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Influence of process parameters on enhanced hydrogen generation via semi-methanolysis and semi-ethanolysis reactions of sodium borohydride using phosphoric acid
Affiliation:1. Siirt University, School of Healthy, 56100 Siirt, Turkey;2. Siirt University, Faculty of Engineering, 56100 Siirt, Turkey;1. Center of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, P.O. Box 80203, Jeddah, 21589, Saudi Arabia;2. Department of Chemistry, King Abdulaziz University, P.O. Box 80203, Jeddah, 21589, Saudi Arabia;1. Department of Biology, Faculty of Science, Erciyes University, 38039, Kayseri, Turkey;2. Department of Mechanical Engineering, Faculty of Engineering, Siirt University, 56100, Siirt, Turkey;3. Energy Division, Department of Mechanical Engineering, Faculty of Engineering, Erciyes University, 38039, Kayseri, Turkey;4. Siirt University, Department of Chemical Engineering, Siirt, Turkey;5. Institute of Chemistry, Bioscience and Environmental Engineering, Faculty of Science and Technology, University of Stavanger, Box 8600 Forus, 4036, Stavanger, Norway;6. Department of Chemistry, Faculty of Science, Erciyes University, 38039, Kayseri, Turkey;1. School of Materials Science and Engineering, Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, South China University of Technology, Guangzhou, 510641, PR China;2. School of Natural Sciences and Queensland Micro- and Nanotechnology Centre, Griffith University, Nathan, QLD 4111, Australia;3. China–Australia Joint Laboratory for Energy & Environmental Materials, Joint Venture of Griffith University and South China University of Technology, Nathan, QLD 4111, Australia;1. Faculty of Health Science, Siirt University, 56100 Siirt, Turkey;2. Arapgir Vocational School, Malatya Turgut Ozal University, Malatya, Turkey
Abstract:The sodium borohydride(NaBH4) semi-methanolysis and semi-ethanolysis reactions to produce hydrogen are investigated using phosphoric acid(H3PO4) for the first time. The NaBH4 concentration, H3PO4 concentration, and temperature parameters on these semi-alcoholysis reactions are evaluated. The normalized hydrogen generation rates (HGRs) obtained from the NaBH4 semi-methanolysis and semi-ethanolysis acidified using 0.5 M H3PO4 are 11684 and 9981 ml min?1 g?1, respectively. Moreover, the completion times of these semi-methanolysis and semi-ethanolysis reactions with 0.5 M H3PO4 acid concentration are 0.10 and 0.116 min, respectively. Kinetic studies with the power-law model are evaluated. The activation energies(Ea) obtained for the NaBH4 semi-methanolysis and semi-ethanolysis using 0.5 M H3PO4 are 9.08 and 32.47 kJ mol?1, respectively.
Keywords:Sodium borohydride  Phosphoric acid  Semi-methanolysis  Semi-ethanolysis  Hydrogen
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