Experimental study of separation of ammonia synthesis vent gas by hydrate formation  

作　　者：Dong Taibin Wang Leiyan Liu Aixian Guo Xuqiang Ma Qinglan Li Guowen Sun Qiang 

机构地区：[1]State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China

出　　处：《Petroleum Science》2009年第2期188-193,共6页石油科学（英文版）

基　　金：support received from the National Natural Science Foundation of China (20476058, 20676146);Ministry of Science and Technology of China (2006AA09A208, 2009CB219504);Specialized Research Fund for the Doctoral Program of Higher Education (20070425001) aregratefully acknowledged

摘　　要：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 %.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 %.

关 键 词：CH4 hydrate AMMONIA THF THERMODYNAMICS SEPARATION 

分 类 号：TE642[石油与天然气工程—油气加工工程] TQ226.37[化学工程—有机化工]