摘要
采用固定床吸附及程序升温脱附(TPD)方法考察了NO2在活性炭上的吸附形态以及温度、O2、H2O等因素对活性炭吸附性能的影响。研究结果表明,活性炭在低温条件下可有效吸附NO2,其饱和吸附形态主要为-C(ONO2)基团。-C(ONO2)基团受热可分解为NO与NO2,残留在炭表面的含氧官能团在高温条件下可分解脱附为CO与CO2。随着吸附温度的升高,活性炭的吸附性能逐渐丧失。在低温条件下,O2对活性炭吸附性能无明显影响,而H2O的加入能有效提高其吸附量。
NO2 adsorption over activated carbon and the influences of temperature, O2 and H2O were investigated with fixed bed adsorption and temperature programmed desorption （TPD）. The results suggested that effective NO2 adsorption capacity can be achieved at low temperature. When the adsorption was saturated, the adsorbed nitrogen complexes were mainly -C（ ONO2 ）. The -C（ ONO2 ） complexes can be desorbed as NO and NO2 when heated, and the remaining oxygen complexes can be desorbed as CO and CO2 at higher temperature. However, the adsorption capactity of activated carbon was gradually vanished when the adsorption temperature increased. O2 did not influence the NO2 adsorption over activated carbon. On the other hand, H2O can effectively enhance the NO2 adsorption capacity.
出处
《能源工程》
2010年第1期35-38,43,共5页
Energy Engineering
基金
国家自然科学基金资助项目(50776079)
国家高技术研究发展计划项目(863项目
2007AA061802)
关键词
活性炭
NO2
动态吸附
脱附
activated carbon
NO2
dynamic adsorption
desorption
