Multi-tube tantalum membrane reactor for HIx processing section of IS thermochemical process |
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| Affiliation: | 1. Membrane Development Section, Chemical Engineering Group, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India;2. Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai, 400094, India;3. Powder Metallurgy Division, Bhabha Atomic Research Centre, Vashi Complex, Navi Mumbai, 400705, India;4. Chemical Technology Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India;5. Glass & Advance Materials Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India;6. Heavy Water Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India;1. Department of Nuclear Energy, International Atomic Energy Agency (IAEA), Vienna International Centre, P. O. Box 200, A-1400, Vienna, Austria;2. Faculty of Engineering, Mansoura University, Mansoura, Egypt;1. Saint-Petersburg State University, Physics Faculty, St. Petersburg 198504, Ulianovskaja ul. 3, Russia;2. Bonch-Bruevich Saint-Petersburg State University of Telecommunications, 22/1 Prospekt Bolshevikov, St. Petersburg 193232, Russia;1. Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India;2. Department of Chemical Engineering and Technology, Indian Institute of Technology (BHU) Varanasi, Varanasi, 221005, Uttar Pradesh, India;1. National Center of Meat Quality & Safety Control, Nanjing Agricultural University, Nanjing 210095, PR China;2. Synergetic Innovation Center of Food Safety & Nutrition, Nanjing 210095, PR China;3. Quality and Safety Assessment Research Unit, Agricultural Research Service, USDA, Athens, GA 30605, USA;1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China;2. Otto Schott Institute of Materials Research, Friedrich-Schiller-Universität, Jena 07743, Germany;3. Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, PR China |
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| Abstract: | HIx processing section of Iodine-Sulphur (IS) thermochemical cycle dictates the overall efficiency of the cycle, which poses extremely corrosive HI–H2O–I2 environment, coupled with a very low equilibrium conversion (~22%) of HI to hydrogen at 450 °C. Here, we report the fabrication, characterization and operation of a 4-tube packed bed catalytic tantalum (Ta) membrane reactor (MR) for enhanced HI decomposition. Gamma coated clay-alumina tubes were used as supports for fabrication of Ta membranes. Clay-alumina base support was fabricated with 92% alumina (~8 μm particle size) and 8% clay (~10 μm particle size), sintered at a temperature of 1400 °C. An intermediate gamma alumina coating was provided with 4% polyvinyl butyral as binder for a 10% solid loading. Composite alumina tubes were coated with thin films of Ta metal of thickness <1 μm using DC magnetron sputter deposition technique. The 4-tube Ta MR assembly was designed and fabricated with integration of Pt-alumina catalyst for carrying out the HI decomposition studies, which offered >80% single-pass conversion of HI to hydrogen at 450 °C. The hydrogen throughput of the reactor was ~30 LPH at a 2 bar trans-membrane pressure, with >99.95% purity. This is the first time a muti-tube MR is reported for HIx processing section of IS process. |
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| Keywords: | Hydrogen IS thermochemical Cycle Ta metal membrane Multi-tube membrane reactor |
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