THF-SDS对矿井瓦斯水合分离影响研究  

The Effect of THF-SDS on Separation of Methane-Hydrate from Mine Gas

作　　者：吴强[1] 张保勇[1] 

机构地区：[1]黑龙江科技学院安全工程学院,黑龙江哈尔滨150027

出　　处：《中国矿业大学学报》2010年第4期484-489,共6页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(50904026;50874040);黑龙江省自然科学基金项目(B2007-10);哈尔滨市科技创新人才研究专项资金项目(2008RFQXG111)

摘　　要：基于瓦斯水合分离实验,研究了3种THF-SDS复配体系(THF,0.50mol/L,SDS,0.20,0.35和0.50mol/L)对3种合成瓦斯气样(Ⅰ型、Ⅱ型和Ⅲ型)水合分离过程影响,并对THF-SDS复配体系的促进机理进行了初步分析.结果表明:在THF-SDS复配溶液中,φ(CH4)分别为24.90%,40.40%和59.80%的气样经过一级水合分离后,φ(CH4)分别提高13.81%,15.63%和20.04%;THF-SDS复配体系可以改善瓦斯水合分离热力学条件,有效缩短瓦斯水合物生成的诱导时间,随着复配体系中SDS浓度的升高,诱导时间逐渐缩短;然而随着THF-SDS复配体系中SDS浓度的增加,水合物中瓦斯气体含量减少,分离效果变差,高浓度的SDS对CH4-N2-O2-THF-H2O体系水合物晶体生长过程有一定抑制作用.The separation of methane-hydrate from mine gas is promoted by the addition of THF-SDS to the separation mixture.Three different samples of mine gas （types Ⅰ,Ⅱ and Ⅲ） were tested with three different THF-SDS binary solutions （THF 0.50 mol/L;SDS 0.20,0.35 or 0.50 mol/L）.A preliminary explanation of the promotion mechanism has been postulated.The amount of CH_4 separated from the three mine gas samples in one stage of separation was increased by 13.81%,15.63% or 20.04% for gas types Ⅰ,Ⅱ or Ⅲ respectively.The THF-SDS mixture improves the thermodynamics for gas-hydrate separation and shortens the observed induction time.As the SDS concentration was increased the gas content in the hydrate dropped,which indicates poorer separation and an inhibition at higher SDS concentrations.

关 键 词：矿井瓦斯 水合物 分离 THF SDS 

分 类 号：TD713[矿业工程—矿井通风与安全]