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Simultaneous NO/CO_2 removal performance of biochar/limestone in calcium looping process

机译：同时NO / CO_2 Biochar /石灰石在钙循环过程中的去除性能

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摘要

A novel simultaneous NO/CO2 removal system using biochar and calcined limestone in the calcium looping process was proposed. Coconut shell char and calcined limestone were added into a carbonator in the calcium looping process as the NO reductant and CO2 sorbent, respectively. The simultaneous NO/CO2 removal performance of coconut shell char/calcined limestone in the calcium looping process was investigated in a bubbling fluidized bed reactor. NO and CO2 in flue gases are effectively and simultaneously removed by coconut shell char/calcined limestone in the presence of O-2. O-2 plays an important role in NO removal by coconut shell char. The calcined limestone shows a strong catalytic effect on NO reduction by CO generated by the reaction of coconut shell char and O-2. The calcined limestone supports active sites for NO reduction by CO. High CO concentrations and high carbonation temperatures have positive effects on NO reduction by CO with calcined limestone catalysis. However, the catalytic effect of calcined limestone is weakened by its carbonation, which is promoted by the high temperature and additional CO2 produced by the oxidation of char. The simultaneous NO removal and CO2 capture efficiencies can reach above 97% and 80%, respectively. The porous structure of coconut shell char is an important factor in enhancing NO reduction with calcined limestone catalysis in the presence of O-2.
机译：提出了一种新的同时NO / CO 2去除使用Biochar和钙循环过程中煅烧石灰石的去除系统。将椰壳壳和煅烧的石灰石加入钙环处理过程中，分别为无还原剂和二氧化碳吸附剂。在鼓泡流化床反应器中研究了椰子壳焦炭/煅烧石灰石中的同时NO / CO 2去除性能。在O-2存在下，通过椰壳壳/煅烧的石灰石有效地和同时除去烟气中的NO和CO 2。 o-2在椰子壳炭块中发挥着重要作用。煅烧的石灰石显示出通过椰壳壳和O-2的反应产生的CO产生的强催化作用。煅烧的石灰石支持无效的活性位点，不需要减少CO。高CO浓度和高碳化温度对CO与煅烧石灰石催化的CO没有减少作用。然而，煅烧石灰石的催化作用通过其碳酸化削弱，其通过高温和通过氧化氧化而产生的额外CO 2促进。同时的除去和二氧化碳捕获效率分别可以达到97％和80％以上。椰子壳Char的多孔结构是在O-2存在下煅烧的石灰石催化不降低的重要因素。

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  • 来源
    《Fuel》 |2020年第15期|116428.1-116428.11|共11页
  • 作者

    Zhang Wan; Li Yingjie; Ma Xiaotong; Qian Yuqi; Wang Zeyan;

  • 作者单位

    Shandong Univ Sch Energy & Power Engn Jinan 250061 Shandong Peoples R China;

    Shandong Univ Sch Energy & Power Engn Jinan 250061 Shandong Peoples R China;

    Shandong Univ Sch Energy & Power Engn Jinan 250061 Shandong Peoples R China;

    Shandong Univ Sch Energy & Power Engn Jinan 250061 Shandong Peoples R China;

    Shandong Univ State Key Lab Crystal Mat Jinan 250100 Shandong Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Limestone; Biochar; Calcium looping; Simultaneous removal; CO2 capture; NO removal;

    机译：石灰石;生物炭;钙循环;同时移除;二氧化碳捕获;没有删除;

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