Experimental study of separation of ammonia synthesis vent gas by hydrate formation |
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Authors: | Dong Taibin Wang Leiyan Liu Aixian Guo Xuqiang Ma Qinglan Li Guowen and Sun Qiang |
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Affiliation: | State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China |
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Abstract: | Termodynamic data on methane hydrate formation in the presence of ammonia are very important for upgrading of ammonia synthesis
vent gas using hydrate formation. This paper is focused on the formation conditions of methane hydrate in the presence of
ammonia and the effects of gas-liquid ratio and temperature on the separation of vent gas by hydrate formation. Equilibrium
data for methane hydrate within an ammonia mole concentration range from 1% to 5 % were obtained. The experimental results
indicated that ammonia has an inhibitive effect on hydrate formation. The higher the ammonia concentration, the higher is
the pressure reguired for methane hydrate formation would be. The primary experimental results showed that when volume ratio
of gas to liquid was 80:1 and temperature was 283.15 K, total mole fraction of (H2+N2) in gas phase could reach 96.9 %. |
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Keywords: | CH4 hydrate ammonia THF thermodynamics separation |
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