Impact of Fly Ash Composition on Mercury Speciation in Simulated Flue Gas
Impact of Fly Ash Composition on Mercury Speciation in Simulated Flue Gas
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DOI：
10.3155/1047-3289.59.11.1331
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发表时间：
2009-11-01
影响因子：
2.7
通讯作者：
Vidic, Radisav D.
中科院分区：
文献类型：
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作者：
Bhardwaj, Ravi;Chen, Xihua;Vidic, Radisav D.
在这项研究中，不同的飞灰样品对汞形态在模拟烟气中在140摄氏度的影响进行了评估。在固定床反应器中进行了实验，以确定飞灰的形态特征和化学成分对汞的吸收和氧化的影响。在140 ℃下没有观察到均匀的汞氧化。不同飞灰样品的汞吸收测试表明，烧失量（LOI）、表面积和粒度都对汞的氧化和吸附有积极影响（即，随着上述参数的增加，汞的吸附和氧化也增加）。纯无机成分的实验表明，氧化铝（Al2O3）、二氧化硅（SiO2）、氧化钙（CaO）、氧化镁（MgO）和二氧化钛（TiO2）不会促进汞的氧化或吸附。氧化铁（Fe2O3）和未燃烧的碳，另一方面，表现出显着的汞氧化和捕获。
The impact of different fly ash samples on mercury speciation in simulated flue gas at 140 degrees C was evaluated in this study. Experiments were conducted in a fixed bed reactor to determine the impact of fly ash morphological characteristics and chemical composition on mercury uptake and oxidation. No homogeneous mercury oxidation was observed at 140 degrees C. Mercury uptake tests with different fly ash samples revealed that loss on ignition (LOI), surface area, and particle size all had positive effects on mercury oxidation and adsorption (i.e., as the above parameters increased, mercury adsorption and oxidation also increased). Experiments with pure inorganic components showed that alumina (Al2O3), silica (SiO2), calcium oxide (CaO), magnesium oxide (MgO), and titania (TiO2) do not promote mercury oxidation or adsorption. Ferric oxide (Fe2O3) and unburned carbon, on the other hand, showed significant mercury oxidation and capture.