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Energy Conservation Study in MDEA-Based C02 Removal System

Hamid, Nurul Shakira (2012) Energy Conservation Study in MDEA-Based C02 Removal System. Universiti Teknologi PETRONAS. (Unpublished)

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Abstract

Carbon dioxide (CO2) removal section in Ammonia Plant is highly energy intensive. Many developments have been made to make it more energy efficient and environmentally friendly. Absorption of carbon dioxide in an amine based solution followed by desorption is one of the best available processes to meet the specific plant conditions of high carbon dioxide purity, minimum hydrogen loss, less corrosion, low energy requirement and low capital investment. A simplified carbon dioxide removal system using methydiethanolainine (MDEA) solution have been simulated with the Aspen HYSYS process simulation tool. Analysis on the operating parameters such as the absorption temperature and pressure, and also the concentration of MDEA in lean amine solution have been performed to observe the effect of operating parameters changes on the absorption rate of carbon dioxide, reboiler duty and C02 ventilation rate. The comparative study on the structural changes of the absorption system also is being done to observe the energy performance of the system which apparently can reduce the capital investment if optimization of the energy requirement can be accomplished. Based on the base case simulation, 8278.8 kg/hr of CO2 has successfully being removed from the system with energy requirement of 10.7 MW. Increasing the temperature and pressure of the lean amine stream has decreased the CO2 absorption rate, C02 removal rate and reboiler duty. In contrast, raising the concentration ofMDEA in the lean amine solution has caused the declining of CO2 absorption rate, C02 removal rate and energy requirement of the reboiler. Subsequently, new configurations of the CO2 removal system including usage of hydraulic turbine do not contribute in reducing energy requirement ofthe system. Hence, the energy cost could not be reduced much.

Item Type: Final Year Project
Academic Subject : Academic Department - Chemical Engineering - Process System Engineering
Subject: T Technology > TP Chemical technology
Divisions: UNSPECIFIED
Depositing User: Users 2053 not found.
Date Deposited: 24 Oct 2013 14:42
Last Modified: 25 Jan 2017 09:40
URI: http://utpedia.utp.edu.my/id/eprint/9659

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