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介绍了CO吸附剂的制备方法,研究了该吸附剂在固定床温度30℃、CO分压为6 kPa(a)下吸附一氧化碳的动态吸附性能,测定了穿透曲线,动态吸附容量为2.138 5 mmol/g,并用BET吸附仪测定了制备的CO吸附剂比表面积,用电感耦合等离子体原子发射光谱(ICP)测定其离子交换度为52%,含铜量为9.52%(质量分数)。通过粉末X射线衍射仪(XRD)和场发射扫描电子显微镜(SEM)表征发现,水热交换法制备CO吸附剂,Cu2+有效地取代了NaY原粉中Na+,经过焙烧还原后仍然能够维持原骨架结构的完整。用NH3-TPD考察了改性前后吸附剂酸度的变化以及用H2-TPR考察了吸附剂合适的还原温度。采用130℃氮气吹扫的方法再生,再生彻底并且吸附效果稳定。
The preparation method of CO sorbent was introduced. The dynamic adsorption performance of the sorbent on carbon monoxide adsorbed at fixed bed temperature of 30 ℃ and CO partial pressure of 6 kPa (a) was studied. The breakthrough curve was measured with a dynamic adsorption capacity of 2.138 5 mmol / g, and the specific surface area of the prepared CO adsorbent was measured by a BET adsorber. The ion exchange degree was 52% and the content of copper was 9.52% (mass fraction) by inductively coupled plasma atomic emission spectrometry (ICP). The X-ray powder diffraction (XRD) and field emission scanning electron microscopy (SEM) showed that CO adsorbent was prepared by hydrothermal exchange method and Cu2 + effectively replaced Na + in NaY powder. After calcination and reduction, Structural integrity. The change of acidity of adsorbent before and after modification was investigated by NH3-TPD and the suitable reduction temperature of adsorbent was investigated by H2-TPR. Using 130 ℃ nitrogen purge regeneration method, the regeneration and the adsorption effect is stable.