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Effect of distribution patterns of refractory overlayers on cyclic high temperature CO2 capture using waste oyster shell

机译：耐火覆层对循环高温二氧化碳捕获的耐火覆盖物分布模式的影响

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摘要

Waste oyster shell powder has been applied in cyclic high temperature CO2 capture, but the sintering effect during calcium looping (carbonation/calcination) significantly shortens the life span of the adsorbents. The association of waste oyster shell with refractory materials, such as zirconium oxide has been evaluated, using either furnace treatment or atmospheric pressure plasma treatment to improve the thermal stability. It was noted that samples with 5 wt% of ZrO2, by either furnace treatment or plasma treatment, exhibited the highest CO2 capture capacity (similar to 360 mol-CO2 per mol-CaO in 20 calcium looping cycles). The plasma treatment was found to quite effectively enhance the thermal stability when more ZrO2 was added; however, evaporation-condensation reactions during plasma treatment led to evenly distributed CaZrO3 particles, which hindered the access of CO2 to CaO, and therefore reduced the overall CO2 capture capacity. In contrast, furnace treatment leads to most of the ZrO2 functioning as wedges to mitigate the sintering effect, which essentially exposes more CaO for CO2 access and accounts for its high overall CO2 capture capacity. Accordingly, the distribution patterns of refractory overlayers on waste oyster shell play an important role in cyclic high temperature CO2 capture.
机译：废弃物牡蛎壳粉末已应用于循环高温CO2捕获，但钙循环（碳化/煅烧）期间的烧结效果显着缩短了吸附剂的寿命。废牡蛎壳与耐火材料的关联，例如氧化锆等氧化锆，使用炉治疗或大气压等离子体处理来改善热稳定性。有人指出，通过熔炉处理或等离子体处理具有5wt％的ZrO 2的样品，表现出最高的CO 2捕获能力（与20钙循环循环中的360mol-Co2类似）。发现等离子体处理在加入更多ZrO 2时，非常有效地提高了热稳定性;然而，在等离子体处理期间蒸发 - 缩合反应导致均匀分布的Cazro3颗粒，其阻碍了CO2至CaO的进入，因此降低了整体CO 2捕获能力。相比之下，炉子处理导致作为楔形的大部分ZrO2，以减轻烧结效果，这基本上暴露了CO2的CO2接入并考虑其高总体二氧化碳捕获容量。因此，废牡蛎壳上的耐火覆盖层的分布图案在循环高温CO2捕获中起重要作用。

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  • 来源
    《RSC Advances》 |2016年第100期|共10页
  • 作者

    Qin Kun; Wang TsingHai; Huang Jin-Chiang; Huang Chih-Hung; Hsieh Yi-Kong; Wang Chu-Fang; Tan Chung-Sung;

  • 作者单位

    Taishan Med Univ Coll Chem &

    Pharmaceut Engn Tai An Shandong Peoples R China;

    Natl Tsing Hua Univ Biomed Engn &

    Environm Sci Hsinchu Taiwan;

    Natl Tsing Hua Univ Biomed Engn &

    Environm Sci Hsinchu Taiwan;

    Natl Tsing Hua Univ Biomed Engn &

    Environm Sci Hsinchu Taiwan;

    Natl Tsing Hua Univ Dept Chem Engn Hsinchu Taiwan;

    Natl Tsing Hua Univ Biomed Engn &

    Environm Sci Hsinchu Taiwan;

    Natl Tsing Hua Univ Dept Chem Engn Hsinchu Taiwan;

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  • 正文语种 eng
  • 中图分类 化学;
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