Calorimetric and Densimetric Data to Help the Simulation of the Impact of Annex Gases Co-Injected with CO2 During Its Geological Storage

F. D. L. Mozos, K. Ballerat-Busserolles, Bárbara Libório, N. Nénot, J. Coxam, Yohann Coulier
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Abstract

Most of the industrialized countries have started to significantly reduce their greenhouse gases emissions. CO 2 capture and geological storage processes entered an operational phase with the emergence of several pilot-sites where different technologies are tested. The gas mixture composition to be stored can vary considerably both qualitatively and quantitatively, based on the origin of CO 2 , the chosen process of capture and the concerned industrial sector. Indeed, in addition to CO 2 , several components can be present at various concentration levels, including O 2 , N 2 , SO x , H 2 S, N y O x , that are a concern to the energy industry. These impurities can have an impact on the chemical reactivity with water, reservoir or cap-rock forming minerals, and the materials constituting injection or monitoring wells installed in a repository site. Moreover, some impurities (SO x , H 2 S, N y O x , CO) are toxic for human health and the environment, even at low concentrations. This work is part of the objectives of the French ANR program SIGARRR : Simulation of the Impact of Annex Gases (SO x , N y O x , O 2 ) co-injected with CO 2 during its geological storage on the Reservoir-Rocks Reactivity. Based on the technical experience of the consortium, it was appropriate to propose a project to study the behavior of co-injected gases mixtures under storage conditions. This chapter will focus on the determination of two key properties for the mixtures containing pure gases: Enthalpies of mixing, solubility, and Molar volumes at infinite dilution of aqueous solutions of salts, loaded with different gases, namely CO 2 and SO 2 .
用量热和密度数据模拟附件气体在地质储存过程中与二氧化碳共注入的影响
大多数工业化国家已开始大幅减少温室气体排放。随着几个试验点的出现,二氧化碳捕获和地质储存过程进入了操作阶段,在这些试验点测试了不同的技术。根据二氧化碳的来源、所选择的捕获过程和有关的工业部门,要储存的气体混合物组成在质量和数量上都有很大的不同。事实上,除了二氧化碳之外,还有几种成分可以以不同的浓度水平存在,包括o2、n2、SO x、h2s、ny O x,这些都是能源工业关注的问题。这些杂质会影响与水、储层或盖层形成矿物的化学反应性,以及构成安装在储存库地点的注入井或监测井的材料。此外,一些杂质(二氧化硫、硫化氢、一氧化氮、一氧化碳)即使浓度很低,对人体健康和环境也是有毒的。这项工作是法国ANR计划SIGARRR目标的一部分:模拟在地质储存期间与CO 2共注入的附件气体(SO x, N y O x, o2)对储层-岩石反应性的影响。根据该联合体的技术经验,提出一个研究共注入气体混合物在储存条件下的行为的项目是合适的。本章将重点讨论纯气体混合物的两个关键性质的测定:混合焓、溶解度和盐的水溶液在无限稀释时的摩尔体积,这些溶液含有不同的气体,即co2和so2。
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