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《Science Technology and Engineering》 2014-17
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Study on Hydrates Equilibrium for Nitrogen and Nitrogen + Carbon Dioxide in Aqueous Solutions of Tetra-n-butyl Ammonium Bromide

SUN Zhi-gao;JIAO Li-jun;WANG Gong-liang;ZHAO Zhi-gui;HUANG Hai-feng;LIU Cheng-gang;School of Environmental Science and Engineering,Suzhou University of Science and Technology;  
Hydrate phase equilibrium data for tetra-n-butyl ammonium bromide( TBAB)-nitrogen-water and TBAB-nitrogen-carbon dioxide-water mixtures were experimentally studied and reported in the temperature range of283. 25 ~ 288. 65 K,the pressure range of 1. 98 ~ 5. 89 MPa,and the TBAB concentration range of 10 ~ 30 mass% using pressure search method. The experimental results showed that the presence of TBAB decreased the formation pressure of nitrogen and nitrogen + carbon dioxide hydrate at the experimental range. The pressure reduction increased with the increase of the concentration of TBAB. It presented that TBAB was a good promoter for nitrogen and nitrogen + carbon dioxide hydrate formation. The experimental results also indicated that hydrate equilibrium pressure reduced when carbon dioxide was added into nitrogen. Moreover,pressure reduction was dependent on the carbon dioxide concentration. Nitrogen hydrate was more stable with the increase of the concentration of carbon dioxide in mixed gas.
【Fund】: 江苏省自然科学基金项目(BK2012602);; 苏州市科技计划项目(SYG201042)资助
【CateGory Index】: X511
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