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首页> 外文期刊>Chemical Engineering Science >Effect of Ca(OH)(2)/fly ash weight ratio on the kinetics of the reaction of Ca(OH)(2)/fly ash sorbents with SO2 at low temperatures
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Effect of Ca(OH)(2)/fly ash weight ratio on the kinetics of the reaction of Ca(OH)(2)/fly ash sorbents with SO2 at low temperatures

机译：Ca（OH）（2）/粉煤灰重量比对Ca（OH）（2）/粉煤灰吸附剂在低温下与SO2反应动力学的影响

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摘要

Ca(OH)(2)/fly ash sorbents were prepared with different weight ratios. Their reactions with SO2 have been studied under the conditions similar to those in the bag filters of the spray-drying flue gas desulfurization system. The sorbent reactivity increased in general with decreasing Ca(OH)(2)/fly ash weight ratio. The reaction kinetics was well described by the surface coverage model which assumes that the sorbent was made up of plate grains and the rate was controlled by the chemical reaction on the grain surface and takes into account the surface coverage by products. For sorbents with Ca(OH)(2)/fly ash weight ratios than 10/90, the effect of weight ratio on the reaction was entirely represented by the effects of the intial specific surface area and the Ca content of the sorbent. (C) 2004 Elsevier Ltd. All rights reserved.
机译：制备具有不同重量比的Ca（OH）（2）/粉煤灰吸附剂。在类似于喷雾干燥烟气脱硫系统袋式过滤器的条件下，研究了它们与SO2的反应。吸附剂反应性通常随Ca（OH）（2）/粉煤灰重量比的降低而增加。表面覆盖模型很好地描述了反应动力学，该模型假设吸附剂由板状颗粒组成，并且速率由颗粒表面的化学反应控制，并考虑了副产物的表面覆盖。对于Ca（OH）（2）/粉煤灰重量比大于10/90的吸附剂，重量比对反应的影响完全由初始比表面积和吸附剂中Ca含量的影响表示。 （C）2004 Elsevier Ltd.保留所有权利。

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