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Language: English

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received August 21, 2012
Accepted May 21, 2013

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Regeneration dynamics of potassium-based sediment sorbents for CO2 capture

Li-wei Wang Yong-fa Diao^† Lin-lin Wang Xiao-fang Shi Xiao-yan Tai

School of Environment Science and Engineering, Donghua University, Shanghai 201620, China

Korean Journal of Chemical Engineering, August 2013, 30(8), 1631-1635(5), 10.1007/s11814-013-0090-z

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Abstract

Simulating regeneration tests of Potassium-Based sorbents that supported by Suzhou River Channel Sediment were carried out in order to obtain parameters of regeneration reaction. Potassium-based sediment sorbents have a better morphology with the surface area of 156.73 m2·g^(-1), the pore volume of 357.5×10^(-3) cm3·g^(-1) and the distribution of pore diameters about 2-20 nm. As a comparison, those of hexagonal potassium-based sorbents are only 2.83 m2g^(-1), 7.45×10^(-3)cm3g^(-1) and 1.72-5.4 nm, respectively. TGA analysis shows that the optimum final temperature of regeneration is 200 and the optimum loading is about 40%, with the best heating rate of 10 ℃·min^(-1). By the modified Coats-Redfern integral method, the activation energy of 40% KHCO3 sorbents is 102.43 kJ·mol^(-1). The results obtained can be used as basic data for designing and operating CO2 capture process.

Keywords

CO2 Capture Potassium-based Sediment Sorbents Regeneration Dynamics Analysis Mechanism

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