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Optimization of a lime-based sorbent for carbonation at low temperature enhanced by water vapor

机译：水蒸气增强的低温碳酸钙吸附剂的优化

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摘要

Carbonation reaction of lime modified by small amounts of MgO was studied by submitting pelletized samples to the exhaust gas of a petrol engine at about 100 ℃. The results showed that either the kinetic or the diffusion behavior is non-linearly dependent with the addition of MgO. Moreover, there is an optimum MgO percentage that enhances diffusion and ultimate sample conversions. Samples with 10% and 5% of additive showed faster initial kinetic and greater conversion, respectively. These results demonstrate that a small addition of MgO can increase the reactivity, sorption capacity and gas diffusion. Finally, the studied experiments revealed an intense interaction between CO_2 and magnesium oxide. Theoretical analysis of the final conversion parameters suggests an optimized MgO concentration of about 7%.
机译：通过将颗粒状样品送入汽油发动机的废气中，温度约为100℃，研究了用少量MgO改性的石灰的碳酸化反应。结果表明，动力学或扩散行为与MgO的添加非线性相关。而且，存在最佳的MgO百分比，可提高扩散和最终样品转化率。含有10％和5％添加剂的样品分别显示出更快的初始动力学和更高的转化率。这些结果表明，少量添加MgO可以提高反应性，吸附能力和气体扩散。最后，所研究的实验揭示了CO_2和氧化镁之间的强烈相互作用。最终转化参数的理论分析表明，优化的MgO浓度约为7％。

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  • 来源
    《Fuel》 |2013年第4期|827-836|共10页
  • 作者

    Flavia G. Pacheco; Geison P. Voga; Geraldo M. de Lima; Jadson C. Belchior;

  • 作者单位

    Departamento de Quimica - ICEx, Universidade Federal de Minas Cerais, Av. Antonio Carlos 6627, Pampulha, 31,270-901 Belo Horizonte, Minas Gerais, Brazil;

    Departamento de Quimica - ICEx, Universidade Federal de Minas Cerais, Av. Antonio Carlos 6627, Pampulha, 31,270-901 Belo Horizonte, Minas Gerais, Brazil;

    Departamento de Quimica - ICEx, Universidade Federal de Minas Cerais, Av. Antonio Carlos 6627, Pampulha, 31,270-901 Belo Horizonte, Minas Gerais, Brazil;

    Departamento de Quimica - ICEx, Universidade Federal de Minas Cerais, Av. Antonio Carlos 6627, Pampulha, 31,270-901 Belo Horizonte, Minas Gerais, Brazil;

  • 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

    optimized sorbent; water vapor; MgO; CO_2; diffusion coefficient;

    机译：优化的吸附剂;水蒸气;氧化镁;CO_2;扩散系数;

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