摘要
采用CO2物理活化法将废弃的夏威夷坚果壳制备成高品质活性炭。实验研究测定了活化温度、活化时间、CO2流量等因素对活性炭的吸附性能和产率的影响。通过响应曲面法得到实验优化工艺条件:活化温度766℃、活化时间36 min、CO2流量186 m L/min,所制备的活性炭亚甲基蓝值和产率分别为186 mg/g,71.35%。衡量活性炭品质的关键性参数BET比表面积、孔容和平均孔径分别为1 267 m2/g,0.97 m L/g和4.13 nm。此外通过扫描电镜对比炭化料和活性炭分析发现,活性炭表面具有大量无规则孔隙。
Spent Hawaii nut shell was converted into a high-quality activated carbon via CO2 physical activation. The operational variables including activation temperature,activation duration and CO2 flow rate on the adsorption capability and yield of activated carbon were identified. The operating variables were optimized utilizing the response surface methodology and were identified:activation temperature of 766℃,an activation duration of 36 min and a CO2 flow rate of 186 m L/min with the methylene blue adsorption number of 186 mg/g and yield of 71. 35%. The key parameters that characterize quality of the activated carbon such as the BET surface area,total pore volume and average pore diameter were estimated to be 1 267 m2/ g,0. 97 m L/g and 4. 13 nm,respectively. Additionally,through the SEM analyzing of char and activated carbon,the surface of activated carbon has large number of pores of irregular.
出处
《环境工程学报》
CAS
CSCD
北大核心
2015年第9期4495-4502,共8页
Chinese Journal of Environmental Engineering
基金
国家高技术研究发展计划(863)项目(2015AA02020)
云南省应用基础研究计划项目(2015FB129)
云南省中青年学术和科技带头人后备人才(2012HB008)
云南科技创新人才计划-科技领军人才(2013HA002)
昆明理工大学人才培养基金(KKSY201252077)
关键词
夏威夷坚果壳
活性炭
亚甲基蓝
响应曲面
Hawaii nut shell
activated carbon
methylene blue
response surface methodology