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Influence and limitations of cation exchange processes of organic cations with different valence under geothermal boundary conditions - GEOCAT

地热边界条件下不同价态有机阳离子交换过程的影响与限制 - GEOCAT

基本信息

批准号：
238193764
负责人：
Professor Dr. Tobias Licha
金额：
--
依托单位：
Institut für Geologie, Mineralogie und Geophysik
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2013
资助国家：
德国
起止时间：
2012-12-31 至 2016-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/238193764?language=en
关键词：
Influence limitations cation exchange processes

项目摘要

The proposed work shall contribute to the further understanding of the sorption processes of organic cations by conducting systematic investigations. The main focus is on the mechanismn of the underlying cation exchange processes and their dependences from selected boundary conditions. Especially, the role of competing inorganic cations and temperature on the exchange equilibrium shall be investigated. Furthermore, the planned work shall provide information on the maximum (geothermal) temperatures and maximum concentrations of competing inorganic cations (ionic strength) where cation exchange stays a relevant transport process.For this purpose, the sorption of five selected and defined organic cations onto a Northern German reservoir rock material shall be investigated experimentally and compared by varying relevant boundary conditions (ionic strength, ion type, temperature). On the on hand, the competition of organic cations with the inorganic cations Na+ and Ca2+ for the available exchange sites shall be studied intensively. On the other hand, the possible temperature dependence of the cation exchange of organic cations shall be tested and quantified. The characterization of the sorption behaviour will be carried out in column experiments with controlled boundary conditions.

通过系统的研究，将有助于进一步了解有机阳离子的吸附过程。主要的焦点是在基本的阳离子交换过程和它们的依赖性从选定的边界条件的mechanismn。特别是，应研究竞争无机阳离子和温度对交换平衡的作用。此外，计划的工作应提供关于（地热）温度和竞争无机阳离子的最大浓度（离子强度），其中阳离子交换是一个相关的传输过程。为此，应通过改变相关的边界条件，对五种选定和确定的有机阳离子在德国北方储集岩材料上的吸附进行实验研究和比较（离子强度、离子类型、温度）。另一方面，有机阳离子与无机阳离子Na+和Ca 2+对有效交换位点的竞争应深入研究。另一方面，应测试和量化有机阳离子的阳离子交换的可能的温度依赖性。吸附行为的表征将在具有受控边界条件的柱实验中进行。