Preparation of CoB catalysts supported on raw and Na-exchanged bentonite clays and their application in hydrogen generation from the hydrolysis of NaBH4 |
| |
| Affiliation: | 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. Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, 066004, PR China;2. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, PR China;1. Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, School of Chemistry and Chemical Engineering, China West Normal University, Nanchong, 637002, Sichuan, China;2. Chengdu Institute of Geology and Mineral Resources, Chengdu, 610081, Sichuan, China;3. Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia;1. School of Materials and Chemical Engineering, Xi''an Technological University, Xi''an 710021, China;2. School of Food and Bioengineering, Xihua University, Chengdu 610065, China;1. School of Materials and Chemical Engineering, Xi''an Technological University, Xi''an 710021, China;2. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi''an, 710072, China |
| |
| Abstract: | The aim of this work is to prepare CoB catalysts supported on raw bentonite (CoB/bentonite) and Na-exchanged bentonite (CoB/Na-bentonite) by the impregnation and chemical reduction method. The prepared catalysts were characterized using X-ray diffractometry (XRD), X-ray fluorescence spectroscopy (XRF), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and Fourier transform infrared spectroscopy (FTIR) techniques. The activities of the catalysts were tested in the hydrolysis reaction of sodium borohydride (NaBH4) in a semi-batch system. The volume of the evolved hydrogen gas was determined by a water displacement method. The effects of catalyst amount, NaOH (a base stabilizer) concentration, NaBH4 concentration and solution temperature on the hydrogen generation rate were investigated. The maximum hydrogen generation rates were determined as 921.94 mL/min.gcat for CoB/bentonite and 1601.45 mL/min.gcat for CoB/Na-bentonite when the 5 wt % NaBH4 and 10 wt % NaOH solutions were used at 50 °C. The activation energies (Ea) of the hydrolysis reaction over CoB/bentonite and CoB/Na-bentonite were determined as 55.76 and 56.61 kJ/mol, respectively. |
| |
| Keywords: | Bentonite Catalyst CoB Hydrogen generation Hydrolysis Sodium borohydride |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
