Evaluation of CO 2 capture performance on pumice modified by TEPA
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ORIGINAL PAPER
Evaluation of CO2 capture performance on pumice modified by TEPA M. Avishan1 · S. N. Kudahi2 · A. R. Noorpoor1 Received: 7 December 2019 / Revised: 2 March 2020 / Accepted: 6 April 2020 © Islamic Azad University (IAU) 2020
Abstract Due to greenhouse gases emissions from different industries, development and implementation of new and efficient technologies such as adsorption for reduction, this amount of emissions seems necessary. Amine-modified adsorbents, because of their considerable advantages, are considered as the appropriate replacements to moderate the operational costs of adsorption. In this study, for the first time, pumice was selected to make the process of adsorption easy, economical, and eco-friendly. The CO2 adsorption capacity of three samples of raw pumice, as well as three samples modified by tetraethylenepentamine, at three different temperatures and C O2 concentrations was investigated. Among different samples, the sample from Maragheh mine had the higher CO2 adsorption capacity estimated as 0.230 mmol/g. The sample modified by 6% tetraethylenepentamine illustrated the considerable increase in CO2 adsorption capacity assessed as 0.510 mmol/g. Examining the implication of temperature on the C O2 adsorption capacity at all three temperatures of 298 K, 328 K, and 348 K indicated that the modified pumice had the higher C O2 adsorption capacity in comparison with natural pumice at 298 K. The effect of different C O2 concentrations on the C O2 capture efficiency indicted that CO2 capture at concentration equaled to 35% vol of CO2 had the highest amount calculated as 6.859 tonne/GJ. Therefore, pumice modified by tetraethylenepentamine can be used for C O2 capture at the industries which have the high concentration of CO2. Keywords CO2 adsorption capacity · CO2 capture efficiency · Pumice · The adsorbent’s cost index
Introduction Excessive use of fossil fuels has led to the emissions of great amounts of greenhouse gases, and in particular carbon dioxide (CO2) into the earth’s atmosphere. The effects of the significant and continuous rise in the amount of CO2 on global warming have been accepted by international communities, and coping with this ever-increasing issue has become a major global concern (Yaumi et al. 2017; Min et al. 2017; Zhao et al. 2017; Liu and Kuok 2018). Therefore, in line with the need to develop and put into practice new and effective technologies to decrease the C O2 emissions, numerous efforts have been made to do so through carbon capture and
Editorial responsibility: M. Abbaspour. * A. R. Noorpoor [email protected] 1
School of Environment, College of Engineering, University of Tehran, Tehran, Iran
Environment Research Department, Niroo Research Institute, Shahrak‑e‑ Ghods, P.O. Box 14665/517, Tehran, Iran
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storage (CCS) (Ma et al. 2017; Sanna and Maroto-Valer 2016; Ojeda et al. 2017). Since there has been no technology solution to reduce the CO2 emissions, especially in energy sector, and key industries, such as steel, cement,
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