Kinetics of absorption of carbon dioxide in aqueous piperazine solutions

Derks, P. W. J.; Kleingeld, T.; Aken, Coen van; Hogendoorn, J.A.; Versteeg, Geert

doi:10.1016/j.ces.2006.07.009

Cited by 178 publications

(156 citation statements)

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“…Under the same conditions the highest carbon dioxide absorption rate was provided by the solution based on 2-amine-2-methyl-1-propanol with an addition of piperazine. It may be assumed that the high absorption rate by this solution results from the application of a system of a fast reacting amine with steric hindrance with an addition of piperazine, the reaction rate of which is nearly 10-fold higher than that of cpe.czasopisma.pan.pl; degruyter.com/view/j/cpe monoethanolamine ( Bishnoi et al, 2000;Derks et al, 2006). It can also be seen that despite the addition of 10% piperazine, the rate of absorption of carbon dioxide in the tertiary amine (MDEA) solution is substantially lower than that in the 30% MEA solution.…”

Section: Resultsmentioning

confidence: 99%

A Selection of Amine Sorbents for CO2 Capture from Flue Gases

Wilk¹,

Więcław‐Solny²,

Śpiewak³

et al. 2015

Chemical and Process Engineering

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Amine absorption processes are widely used in the industry to purify refinery gases, process gases or natural gas. Recently, amine absorption has also been considered for CO 2 removal from flue gases. It has a number of advantages, but there is one major disadvantage -high energy consumption. This can be reduced by using an appropriate sorbent. From a group of several dozen solutions, three amine sorbents were selected based on primary, tertiary and sterically hindered amines. The solutions were used to test CO 2 absorption capacity, absorption kinetics and heat of CO 2 absorption. Additional tests were performed on the actual absorber-desorber system to indicate the most appropriate sorbent for capturing CO 2 from flue gases.

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Section: Resultsmentioning

confidence: 99%

A Selection of Amine Sorbents for CO2 Capture from Flue Gases

Wilk¹,

Więcław‐Solny²,

Śpiewak³

et al. 2015

Chemical and Process Engineering

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“…error of 0.5%) at 293K. In Figure 7, the linear correlation between the logarithm of k 2 (m 3 / mole .sec) and pKa for temperatures up to 303K for primary and secondary In Figure 8, Piperazine is much higher compared to other primary and secondary amine, as it is a cyclic amine, for which probably a different BrØnsted relationship exists (Derks, 2006). Similarly, the deviation of DETA could be due to the presence of two primary and one secondary amine group present in its molecular structure.…”

Section: Methodsmentioning

confidence: 99%

“…Therefore in Table 5, the rate constant (DeCoursey approximation) for 1,6 Hexamethylenediamine (HMDA) and 1,6 Hexamethylenediamine, N,N' di-methyl (HMDA, N,N') is shown together with results for Diethylenetriamine, DETA (Hartono et al, 2009), Ethylenediamine, EDA (Li et al, 2007), Piperazine, Pz (Derks, 2006) and Monoethanolamine, MEA . The results suggested that 1,6 Hexamethylenediamine (HMDA) and 1,6 Hexamethylenediamine,N,N,N') show significantly faster kinetics than MEA, DEA and DETA, but lower than Piperazine, which has a cyclic structure.…”

Section: Methodsmentioning

confidence: 99%

“…Due to lack of experimental diffusion coefficient data, and to avoid the influence from estimated diffusion coefficients, the rate multiplied with diffusion coefficient of CO 2 , k 2 .D CO2 is plotted in Figure 10. Piperazine correlation for second order rate constant and diffusion coefficient with temperature proposed by Derks et al 2006, is also plotted in Figure 10 for comparison.…”

Section: Effect Of Co 2 Loading On Kineticsmentioning

confidence: 99%

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Amine based solvent for CO2 absorption : from molecular structure to process

