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Optimum conditions for preparation of flue gas desulfurization absorbent from rice husk ash

机译：利用稻壳灰制备烟气脱硫吸收剂的最佳条件

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摘要

Several previous studies have reported the preparation of absorbents from coal fly ash variations as a source of siliceous material for the preparation of absorbents for flue gas desulfurization. On the other hand, this study presents findings from an experimental investigation of the preparation of absorbents from rice husk ash as the source of the siliceous material. The effect of various absorbent preparation variables such as hydration period, amount of rice husk ash, amount of calcium sulfate (CaSO_4) and hydration temperature on the BET (Brunner-Emmett-Teller) specific surface area of the absorbent were investigated. Based on the Central Composite Design (CCD) of experiments, a third order mathematical model was developed to correlate the absorbent preparation variables to the surface area of the absorbent. The predicted surface area was found to agree satisfactory with the experimental values. The model indicated that lower hydration period and temperature favor the formation of absorbent with higher surface area. Sulfation activity test on the absorbent revealed that the absorbent prepared from rice husk ash does have a high capacity in sulfur dioxide (SO_2) absorption.
机译：先前的一些研究已经报道了由粉煤灰变种制备吸收剂作为硅质材料的来源，用于制备烟道气脱硫吸收剂。另一方面，这项研究提出了从稻壳灰作为硅质材料来源制备吸收剂的实验研究中的发现。研究了各种吸收剂制备变量，例如水合时间，稻壳灰分的量，硫酸钙（CaSO_4）的量和水合温度对吸收剂BET（Brunner-Emmett-Teller）比表面积的影响。基于实验的中央复合设计（CCD），开发了三阶数学模型以将吸收剂制备变量与吸收剂的表面积相关联。发现预测的表面积与实验值令人满意。该模型表明，较低的水合时间和温度有利于形成具有较大表面积的吸收剂。对吸收剂的硫酸化活性测试表明，由稻壳灰制备的吸收剂确实具有高的二氧化硫（SO_2）吸收能力。

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