Effect of voltage and initial temperature on thermodynamics and kinetics of CO2 hydrate formation in an electrostatic spraying reactor. (15th January 2022)

• Record Type: Journal Article
• Authors: Wang, Lanyun; Zhang, Yajuan; Xie, Huilong; Lu, Xiaoran; Wen, Xinglin; Liu, Zhen; Zhou, Huajian; Liu, Zejian; Xu, Yongliang
• Is Part Of: Energy. Volume 239:Part D(2022)
• Publication Date: 2022-01-15
• Subjects: Gas hydrate -- Electrostatic spraying -- Voltage -- Initial temperature -- Thermodynamics -- Kinetics; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Energy consumption -- Periodicals; 333.7905
• DOI: 10.1016/j.energy.2021.122384
• Languages: English
• ISSNs: 0360-5442

Abstract

Abstract: The effect of electrostatic spraying on the formation of CO2 hydrate was experimentally studied. The effects of voltage (0, 0.5, 1.0, 1.5, 2.0 KV) and initial temperature (285.15, 282.15, 279.15 K) on the morphology, phase equilibrium temperature, induction time, rapid growth time, gas consumption, water to hydrate conversion and gas uptake rate of CO2 hydrate were analyzed. The CO2 hydrate primarily took the wall of the vessel as the nucleation site and grew from wall to the center of the reactor. The main morphological structure of CO2 hydrate were white filaments stacked in arcs, branches, and clusters. Low voltage-high initial temperature and high voltage-low initial temperature were conducive to improving the phase equilibrium temperature of CO2 hydrate. The application of voltage would prolong the induction time and shorten the rapid growth time of CO2 hydrate, and the effect would be more apparent with the increase of voltage. Lowering the initial temperature would shorten the induction time, 23 min was observed at 1.0 KV and the initial temperature of 279.15 K. The gas consumption and water to hydrate conversion change with voltage were in an order of 1.0 > 0>2.0 > 1.5>0.5 KV at the same temperature. Only 1.0 KV could enhance CO2 gas consumption, water to hydrate conversion and gas consumption rate. Highlights: We develop an electrostatic spraying reactor for the formation of CO2 hydrates. The effects of voltage and initial temperature on the thermodynamics and kinetics of CO2 hydrate are reported. Applying voltage will prolong the induction time. Lowering the initial temperature will shorten the induction time. This method greatly increases CO2 gas consumption and water to hydrate conversion.