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首页> 外文期刊>Environmental Science & Technology >Effect of Organic Matters on CO_2 Hydrate Formation in Ulleung Basin Sediment Suspensions
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Effect of Organic Matters on CO_2 Hydrate Formation in Ulleung Basin Sediment Suspensions

机译：有机质对Ulleung盆地沉积物悬浮液CO_2水合物形成的影响

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摘要

Marine sediment core samples collected from a gas hydrate deposit site (Ulleung Basin (UB), East Sea, Korea) were explored to identify the role of sediment organic matters (SOMs) on the formation of CO_2 hydrate. Two distinct CO_2 hydrate formation regimes (favorable (<40 min) and unfavorable (>2S0 min)) were observed from the hydrate formation tests. CO_2 hydrate induction time in UB sediment suspensions was approximately seven times faster than that in UB sediment suspensions without SOMs (baked UB), showing a direct influence of SOMs. Spectrometric and spectroscopic analyses confirmed the existence of different types of SOMs including nonhumic and humic substances in UB sediment samples. We found SOMs with aromatic ring structures in all sediment extracts and SOMs with amine and amide groups and lignin in alkaline extracts. SOMs were extracted from UB sediment core samples (1 g each). Measured CO_2 hydrate induction times were different in baked UB sediment suspensions with different extracts of UB sediments. The experimental results demonstrated that SOMs can play a significant role to accelerate the formation of CO_2 hydrate in UB sediment suspensions, suggesting that the gas hydrate deposit site at UB may be a proper place for CO_2 sequestration as a form of CO_2 hydrate.
机译：探索了从天然气水合物沉积点（Ulleung盆地（UB），韩国东海）收集的海洋沉积物核心样品，以确定沉积物有机物（SOMs）在CO_2水合物形成中的作用。从水合物形成测试中观察到两种不同的CO_2水合物形成机制（有利（<40分钟）和不利（> 2S0分钟））。 UB沉积物悬浮液中的CO_2水合物诱导时间比不含SOM（烘烤的UB）的UB沉积物悬浮液中的CO_2水合物诱导时间快约7倍，显示了SOM的直接影响。光谱和光谱分析证实了UB沉积物样品中存在不同类型的SOM，包括非腐殖质和腐殖质。我们在所有沉积物提取物中发现具有芳香环结构的SOM，在碱性提取物中发现具有胺和酰胺基以及木质素的SOM。从UB沉积物岩心样品（每个1 g）中提取SOM。在具有不同UB沉淀物提取物的烘烤UB沉淀物中，测得的CO_2水合物诱导时间不同。实验结果表明，SOMs在加速UB沉积物悬浮液中CO_2水合物的形成中起着重要作用，这表明UB处的天然气水合物沉积位点可能以CO_2水合物的形式适当地封存CO_2。

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  • 来源
    《Environmental Science & Technology》 |2011年第14期|p.6196-6203|共8页
  • 作者

    Rheo B. Lamorena; Daeseung Kyung; Woojin Lee;

  • 作者单位

    Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro,Yuseong-gu, Daejeon 305-701, Korea;

    Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro,Yuseong-gu, Daejeon 305-701, Korea;

    Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro,Yuseong-gu, Daejeon 305-701, Korea;

  • 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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