姜仁霞,于洪观

• 1:山东科技大学化学与生物工程学院

摘要(Abstract)：

二氧化碳地质封存是2060年实现“碳中和”的有效手段，深部不可采煤层碳封存是一种很有前景的地质封存方法。本文提出了有关深部煤层CO_2封存等科学问题，包括煤对CO_2吸附、超临界CO_2(Sc-CO_2)与煤的相互作用、矿物质在Sc-CO_2水溶液中的溶解性、CO_2热力学参数、CO_2与煤相互作用对流体的运移影响；分析指出CO_2吸附量测定技术、状态方程、实验条件和煤膨胀可导致煤的Sc-CO_2吸附等温线的单峰、双峰、负吸附和较差的重复性和再现性；CO_2的密度随温度及压力的变化特性和焦尔-汤姆逊效应是影响CO_2与煤相互作用定量测定的障碍，CO_2较高的焦尔-汤姆逊系数可造成CO_2注入时的“冰塞”工程问题；指出Sc-CO_2所引起的煤膨胀和塑性化、抽提出的的小分子化合物和酸性碳酸水溶解的矿物质会影响深部煤层的流体运移，该影响受煤层自由空间限制。

关键词(KeyWords)： 深部煤层气;碳中和;超临界CO_2;增收;封存

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目（51174127）;; 山东省自然科学基金项目（ZR2011DM005）

作者(Author): 姜仁霞,于洪观

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