Capture Carbon Dioxide From Power Plant Flue Gases Using Thermodynamic Concepts

Yusmady, Mohamed Arifin (2003) Capture Carbon Dioxide From Power Plant Flue Gases Using Thermodynamic Concepts. Masters thesis, University of Manchaster.

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C02 has largest effect on world global warming. The increasing use of fossil fuels since the industrial revolution has demonstrably increases the atmospheric C02 concentration. Most of the fossil fuel usage is coming from power generation stations. Therefore, it is significant to cut in the energy sector C02 emissions in the energy sector, in order to stabilize the atmospheric green house gas concentration. The action that can be done is to capture C02 from the flue gas before it is released into the atmosphere. The flue gas from power plant contains gas mixtures with low concentration of C02 at near atmospheric pressure. The C02 content of flue gas from boilers used for power generation is approximately in the ranges of 7 vol% to 15 vol%. Thus, the purpose of this study is to survey different methods to capture C02 and identify the methods that are mostly suitable for power plant flue gas. For each method, energy and work requirement calculations are conducted in order to identify which method is the best to capture C02 from power plant flue gas. There are four types of C02 capture technology, which are commonly used: Absorption, adsorption, membrane and cryogenic method Through the literature survey, it is found that three dominating methods, namely: Absorption, Adsorption and Membrane methods, are suitable for low C02 concentration applications and can be inserted into an existing power plant without major modifications. In this study, priority is given to chemical absorption and pressure swing adsorption (PSA) methods because of their ability to capture low concentration of C02 and suit in C02 removal system. These methods are used to capture C02 from power plant flue gas (feed gas), which contains of 8.7% C02, 73.8% N2 and 17.5% H20 by mole fraction. However, H20 can be easily removed by condensation before the flue gas enters the systems mentioned above. Hence, the feed gas only contains 8.7 kmol of C02 and 73.8 kmol of N2 with every 100 kmol of feed gas. Energy and work consumption is an important process parameter in separation process. In order to choose which method is the best, energy and work consumption of separation process are calculated for chemical absorption and pressure swing adsorption methods. As a result it is found that Pressure Swing Adsorption method is the best in term of energy and work saving compared to the chemical absorption methods.

Item Type: Thesis (Masters)
Uncontrolled Keywords: Energy consumption, Energy conservation
Subjects: T Technology > T Technology (General)
T Technology > TJ Mechanical engineering and machinery
Divisions: Library > Tesis > FKM
Depositing User: Nor Aini Md. Jali
Date Deposited: 15 Sep 2014 14:37
Last Modified: 28 May 2015 04:30
Statistic Details: View Download Statistic

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