提高甲醛吸附速率的活性炭表面改性及评估方法
Modification and evaluation methods for activated carbon to improve formaldehyde adsorption rate
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摘要: 通过负载多羟基和胺基化合物来对活性炭表面进行官能团修饰，可提高活性炭在大风量和高空速下对甲醛污染物的吸附速率.实验考察了基炭孔结构参数，改性剂负载量，改性炭制备条件等因素对活性炭吸附甲醛性能提升的影响，并介绍了一种测定甲醛吸附速率的装置和方法，用来评估和筛选家用净化器用的活性炭.结果表明，对于四氯化碳值为76%的活性炭，采用等量浸渍的方法制备改性炭的优化条件为：空气气流下的200℃氧化处理，6%的改性剂负载量和不超过100℃的烘干处理温度.本文还通过实验验证和分析，提出和明确了此类表面改性活性炭对甲醛的吸附机理.Abstract: Activated carbons (ACs) can be modified by loading chemicals with enriched hydroxyl and amino functional groups for improving their adsorption rate to formaldehyde at a high air-flow rate or space velocity. Effects of ACs' pore structural parameters, chemical modifier loadings, and preparation conditions on the performance of modified ACs were investigated. A test method and setup were introduced in the evaluation of ACs that are installed in air-cleaners for indoors formaldehyde removal. Results showed that for ACs with CTC value of 76%, the optimized preparation conditions by the method of incipient wetness impregnation (IWI) were:200℃ for air treatment for carbon supports, 6% loading amounts of the modifier and no more than 100℃ for samples' drying. Based on the experimental results, the physical adsorption mechanism was proposed and verified.
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Key words:
- activated carbon /
- modification /
- adsorption rate /
- formaldehyde /
- evaluation
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[1] 环境保护部.国家污染物环境健康风险名录:化学第一分册[M].北京:中国环境科学出版社,2009. Ministry of environmental protection.National environmental health risk list of pollutants[M].Beijing:China Environmental Science Press,2009(in Chinese). [2] 刘长风,刘学贵,臧树良.游离甲醛消除剂的研究进展[J].辽宁化工,2004,33(6):331-334. LIU C F,LIU X G,ZANG SH L. Research development of free-formaldehyde scavenger[J].Liaoning Chemical Industry,2004,33(6):331-334(in Chinese).
[3] SURESH S, BANDOSZ T.J.Removal of formaldehyde on carbon-based materials:Areview of the recent approaches and findings[J].Carbon,2018,137:207-221. [4] HE Y B,JI H B,WANG L F. Development of the removal of indoor formaldehyde with catalytic oxidation[J].Chemical Engineering,2007, 26(8):1104-1109. [5] 孙瑶毅.甲醛有害气体治理的研究进展[J].化工科技市场,2004,4:17-20. SUN Y Y. Study on the purification of formaldehyde[J].Chemical Technology Market,2004 ,4:17-20(in Chinese).
[6] 蔡健,胡将军,张雁.改性活性炭纤维对甲醛吸附性能的研究[J].环境科学与技术,2004,27(3):16-19. CAI J,HU J J,ZHANG Y. Adsorption of formaldehyde on modified activated carbon fibers[J].Environmental Seieneeand Teehnology,2004,27(3):16-19(in Chinese).
[7] 贾建国,李闯,朱春来,等.活性炭的硝酸表面改性及其吸附性能[J].炭素技术,2009,28(6):11-15. JIA J G,LI CH,ZHU CH L, et al. Surface modification and adsorption property of activated carbon by HNO3[J].Carbon Techniques,2009,28(6):11-15(in Chinese).
[8] FALCO G D, BARCZAK M, MONTAGNARO F, et al. A new generation of surface active carbon textiles as reactive adsorbents of indoors formaldehyde[J].ACS Applied Materials & Interfaces,2018,10:8066-8076. [9] SONG Y, QIAO W M, YOON S H,et al. Removal of formaldehyde at low concentration using various activated carbon fibers[J].Journal of Applied Polymer Science,2007(106):2151-2157. [10] MA C, LI M, ZHU T. Removal of low-concentration formaldehyde in air by adsorption on activated carbon modified by hexamethylene diamine[J].Carbon,2011,49:2869-2877. [11] TANADA S, KAWASAKI N, NAKAMURA T,et al. Removal of formaldehyde by activated carbons containing amino groups[J].Journal of Colloid and Interface Science,1999(214):106-108. [12] 郭天祥,王柏鑫,苏联,等.氨基酸/甲醛聚合物噻唑烷-4-羧酸表征分析[J].化学工程与技术,2018,8(3):174-179. GUO T X,WANG B X,SUN L, et al. Characterization of polymer thiazolian-4-carboxylic acid derived from amino acid and formaldehyde[J].Hans Journal of Chemical Engineering and Technology,2018,8(3):174-179(in Chinese).
[13] 王嵬,杨立平,仪淑敏,等.9种氨基酸对甲醛的捕获能力的研究[J].氨基酸和生物资源,2015,37(2):10-13. WANG W,YANG L P,YI SH M, et al. Study on formaldehyde capture ability of nine amino acids[J].Amino Acids and Biotic Resources, 2015,37(2):10-13(in Chinese).
[14] 郑希.氨基酸型甲醛吸附材料制备及净化效果研究[J].四川环境,2017,36(1):1-5. ZHENG X. Study on Preparation of amino acid formaldehyde adsorption material and it's purification effect[J].Sichuan Environment,2017,36(1):1-5(in Chinese).
[15] KOWALCZYK P, MIYAWAKI J, AZUMA Y, et al. Molecular simulation aided nanoporous carbon design for highly efficient low-concentration formaldehyde capture[J]. Carbon,2017,124:152-160. -
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