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首页> 外文期刊>Energy & fuels >K_2CO_3/Al_2O_3 for Capturing CO_2 in Flue Gas from Power Plants. Part 3: CO_2 Capture Behaviors of K_2CO_3/Al_2O_3 in a Bubbling Fluidized-Bed Reactor
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K_2CO_3/Al_2O_3 for Capturing CO_2 in Flue Gas from Power Plants. Part 3: CO_2 Capture Behaviors of K_2CO_3/Al_2O_3 in a Bubbling Fluidized-Bed Reactor

机译：K_2CO_3 / Al_2O_3用于捕获发电厂烟气中的CO_2。第3部分：鼓泡流化床反应器中K_2CO_3 / Al_2O_3的CO_2捕获行为

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摘要

K_2CO_3/Al_2O_3 used for capturing CO_2 in flue gas is thoroughly investigated. The present paper focuses on the CO_2 capture behaviors of K_2CO_3/Al_2O_3 in a bubbling fluidized-bed reactor. It is found that K_2CO_3/Al_2O_3 shows a higher CO_2 capture capacity than other potassium-based sorbents. The carbonation reaction capacities are in the range of 290-319 mg of CO_2/g of K_2CO_3 for K_2CO_3/Al_2O_3 with loading amounts of 12.8-36.8%. It is abruptly decreased to 148.98 mg of CO_2/g of K_2CO_3 when the loading amount of K_2CO_3 increases to 45.1%. The reason is attributed to the change of the active component distribution behavior. The total CO_2 sorption capacity maintains a high level when the carbonation temperature is in the range of 60-80 ℃. The CO_2 capture behavior is significantly affected by the changing H_2O concentration and the process of water pretreatment for the sorbent. The effect of the CO_2 concentration is not significant on the carbonation conversion when it is in the range of 10-30%. The sorbent is completely regenerated when the final temperature is higher than 300 ℃ in a slow heating process, and the temperature for 100% regeneration of the sorbent is 350 ℃ in a rapid heating process. The carbonation conversion of K_2CO_3/Al_2O_3 decreases from 91 to 79.6% after 80 cycles. The surface area and pore volume of the sorbent keep a stable value, and the pore size distribution behavior is not changed after 80 cycles.
机译：考察了用于捕集烟气中CO_2的K_2CO_3 / Al_2O_3。本文重点研究了鼓泡流化床反应器中K_2CO_3 / Al_2O_3的CO_2捕获行为。发现K_2CO_3 / Al_2O_3比其他钾基吸附剂具有更高的CO_2捕集能力。对于K_2CO_3 / Al_2O_3，碳酸化反应能力在290-319mg CO_2 / g K_2CO_3的范围内，负载量为12.8-36.8％。当K_2CO_3的负载量增加到45.1％时，它突然减少到148.98 mg CO_2 / g K_2CO_3。原因归因于活性成分分布行为的变化。当碳酸化温度在60-80℃范围内时，总的CO_2吸附能力保持较高水平。不断变化的H_2O浓度和吸附剂的水预处理过程对CO_2的捕获行为有显着影响。当CO 2浓度在10-30％的范围内时，对碳酸化转化率的影响不显着。在最终温度高于300℃的缓慢加热过程中，吸附剂会完全再生，而在快速加热过程中100％再生的吸附剂的温度为350℃。 80个循环后，K_2CO_3 / Al_2O_3的碳酸化转化率从91降低至79.6％。吸附剂的表面积和孔体积保持稳定值，并且在80个循环后孔尺寸分布行为没有改变。

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  • 来源
    《Energy & fuels》 |2012年第mayajuna期|p.3062-3068|共7页
  • 作者

    Chuanwen Zhao; Xiaoping Chen; Changsui Zhao; Ye Wu; Wei Dong;

  • 作者单位

    School of Energy and Environment, Southeast University, Nanjing 210096, People's Republic of China;

    School of Energy and Environment, Southeast University, Nanjing 210096, People's Republic of China;

    School of Energy and Environment, Southeast University, Nanjing 210096, People's Republic of China;

    School of Energy and Environment, Southeast University, Nanjing 210096, People's Republic of China;

    School of Energy and Environment, Southeast University, Nanjing 210096, People's Republic of China;

  • 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);
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