微波辅助NaOH活化对兰炭基活性炭孔隙结构的影响  

Effect of microwave-NaOH activation on pore structure of blue coke-based activated carbon

作　　者：蒋绪[1,2] 兰新哲[2] 孟茁越 张昭[1] JIANG Xu;LAN Xin-zhe;MENG Zhuo-yue;ZHANG Zhao(Research Institute of Energy and Chemical Industry,Xianyang Vocational Technical College,Xianyang 712000,China;School of Metallurgical Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China)

机构地区：[1]咸阳职业技术学院医药化工学院,陕西咸阳712000 [2]西安建筑科技大学冶金工程学院,陕西西安710055

出　　处：《化学工程师》2022年第12期17-20,30,共5页Chemical Engineer

基　　金：陕西省重点研发计划(2020GY-247);咸阳市重点研发计划(2021ZDYF-GY-0045);咸阳职业技术学院科学研究基金项目(2020KJA03);咸阳职业技术学院科研创新团队项目(CX202104)。

摘　　要：本文选取兰炭基活性炭作为研究对象,采用微波辅助NaOH进行活化,通过计算收率和碘吸附实验、低温N_(2)等温吸附/脱附实验表征成品,重点研究了NaOH溶液浓度和微波加热条件对活性炭孔隙结构的影响。结果表明,兰炭基活性炭经0.5mol·L^(-1) NaOH溶液充分浸渍后,再在700W条件下活化10min效果最佳,成品较活化前保持丰富微孔结构的同时增加了中大孔比例,比表面积和微孔比表面积分别为721.24m^(2)·g^(-1)和512.13m^(2)·g^(-1),平均孔径2.14nm。微波加热和管式炉加热活化对比实验表明,虽然管式炉加热活化作用更强,对中大孔促进作用也更明显,但已经出现过度活化的趋势。Blue coke-based activated carbon(BAC)was activated by NaOH impregnation with microwave assisted.The pore structure of BAC sample were characterized by iodine adsorbed and cryogenic N_(2) adsorption techniques,the impact of NaOH concentration and microwave heating conditions on pore development of BACs were studied.The results show that the BAC maintains both rich micropore and mesopore compared with before,when concentration of NaOH is 0.5mol·L^(-1),microwave power is 700W,heating time is 10min,the specific surface area and micropore specific surface area of prepared BAC are 721.24m^(2)·g^(-1) and 512.13m^(2)·g^(-1) respectively,the average pore diameter is 2.14nm.By comparison with tube furnace heating activation tests,which have stronger activation and more obvious promoting effect on mesopore and macropore,but the overactivation tendency also appeared inevitability.

关 键 词：兰炭基活性炭 微波辅助NaOH活化 孔隙结构 

分 类 号：TQ424.1[化学工程]