The effects of relative humidity (RH), carbon dioxide (CO 2 ), methane (CH 4 ), oxygen (O 2 ) presence and gas hourly space velocity (GHSV) on H 2 S adsorption dynamics of KOH/CaO impregnated activated carbon are investigated in this study. X-ray diffraction (XRD), scanning electron microscopy with energy dispersive X-ray detector (SEM-EDX), thermogravimetric analysis (TGA), and Fourier Transform Infrared Spectroscopy (FTIR) techniques are applied and nitrogen adsorption characteristics are determined for characterization. The presence of water, O 2 and lower GHSV has beneficial effects on the activated carbon performance. CO 2 decreases the adsorption capacity due to its acidic characteristics. Best adsorption capacity is obtained as 13 wt % in KOH/CaO impregnated activated carbon, in a CH 4 (60%)/CO 2 (38%)/O 2 (2%) gas atmosphere, at ambient temperature, RH 90 and 5000 h -1 GHSV. Sulphur species formation was verified with the help of SEM-EDX, XRD, TGA, FTIR and nitrogen adsorption analysis on the exhausted samples.
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机译：相对湿度（RH），二氧化碳（CO 2），甲烷（CH 4），氧气（O 2）的存在和气体时空速（GHSV）对KOH / CaO浸渍活性炭对H 2 S吸附动力学的影响是在这项研究中进行了调查。使用X射线衍射（XRD），带有能量色散X射线检测器的扫描电子显微镜（SEM-EDX），热重分析（TGA）和傅立叶变换红外光谱（FTIR）技术，并确定氮的吸附特性以进行表征。水，O 2和较低的GHSV的存在对活性炭性能具有有益的影响。 CO 2由于其酸性特性而降低了吸附能力。在CH 4（60％）/ CO 2（38％）/ O 2（2％）气体气氛中，环境温度，RH 90和5000下，在KOH / CaO浸渍的活性炭中，最佳吸附容量为13 wt％ h -1 GHSV。借助于SEM-EDX，XRD，TGA，FTIR和对残留样品的氮吸附分析，验证了硫的形成。
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