Microwave-assisted, performance-advantaged electrification of propane dehydrogenation
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- Yeonsu Kwak
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy St., Newark, DE 19716, USA.
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- Cong Wang
- RAPID Manufacturing Institute, Catalysis Center for Energy Innovation and Delaware Energy Institute, 221 Academy St., Newark, DE 19716, USA.
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- Chaitanya A. Kavale
- Department of Chemical Engineering, Indian Institute of Technology (IIT) Madras, Chennai, Tamil Nadu 600036, India.
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- Kewei Yu
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy St., Newark, DE 19716, USA.
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- Esun Selvam
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy St., Newark, DE 19716, USA.
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- Reyes Mallada
- Instituto de Nanociencia y Materiales de Aragón (INMA), Consejo Superior de Investigaciones Científicas (CSIC-Universidad de Zaragoza), Zaragoza 50018, Spain.
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- Jesus Santamaria
- Instituto de Nanociencia y Materiales de Aragón (INMA), Consejo Superior de Investigaciones Científicas (CSIC-Universidad de Zaragoza), Zaragoza 50018, Spain.
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- Ignacio Julian
- CIRCE Foundation, Zaragoza 50018, Spain.
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- Jose M. Catala-Civera
- ITACA Institute, Universitat Politècnica de València, Valencia 46022, Spain.
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- Himanshu Goyal
- Department of Chemical Engineering, Indian Institute of Technology (IIT) Madras, Chennai, Tamil Nadu 600036, India.
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- Weiqing Zheng
- RAPID Manufacturing Institute, Catalysis Center for Energy Innovation and Delaware Energy Institute, 221 Academy St., Newark, DE 19716, USA.
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- Dionisios G. Vlachos
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy St., Newark, DE 19716, USA.
書誌事項
- 公開日
- 2023-09-15
- DOI
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- 10.1126/sciadv.adi8219
- 公開者
- American Association for the Advancement of Science (AAAS)
説明
<jats:p> Nonoxidative propane dehydrogenation (PDH) produces on-site propylene for value-added chemicals. While commercial, its modest selectivity and catalyst deactivation hamper the process efficiency and limit operation to lower temperatures. We demonstrate PDH in a microwave (MW)–heated reactor over PtSn/SiO <jats:sub>2</jats:sub> catalyst pellets loaded in a SiC monolith acting as MW susceptor and a heat distributor while ensuring comparable conditions with conventional reactors. Time-on-stream experiments show active and stable operation at 500°C without hydrogen addition. Upon increasing temperature or feed partial pressure at high space velocity, catalysts under MWs show resistance in coking and sintering, high activity, and selectivity, starkly contrasting conventional reactors whose catalyst undergoes deactivation. Mechanistic differences in coke formation are exposed. Gas-solid temperature gradients are computationally investigated, and nanoscale temperature inhomogeneities are proposed to rationalize the different performances of the heating modes. The approach highlights the great potential of electrification of endothermic catalytic reactions. </jats:p>
収録刊行物
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- Science Advances
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Science Advances 9 (37), 2023-09-15
American Association for the Advancement of Science (AAAS)
