摘要
以椰壳为原料、酚醛树脂为粘结剂及聚乙二醇(PEG)为造孔剂和分散剂,采用水蒸气活化制备活性炭,以所制备的活性炭为吸附剂,采用真空变压吸附法(VPSA)对乏风瓦斯进行分离富集.分别考察了不同活化条件对活性炭孔结构性能的影响,以及不同VPSA操作条件对乏风瓦斯富集效果的影响.结果表明:以酚醛树脂与粉体炭的质量比为0.5 g/g制备的成型炭作为炭质前驱体进行活化,在活化时间为5 h、通入水量为1.96 cm^3/min和活化温度为825℃的条件下制备的活性炭,其对应的比表面积、微孔体积及微孔率分别达到795 m^2/g、0.37 cm^3/g和84.1%;并以该活性炭为吸附剂,在最佳操作条件下,乏风瓦斯(甲烷含量约0.5%)经富集后,产气中CH4浓度和回收率分别为1.51%和96%.
The activated carbon was prepared by steam activation,with coconut shells as the raw material,phenolic resin as the binder and polyethylene glycol(PEG)as the pore-making agent and dispersant.Then it was used as the adsorbent in the separation and enrichment of ventilation air methane(VAM)by vacuum pressure swing adsorption(VPSA).The porous properties of activated carbon under different activation parameters and the efficiency of the enrichment of VAM under different VPSA conditions were systematically investigated.The results showed that the precursor of activated carbon was a molding carbon made of phenolic resin and powdered carbon with the mass ratio of 0.5 g/g.If the activate carbon was prepared under such operation conditions with the activation time of 5 h,the flow rate of water of 1.96 cm^3/min and the activation temperature of 825℃,its specific surface area,micropore volume and micropore ratio would be 795 m^2/g,0.37 cm^3/g and 84.1%,respectively.With such activated carbon as the adsorbent,under the optimum operation conditions,CH4 concentration in the gas production increased from 0.52 vol.%up to 1.51 vol.%and its recovery rate reached about 96%after the enrichment of VAM.
作者
陈文飞
欧阳少波
徐绍平
熊道陵
朱聪
郝召小
李鑫
马玲玲
杨佳棋
孙冰倩
胡华庆
邹来禧
舒庆
CHEN Wenfei;OUYANG Shaobo;XU Shaoping;XIONG Daoling;ZHU Cong;HAO Zhaoxiao;LI Xin;MA Lingling;YANG Jiaqi;SUN Bingqian;HU Huaqing;ZOU Laixi;SHU Qing(Faculty of Materials Metallurgy and Chemistry,Jiangxi University of Science and Technology,Ganzhou 341000,China;National Key Laboratory of Fine Chemical Engineering,Faculty of Chemical,Environmental and Biological Science and Technology,Dalian University of Technology,Dalian 116024,China)
出处
《有色金属科学与工程》
CAS
2019年第5期67-74,共8页
Nonferrous Metals Science and Engineering
基金
国家自然科学基金资助项目(21376046,21206062,21466013,21766009,51364014)
江西省自然科学基金资助项目(2013BBG70003)
江西省教育厅科学技术研究资助项目(GJJ170547)
江西理工大学大学生创新创业训练资助项目(DC2018-013)
江西理工大学博士启动基金资助项目(jxxjbs17034,jxxjbs17008)
关键词
椰壳
酚醛树脂
活性炭
乏风瓦斯
变压吸附
coconut shell
phenolic resin
activated carbon
ventilation air methane
pressure swing adsorption
