Hydrogen transferring liquefaction of some bituminous coals with hydrogenated fluoranthene under high temperature-short contact time conditions |
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| Affiliation: | 7. Research Institute of Industrial Science, Graduate School of Engineering Sciences, Kyushu University 86, Kasuga 816, Fukuoka, Japan;1. Department of Molecular Engineering, Graduate School of Engineering Sciences, Kyushu University 86, Kasuga 816, Fukuoka, Japan;1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, PR China;2. China Shenhua Coal to Liquid and Chemical Co. Ltd., Beijing 100011, PR China;1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China;2. College of Chemistry and Materials, Taiyuan Normal University, Jinzhong 030619, China;1. Key Laboratory of Coal Clean Conversion & Chemical Engineering Process, College of Chemical Engineering, Xinjiang University, Urumqi, 830046, Xinjiang Uygur Autonomous Region, China;2. College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao, Shandong, 266590, China;3. National Institute of Clean and Low-Carbon Energy, Beijing, 102211, China;4. Key Laboratory of Coal Processing and Efficient Utilization, Ministry of Education, China University of Mining & Technology, Xuzhou, 221116, Jiangsu, China |
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| Abstract: | Hydrogen transferring liquefaction using hydrogenated fluoranthene at high temperatures was very effective for three Japanese bituminous coals, with a total yield of oil and asphaltene > 85 wt%. The high temperature-short contact time conditions (480 °C for 10 min or 510 °C for 2.5 min) resulted in a total yield of > 90 wt% from the coal of lowest rank, with low consumption of hydrogenated fluoranthene. The oil yields were as high as 75 and 68 wt% at 480 °C and 510 °C, respectively. In contrast, the lower temperature of 450 °C appeared more effective in diminishing preasphaltene formation with the highest rank coal providing oil and asphaltene yields of 47 and 38 wt%, respectively. Longer times or higher temperature increased the oil yield but without reducing the preasphaltene. Higher temperature was found favourable for the formation of asphaltene of lower molecular weight. The reactivity of butiminous coals of different rank is discussed from the viewpoint of their structure. |
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