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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

HEAT FLOW AND TEMPERATURE CHANGES IN CO2 HYDRATE DISSOCIATION/REFORMATION PROCESS USING DSC TECHNIQUE

Get access (open in a dialog) DOI: 10.1615/IHTC16.mpf.023525
pages 6321-6327

Abstract

Carbon dioxide (CO2) hydrate has been the interesting subject as a potential way to store carbon dioxide. The formation and dissociation properties of carbon dioxide hydrates are needed to be studied. In this study, three experiments including formation and dissociation process of carbon dioxide hydrate were carried out, and it was monitored by a high-pressure micro differential scanning calorimeter (µ-DSC). The deionized water was injected in the cell and the CO2 was charged to 3.0, 3.1 or 3.2 MPa at 293.15 K. The isochoric temperature programming mode was used during the formation and dissociation. The cell temperature was reduced to 274.15 K at a rate of 0.7 K / min, and then the temperature was decreased to 253.15 K at a rate of 0.5 K/min, after that the temperature was increased to 274.15 K at a rate of 0.5 K/min, and the temperature was kept at 274.15 K for 1h, and then the temperature was increased at different rates. Different pressure and different heating rates were investigated. And hydrate reformation was observed during the dissociation of carbon dioxide hydrate. The results showed that the heating rate and pressure had significant effect on the CO2 hydrate reformation. This study might have a certain effect on the carbon dioxide storage based on hydrate method.