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CO_2 sequestration from coal fired power plants

机译：燃煤电厂的二氧化碳封存

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摘要

The paper takes into consideration a new approach for CO_2 capture and transport, based on the formation of solid CO_2 hydrates.rnCarbon dioxide sequestration from power plants can take advantage of the properties of gas hydrates. The formation and decomposition of hydrates from various N_2-CO_2 mixtures has been studied experimentally in a 2 1 reactor, to determine the CO_2 separation in terms of hydrate composition and residual CO_2 content in the reacted gas.rnCarbon dioxide acts as a co-former for the production of hydrates containing nitrogen, besides CO_2. The mixed hydrates that are obtained are less stable than simple CO_2 hydrates. When CO_2 content in the flue gas is higher than 30% by volume, the hydrates formed at 5 MPa are sufficiently concentrated (about 70% CO_2) and carbon dioxide reduction in the reacted gas is acceptable.rnThe application of a process based on hydrate formation could be especially interesting (for CO_2 capture and transport) when connected to an oxy-coal combustion process; in this case the CO_2 content in the flue gas is very high and the hydrate formation is greatly facilitated.
机译：本文考虑了以固体CO_2水合物的形成为基础的CO_2捕集和运输的新方法。发电厂的二氧化碳隔离可以利用天然气水合物的特性。已经在2 1反应器中对各种N_2-CO_2混合物中水合物的形成和分解进行了实验研究，以确定水合物组成和反应气体中残留的CO_2含量来确定CO_2的分离。除了CO_2，还生产含氮的水合物。所获得的混合水合物的稳定性低于简单的CO_2水合物。当烟道气中的CO_2含量高于30％（体积）时，在5 MPa时形成的水合物会充分浓缩（约70％CO_2），并且反应气体中的二氧化碳减少是可以接受的。当连接到氧气-煤燃烧过程时，可能会特别有趣（对于CO_2的捕获和运输）；在这种情况下，烟道气中的CO_2含量很高，并且大大促进了水合物的形成。

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  • 来源
    《Fuel》 |2010年第3期|623-628|共6页
  • 作者

    Carlo Giavarini; Filippo Maccioni; Maria Laura Santarelli;

  • 作者单位

    Chemical Engineering Department, University of Rome 'La Sapienza', Via Eudossiana 18, 00184 Rome, Italy;

    Chemical Engineering Department, University of Rome 'La Sapienza', Via Eudossiana 18, 00184 Rome, Italy;

    Chemical Engineering Department, University of Rome 'La Sapienza', Via Eudossiana 18, 00184 Rome, Italy;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    carbon dioxide; hydrates; sequestration; oxy-coal;

    机译：二氧化碳;水合物;隔离氧煤;

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