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Carbon Dioxide Sorption Capacities of Coal Gasification Residues

机译:煤气化残渣的二氧化碳吸收能力

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摘要

Underground coal gasification is currently being considered as an economically and environmentally sustainable option for development and utilization of coal deposits not mineable by conventional methods. This emerging technology in combination with carbon capture and sorptive CO_2 storage on the residual coke as well as free-gas CO_2 storage in the cavities generated in the coal seams after gasification could provide a relevant contribution to the development of Clean Coal Technologies. Three hard coals of different rank from German mining districts were gasified in a laboratory-scale reactor (200 g of coal at 800 °C subjected to 10 L/min air for 200 min). High-pressure CO_2 excess sorption isotherms determined before and after gasification revealed an increase of sorption capacity by up to 42%. Thus, physical sorption represents a feasible option for CO_2 storage in underground gasification cavities.
机译:目前,地下煤气化被认为是开发和利用传统方法无法开采的煤层的经济和环境可持续选择。这项新兴技术与碳捕获和残留焦炭上的吸附性CO_2储存以及气化后煤层中生成的腔体中的游离气CO_2储存相结合,可以为清洁煤技术的发展做出重要贡献。在实验室规模的反应器中将三种来自德国矿区的不同等级的硬煤气化(200 g的煤在800°C的温度下以10 L / min的空气进行200 min)。气化前后确定的高压CO_2过量吸附等温线显示吸附能力最多增加42%。因此,物理吸附是将CO_2储存在地下气化腔中的可行选择。

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  • 来源
    《Environmental Science & Technology》 |2011年第4期|p.1719-1723|共5页
  • 作者单位

    German Research Centre for Geosciences (GFZ), Helmholtz Centre Potsdam, Telegrafenberg,14473 Potsdam, Germany;

    Department of Engineering Geology and Hydrogeology, RWTH Aachen University, Lochnerstrasse 4-20, 52064 Aachen, Germany;

    Institute of Geology and Geochemistry of Petroleum and Coal, RWTH Aachen University, Lochnerstrasse 4-20,52064 Aachen, Germany,Projects and Technology, Kessler Park 1, 2288 GS Rijswijk, The Netherlands;

    Unit of Technology of Fuels, RWTH Aachen University, Wullnerstrasse 2, 52056 Aachen, Germany;

    DMT GmbH & Co. KG, Am Technologiepark 1, 45307 Essen, Germany;

    Institute of Geology and Geochemistry of Petroleum and Coal, RWTH Aachen University, Lochnerstrasse 4-20,52064 Aachen, Germany;

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  • 正文语种 eng
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