改性生物质活性炭对甲醛气体吸附性能
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摘要
以山核桃壳作为碳质材料制备生物质活性炭,分别利用磷酸与氨水对生物质活性炭进行改性处理,获得改性生物质活性炭。研究了酸改性生物质活性炭和碱改性生物质活性炭对甲醛吸附性能的影响,对改性生物质活性炭进行了表征分析。结果表明:利用磷酸对生物质活性炭进行改性,其甲醛吸附性能大幅提高,当磷酸与山核桃壳超微粉的质量比为1.5∶1时,酸改性生物质活性炭对甲醛的吸附性能最优,即甲醛吸附效率为44.5%。酸改性生物质活性炭的层状结构明显,其颗粒之间形成了大量结构清晰且明显的不同形状孔隙。酸改性生物质活性炭有利于提高表面极性,改善粒径分布,增加比表面积。
Walnut shell was used as raw material to prepare biomass activated carbon, which was modified by phosphoric acid and ammonia water, respectively, to obtain modified biomass activated carbon. The effects of acid-modified biomass activated carbon on formaldehyde adsorption performance, and alkali-modified biomass activated carbon on formaldehyde adsorption performance were studied. Meanwhile, Characterization of acid-alkali modified biomass activated carbon was analyzed. The results show that the formaldehyde adsorption performance of activated carbon modified by phosphoric acid is greatly improved. When the mass ratio of phosphoric acid to pecan shell superfine powder is 1.5∶1, the adsorption performance of activated carbon modified by acid is the best, that is, the formaldehyde adsorption efficiency is 44.5%. The layered structure of acidmodified biomass activated carbon is obvious, and a large number of clear and distinct pores are formed between its particles. Acid-modified biomass activated carbon can improve surface polarity, particle size distribution and specific surface area.
Walnut shell was used as raw material to prepare biomass activated carbon, which was modified by phosphoric acid and ammonia water, respectively, to obtain modified biomass activated carbon. The effects of acid-modified biomass activated carbon on formaldehyde adsorption performance, and alkali-modified biomass activated carbon on formaldehyde adsorption performance were studied. Meanwhile, Characterization of acid-alkali modified biomass activated carbon was analyzed. The results show that the formaldehyde adsorption performance of activated carbon modified by phosphoric acid is greatly improved. When the mass ratio of phosphoric acid to pecan shell superfine powder is 1.5∶1, the adsorption performance of activated carbon modified by acid is the best, that is, the formaldehyde adsorption efficiency is 44.5%. The layered structure of acidmodified biomass activated carbon is obvious, and a large number of clear and distinct pores are formed between its particles. Acid-modified biomass activated carbon can improve surface polarity, particle size distribution and specific surface area.
引文
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[3]HSU N Y,CHEN P Y,CHANG H W,et al.Changes in profiles of airborne fungi in flooded homes in southern Taiwan after Typhoon Morakot[J].Science of the Total Environment,2011,409(9):1677-1682.
[4]LEE B J,KIM J,HYEON T.Recent progress in the synthesis of porous carbon materials[J].Advanced Materials,2006,18(6):2073-2094.
[5]ZHANG X L,ZHANG Y,WANG S S,et al.Effect of activation agents on the surface chemical properties and desulphurization performance of activated carbon[J].Science China Technological Sciences,2010,53(9):2515-2520.
[6]张浩,黄新杰,宗志芳,等.基于吸附性能的生物质基多孔活性炭制备方案的响应面法优化[J].材料工程,2017,45(6):67-72.
[7]张浩.基于傅里叶红外光谱的生物质环境协调功能材料制备机理及性能研究[J].光谱学与光谱分析,2017,37(2):412-415.
[8]何元渊,祁彩菊,仲万军,等.核桃壳质负载纳米零价铁吸附废水中的Pb2+[J].精细化工,2014,31(4):480-485.
[9]韩彬,周美华,荣达.稻草秸秆活性炭的制备及其表征[J].农业环境科学学报,2009,28(4):828-832.
[10]KARAIPKLI A,SARI A.Capric-myristic acid/expanded perlite composite as form-stable phase change material for latent heat thermal energy storage[J].Renewable Energy,2008,33(12):2599-2605.
[11]FANG N J,GUO J X,SHU S,et al.Influence of textures,oxygencontaining functional groups and metal species on SO2,and NO removal over Ce-Mn/NAC[J].Fuel,2017,202:328-337.
[12]YAO G H,GUI K T,WANG F.Low-temperature De-NOx by selective catalytic reduction based on iron-based catalysts[J].Chemical Engineering&Technology,2010,33(7):1093-1098.
[13]JIE D,QIN Z,ZHANG S.Catalytic efficiency of iron oxides in decomposition of H2O2,for simultaneous NOx,and SO2,removal:Effect of calcination temperature[J].Journal of Molecular Catalysis A:Chemical,2014,393(18):222-231.
[14]SUN Y,WEBLEY P A.Preparation of activated carbons from corncob with large specific surface area by a variety of chemical activators and their application in gas storage[J].Chemical Engineering Journal,2010,162:883-892.
[15]SUN K,JIANG J C.Preparation and characterization of activated carbon from rubber-seed shell by physical activation with steam[J].Biomass and Bioenergy,2010,34:539-544.
[16]ZABIHI M,AHMADPOUR A,ASL A H.Removal of mercury from water by carbonaceous sorbents derived from walnut shell[J].Journal of Hazardous Materials,2009,167(1/2/3):230-236
[17]GB 18580-2017室内装饰装修材料人造板及其制品中甲醛释放量[s].
[18]张浩.基于光催化性能的Cu-Ce/Ti O2湿性能[J].材料工程,2018,46(1):114-118.