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多级孔硅铝酸盐的结构特性及其除湿性能 被引量:2

Structural property and dehumidification performance of hierarchically porous aluminosilicates
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摘要 采用水热法制备出具有深度除湿功能(RH<20%)、高饱和吸附量和中低温快速脱附性能(<100℃)的除湿轮用多级孔硅铝酸盐吸附剂。采用N2-吸附脱附、XRD、透射电镜、FT-IR和NMR等技术表征吸附剂的微观结构;采用动态水汽吸附分析仪(DVS)测试其吸附-脱附性能。结果发现,通过控制制备前体的微晶温度,可调控吸附剂在中低湿度工况下的除湿性能:微晶温度是通过影响吸附剂微观结构中有序介孔和类微孔结构的比例,来影响吸附剂的深度除湿功能;升高微晶温度会提高吸附剂中类微孔和骨架Al比例从而强化其深度除湿能力,但会显著降低介孔有序度及总孔容,削弱其饱和吸附量及脱附性能;过高的类微孔和骨架Al比例会提高吸附剂的脱附再生温度,增大除湿能耗。 Hierarchically porous aluminosilicate with high adsorption capacity and fast desorption kinetics was synthesized via hydrothermal method.Samples under different pre-crystallization temperature were synthesized.It was revealed that the excellent performance of adsorbents was attributed to its unusual pore texture.The adsorbents were characterized by N2 physisorption,XRD,TEM,FT-IR and NMR.The water vapor adsorption-desorption isotherms were measured on a dynamic vapor sorption system(DVS).The results of characterization showed that the adsorbent framework consisted of ordered mesoporous with microporous-like pits.As the pre-crystallization temperature raised,the proportion of microporous-like pits increased and the deep dehumidification performance was improved as more Al substituted in the framework.However,the amount of ordered mesopore and total pore volume decreased,leading to lower saturated adsorption capacity and water-desorbed percent.The hierarchically porous aluminosilicate showed its advantages for rotary dehumidifiers with deep dehumidification performance(relative humidification,RH = 15%,200 mg·g-1),high saturated adsorption capacity(RH = 40%,400 mg·g-1) and fast desorption kinetics under low desorption temperature(87℃).
出处 《化工学报》 EI CAS CSCD 北大核心 2016年第7期2864-2873,共10页 CIESC Journal
基金 国家自然科学基金(NSFC)-广东省人民政府联合基金项目(U1034005)~~
关键词 硅铝酸盐 吸附剂 合成 多孔介质 微晶温度 除湿性能 aluminosilicates adsorbents synthesis porous media pre-crystallization temperature dehumidification performance
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  • 1ZHENG X, GET S, WANG R Z. Recent progress on desiccant materials for solid desiccant cooling systems [J]. Energy, 2014, 74 (5): 280-294.
  • 2李鑫,李忠,夏启斌.CaCl_2/LiCl改性中孔硅胶的吸附/脱附性能[J].华南理工大学学报(自然科学版),2006,34(8):13-17. 被引量:15
  • 3LI X, LI Z, XIA Q B. Adsorption/desorption properties of mesoporous silica gel modified with CaCI2/LiC1 [J]. Journal of South China University of Technology: Natural Science Edition, 2006, 24 (8): 13-17.
  • 4WEI X L, WANG W L, XIAO J, et al. Hierarchically porous aluminosilicates as the water vapor adsorbents for dehumidification [J]. Chemical Engineering Journal, 2013,228:1133-1139.
  • 5LI X, NARAYANAN S, MICHAELIS V K, et al. Zeolite Y adsorbents with high vapor uptake capacity and robust cycling stability for potential applications in advanced adsorption heat pumps [J]. Microporous & Mesoporous Materials, 2015, 201: 151-159.
  • 6WANG L W, WANG R Z, OLIVEIRA R G. A review on adsorption working pairs for refrigeration [J]. Renewable & Sustainable Energy Reviews, 2009, 13 (3): 518-534.
  • 7FANG Y T, LIU T, ZHANG Z C, et al. Silica gel adsorbents doped with A1, Ti, and Co ions improved adsorption capacity, thermal stability and aging resistance [J]. Renewable Energy, 2014, 63 (1): 755-761.
  • 8ZHENG X, GE T S, HU L M, et al. Development and characterization of mesoporous silicate-LiCl composite desiccants for solid desiccant cooling systems [J]. Ind. Eng. Chem. Res., 2015, 54 (11): 2966-2973.
  • 9BATTEN S R, CHAMPNESS N R, CHEN X M, et al. Terminology of metal-organic frameworks and coordination polymers [J]. Pure & Applied Chemistry, 2013, 85 (8): 1715-1724.
  • 10MUELLER U, SCHUBERT M, TEICH F, et al. Metal-organic frameworks-prospective industrial applications [J]. J. Mater. Chem., 2006, 16 (7): 626-36.

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