Heterogeneity of V2O5 Supported Cylindrical Activated Coke Used for SO2 Removal from Flue Gas
Heterogeneity of V2O5 Supported Cylindrical Activated Coke Used for SO2 Removal from Flue Gas
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DOI：
10.1002/ceat.200700332
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发表时间：
2008-07
影响因子：
2.1
通讯作者：
Jiancheng Wang;Qingya Liu;Zhenyu Liu;Zhanggeng Huang
中科院分区：
文献类型：
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作者：
Jiancheng Wang;Qingya Liu;Zhenyu Liu;Zhanggeng Huang
V2O5 负载的活性焦 (V/AC) 被证明是去除烟气中 SO2 的良好催化剂。在这项工作中，通过逐层剥离颗粒来研究圆柱形 V/AC 颗粒（Φ 8.5 · 12.6 mm）的不均匀性。结果表明，催化剂的轴向两端深度为ca。 2毫米比催化剂的其他部分含有更多的孔隙。这种孔隙结构分布通过浸渍产生相似的 V2O5 分布，并在去除 SO2 后产生相似的 S 分布。结果表明，传质是影响大V/AC颗粒去除SO2的主要因素，且SO2去除主要沿颗粒轴向进行。颗粒应在轴向上做得较短，在径向上较长，以提高V/AC的利用率。
V2O5 supported activated coke (V/AC) was shown to be a good catalyst for SO2 removal from flue gas. In this work, the heterogeneities of cylindrical V/AC granules (Φ 8.5 · 12.6 mm) are investigated by peeling the granules layer by layer. The results show that the axial ends of the catalyst with a depth of ca. 2 mm contain more pores than other parts of the catalyst. This pore structure distribution results in a similar V2O5 distribution through impregnation and a similar S distribution after SO2 removal. The results show that mass transfer is the main factor affecting SO2 removal over large V/AC granules, and that SO2 removal proceeds mainly along the axial direction of the granules. The granule should be made shorter in the axial direction and longer in the radial direction to improve utilization of V/AC.