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摘要
利用碳酸钠对稻壳进行水热脱硅,得到脱硅稻壳炭(RHC),并以RHC为原料,分别使用一定浓度的NaOH、H3PO4和ZnCl2在一定温度下对RHC进行活化改性制得稻壳基脱硅活性炭(RHAC)吸附剂,并依据RHAC对正己烷的静态吸附率进行实验条件优选,并对优选条件下制得的RHAC进行油气动态吸附实验及其物性参数表征。结果表明:H3PO4溶液活化RHC制备RHAC为最佳活化剂,最优实验条件为H3PO4溶液浓度34%,浸渍时间6h,活化时间60min,活化温度500℃;RHAC对油气的饱和吸附率为26.39%,比表面积为823.68m2/g,总孔容为0.645cm3/g,平均孔径为2.163nm。
Abstract
Hydrothermal desilication of cheap and available rice husk was carried out by sodium carbonate to obtain RHC,then RHC was used as the raw materials,activation modification of RHC was carried out by a certain concentration of NaOH,H3PO4 and ZnCl2 under a certain temperature to prepare RHAC.The experimental condition was optimized based on the static adsorption rate of RHAC on hexane,and the dynamic adsorption experiment of oil vapor and characterization of physical property parameter of RHAC which was prepared under optimum conditions were carried out.Results showed that the optimum activator for RHAC was H3PO4 solution which was used to activate RHC.The optimum experimental condition was that RHC impregnation used H3PO4 solution with mass fraction was 34% for 6 hours,and then activating it for 60 minutes under 500℃.The dynamic adsorption rate of RHAC on oil vapor was 26.39%,the specific surface area 823.68m2/g,the total pore volume 0.645cm3/g,the average pore diameter 2.163nm.
关键词
脱硅稻壳炭
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活化改性
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吸附
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物性参数
Key words
rice husk activated carbon(RHC)
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activation modification
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adsorption
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physical property parameter
稻壳基脱硅活性炭的制备及其对油气吸附性能研究[J].
化工新型材料, 2017, 45(9): 212-214 DOI:
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基金资助
江苏省高校“青蓝工程”(SCZ1409700002);江苏省科技成果转化专项资金(BA2015166);常州市科技支撑计划(工业)(CE20150085)
