLmin-1, respectively. Also, the completion times of ethylene glycolysis reactions with these acids are 8 and 10 s, respectively. The n value obtained for ethylene glycolysis reactions according to the power-law kinetic model was 0.50. The activation energies obtained with H3PO4 and CH3COOH catalysts were 24.45 kJ mol?1and 33.23 kJ mol?1, respectively. |
| |
Keywords: | Sodium borohydride Ethylene glycolysis Phosphoric acid Acetic acid Hydrogen |
本文献已被 ScienceDirect 等数据库收录! |
|