Influence of process parameters on enhanced hydrogen evolution from alcoholysis of sodium borohydride with a boric acid catalyst |
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| Affiliation: | 1. Healthy School, Siirt University, Turkey;2. Arapgir Vocational School, Malatya Turgut Ozal University, Turkey;1. School of Health, Safety and Health at Work, Siirt University, 56100, Siirt, Turkey;2. Technical Services Vocational High School, Department of Electric and Energy, Siirt University, 56100, Siirt, Turkey;3. Faculty of Engineering, Department of Electrical and Electronics Engineering, Siirt University, 56100, Siirt, Turkey;4. Faculty of Engineering, Department of Chemical Engineering, Siirt University, 56100, Siirt, Turkey;1. Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, PR China;2. Guangxi Collaborative Innovation Center of Structure and Property for New Energy Materials, Guilin 541004, PR China;3. Engineering Research Center of Ministry of Education for Electronic Information Materials and Devices, PR China;1. School of Chemical Engineering, Northwest University, Xi’an 710069, China;2. Institute of Materials, Chinese Academy of Engineering Physics, Jiangyou 621908, China;1. College of Chemistry and Life Science, Shenyang Normal University, Shenyang 110034, PR China;2. Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Collaborative Innovation Center of Chemical Science and Engineering, College of Chemistry, Nankai University, Tianjin 300071, PR China;3. Experimental Center, Shenyang Normal University, Shenyang 110034, PR China;1. State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, PR China;2. Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, Hangzhou 310013, PR China |
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| Abstract: | The hydrogen evolution via alcoholysis reaction of sodium borohydride with an H3BO3 catalyst was carried out for the first time. In the process of methanol and NaBH4 (NaBH4-MR), the effects of the H3BO3 and NaBH4 concentration, and temperature parameters were examined and evaluated. The hydrogen yields by the NaBH4-MR, NaBH4 ethanolysis (NaBH4-ER) and NaBH4 hydrolysis reactions (NaBH4-HR) with 0.2 M H3BO3 catalyst are 99, 62, and 88% compared to the theoretical hydrogen yield, respectively. The completion times of the NaBH4-MR using the H3BO3 concentrations of 0.2, 0.4, 0.5, 1 M, and saturated acid solution were about 50, 15, 10, 2 and 1 min, respectively. The hydrogen yields obtained with 50, 15, 10, 2, and 1 min for the same acid concentration values were about 100% compared to the theoretical hydrogen value. By increasing the H3BO3 concentration from 0.2 M to the saturated H3BO3 concentration, the completion time of this NaBH4-MR process was reduced by approximately 50 times, resulting in a significant result. The activation energy (Ea) of the NaBH4-MR with the H3BO3 catalyst was 57.3 kJ/mol. |
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| Keywords: | Methanolysis Ethanolysis Hydrolysis Hydrogen |
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