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首页> 外文期刊>Environmental Science & Technology >CO_2/CH_4 Competitive Adsorption in Shale: Implications for Enhancement in Gas Production and Reduction in Carbon Emissions
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CO_2/CH_4 Competitive Adsorption in Shale: Implications for Enhancement in Gas Production and Reduction in Carbon Emissions

机译：SALE中的CO_2 / CH_4竞争吸附：对天然气生产增强的影响和碳排放减少

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摘要

CO2/CH(4)interaction determines the prospects for complementary enhanced gas recovery (EGR) associated with CO2 sequestration in shale. We characterize the competitive adsorption of CO2 and CH4 in shale using low-field NMR. Competitive sorption of CO2 relative to CH4 is defined as the CO2/CH4 competitive adsorption ratio (CO2/CH4 CAR for short) when CO2 and CH4 have the same original partial pressure in shale. Results indicate the CO2/CH4 CAR decreases with the logarithm of increasing pressure. Observed CO2/CH4 CARS are on the order of 4.28-5.81 (YDN-1) to 3.43-5.57 (YDN-2), describing the remarkable competitive advantage of CO2 sorption relative to CH4 for shale. Results also indicate that increasing the CO2/CH(4 )pressure ratio (1) increases the adsorption capacity of shales to CO2 and decreases that to CH4 logarithmically with pressure, and (2) boostsCO(2)-CH4 displacement and generates greater EGR efficiency in shale, where the EGR efficiency can be inferred by the CO2/CH4 pressure ratio using a Langmuir-like function. Furthermore, the maximum sequestration capacity of adsorbed CO2 during CO2-CH4 competition is on the order of similar to 3.87 cm(3)/g (YDN-1) to similar to 5.13 cm(3)/g (YDN-2). These promising results for EGR and CO2 storage reveal the considerable potential for carbon capture and geological sequestration in shale.
机译：CO2 / CH（4）相互作用决定了页岩中CO2封存相关的互补增强型气体回收（EGR）的前景。我们使用低场NMR表征SALE中CO2和CH4的竞争吸附。当CO 2和CH4在页岩中具有相同的原始部分压力时，CO 2相对于CH4的CO 2相对于CH4的竞争吸附定义为CO 2 / CH 4竞争吸附率（CO 2 / CH4轿厢）。结果表明，CO2 / CH4汽车随着越来越大的对数而降低。观察到的CO2 / CH4赛车的阶数为4.28-5.81（YDN-1）至3.43-5.57（YDN-2），描述了CO2吸附相对于页岩的CH4的显着竞争优势。结果还表明，增加CO2 / CH（4）的压力比（1）增加了Shales对CO2的吸附能力，并用压力对数上的CH4降低，（2）-CH4位移并产生更大的EGR效率在页岩中，可以通过使用Langmuir样功能通过CO 2 / CH4压力比推断出EGR效率。此外，CO 2 -CH4竞争期间吸附的CO 2的最大螯合能力为类似于3.87cm（3）/ g（YDN-1）的顺序，相似至5.13cm（3）/ g（YDN-2）。 EGR和CO2储存的这些有希望的结果揭示了页岩中碳捕获和地质隔离的相当大的潜力。

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  • 来源
    《Environmental Science & Technology》 |2019年第15期|9328-9336|共9页
  • 作者

    Liu Jun; Xie Lingzhi; Elsworth Derek; Gan Quan;

  • 作者单位

    Sichuan Univ Inst New Energy & Low Carbon Technol Minist Educ Key Lab Deep Underground Sci & Engn Chengdu 610065 Sichuan Peoples R China|Sichuan Univ Inst New Energy & Low Carbon Technol 24 South Sect 1 Yihuan Rd Chengdu 610065 Sichuan Peoples R China;

    Sichuan Univ Inst New Energy & Low Carbon Technol Minist Educ Key Lab Deep Underground Sci & Engn Chengdu 610065 Sichuan Peoples R China;

    Penn State Univ Dept Energy & Mineral Engn University Pk PA 16802 USA;

    Univ Aberdeen Sch Geosci Dept Petr Geol & Geol Aberdeen AB24 3UE Scotland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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