期刊
JOURNAL OF NATURAL GAS CHEMISTRY
卷 20, 期 5, 页码 460-464出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S1003-9953(10)60232-0
关键词
activated carbon; greenhouse gas; adsorption property; CH4; CO2
资金
- National Natural Science Foundation of China [20773090]
- Specialized Research Fund for the Doctoral Program of Higher Education [200806100009]
Three kinds of activated carbons were prepared using coconut-shells as carbon precursors and characterized by XRD, FT-IR and texture property test. The results indicate that the prepared activated carbons were mainly amorphous and only a few impurity groups were adsorbed on their surfaces. The texture property test reveals that the activated carbons displayed different texture properties, especially the micropore size distribution. The adsorption capacities of the activated carbons were investigated by adsorbing CH4, CO2, N-2 and O-2 at 25 degrees C in the pressure range of 0-200 kPa. The results reveal that all the activated carbons had high CO2 adsorption capacity, one of which had the highest CO2 adsorption value of 2.55 mmol/g at 200 kPa. And the highest adsorption capacity for CH4 of the activated carbons can reach 1.93 mmol/g at 200 kPa. In the pressure range of 0-200 kPa, the adsorption capacities for N-2 and O-2 were increased linearly with the change of pressure and K-AC is an excellent adsorbent towards the adsorption separation of greenhouse gases.
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