Desulphurization performance of TiO2-modified activated carbon by a one-step carbonization-activation method
Desulphurization performance of TiO2-modified activated carbon by a one-step carbonization-activation method
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一步炭化活化法TiO2改性活性炭的脱硫性能
DOI：
10.1080/09593330.2015.1135991
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发表时间：
2016-02
影响因子：
2.8
通讯作者：
Jiang Wenju
中科院分区：
文献类型：
--
作者：
Zhang Chuanjun;Yang Danni;Jiang Xia;Jiang Wenju
摘要以TiO 2粉体为添加剂，与烟煤、炼焦煤原料直接混合，采用一步炭化活化法制备改性活性炭（Ti/AC）。通过添加不同比例的TiO 2（0- 12wt%）制备了Ti/AC样品，并对其脱硫性能进行了评价。 结果表明，所有Ti/AC样品的脱硫活性均高于空白样品，当TiO 2掺量为6wt%时，样品的穿透硫容量最高，为200.55mg/g C。 Brunauer-Emmett-Temer测试结果表明，Ti/AC样品中微孔占主导地位，其纹理特征与空白样品相比没有明显变化。X射线光电子能谱（XPS）分析结果表明，负载TiO 2会影响表面官能团的相对含量，Ti/AC样品中π-π* 跃迁基团的相对含量略高，脱硫后C=O和π-π* 跃迁基团的相对含量明显降低。X射线衍射结果表明，Ti/AC样品表面以金红石型TiO 2和金红石型TiO 2共存。脱硫过程后，Ti/AC样品中的TiO 2相没有发生变化，没有观察到Ti（SO 4）2，而硫酸盐是主要的脱硫产物。可以推测，SO2可以被TiO 2间接催化氧化成SO 3，而不是TiO 2直接与SO2反应成Ti（SO 4）2。
ABSTRACT In this study, TiO2 powder was used as the additive to directly blend with raw bituminous coal and coking coal for preparing modified activated carbon (Ti/AC) by one-step carbonization-activation method. The Ti/AC samples were prepared through blending with different ratios of TiO2 (0–12 wt%) and their desulphurization performance was evaluated. The results show that the desulphurization activity of all Ti/AC samples was higher than that of the blank one, and the highest breakthrough sulphur capacity was obtained at 200.55 mg/g C when the blending ratio of TiO2 was 6 wt%. The Brunauer-Emmett-Temer results show that the micropores were dominant in the Ti/AC samples, and their textual properties did not change evidently compared with the blank one. The X-ray photoelectron spectroscopy results show that the loaded TiO2 could influence the relative content of surface functional groups, with slightly higher content of π–π* transitions groups on the Ti/AC samples, and the relative contents of C=O and π–π* transitions groups decreased evidently after the desulphurization process. The X-ray diffraction results show that the anatase TiO2 and rutile TiO2 co-existed on the surface of the Ti/AC samples. After the desulphurization process, TiO2 phases did not change and Ti(SO4)2 was not observed on the Ti/AC samples, while sulphate was the main desulphurization product. It can be assumed that SO2 could be catalytically oxidized into SO3 by TiO2 indirectly, rather than TiO2 directly reacted with SO2 to Ti(SO4)2.
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影响因子：
3.9
作者：
C. Moreno-Castilla;F. Carrasco-Marín;E. Utrera-Hidalgo;J. Rivera-Utrilla
通讯作者：
C. Moreno-Castilla;F. Carrasco-Marín;E. Utrera-Hidalgo;J. Rivera-Utrilla
影响因子：
5.2
作者：
Cagnon, B;Py, X;Stoeckli, F
通讯作者：
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影响因子：
11.4
作者：
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影响因子：
10.9
作者：
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通讯作者：
Sónia A. Carabineiro;Douglas W McKee;Isabel F Silva
影响因子：
10.9
作者：
P. Davini
通讯作者：
P. Davini