SO<sub>2</sub>和NO浓度对TiO<sub>2</sub>-硅酸铝纤维脱除元素汞的影响

袁媛; 张军营; 赵永椿; 王宇翔; 郑楚光

SO₂和NO浓度对TiO₂-硅酸铝纤维脱除元素汞的影响

华中科技大学煤燃烧国家重点实验室, 湖北武汉 430074

基金项目: 国家自然科学基金(40972102,50936001,51021065);国家重点基础研究发展规划(973计划,2011CB201500)。

详细信息

通讯作者:
张军营(1963-), 男, 教授, 从事燃烧污染物的排放与控制方面的研究。 E-mail: jyzhang@mail.hust.edu.cn。

中图分类号: X7
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出版历程
- 收稿日期: 2011-07-02
- 修回日期: 2011-10-19
- 刊出日期: 2012-05-31

Effects of SO₂ and NO on removal of elemental mercury using a TiO₂-aluminum silicate fiber

State Key Lab of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China

Funds: 国家自然科学基金(40972102,50936001,51021065);国家重点基础研究发展规划(973计划,2011CB201500)。

摘要

摘要: 使用溶胶凝胶法制备了TiO₂-硅酸铝纤维纳米复合材料。使用此复合材料在波长为253.7 nm的紫外光照射下脱除模拟烟气中的元素汞,实验研究了SO₂和NO浓度对光催化脱汞的影响以及温度对脱汞率的影响。结果表明,常温时烟气中SO₂浓度对光催化脱汞表现出促进作用,当SO₂浓度为1 200 μg/m³时脱汞率最高可达93%。NO浓度对光催化脱汞表现出抑制作用,随着NO浓度的增加脱汞率逐渐降低。高温时SO₂和NO浓度对光催化脱汞的作用规律与常温时相似。随着模拟烟气温度的升高,脱汞率逐渐减低,升高温度对光催化脱汞表现出抑制作用。
- 纳米TiO₂复合材料 /
- 光催化 /
- SO₂ /
- NO /
- 脱汞
Abstract: A novel TiO₂-aluminum silicate fiber nanocomposite was prepared by sol-gel method, and used to remove the elemental mercury from a simulated coal-fired flue gas under UV irradiation at a wavelength of 253.7 nm. The effects of SO₂, NO and temperature on the photocatalytic removal of mercury were tested. The result shows that SO₂ has a stimulative effect on the photocatalytic removal of mercury at ambient temperature. The mercury removal can reach to 93% when the SO₂ concentration is 1 200 μg/m³. However, NO shows an inhibitory effect on the elemental mercury removal, and the removal efficiency decreases with the increasing of NO concentration. At high temperature, the effects of SO₂ and NO on the photocatalytic removal of mercury are the same as those at the normal temperature. The mercury removal efficiency decreases as the temperature increases. Elevating temperature shows an inhibitory effect on the photocatalytic removal of mercury.
- TiO₂ nanocomposite /
- photocatalysis /
- SO₂ /
- NO /
- mercury removal

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参考文献(23)

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