Prediction of vapor-liquid-liquid-hydrate phase equilibrium for multicomponent systems containing tetrahydrofuran  被引量:2

Prediction of vapor-liquid-liquid-hydrate phase equilibrium for multicomponent systems containing tetrahydrofuran

在线阅读下载全文

作  者:MA QingLan CHEN GuangJin 

机构地区:[1]State Key Laboratory of Heavy Oil Processing [2]China University of Petroleum Beijing

出  处:《Science China Chemistry》2013年第12期1800-1810,共11页中国科学(化学英文版)

基  金:supports received from the National Natural Science Foundation of China(20925623,U1162205);National Basic Research Program of China(973 Project,2012CB215005)

摘  要:Numbers of hydrate-based new techniques require the algorithm to be able to perform multiphase flash calculation where one phase is a gas hydrate phase.Tetrahydrofuran(THF)is frequently used as a thermodynamic promoter in the development of hydrate-based technique,which can reduce the hydrate formation pressure,especially when methane or hydrogen exists.However,it is a hard work to describe accurately the phase behavior of THF-water system due to their polarities.It has been proved that the water-in-oil(W/O)emulsion can raise the hydrate formation rate and improve the single stage separation efficiency,and furthermore prevent the hydrate from agglomeration to plug the facilities.The goal of this work is to present an extension of our previous work to the prediction of the vapor-liquid-liquid-hydrate equilibrium of such complex systems.These include ternary and quaternary mixtures with W/O emulsion containing THF.The proposed algorithm of four phase equilibrium calculation is very simple due to avoiding the complexity of simultaneous solution of the sophisticated equation group.The calculation results were found to be in satisfactory agreement with the experimental data.Numbers of hydrate-based new techniques require the algorithm to be able to perform multiphase flash calculation where one phase is a gas hydrate phase. Tetrahydrofuran (THF) is frequently used as a thermodynamic promoter in the development of hydrate-based technique, which can reduce the hydrate formation pressure, especially when methane or hydrogen exists. However, it is a hard work to describe accurately the phase behavior of THF-water system due to their polarities. It has been proved that the water-in-oil (W/O) emulsion can raise the hydrate formation rate and improve the single stage separation effi- ciency, and furthermore prevent the hydrate from agglomeration to plug the facilities. The goal of this work is to present an extension of our previous work to the prediction of the vapor-liquid-liquid-hydrate equilibrium of such complex systems. These include ternary and quaternary mixtures with W/O emulsion containing THF. The proposed algorithm of four phase equilibrium calculation is very simple due to avoiding the complexity of simultaneous solution of the sophisticated equation group. The calculation results were found to be in satisfactory agreement with the experimental data.

关 键 词:gas hydrate muitiphase equilibrium EMULSION tetrahydrofuran (THF) 

分 类 号:TE642[石油与天然气工程—油气加工工程]

 

参考文献:

正在载入数据...

 

二级参考文献:

正在载入数据...

 

耦合文献:

正在载入数据...

 

引证文献:

正在载入数据...

 

二级引证文献:

正在载入数据...

 

同被引文献:

正在载入数据...

 

相关期刊文献:

正在载入数据...

相关的主题
相关的作者对象
相关的机构对象