Application of a micro-channel reactor for process intensification in high purity syngas production via H2O/CO2 co-splitting |
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Authors: | Nonchanok Ngoenthong Vut Tongnan Thana Sornchamni Nuchanart Siri-nguan N. Laosiripojana Unalome Wetwatana Hartley |
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Affiliation: | 1. Chemical and Process Engineering, The Sirindhorn International Thai-German Graduate School of Engineering (TGGS), King Mongkut''s University of Technology North Bangkok, Bangkok, 10800, Thailand;2. PTT Public Company Limited, 555 Vibhavadi Rangsit Road, Chatuchak, Bangkok, 10900, Thailand;3. Joint Graduate School of Energy and Environment (JGSEE), King Mongkut''s University of Technology Thonburi, Bangkok, 10140, Thailand |
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Abstract: | A stainless steel micro-channel reactor was tailor-made to an in house-design for process intensification propose. The reactor was used for a two-step thermochemical cycles of H2O and CO2 co-splitting reaction, in the presence of La0.3Sr0.7Co0.7Fe0.3O3 (LSCF). LSCF was coated inside the reactor using wash-coat technique. Oxygen storage capacity of LSCF was determined at 4465 μmol/g, using H2-TPR technique. H2O-TPSR and CO2-TPSR results suggested that a formation of surface hydroxyl group was the cause of H2O splitting favorable behavior of LSCF. Optimal operating reduction/oxidation temperature was found at 700 °C, giving 2266 μmol/g of H2, 705 μmol/g of CO, and 67% of solid conversion, when the H2O and CO2 ratio was 1 to 1, and WSHV was 186,000 mL/g.h. Activation energy of H2O spitting and CO2 splitting was estimated at 87.33 kJ/mol, and 102.85 kJ/mol The pre-exponential factor of H2O splitting and CO2 splitting was 595.24 s?1 and 698.79 s?1, respectively. |
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Keywords: | Thermochemical cycles Micro-channel reactor Perovskite LSCF Kinetics |
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