羊栖菜基中孔活性炭的制备及工艺优化
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摘要
以羊栖菜生物炭为原料,采用CO2物理活化法制备中孔活性炭。应用响应曲面中心组合法设计实验,考察了活化温度、活化时间及CO2流量对制备的活性炭吸附亚甲基蓝的影响及其交互作用,并采用N2吸附脱附对所制备的活性炭进行表征。结果表明,当活化温度为900℃,活化时间为30 min,CO2流量为1.8 L/min时,制备的活性炭的比表面积为1 329 m2/g,其对亚甲基蓝的吸附值高达235 mg/g,总孔体积为1.176 9 m L/g,中孔率为65%。
Mesoporous activated carbon has been prepared with Sargassum fusiforme biochar as raw materials by CO2 physical activation. The experiments have been designed by response surface central composite method and the influences of activated temperature,activated time,CO2 flow rate on the adsorption of the prepared activated carbon for methylene blue(MB) and its interaction investigated. The prepared activated carbon is to be characterized by nitrogen adsorption-desorption method. The results show that when activated temperature is 900 ℃,activated time 30 min,and CO2 flow rate 1.8 L/min,the BET specific surface area of the prepared activated carbon,adsorption value for methylene blue,total pore volume,and mesopore rate are 1 329 m2/g,235 mg/g,1.176 9 m L/g,and 65%,respectively.
Mesoporous activated carbon has been prepared with Sargassum fusiforme biochar as raw materials by CO2 physical activation. The experiments have been designed by response surface central composite method and the influences of activated temperature,activated time,CO2 flow rate on the adsorption of the prepared activated carbon for methylene blue(MB) and its interaction investigated. The prepared activated carbon is to be characterized by nitrogen adsorption-desorption method. The results show that when activated temperature is 900 ℃,activated time 30 min,and CO2 flow rate 1.8 L/min,the BET specific surface area of the prepared activated carbon,adsorption value for methylene blue,total pore volume,and mesopore rate are 1 329 m2/g,235 mg/g,1.176 9 m L/g,and 65%,respectively.
引文
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[2]胡敏,于凤文,洪机剑,等. 5种生物质基本性质分析[J].西北林学院学报,2017,32(3):52-55.
[3] Pereir R G,Veloso C M,Silva N M,et al. Preparation of activated carbons from cocoa shells and siriguela seeds using H3PO4and ZnCl2as activating agents for BSA andα-lactalbumin adsorption[J]. Fuel Process Technol.,2014,126:476-486.
[4] Nath K,Panchani S,Bhakhar M S,et al. Preparation of activated carbon from dried pods of Prosopis cineraria with zinc chloride activation for the removal of phenol[J]. Environmental Science&Pollution Research,2013,20(6):4030-4045.
[5] Alvarez J,Lopez G,Amutio M,et al. Physical activation of rice husk pyrolysis char for the production of high surface area activated carbons[J]. Industrial&Engineering Chemistry Research,2015,54(29):7241-7250.
[6] Tanaka S,Fujimoto H,Denayer J F M,et al. Surface modification of soft-templated ordered mesoporous carbon for electrochemical supercapacitors[J]. Microporous&Mesoporous Materials,2015,217:141-149.
[7]郝丽娜,解强,兰廷,等.金属盐催化制备煤基中孔活性炭的研究[J].炭素技术,2008,27(4):26-29.
[8] Yang Juan,Qiu Keqiang. Development of high surface area mesoporous activated carbons from herb residues[J]. Chemical Engineering Journal,2011,167(1):148-154.
[9] Nelson K M,Mahurin S M,Mayes R T,et al. Preparation and CO2adsorption properties of soft-templated mesoporous carbons derived from chestnut tannin precursors[J]. Microporous&Mesoporous Materials,2016,222:94-103.
[10]刘皓,邓保炜,陈娟,等.兰炭基中孔活性炭的制备及性能表征[J].材料导报,2016,30(10):87-90.
[11]袁翠翠. CO2活化法制备煤基微孔活性炭的研究[D].北京:中国矿业大学,2016.
[12]曾淦宁,周鸿艳,艾宁,等.高比表面积铜藻基活性炭的制备及工艺优化[J].环境科学学报,2013,33(8):2209-2217.
[13] Sun Kang,Jiang Jianchun. Preparation and characterization of activated carbon from rubber-seed shell by physical activation with steam[J]. Biomass&Bioenergy,2010,34(4):539-544.
[14] Marrakchi F,Ahmed M J,Khanda W A,et al. Mesoporous-activated carbon prepared from chitosan flakes via single-step sodium hydroxide activation for the adsorption of methylene blue[J]. International Journal of Biological Macromolecules,2017,98:233-239.
[15] Li Weiguang,Gong Xujin,Wang Ke,et al. Adsorption characteristics of arsenic from micro-polluted water by an innovative coalbased mesoporous activated carbon[J]. Bioresource Technology,2014,165(8):166-173.
[16] Dural M U,Cavas L,Papageorgious S K,et al. Methylene blue adsorption on activated carbon prepared from Posidonia oceanica(L.)dead leaves:Kinetics and equilibrium studies[J]. Chemical Engineering Journal,2011,168(1):77-85.