生物质活性炭吸附二氧化碳的性能研究  

CARBON DIOXIDE ADSORPTION PROPERTY OF ACTIVATED CARBON FROM BIOMASS

作　　者：廖景明[1] 肖军[1] 沈来宏[1] 常连成[1] 

机构地区：[1]东南大学能源与环境学院,南京210096

出　　处：《太阳能学报》2013年第3期382-387,共6页Acta Energiae Solaris Sinica

基　　金：国家重点基础研究(973)发展计划(2010CB732206;2007CB210208)

摘　　要：利用农业废弃物玉米秆、麦壳和稻壳为原料,二氧化碳为活化剂一步法制备生物质活性炭,研究活性炭制备时间和活化剂浓度对二氧化碳吸附性能的影响。结果表明,玉米秆为原料制备的活性炭比稻壳和麦壳活性炭具有更发达的孔隙结构,二氧化碳吸附能力更强;该文获得的活性炭的最适宜制备条件为制备温度800℃,制备时间30min,活化剂浓度为20%;在二氧化碳吸附分压为10%时,吸附率达到1.86%,当分压增大到100%时,吸附率可达6.3%以上;且中孔孔容对二氧化碳吸附性能的影响作用明显。Activated carbons were prepared from agricultural wastes（ corn stalk, wheat hull and rice hull）with one- step process by utilizing carbon dioxide as activator. The effects of both preparation time and concentration of acti- vator on the CO2 adsorption property of activated carbons were studied in this paper. The results show that the acti- vated carbons prepared from corn stalks have more developed porous structure than those from wheat hulls and rice hulls and consequently have higher CO2 adsorption capacity. The suitable preparation condition of activated carbons for CO2 capture is at 800℃ with 20% CO2 flow for 30 minutes. The adsorption rate reaches to 1.86% while CO2 partial pressure is 10%. When increasing the CO2 partial pressure from 10% to 100%, the adsorption rate could be more than 6.3%. Particularly, the CO2 adsorption property of activated carbons is affected obviously by meso- pore volume.

关 键 词：生物质 活性炭 孔结构 二氧化碳 吸附 

分 类 号：TK6[动力工程及工程热物理—生物能]