Singh¹

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Dit onderzoek werd financieel ondersteund door nationale projecten CATO Prachi Singh Amine based solvent for CO 2 absorption "From molecular structure to process". Thesis, University of Twente, The Netherlands ISBN 978-90-365-3200-6 Printed by Wöhrmann Print Service Cover Design: Painting "Green horizon" by Prachi Singh Copyright © 2011 by Prachi Singh All rights reserved. NO part of the material protected by this copyright notice may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopy, recording or by any information storage and material system, without written permission from the publisher. AMINE BASED SOLVENT FOR CO 2 ABSORPTION "FROM MOLECULAR STRUCTURE TO PROCESS" SummaryGlobal warming is a well known, worldwide concern, most probably caused by increasing concentrations of CO 2 and other greenhouse gases in the earth's atmosphere, due to human activities. Especially the production of electricity is a major contributor, responsible for 41% of the world CO 2 emissions in 2008. Worldwide, the power sector relies heavily on coal, the most carbon-intensive of fossil fuels, and hence amplifying its share in global emissions. Carbon Capture and Storage (CCS) offers the opportunity to reduce the CO 2 emissions associated with the use of fossil fuels. Carbon dioxide capture with a regenerable solvent is considered to be a mature technology, since it is successfully applied as CO 2 removal technology in industrial applications. In order to make this technology more economical for post-combustion capture, especially in the power-sector, more research is required to identify solvents which require less energy and lead to lower solvent loss-and corrosion rates in this application. In this thesis, the development of improved, energy efficient amine based solvents is targeted, through experimental (screening) work and by a further understanding of the role of molecular structure on the solvent absorption properties for amine based solvents in a CO 2 absorption process.Primary and secondary amines react with CO 2 forming carbamate-species. The degree of hydrolysis of these carbamate to form bicarbonate depends on several factors, such as its chemical stability, which is influenced by the temperature. Tertiary amines groups cannot react with CO 2 directly to form a carbamate, because these amines lack a free proton. Hence, tertiary amines act as a base and catalyze the hydration of CO 2 , leading to the formation of bicarbonate. Carbamate stability and basicity are the major parameters determining the absorption capacity and regeneration energy requirement. From literature it was identified that steric hindrance is an important parameter in reducing the carbamate stability and is also affecting the basicity of amine based solvents. Steric hindrance is present at different levels (low to high) depending on the number of functional groups substituted at α-carbon next to the amine group. Therefore, the effect of molecular structure like the carbon chain length, functional gr...

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“…In most cases, the mixtures contain N-methyldiethanolamine (MDEA) as the base amine with the addition of one or two more reactive amines such as monoethanolamine (MEA) or diethanolamine (DEA) has been widely proposed 4 . The principle of such an aqueous blend with a tertiary amine is based on the relatively high rate of reaction of CO 2 with the reactive alkanolamine combined with the low heat of reaction of CO 2 with the tertiary alkanolamine, which leads to higher rates of absorption in the absorber column 10 . Blended MDEA/MEA solutions have been widely investigated for several years 2,11,12,13 .…”

Section: Introductionmentioning

confidence: 99%

Molecular dynamic simulation of CO2 absorption into mixed aqueous solutions MDEA/PZ

Harun

Masiren

2017

Chem. Eng. Res. Bull.

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Abstract:The mixture of amine absorption process is an approach for mitigation of carbon dioxide (CO 2 ) from flue gas that produces from power plant. Several experimental and simulation studies have been undertaken to understand this process but the mechanism of CO 2 absorption into the aqueous blended amines such as MDEA/PZ is not well understood and available knowledge within the open literature is limited. The aim of this study is to investigate the intermolecular interaction of the blended MDEA/PZ using Molecular Dynamics (MD) simulation. MD simulation was run under condition 313 K and 1 atm. The thermodynamic ensemble used were 200 ps for NVE and 1 ns for NVT. The periodic boundary is used to visualize the interaction of molecules of the whole system. The simulation method also involved calculation of force field and time integration algorithm.The results were interpreted in terms of Radial Distribution Function (RDF) analysis. It was observed that the hydroxyl group (-OH) of MDEA is more attracted to water molecule compared to amino group (-NH) of MDEA. The intermolecular interaction probability of -OH and -NH group of MDEA with CO 2 in blended MDEA/PZ is higher than using pure MDEA. This finding shows that PZ molecule act as an activator to promote the intermolecular interaction between MDEA and CO 2 .Thus, blend of MDEA with PZ is expecting to increase the absorption rate of CO 2 and reduce the heat regeneration requirement.

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Kinetics of absorption of carbon dioxide in aqueous piperazine solutions

Cited by 178 publications

References 40 publications

A Selection of Amine Sorbents for CO2 Capture from Flue Gases

A Selection of Amine Sorbents for CO2 Capture from Flue Gases

Amine based solvent for CO2 absorption : from molecular structure to process

Molecular dynamic simulation of CO2 absorption into mixed aqueous solutions MDEA/PZ

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