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In situ CO_2-coal reactions in view of carbon dioxide storage in deep unminable coal seams

机译：考虑到深部不可开采煤层中二氧化碳的储存，原位CO_2-煤反应

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Injection of CO_2 in coalbed is considered to be an attractive option for storage. Large amounts of carbon dioxide are generated during the burial history of coal. In commercially produced coalbed gas, however, only small amounts of CO_2 are found. This has motivated the present investigation of the long-term stability of sequestered CO_2 in coal seams. Thus, the purpose of this study is to examine whether reactions with carbon dioxide can occur in coal at reservoir temperatures. The question is whether a relatively small decomposition of CO_2 to form CO can become significant in periods of 10,000 years. High pressure high temperature static and dynamic experiments with CO_2 and coal were performed, which led to the opinion that chemical reactions involving CO_2 cannot be ruled out. All CO concentrations from CO_2 dynamic pressure experiments appear elevated compared to the nitrogen dynamic pressure experiment. The experiments do strongly point towards the reactivity of CO_2 to form CO but because of limited experimental data the chemical involvement cannot be articulated in detail.
机译：在煤层中注入CO_2被认为是一种有吸引力的存储方法。在煤炭埋葬期间会产生大量的二氧化碳。但是，在商业生产的煤层气中，仅发现少量的CO_2。这激发了目前对煤层中固存CO_2的长期稳定性的研究。因此，本研究的目的是检验在储层温度下煤中是否会发生与二氧化碳的反应。问题是在10,000年的时间内，相对较小的CO_2分解形成CO是否会变得很重要。进行了CO_2和煤的高压高温静态和动态实验，导致不能排除涉及CO_2的化学反应。与氮气动压实验相比，来自CO_2动压实验的所有CO浓度均升高。实验确实指向了CO_2形成CO的反应性，但是由于有限的实验数据，无法详细阐明化学作用。

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