Performance study on the carbon capture efficiency using single and mixture amine
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Date
2019-06
Authors
Nursyafika Bt Mohamad Nazarudin
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Abstract
Development of coal-fired power plant to produce electricity has lead to the emission of acid gas to the atmosphere. For example, acid gases such as carbon dioxide and hydrogen sulphide which are toxic and corrosive for environment. In addition, greenhouse gas such as CO2 has effect been reported to the climate change by increasing the global temperature. To overcome, carbon capture and storage (CCS) technology in post-combustion with amine absorption is introduced to mitigate the emission of acid gases. This study was carried out by using Aspen Plus software in steady state conditions. The optimum conditions for single MEA, MDEA and mixture of MEA and MDEA flowrate, temperature and pressure in the absorber at 100kg/hr, 30°C and 1 atm. While, amine recovery rate for single MEA, MDEA and mixture of MEA and MDEA were achieved at column pressure of 2 atm and reboiler duty 26kW for both of single amine and 10 kW for mixture amine. Increased of lean amine flowrate, pressure reboiler duty and decreased lean amine temperature increased the efficiency of the column. Next, energy analysis is implemented in the stripping column resulted 29.22kW, 25.75kW and 10kW of single MEA, MDEA and mixture of MEA and MDEA. Through this study, mixture amine is proven is the best amine solvent to use as it has high removal efficiency, high amine recovery and minimize the energy penalty.