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SO_2 Absorption by a Fixed Calcite Bed

机译:固定方解石床吸收SO_2

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摘要

When burning high-sulfur fuels, calcite is added to a furnace to reduce SO_2 emissions. Calcite and the resulting calcium sulfite start to cake above temperatures of 700℃, adversely affecting SO_2 bonding and complicating the problem of mathematically simulating the process. The catalytic burning of fuel enables us to lower the maximum temperature of fuel combustion from 1200℃ to 700℃. This reduces the caking of materials and allows the use of simple calculation models. The aim of this work is to create a simplified model of the kinetics of the observed process, based on experimental data obtained using a reactor with a fixed cal- cite bed at temperatures of 500–600℃. According to the model, SO_2 absorption is a second-order reaction (first order with respect to SO_2 and to free sites capable of SO_2 bonding), and the fraction of free sites falls linearly as the quantity of absorbed SO_2 grows. The kinetic parameters of the model are determined, i.e., the reaction rate constant and maximum calcite capacity with respect to SO_2.
机译:在燃烧高硫燃料时,将方解石添加到熔炉中以减少SO_2排放。方解石和生成的亚硫酸钙在700℃以上的温度下开始结块,对SO_2的键合产生不利影响,并使在数学上模拟该过程的问题变得复杂。燃料的催化燃烧使我们能够将燃料燃烧的最高温度从1200℃降低到700℃。这减少了材料的结块,并允许使用简单的计算模型。这项工作的目的是基于使用固定钙床的反应器在500–600℃的温度下获得的实验数据,创建观察过程动力学的简化模型。根据该模型,SO_2的吸收是二级反应(相对于SO_2和具有SO_2键合能力的自由位点而言是一级反应),并且随着SO_2吸收量的增加,自由位点的比例呈线性下降。确定模型的动力学参数,即相对于SO 2的反应速率常数和最大方解石容量。

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