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氨基硅烷修饰的SBA-15用于CO2的吸附
引用本文:王林芳,马磊,王爱琴,刘茜,张涛.氨基硅烷修饰的SBA-15用于CO2的吸附[J].催化学报,2007,28(9):805-810.
作者姓名:王林芳  马磊  王爱琴  刘茜  张涛
作者单位:中国科学院大连化学物理研究所,辽宁大连,116023
摘    要:以3-丙胺基三乙氧基硅烷(APTES)为硅烷化试剂,分别采用后修饰法和一步嫁接法将其嫁接到SBA-15的孔内,形成了功能化的介孔分子筛用于CO2吸附.利用X射线衍射和氮气物理吸附等方法考察了嫁接前后SBA-15的孔结构变化,用静态吸附天平考察了不同温度和不同分压下CO2的吸附行为.实验结果表明,一步嫁接法比后修饰法更有利于实现APTES在SBA-15上的嫁接.与传统的活性炭吸附剂相比,该种介孔分子筛更有利于较低分压下CO2的吸附脱除.

关 键 词:SBA-15分子筛  表面修饰  一步嫁接法  后修饰法  二氧化碳  吸附
文章编号:0253-9837(2007)09-0805-06
修稿时间:2007-02-09

CO2 Adsorption on SBA-15 Modified by Aminosilane
WANG Linfang,MA Lei,WANG Aiqin,LIU Qian,ZHANG Tao.CO2 Adsorption on SBA-15 Modified by Aminosilane[J].Chinese Journal of Catalysis,2007,28(9):805-810.
Authors:WANG Linfang  MA Lei  WANG Aiqin  LIU Qian  ZHANG Tao
Institution:Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian 116023, Liaoning , China
Abstract:By grafting amines onto the mesoporous support SBA-15,a highly efficient adsorbent has been obtained.This material shows potential applications in the removal of CO2 from enclosed areas such as space shuttles and submarines.SBA-15 was modified with 3-aminopropyl-triethoxysilane(APTES) by post-synthesis silylation and one-step silylation methods using ethanol as the solvent.The physical properties of these adsorbents were characterized by X-ray powder diffraction and N2 adsorption-desorption.The ordered hexagonal mesoporous structure of SBA-15 is well preserved after the modification.CO2 adsorption was tested using a static adsorption equipment.Adsorption isotherms demonstrate that the one-step silylation method is better than the post-synthesis silylation method.SBA-15 that was modified with APTES through one-step silylation can adsorb 34.2 mg/g of CO2 at room temperature when the partial pressure of CO2 is 0.005 MPa.Active carbon,the traditional adsorbent of CO2,was also tested.At room temperature,modified SBA-15 shows better performance than active carbon when the partial pressure of CO2 is lower than 0.02 MPa.
Keywords:SBA-15  surface modification  one-step silylation  post-synthesis silylation  carbon dioxide  adsorption
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