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A model for calcium carbonate neutralization in the presence of armoring

机译:存在铠装的碳酸钙中和模型

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摘要

In this paper we present a mathematical model for the reaction between calcium carbonate (CaCO_3) and a solution containing sulfuric acid (H_2SO_4). We assume that Ca~(2+) ions (liberated on the reaction surface) react with SO_4~(2-) ions to form solid gypsum crystals (CaSO_4) which, in turn, may accumulate on the reaction surface, hindering the neutralizing process (armoring). We suppose that neutralization is governed by a first order reaction, with the reaction rate depending on the superficial density of solid CaSO_4. We prove that the problem is multiscale in time and study the problem in fast time scale (order of hours), showing numerical and analytical results. In particular we determine the conditions that guarantee complete neutralization.
机译:在本文中,我们提供了碳酸钙(CaCO_3)与含硫酸的溶液(H_2SO_4)之间反应的数学模型。我们假定Ca〜(2+)离子(释放在反应表面上)与SO_4〜(2-)离子反应形成固态石膏晶体(CaSO_4),而石膏晶体又可能积聚在反应表面上,从而阻碍了中和过程(装甲)。我们假设中和反应是由一阶反应控制的,反应速度取决于固体CaSO_4的表面密度。我们证明问题在时间上是多尺度的,并以快速时间尺度(小时数量级)研究该问题,显示了数值和分析结果。特别是,我们确定了保证完全中和的条件。

著录项

  • 来源
    《Applied Mathematical Modelling》 |2015年第1期|348-362|共15页
  • 作者

    L. Fusi; M. Primicerio; A. Monti;

  • 作者单位

    Dipartimento di Matematica e Informatica 'U.Dini', Universita degli Studi di Firenze, Viale Morgagni 67/A, 50134 Firenze, Italy;

    Dipartimento di Matematica e Informatica 'U.Dini', Universita degli Studi di Firenze, Viale Morgagni 67/A, 50134 Firenze, Italy;

    Dipartimento di Matematica e Informatica 'U.Dini', Universita degli Studi di Firenze, Viale Morgagni 67/A, 50134 Firenze, Italy,I2T3 - Innovazione Industriale Tramite Trasferimento Tecnologico Associazione (Onlus), Polo Scientifico Sesto Florentino (FI), Via Madonna del Piano 6, c/o Incubatore Universitario, 50019 Sesto Fiorentino (Fi), Italy;

  • 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

    Neutralization; Reaction kinetics; Armoring; Partial differential equations; Multi-scale modeling;

    机译:中和;反应动力学;装甲;偏微分方程;多尺度建模;

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