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Study on C02 Absorption in Single MEA and Mixed MEA & DEA

Foo, Lee Lian (2005) Study on C02 Absorption in Single MEA and Mixed MEA & DEA. universiti teknologi petronas. (Unpublished)

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Abstract

Theoverall effect of greenhouse warming caused by increasing amount of carbon dioxide (CO2) in the atmosphere has lead to growing interest in research for new methods to reduce the C02 emissions. One such alternative is to recover C02 from flue gas by chemical absorption with alkanolamines, which can be then used for CO2 sequestration. Alkanolamines have long been used for removing CO2 and hydrogen sulfide (H2S) from natural gas streams. The classes of alkanolamines are divided into primary amines (monoethanolamine, MEA), secondary amines (diethanolamine, DEA) and tertiary amines (monodiethanolamine, MDEA). The objectives of this study are to study the effect of solvent flow rate and amine concentration in effective CO2 removal as well as to recommend optimum percentage of mixed primary and secondary amines for efficient C02 absorption. The use of mixture of primary and secondary amines would maximize the individual properties of the single amines. The experiment was conducted in a wetted wall gas absorption column with variousMEA concentrations, varying solvent flow rate and varying mixtures of amines. From the experiment, the effect of increasing solvent flow rate would lead to overall better CO2 removal. For solvent concentration, an increase of amine concentration would increase the maximum overall CO2 removal efficiency. The optimum blend of amines from this study is reported as DEA-25wt% and MEA-10.2wt% based on the maximum total moles of C02 effectively removed with this blend. From this study, the main factor which drives the C02 absorption process in a mixed amine system is the concentration of MEA in the mixture. A decrease in MEA concentration would lead to a decrease in the total moles of CO2 removed.

Item Type: Final Year Project
Academic Subject : Academic Department - Chemical Engineering - Separation Process
Subject: T Technology > TP Chemical technology
Divisions: Engineering > Chemical
Depositing User: Users 2053 not found.
Date Deposited: 30 Sep 2013 16:55
Last Modified: 25 Jan 2017 09:46
URI: http://utpedia.utp.edu.my/id/eprint/7936

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