Synergistic effects on co-pyrolysis of lignite and high-sulfur swelling coal |
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| Affiliation: | 1. Department of Chemical Engineering for Energy, East China University of Science and Technology, 130# Meilong Road, Shanghai 200237, China;2. Key Laboratory of Coal Gasification of Ministry of Education, East China University of Science and Technology, 130# Meilong Road, Shanghai 200237, China;1. Faculty of Science, Monash University, Australia;2. Geotechnical and Hydrogeological Engineering Research Group (GHERG), Federation University Australia, Australia;1. Department of Earth Sciences, Sapienza University of Rome, P. le Aldo Moro, 5, 00185 Rome, Italy;2. Dipartimento di Scienze della Terra, Università di Firenze, Via La Pira 4, I-50121 Florence, Italy;3. Department of Physics and Princeton Center for Theoretical Science, Princeton University, Princeton, NJ 08544, USA;4. Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC 20015, USA;1. Department of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milan, Italy;2. Center for The Study of Atherosclerosis, Bassini Hospital, Cinisello Balsamo, Italy;3. The Blizard Institute, Centre for Diabetes, Barts and The London School of Medicine & Dentistry, Queen''s Mary University, London, UK;4. IRCCS Multimedica, Milan, Italy;1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;2. Key Laboratory of Systems Bioengineering, Ministry of Education, Tianjin University, Tianjin 300072, China;3. Tianjin University Helmholtz-Zentrum Geesthacht, Joint Laboratory for Biomaterials and Regenerative Medicine, Weijin Road 92, 300072 Tianjin, China;4. Tianjin University Helmholtz-Zentrum Geesthacht, Joint Laboratory for Biomaterials and Regenerative Medicine, Kantstr. 55, 14513 Teltow, Germany;5. Collaborative Innovation Center of Chemical Science and Chemical Engineering (Tianjin), Weijin Road 92, Tianjin 300072, China;6. Department of Physiology and Pathophysiology, Longistics University of Chinese People’s Armed Police Force, Tianjin 300162, China |
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| Abstract: | Co-pyrolysis of a lignite coal and a bituminous coal was carried out on a fixed-bed reactor. The lignite was enriched with calcium, and the bituminous coal featured in high sulfur and strong swelling. Experiments were also conducted for the blends using the acid-washed lignite and/or the acid washed bituminous coal to address the influences of calcium in the lignite on the synergistic behaviors. Calcium in the lignite exhibited some aspects of synergy including the catalytic cracking reactions of tar, the retention of sulfur in the char, and the catalyzed polyaromatization and gasification of char. These synergies impacted the differences in the product distribution and gas composition between the co-pyrolytic results and the additive ones. Moreover, there appeared to be a synergistic effect on the cross-linking reaction of volatile matter, resulting in an increase in the char yield irrespective of coal demineralization. The co-pyrolysis was also observed to destroy the swelling of coal. This synergistically increased the tar yield due to less resistant escaping of tar from the intra-particles of coal. |
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