期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 36, 期 1, 页码 1115-1121出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2010.09.062
关键词
Gas hydrate; Integrated gasification combined; cycle; Tetra-n-butyl ammonium bromide; Carbon dioxide; Fossil fuels; Pre-combustion capture
资金
- Korea Institute of Energy Technology Evaluation and Planning (KETEP) [2008NHY08P0200002009]
- Ministry of Knowledge and Economy (MKE)
In this study, we investigated the effect of tetra-n-butyl ammonium bromide (TBAB) on separation and/or collection of CO2 from CO2/H-2 (40:60) gas mixture via hydrate crystallization. The phase equilibrium conditions shifted to milder conditions as increasing the amount of TBAB additive up to 3.0 mol%. The existence of the critical concentration of the additive effects on the phase equilibrium conditions was also observed. The hydrate formation rate in 1.0 mol% TBAB solution showed the highest value while the hydrate formation rate in 3.0 mol% TBAB solution showed the lowest value. Raman analyses revealed that only CO2 gas molecules enclathrated under experimental conditions carried out in this study. The phase equilibrium temperature of CO2-H-2 (40:60) mixture gas hydrate systems with TBAB additive located in the range of between 283 and 290 K at the integrated gasification combined cycle (IGCC) process pressure range of 2.5-5.0 MPa. This study provides the potential of hydrate process to separate the CO2 gas from CO2-H-2 (40:60) mixture gas in IGCC process without significantly lowering the processing temperature. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
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