The increase of carbon dioxide content in the air leads to global climate problems. Gas hydrate can effectively separate carbon dioxide from power plant flue gas, which is of great significance to improve the environment. In this work, the CO2/N2 mixed gas hydrate formation in silica gel bed was studied under pressure and temperature ranges of (6.0 - 8.0 MPa) and (-20 - -5oC), respectively. Results showed that the mixed gas hydrate formed immediately when the flue gas was pressurized into the reactor, and the induction time was less than 1 min. The normalized gas consumption was larger at higher pressure or lower temperature. The largest normalized gas consumption was 0.115 (mol/mol), and the highest water conversion was 77.02mol%. Pressure had no effect on the normalized rate of gas consumed for the first 30 min. The gas proportion of N2 in equilibrium gas increased with the final gas consumption increase. The highest gas proportion of N2 in equilibrium gas was 90.95mol%. CO2 proportion in the hydrate was higher at lower hydrate formation driving force. The highest CO2 proportion in the hydrate was 65.70mol% at 6.0 MPa and -5oC.
LIU Jun
,
LIANG De-qing
. Investigation on CO2/N2 Mixed Gas Hydrate Formation in a Silica Gel Bed[J]. Advances in New and Renewable Energy, 2019
, 7(4)
: 309
-317
.
DOI: 10.3969/j.issn.2095-560X.2019.04.003
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