目的 提高活性炭对二氧化碳的吸附性能。方法 用二乙烯三胺浸渍方法对活性炭进行表面处理，利用X射线衍射仪对活性炭表面处理前后进行物相分析，利用全自动比表面及空隙度分析仪，对活性炭表面处理前后进行比表面积和孔结构分析。最后对活性炭表面处理前后进行吸附实验，并对其进行理论分析。结果 表面处理后，活性炭中的碳由三方晶系变为六方晶系，并且活性炭表面增加了氨基。活性炭的比表面积增加了2.13倍；微孔容增加了1.80倍，由0.056 cm3/g增加至0.157 cm3/g；总孔容增加了3.24倍，由0.078 cm3/g增加至0.331 cm3/g；中孔容增加量为0.152 cm3/g；平均孔径减小了0.27 nm，由7.14 nm减少至6.87 nm。活性炭的吸附量由0.92 mmol/g增加至3.55 mmol/g，是表面处理前的3.86倍，其饱和吸附时间从10 min增加至40 min。结论 此方法可以有效提高活性炭的吸附性能。

The work aims to improve adsorption property of activated carbon for CO2. Phase of activated carbon before and after surface treatment was analyzed with X-ray diffractometer in DETA impregnation method. Specific surface area and pore structure of the activated carbon before and after surface treatment were analyzed with full-automatic specific surface & voidage analyzer. Finally, an adsorption experiment and theoretical analysis were performed to the activated carbon before and after surface treatment. Carbon in the activated carbon subject to surface treatment changed from trigonal system to hexagonal system. And amino group was added on the surface of activated carbon. Specific surface area of the activated carbon increased by 2.13 times; microporosity increased by 1.80 times, from 0.056 cm3/g to 0.157 cm3/g; total porosity increased by 3.24 times, from 0.078 cm3/g to 0.331 cm3/g; increment of midporosity was 0.152 cm3/g; mean pore size decreased by 0.27 nm, from 7.14 nm to 6.87 nm. Adsorption capacity of the activated carbon increased from 0.92 mmol/g to 3.55 mmol/g, which was 3.86 times as high as that before surface treatment. Saturated adsorption time increased from 10 min to 40 min. This method can effectively improve the adsorption property of activated carbon.