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Issue 45, 2013
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Mesoporous TiO2 as the support of tetraethylenepentamine for CO2 capture from simulated flue gas

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Abstract

Mesoporous TiO2 (MT) was prepared by a hydrothermal method and used as the supporting material for the immobilization of tetraethylenepentamine (TEPA) to develop a new type of adsorbent for CO2 capture from flue gas. The CO2 adsorption capacity increases with the increase of the TEPA loading amounts. With the maximum TEPA loading of 31 wt% onto the MT sorbent, the maximum CO2 adsorption capacity reached 2.52 mmol of CO2 g−1 of sorbent. In the presence of an appropriate amount of water vapor, the formation of bicarbonate and hydroxylated surface on TiO2 can improve CO2 adsorption capacity from 2.64 to 2.91 mmol g−1. However, an excess of water vapor leads to a decrease in the CO2 adsorption capacity from 2.91 to 2.65 mmol g−1, probably attributed to the adsorption competition between water and CO2. The absorption/regeneration cycle was repeated and the CO2 adsorption capacity decreased from 2.52 to 2.41 mmol g−1 over 5 cycles, almost completely maintained its original CO2 adsorption capacity. In addition, the effect of long-term storage on CO2 adsorption capacity is studied. After approximately one year of storage, the CO2 capacity of the MT–TEPA-31 decreased by 28% compared with the fresh sample.

Graphical abstract: Mesoporous TiO2 as the support of tetraethylenepentamine for CO2 capture from simulated flue gas

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Publication details

The article was received on 15 Jun 2013, accepted on 01 Oct 2013 and first published on 02 Oct 2013


Article type: Paper
DOI: 10.1039/C3RA42998A
Citation: RSC Adv., 2013,3, 23785-23790
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    Mesoporous TiO2 as the support of tetraethylenepentamine for CO2 capture from simulated flue gas

    F. Song, Q. Zhong, J. Ding, Y. Zhao and Y. Bu, RSC Adv., 2013, 3, 23785
    DOI: 10.1039/C3RA42998A

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