Preparation of 13X zeolite by coal fly ash for adsorption of volatile organic compounds

被引：0
|
作者：
Zhu T. [1 ]
Han Y. [1 ]
Niu W. [1 ]
Xue Z. [1 ]
Wang L. [1 ]
机构：
[1] School Of Chemical And Environmental Engineering, China University Of Mining And Technology-Beijing, Beijing
来源：
Meitan Kexue Jishu/Coal Science and Technology (Peking) | 2021年 / 49卷 / 07期
关键词：
13x zeolite; Adsorption performance of volatile organic compouads; Aluminum residue; Coal fly ash; Si/al ratio;
D O I：
10.13199/j.cnki.cst.2021.07.030
中图分类号：
学科分类号：
摘要：
Coal fly ash is a large amount of industrial solid waste, which greatly harms the natural environment and human physical and mental health. How to use it efficiently and at a high value is a scientific and technical problem facing us.Volatile organic compouads are a type of volatile organic pollutants that have a " three effects" effect on the human body. Molecular sieve is widely used in many fields be¬cause of its unique pore structure, excellent ion exchange, catalysis and adsorption performance. The 13X zeolite was prepared by alkali fu¬sion activation combined hydrothermal synthesis by the coal fly ash in the experiment. The factors of Si/A1 ratio, alkalinity and crystalliza¬tion time were analyzed in the preparation of 13X zeolite. The VOCs adsorption properties of 13X zeolite and activated carbon were investi¬gated. XRD,SEM and BET are used to characterize the structure of molecular sieve crystal form,larger surface area and pore size. It was found that 13X zeolite is of good crystallinity and high purity by XRD,SEM,EDX and chemical composition analysis. The particle size ran- ges from 1 to 3 |xm which is almost uniform. The BET specific surface area reaches 990.3 m~/g and the total pore volume is about 0.72 cmVg. The average pore diameter is 1.1 nm. The type of zeolite was influenced by the Si/Al ratio. The crystallization rate is accelerated and the crystallization time is shortened by increasing the alkalinity, which promote the polycondensation reaction of silicate with aluminate ions. Zeolite are generated quickly during the crystallization stage. It was found that the VOCs adsorption capacity of 13X zeolite is higher than that of activated carbon. The greater the polarity of VOCs molecules,the higher the adsorption capacity. Through the research in this paper, it not only achieves the purpose of "treating waste with waste,turning waste into treasure" between solid waste and waste gas,but also provides i- deas for low-cost and efficient synthesis of zeolite molecular sieve. At the same time,it improves the utilization of bulk solid waste,and explores the synthesis of molecular sieve. The conditions in turn provide technical and theoretical support for the industrial application of molecular sieves. © 2021 China Coal Society. All Rights Reserved.
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页码：216 / 222
页数：6
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共 14 条
  • [1] ZHANG Ling, PENG Yuexin, ZHANG Juan, Et al., Adsorptive and catalytic properties in the removal of volatile organic compounds over zeolite - based materials [ J], Chinese Journal of Catalysis, 37, 6, pp. 800-809, (2016)
  • [2] ZHANG B, CHEN Y, WEI L, Et al., Preparation of molecular sieve X from coal fly ash for the adsorption of volatile organic compounds [J], Microporous & Mesoporous Materials, 156, 8, pp. 36-39, (2012)
  • [3] CLAUDIA B, FRANCESCO C, SPARTACO D G, Et al., Removal of Mn from aqueous solution using fly ash and its hydrothermal syn?
  • [4] CHEN Yanguang, YU Fengming, Progress on preparation of X zeo? lite utilization by fly ash[J], Bulletin of the Chinese Ceramic Soci? ety, 34, 3, pp. 727-732, (2015)
  • [5] ZHANG Liping, FU Keming, Influence analysis of Si/Al on species of synthesizing zeolites with hydrothermal method from fly ash, Bulletin of the Chinese Ceramic Society, 29, 4, pp. 940-943, (2010)
  • [6] SEO S, KIM H, PARK M, Et al., Synthesis and structural refin? ement of fully dehydrated fully Zn 2+ exchanged zeolite Y (FAU), | Zn 35.5 | (Si 121 Al 71 O 384) -FAU[ J], Journal of Porous Materials, 18, 1, pp. 47-56, (2011)
  • [7] HARTMANN A, PETROV V, BUHL J C, Et al., Zeolite Synthesis un? der Insertion of Silica rich filtration residues from industrial wastewater reconditioning[J], Advances in Chemical Engineering & Science, 4, 2, pp. 120-134, (2014)
  • [8] KONG Deshun, SONG Shuojiang, WANG Qian, Et al., Preparation of p-type molecular sieve from fly ash by alkali melting and hy? drothermal method[J], Bulletin of the Chinese Ceramic Society, 35, 3, pp. 922-926, (2016)
  • [9] ZHOU Huiyun, XU Tingting, CHEN Yanguang, Et al., Preparation of pure nap zeolite by using flying Ash[ J], Chinese Journal of Environmental Engineering, 10, 1, pp. 360-364, (2016)
  • [10] LI P, LIU L, XIONG G., Effect of zeolite precursor on the formation of MCM-41 molecular sieve containing zeolite Y building units [J], Physical Chemistry Chemical Physics, 13, 23, pp. 11248-11253, (2011)
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