环境工程学报2016，Vol.10Issue(10)：5808-5814,7.DOI:10.12030/j.cjee.201504242
稻壳活性炭对噻吩类硫化物的吸附
Adsorption of thiophenic sulfur compounds on rice husk-based activated carbon
摘要
Abstract
Rice husk-based activated carbon was prepared by KOH impregnation and high temperature activation.The adsorption of thiophenic sulfur compounds from gasoline (used as a model) was investigated.Cyclohexene and methylbenzene were used as competing components,and the effect of alkene and arene on the adsorption properties were studied on the rice husk-based activated carbon.Various factors influencing adsorption capacity,such as carbonization temperature,soaked mass fraction of KOH,and activation temperature were investigated through static adsorption,and then the optimum preparation conditions ascertained.Langmuir and Freundlich adsorption models and adsorption kinetic models were used to fit the test results.The rice husk-based activated carbon was characterized by thermal analysis (TG),nitrogen sorption (BET) and scanning electron microscopy (SEM),and its thermal decomposition conditions,pore structure,and surface area were discussed.The results indicated that the specific surface area and average pore diameter of rice husk-based activated carbon were 1 207.649 m2 · g-1 and 2.24 nm,respectively.The total breakthrough capacity of sulfur through fixed bed dynamic adsorption was 7.092 4 mg · g-1.The adsorption breakthrough capacity of sulfur decreased by 36.4％ and 63.5％,for cyclohexene and toluene,respectively.The experimental results agreed well with a Langmuir and pseudo-n-order modified adsorption kinetics model.关键词
KOH浸渍/稻壳活性炭/模拟油/吸附性能Key words
KOH impregnation/rice husk-based activated carbon/model gasoline/adsorption capacity分类
资源环境引用本文复制引用
李文秀,陈仁燕,范俊刚,李平,田心瑶,张志刚..稻壳活性炭对噻吩类硫化物的吸附[J].环境工程学报,2016,10(10):5808-5814,7.基金项目
辽宁省自然科学基金资助项目(2013020080) （2013020080）
辽宁省教育厅科学研究一般项目(L2013162) （L2013162）
