Removal of sulfur dioxide from diesel exhaust gases by using dry desulfurization MnO2 filter
Removal of sulfur dioxide from diesel exhaust gases by using dry desulfurization MnO2 filter
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DOI：
10.1016/j.seppur.2015.02.001
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发表时间：
2015-08-17
影响因子：
8.6
通讯作者：
He, Zhaohong
中科院分区：
文献类型：
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作者：
Osaka, Yugo;Kito, Tsuyoshi;He, Zhaohong
中等规模设施或远洋船舶的燃烧废气中含有的二氧化硫（SO2）是一种空气污染物，必须加以去除。在这项研究中，干的锰氧化物的DeSO（x）过滤器用于捕获SO2与简单的硫酸盐反应。热重分析（TG）实验表明，比表面积为250 m（2）/g的MnO 2样品在450摄氏度和250摄氏度下分别吸收约0.45 g-（SO2）/g-（MnO 2）和0.18 g（SO2）/g（MnO 2）的SO2。采用填充床脱硫穿透实验研究了深度脱硫的可行性。结果表明，入口SO2几乎被高比表面积（HSSA）MnO 2床层吸收，在空速为0.5 × 10（4）h（-1）时，吸收率超过99.5%。更高的空速条件旨在实现更紧凑的过滤器。在5.0 × 10 ~（4）h ~（-1）的条件下，SO_2的吸收率可达进口SO_2的80%以上。总之，这种材料具有足够大的SO2吸收率，可以捕获大量的SO2气体。(C)2015爱思唯尔B. V.保留所有权利。
The sulfur dioxide (SO2) contained in combustion exhaust gases from medium-scale facilities or ocean ships must be removed because of its role as an air pollutant. In this study, dry DeSO(x) filter of manganese oxide was used to capture SO2 with a simple sulfate reaction. The thermogravimetry (TG), experiments shows that the MnO2 sample having a specific surface area of 250 m(2)/g absorbed SO2 at about 0.45 g-(SO2)/g-(MnO2) and 0.18 g(SO2)/g(MnO2) at 450 degrees C and 250 degrees C, respectively. Desulfurization breakthrough experiment in a packed bed was employed to evaluate the possibility of deep desulfurization. As a result, the inlet SO2 is almost absorbed by the high specific surface area (HSSA) MnO2 bed, over 99.5% absorbed at space velocity of 0.5 x 10(4) h(-1). Higher space velocity condition is targeting a more compact filter. Under the condition of 5.0 x 10(4) h(-1), SO2 over 80% against inlet SO2 can be absorbed at early time. Conclusively, this material has a large enough SO2 absorption rate to capture significant amounts of SO2 gas. (C) 2015 Elsevier B.V. All rights reserved.