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含添加剂水合物分解热的确定

发表时间:2011-03-31  浏览量:1378  下载量:640
全部作者: 孙志高,刘成刚,周波,黄海峰,徐乐中
作者单位: 苏州科技学院环境科学与工程学院
摘 要: 利用可视化高压流体测试装置测量合成天然气(甲烷、乙烷和丙烷的混合物)在含水乙二醇中水合物的形成条件,实验结果表明:温度越高,水合物形成压力越高,而且在某一特定温度随着乙二醇含量的增加,水合物的形成压力增大。利用水合物相平衡测试数据根据Clausius-Clapeyron方程计算含添加剂水合物的分解热,结果表明:水合物分解热随着乙二醇含量的增加而减小。其原因是随着乙二醇浓度的增大,水合物的相平衡线(P-T)变陡;而且在某一确定的温度点(273.15 K),水合物相平衡压力随着乙二醇浓度的增大而增大,导致该条件下气体的压缩因子变小。
关 键 词: 化学能源;水合物;分解热;乙二醇
Title: Determination of dissociation heat of hydrates with additives
Author: SUN Zhigao, LIU Chenggang, ZHOU Bo, HUANG Haifeng, XU Lezhong
Organization: School of Environmental Science and Engineering, Suzhou University of Science and Technology
Abstract: A set of visible high-pressure fluid measurement system is used to measure hydrate formation conditions of synthetic natural gas (mixture of methane, ethane and propane) in aqueous solutions. The experimental results show that higher temperature, higher equilibrium pressure, and hydrate equilibrium pressure increase with the increase of ethylene glycol at the same temperature. The dissociation heat of hydrates with additives is calculated using Clausius-Clapeyron equation based on the hydrates formation conditions. The results show that hydrate dissociation heat reduces with the increase of ethylene glycol. There are two factors for the result: one is hydrate phase equilibrium line (P-T) becomes steeper with the concentration increase of ethylene glycol, and the other is compressor factor of gas becomes smaller with the concentration increase of ethylene glycol.
Key words: chemical energy source; hydrate; dissociation heat; ethylene glycol
发表期数: 2011年3月第6期
引用格式: 孙志高,刘成刚,周波,等. 含添加剂水合物分解热的确定[J]. 中国科技论文在线精品论文,2011,4(6):493-495.
 
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