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A series of the coconut activated carbons(CAC) based absorbents modified with Cu and Ce(Cu/CAC,Cu/Ce/CAC) were prepared by impregnation technology for carbon dioxide capture.The adsocrption equilibriums of CO2 on Cu/CAC and Cu/Ce/CAC were measured.The results showed that the adsorption capacity of CO2 onto the activated carbon modified with Cu/Ce increased with the decreasing temperature in the same pressure.The adsorption capacity of CO2 on Cu/CAC was higher than that of the blank CAC,and compared with the Cu/CAC,the adsorption capacity of CO2 of Cu/Ce/CAC with the mass ratio of Cu/Ce=30 was improved at 298 and 303 K.In addition,the adsorption equilibrium data for CO2 at various temperatures was fitted to Langmuir,Freundlich and D-R isotherm models.It was found that the D-R equation was the best model for fitting the adsorption data on Cu/Ce/CAC at different temperatures. 相似文献
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通过吸附穿透曲线和吸附容量,考察了两种活性炭吸附剂在不同气氛条件下SO2和NO的常温吸附性能.结果表明,无氧条件下,活性炭对NO吸附能力较弱;有氧时,O2可促进NO在活性炭上的吸附转化;无氧条件下,活性炭吸附SO2的性能远远强于吸附NO;O2的存在均可提高两种活性炭对NO和SO2的吸附能力.预吸附NO形成的某些NOx物种可促进SO2吸附.SO2对NO的吸附有明显抑制作用.同时吸附时,SO2和NO不会单独占据同一活性中心,即SO2与NO可能有共同的吸附位,并形成新的吸附态中间产物.且比较两种活性炭的常温吸附性能,椰壳活性炭强于煤质活性炭. 相似文献
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