Silicalite-1/ACF制备及对NO催化氧化NO<sub>2</sub>的催化活性

李裕; 李军平; 薛泽慧

doi:10.1016/S1872-5805(17)60105-7

Silicalite-1/ACF制备及对NO催化氧化NO₂的催化活性

doi: 10.1016/S1872-5805(17)60105-7

中北大学化工与环境学院, 山西太原 030051

基金项目: 山西省科技重大专项（20111101013）.

详细信息

通讯作者:
李裕.E-mail:hgliyu@nuc.edu.cn

中图分类号: TQ342⁺.74
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- 被引次数: 0
出版历程
- 收稿日期: 2016-10-18
- 录用日期: 2017-02-25
- 修回日期: 2016-01-03
- 刊出日期: 2017-02-28

Preparation of a silicalite/ACF composite and its catalytic activity for NO oxidation to NO₂

School of Chemical Engineering and environment, North University of China, Taiyuan 030051, China

Funds: Major Program of Science and Technology of Shanxi Province (20111101013).

摘要

摘要: 采用晶种浸渍和二次水热法制备了Silicalite-1/ACF复合催化材料，采用扫描电子显微镜（SEM）、X射线衍射（XRD）和N₂吸附和脱附等手段进行样品表征。结果表明，炭纤维表面清晰可见Silicalite-1包覆层，Silicalite-1/ACF复合材料的BET比表面积为826 m²·g^-1，孔体积为0.42 cm³·g^-1，平均孔径约为0.64 nm。在室温下研究了Silicalite-1/ACF复合催化材料对NO催化氧化NO₂的催化活性，相对湿度高于25%时，NO催化转化率超过38%，Silicalite-1/ACF复合催化材料具有良好的抗水汽性能和催化活性，主要是由于包覆的Silicalite-1具有良好的疏水性能。
- Silicalite-1/ACF复合材料 /
- 制备 /
- NO /
- 催化氧化
Abstract: A silicalite/activated carbon fiber (ACF) composite was prepared by a two-step method, in which nitric acid oxidation was used to incorporate hydrophilic groups to improve crystal seed impregnation and a hydrothermal process was used to grow silicalite on the ACFs. The samples were characterized by SEM, XRD and N₂ adsorption. Results showed that the surface of the ACFs was covered with a silicalite layer, and the specific surface area, pore volume and average pore size of the composite were 826 m²·g^-1, 0.42 cm³·g^-1 and 0.64 nm, respectively. The catalytic activity of the ACFs for NO oxidation to NO₂ was higher than that of a composite loaded with 10 wt% silicalite under dry conditions. However, the latter had a much better resistance to vapor and exhibited a more stable catalytic activity than the ACFs under moist conditions.
- Silicalite-1/ACF composites /
- Preparation /
- Nitrogen monoxide /
- Catalytic oxidation

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