瓦斯水合物相平衡测定及分解热计算

发布时间：2018-05-28 16:42

本文选题：矿井瓦斯 + 瓦斯水合物　；参考：《中国矿业大学学报》2017年04期

【摘要】：为探究瓦斯水合物相平衡条件及其分解热特征,利用瓦斯水合物相平衡实验装置结合图形法研究了CH_4—N_2—O_2瓦斯混合气在纯水体系及TBAB(四丁基溴化铵,0.2mol/L)添加剂体系的水合物相平衡条件,将纯水体系下瓦斯水合物相平衡压强实验值与Chen-Guo模型计算值进行对比,基于Clausius-Clapeyron方程计算了瓦斯水合物分解热.结果表明:瓦斯水合物相平衡条件随着CH_4浓度的升高变得更加温和,TBAB可显著改善瓦斯水合物相平衡条件,使水合物相-气相边界向高温低压区域转移;相同温度下,2种瓦斯混合气在纯水体系生成水合物的相平衡压强实验值均低于Chen-Guo模型计算值,相对误差分别为0.18,0.23;水合物分解热随着瓦斯中CH_4浓度的升高而增大,TBAB体系瓦斯水合物分解热远大于纯水体系.
[Abstract]:In order to study the phase equilibrium conditions and decomposition heat characteristics of gas hydrate, The gas hydrate phase equilibrium conditions of CH_4-N_2-O_2 gas mixture in pure water system and TBA (Ding Ji ammonium bromide 0.2mol / L) additive system were studied by means of gas hydrate phase equilibrium apparatus and graphic method. The experimental values of gas hydrate phase equilibrium pressure in pure water system were compared with those calculated by Chen-Guo model. The decomposition heat of gas hydrate was calculated based on Clausius-Clapeyron equation. The results show that the gas hydrate phase equilibrium conditions become more mild with the increase of CH_4 concentration, which can significantly improve the gas hydrate phase equilibrium conditions and make the gas hydrate phase boundary transfer to the region of high temperature and low pressure. At the same temperature, the experimental values of phase equilibrium pressure for the formation of hydrates from two kinds of gas mixtures in pure water system are lower than those calculated by Chen-Guo model. The relative error is 0.18 ~ 0.23, and the decomposition heat of gas hydrate is much higher than that of pure water system with the increase of CH_4 concentration in gas system.
【作者单位】：黑龙江科技大学安全工程学院;瓦斯等烃气输运管网安全基础研究国家级专业中心实验室;黑龙江科技大学建筑工程学院;山西博大集团寿阳京鲁煤业有限责任公司;
【基金】：国家自然科学基金重点项目(51334005);国家自然科学基金项目(51274267) 黑龙江省普通高等学校青年学术骨干支持计划项目黑龙江省普通本科高等学校青年创新人才培养计划项目
【分类号】：TD712

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