辣椒秸秆生物质活性炭的制备及其性能表征
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摘要
用KOH活化法制备辣椒秸秆生物质活性炭(AC),对辣椒秸秆进行资源化再利用。确定了AC的最佳制备条件,并对材料的结构及理化性能进行表征。结果表明,KOH活化法制备AC最佳条件为:活化温度为800℃、活化时间为100min、炭剂比为3、浸渍时间为20h。在此条件下AC的碘吸附值为1348.44mg/g,亚甲基蓝吸附值为19.0mL/0.1g,比表面积达1761.16m~2/g,含有羧基、酚、醚基、胺基等亲水性基团,为微孔型活性炭。KOH活化法所制备的AC具有良好的吸附性能,为辣椒秸秆的资源化利用提供了参考数据。
Biomass activated carbon(AC)of pepper straw was prepared through the method of KOH activation.Activation temperature,activation time,ratio of carbon and impregnation time were taken into account as the influencing factors by the orthogonal experiment.And the adsorption of iodine and methylene blue were two indicators for adsorption performance of AC.Then the optimum conditions for preparing AC were obtained.Structure and physicochemical properties of the composites were characterized.This results show that the optimum conditions for the preparation of AC by KOH activation method are activation temperature of 800℃,activation time of 100 min,carbon/agent ratio of 3 and immersion time of 20 h.Under this condition,the iodine adsorption value of AC is 1348.44 mg/g and methylene blue adsorption value is19.0 mL/0.1 g.Specific surface area is 1761.16 m~2/g,containing carboxyl,phenol,ether,amine and other hydrophilic groups.It is recognized a kind of microporous activated carbon.AC prepared from pepper straw by KOH activation method has a good adsorption performance and provides reference frame for the resource utilization of pepper straw.
Biomass activated carbon(AC)of pepper straw was prepared through the method of KOH activation.Activation temperature,activation time,ratio of carbon and impregnation time were taken into account as the influencing factors by the orthogonal experiment.And the adsorption of iodine and methylene blue were two indicators for adsorption performance of AC.Then the optimum conditions for preparing AC were obtained.Structure and physicochemical properties of the composites were characterized.This results show that the optimum conditions for the preparation of AC by KOH activation method are activation temperature of 800℃,activation time of 100 min,carbon/agent ratio of 3 and immersion time of 20 h.Under this condition,the iodine adsorption value of AC is 1348.44 mg/g and methylene blue adsorption value is19.0 mL/0.1 g.Specific surface area is 1761.16 m~2/g,containing carboxyl,phenol,ether,amine and other hydrophilic groups.It is recognized a kind of microporous activated carbon.AC prepared from pepper straw by KOH activation method has a good adsorption performance and provides reference frame for the resource utilization of pepper straw.
引文
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[3]田童.新疆棉花秸秆资源化的潜力研究[D].新疆:新疆农业大学,2016.
[4] Yuhe Cao,Keliang Wang,Xiaomin Wang,et al.Hoefelmeyer,Parashu Ram Kharel,Maheshwar Shrestha.Hierarchical Porous Activated Carbon for Supercapacitor Derived from Corn Stalk Core by Potassium Hydroxide Activation[J].Electrochimica Acta,2016,212:839~847.
[5]卢辛成,蒋剑春,孙康,等.磷酸活化稻秆制备中孔活性炭的研究[J].林产化学与工业,2013,33(4):43~47.
[6] Peifang Wang,Chuangfei Wu,Yong Guo,et al.Experimental and Theoretical Studies on Methylene Blue and Methyl orange Sorption by Wheat Straw-derived Biochar with a Large Surface Area[J].Physical Chemistry Chemical Physics,2016,18(43):30196~30203.
[7]吴翠,吴小兰,高云芳,等.单分散氧化铅掺杂稻壳活性炭的制备及析氢行为[J].材料科学与工程学报,2017,35(2):215~218;236.
[8] Wenlong Li,Tuerdi Wumaier,Mingde Chen,et al.Effect of the Gradient ConstantTemperatureontheElectrochemical Capacitance of Cotton Stalk-based Activated Carbon[J].Journal of Solid State Electrochemistry,2016,20(8):1~7.
[9]周向阳,耿振,张存满,告诉.生物质活性炭的微结构调控及其储氢性能研究[J].功能材料,2016,47(3):3001~3006.
[10]周凤羽.基于生物质的纳米孔碳复合材料的制备及电容性能研究[D].上海:上海交通大学,2015.
[11] Alberto Castro-Muniz,Fabian Suarez-Garcia,Amelia MartinezAlonso,et al.Activated Carbon Fibers with a High Content of Surface Functional Groups by Phosphoric Acid Activation of PPTA[J].Journal of Colloid and Interface Science,2011,361(1):307~315.
[12]毛宇,马承愚,范艺苑,等.废弃辣椒秸秆高比表面积活性炭的制备及表征[J].应用化工,2012,41(5):766~770.
[13] Qiaoxia Li,Qunjie Xu,Xiaojin Zhou,et al.Preparation and Electrochemical Research of Anode Catalyst PtRuNi/C for Direct Methanol Fuel Cell[J].Journal of Biobased Materials&Bioenergy,2013,7(4):525~528.
[14]李栋,汪印,杨娟,等.生物质和煤基活性炭制备过程的活化特性比较[J].化工学报,2013,64(9):3338~3347.
[15] T.V.Ojumu,O.A.Ogunkunle.Production of Glucose from LignocellulosicunderExtremelyLowAcidandHigh Temperature in Batch Process,Auto-hydrolysis Approach[J].Joural of Applied Seienees,2005,5(1):15~17.
[16]辛善志.基于组分的生物质热分解及交互作用机制研究[D].武汉:华中科技大学,2014.
[17]邢宝林,谌伦建,张传祥,等.KOH活化法制备褐煤基活性炭的活化机理研究[J].中国矿业大学学报,2014(6):1038~1045.
[18]曹学飞.木质纤维组分分离、衍生化及热化转化研究[D].广州:华南理工大学轻工与食品学院,2015.
[19] M.Gineys,R.Benoit,N.Cohaut,et al.Behavior of Activated Carbon Cloths Used as Electrode in Electrochemical Processes[J].Chemical Engineering Journal,2017,310:1~12.
[20]翁诗甫.傅里叶变换红外光谱分析[M].第二版.北京:化学工业出版社,2010:291~338.