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硅酸盐通报 ›› 2016, Vol. 35 ›› Issue (9): 2798-2803.

• • 上一篇    下一篇

四乙烯五胺功能化有序介孔氧化铝的合成及其CO2选择吸附性能研究

蒋晓萍;周钰;许琦   

  1. 盐城工学院化学化工学院,盐城 224051; 常州大学材料科学与工程学院,常州 213164;盐城工学院化学化工学院,盐城,224051
  • 出版日期:2016-09-15 发布日期:2021-01-18
  • 基金资助:
    科技部2016年国家重点研发计划(JFYS2016ZY01003568)

Synthesis of TEPA-functionalized Organized Mesoporous Alumina and Their Selective Adsorption of CO2

JIANG Xiao-ping;ZHOU Yu;XU Qi   

  • Online:2016-09-15 Published:2021-01-18

摘要: 以九水硝酸铝为铝源,非表面活性剂柠檬酸为模板剂,稀氨水为沉淀剂合成有序介孔氧化铝( OMA)。以四乙烯五胺( TEPA)为活性组分,采用物理浸渍将其负载到OMA的内孔及比表面上,制备出氨基功能化的OMA用于CO2的选择吸附研究。采用XRD、BET和TEM对合成的吸附剂进行表征,通过自制的固定床反应器测量穿透曲线的方法研究其对CH4/CO2混合气的吸附分离性能。分别考察了负载量和吸附温度对吸附性能和分离因子的影响。结果表明,TEPA负载量为50%的吸附剂、吸附温度为70℃时对CO2吸附量最大,为2.598 mmol/g,TEPA/OMA经过10次吸附-脱附循环后,其吸附性能变化较小,仅下降了8.65%,具有较好的循环稳定性。

关键词: 有序介孔氧化铝;四乙烯五胺;CO2;吸附性能;分离因子

Abstract: Organized mesoporous alumina (OMA) was synthesized by Al(NO3)3· 9H2O, non-surfactant CA was used as template , dilute ammonia as precipitating agent .Solid amine adsorbents were prepared by introducing tetraethylenepentamine ( TEPA ) into OMA by physical impregnation method for CO 2 capture.The synthesized adsorbents were charactered by XRD , N2 adsorption-desorption and TEM .The adsorption separation properties of CH 4/CO2 were discussed by means of breakthrough curve analysis in self-made fixed bed and the effects of TEPA loadings and adsorption temperatures were investigated .The results show that the maximal adsorption capacities are 2 .598 mmol/g achieved as 50% TEPA loadings and 70 ℃ adsorption temperature.In addition, after ten cyclic adsorption-desorption tests, the CO2 adsorption capacity changes a little , just decreases about 8.65%, demonstrating the TEPA/OMA adsorbent displays am excellent regenerability .

Key words: organized mesoporous alumina;TEPA;CO2;adsorption property;separation factor

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