<blockquote id="pl83f"><p id="pl83f"></p></blockquote>
<s id="pl83f"><li id="pl83f"></li></s>

      
      
      <sub id="pl83f"><rt id="pl83f"></rt></sub>

        <blockquote id="pl83f"><p id="pl83f"></p></blockquote>
        <sub id="pl83f"><rt id="pl83f"></rt></sub>
        女人的天堂av在线播放,3d动漫精品一区二区三区,伦精品一区二区三区视频,国产成人av在线影院无毒,亚洲成av人片天堂网老年人,最新国产精品剧情在线ss,视频一区无码中出在线,无码国产精品久久一区免费

        Chinese scientists find carbon dioxide can be stored in deep-sea sediments

        Source: Xinhua| 2018-07-05 04:38:32|Editor: Chengcheng
        Video PlayerClose

        WASHINGTON, July 4 (Xinhua) -- Chinese researchers found that carbon dioxide can be stored in deep-sea sediments stably and safely.

        The study, published on Wednesday in the journal Science Advances, revealed that the negative buoyancy effect caused by high density of liquid carbon dioxide, along with the formation of carbon dioxide hydrate, could provide an effective barrier to prevent the upward flow of the injected carbon dioxide.

        Carbon capture and storage is considered to be a promising option to stabilize the atmospheric concentration of human-caused carbon dioxide and mitigate climate change.

        Although conventional proposals for geologic sequestration, including injection into deep saline aquifers, oil and gas fields, and deep coal seams are prospective, the stored carbon dioxide is so buoyant that it may escape from permeable pathways into the atmosphere, according to the study.

        Carbon sequestration in deep-sea sediments could take advantage of the high pressure and low temperature of subsea sediments, according to the study.

        The paper's senior author Zhang Dongxiao, a professor at Peking Univeristy, told Xinhua, the required infrastructure of this option is similar to that used in the recent pilot of natural gas hydrate extraction in the South China Sea.

        "Compared with previous studies, the superiority of our study is the incorporation of the dynamics of dissolved components and their corresponding effects on hydrate reaction and fluid flow," said the paper's first author Teng Yihua who worked at Zhang's team.

        "This allows us to study the long-term evolution of different phases and components," said Teng. "Consequently, we are able to predict the long-term changes of the injected carbon dioxide, which is not possible in previous studies."

        According to Teng, if the buoyancy-driven upward flow is too fast, the injected carbon dioxide may not be sufficiently cooled down, which means that hydrate may not form even if carbon plume enter the hydrate formation zone in static condition.

        Whether carbon dioxide would escape or be trapped depended on the interaction of the competing processes of buoyant flow, hydrate formation, and density increase of carbon dioxide induced by heat loss, Teng said.

        The study showed that the low buoyancy and the formation of hydrate could effectively trap the injected carbon dioxide in a cage-like system and the injected carbon dioxide would finally dissolve and migrate away through diffusion in the long term, thus leading to permanent storage.

        "We are very excited about the results, because it proves that this option is long-term viable and certainly would be an alternative of terrestrial sequestration," said Teng.

        TOP STORIES
        EDITOR’S CHOICE
        MOST VIEWED
        EXPLORE XINHUANET
        010020070750000000000000011100001373019451
        主站蜘蛛池模板: 日本欧美v大码在线| 鲁鲁网亚洲站内射污| 亚洲欧美日韩中文字幕在线不卡 | 性色欲情网站iwww| 国产亚洲一区二区三不卡| 精品人妻一区二区三区蜜臀| 人妻丝袜AV中文系列先锋影音| 亚洲国产精品人人做人人爱| 亚洲精品你懂的在线观看| 国产精品一二三区视在线| 在线观看国产一区亚洲bd| 国产色a在线观看| 人妻影音先锋啪啪AV资源| 天天摸夜夜添狠狠添高潮出水| 日韩乱码人妻无码中文字幕视频| 国产成人女人在线观看| 亚洲成av人片无码不卡播放器| 亚洲AV无码综合一区二区在线| 办公室强奷漂亮少妇视频| 国产精品女在线观看| 日日夜夜噜噜视频| 人成午夜大片免费视频77777| 日本一区二区三区18岁| 久久精品国产亚洲夜色AV网站| 亚洲a免费| 国产jlzzjlzz视频免费看| 亚洲情色av一区二区| 亚洲最大福利视频网| 亚洲成亚洲成网| 天天躁夜夜躁狠狠喷水| 国产黄色免费看| 最新国产精品剧情在线ss| 国产一区日韩二区三区| 电影在线观看+伦理片| 女人脱裤子让男生桶爽视频| 美女人妻激情乱人伦| 狠狠色噜噜狠狠狠狠7777米奇| 国产福利深夜在线播放| 国产精品中文第一字幕| 国产在线精品欧美日韩电影| 中文 在线 日韩 亚洲 欧美|