Print Email Facebook Twitter Supercritical water oxidation of quinoline with moderate preheat temperature and initial concentration Title Supercritical water oxidation of quinoline with moderate preheat temperature and initial concentration Author Ren, M. (TU Delft Fluid Mechanics; Xian Jiaotong University) Wang, Shuzhong (Xian Jiaotong University) Yang, Chuang (Xian Jiaotong University) Xu, Haitao (Xian Jiaotong University) Guo, Yang (Xian Jiaotong University) Roekaerts, D.J.E.M. (TU Delft Fluid Mechanics) Date 2019 Abstract This work reports an experimental study on supercritical water oxidation of quinoline. Moderate preheat temperature (420 °C–510 °C) and initial concentration (1 wt%–10 wt%) are selected to address the possibility of utilizing the heat released during the reaction, in order to realize high conversion rate at relatively low preheat temperature. The effects of temperature, residence time, oxidation ratio, pressure and concentration are analyzed. The results show that considerable conversion can happen at relatively low preheat temperature, while increase in temperature will significantly promote the complete conversion. The yield of carbon dioxide increases with the residence time but there is an upper limit due to the stronger dependence on oxidizer concentration, for which an estimated reaction order is 1.90. When the quinoline concentration is larger than 8 wt%, clear exothermic peaks with temperature rise about 100 °C are detected. These exothermic peaks can be interpreted as a sign of ignition interrupted by the heat loss to the surrounding salt bath. An analogy is made between the start temperatures of these exothermic peaks and the ignition temperatures reported in methanol and isopropanol hydrothermal flame research. We conclude that quinoline solutions can be ignited without co-fuels, at comparable ignition temperature as methanol and isopropanol around 450 °C. Subject Heat releaseIgnitionInitial concentrationPreheat temperatureQuinolineSupercritical water oxidation (SCWO) To reference this document use: http://resolver.tudelft.nl/uuid:f58aa038-8395-454c-b6e9-cadc05120201 DOI https://doi.org/10.1016/j.fuel.2018.09.091 Embargo date 2020-09-29 ISSN 0016-2361 Source Fuel: the science and technology of fuel and energy, 236, 1408-1414 Bibliographical note Accepted Author Manuscript Part of collection Institutional Repository Document type journal article Rights © 2019 M. Ren, Shuzhong Wang, Chuang Yang, Haitao Xu, Yang Guo, D.J.E.M. Roekaerts Files PDF SCWOquinoline_revise.pdf 631.05 KB Close viewer /islandora/object/uuid:f58aa038-8395-454c-b6e9-cadc05120201/datastream/OBJ/view