Chemical Research in Chinese Universities ›› 2017, Vol. 33 ›› Issue (4): 666-671.doi: 10.1007/s40242-017-6340-6

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Effect of Amine Structure on CO2 Capture Performance of Amine-modified SBA-15

TANG Qiuping, JIANG Wei, HU Gengshen   

  1. College of Engineering and Chemistry, Zhejiang Normal University, Jinhua 321004, P. R. China
  • Received:2016-08-08 Revised:2016-12-24 Online:2017-08-01 Published:2017-03-13
  • Contact: JIANG Wei, HU Gengshen E-mail:jiangwei@zjnu.edu.cn;gshu@zjnu.edu.cn
  • Supported by:

    Supported by the Natural Science Foundation of Zhejiang Province,China(Nos.LQ13G020010,LY16B070001) and the National Natural Science Foundation of China(No.21203167).

Abstract:

To investigate the relative CO2 capture performance of "molecular basket" type solid amine sorbents with varying amine structural characteristics, two model amine isomers, triethylenetetramine(TETA) and tris(2-aminoethyl)-amine(TAEA), were chosen alongside mesoporous silica SBA-15 as a support. The CO2 capture performance of each amine derivative was evaluated using a breakthrough method with a fixed-bed reactor. The results show that, in the absence of moisture, the SBA-TETA sorbents show better CO2 capture performance than the SBA-TAEA sorbents; on the other hand, in the presence of moisture, the SBA-TAEA sorbents show slightly improved uptake compared to the SBA-TETA sorbents. The tertiary amine groups, such as those found on TAEA, are known to be un-reactive with CO2 in the absence of moisture, but is activated in the presence of moisture may account for these findings.

Key words: CO2 capture, Mesoporous silica, Moisture