Sun Xin, Ruan Haotian, Song Xin, Sun Lina, Li Kai, Ning Ping, Wang Chi
Faculty of Environmental Science and Engineering, Kunming University of Science and Technology Kunming 650500 P. R. China
Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University P. R. China.
RSC Adv. 2018 Feb 12;8(13):6996-7004. doi: 10.1039/c7ra12086a. eCollection 2018 Feb 9.
In this work, tobacco stem active carbon (TSAC) catalysts loaded on to CuO and FeO were prepared by a sol-gel method and used for the simultaneous removal of hydrogen sulfide (HS), carbonyl sulfide (COS) and carbon disulfide (CS). The influences of the operating conditions such as reaction temperature, relative humidity (RH), O concentration, and gas hourly space velocity (GHSV) were discussed. DRIFTS results showed that the deactivation was attributed to the generation of S and sulfates. HO promoted the generation of sulfate. The enhancement of the hydrolysis of COS/CS was due to the promotion of HS oxidation by O. A high GHSV decreased the contact time between the gases and the catalyst. Meanwhile, a high GHSV was not conducive to the adsorption of gases on the surface of the catalyst. XPS results indicated that the deactivation of the catalyst was attributable to the formation of S containing components, such as thiol/thioether, S, -SO- and sulfate. BET results indicated that the adsorptive ability of the catalyst was related to the microporous volume and surface area.
在本工作中，采用溶胶 - 凝胶法制备了负载在CuO和FeO上的烟草茎活性炭（TSAC）催化剂，并用于同时去除硫化氢（HS）、羰基硫（COS）和二硫化碳（CS）。讨论了反应温度、相对湿度（RH）、O浓度和气体时空速（GHSV）等操作条件的影响。漫反射红外傅里叶变换光谱（DRIFTS）结果表明，失活归因于S和硫酸盐的生成。HO促进了硫酸盐的生成。COS/CS水解的增强是由于O促进了HS的氧化。高GHSV降低了气体与催化剂之间的接触时间。同时，高GHSV不利于气体在催化剂表面的吸附。X射线光电子能谱（XPS）结果表明，催化剂的失活归因于含硫组分的形成，如硫醇/硫醚、S、-SO-和硫酸盐。比表面积分析仪（BET）结果表明，催化剂的吸附能力与微孔体积和表面积有关。
