Study on the Performances of Flue Gas CO2 Recovery Systems
| Autor: | Chien-Ming Shih, 施建名 |
|---|---|
| Rok vydání: | 2003 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 91 According to the assessment of International Energy Agent, solvent absorption with various amines is the most economically feasible technology for reducing atmospheric carbon dioxide concentration. However, the carbon dioxide recovery system posts significant impact on the electricity cost. An effective and economical way for cost reduction is using mathematical model which can accurately simulate the system. This thesis using a model reported in the literature, which is based on the rate-based distillation model-RATEFRAC, to investigate the performance and effects of design parameters of the carbon dioxide recovery system for typical coal-burning and natural gas-burning power plants. The system includes absorption and stripping units. The absorption solutions studied are MEA and mixed DGA-MDEA aqueous solutions. Besides the conventional scheme, this study investigate the scheme with inter-cooling and the split-flow scheme. For conventional scheme, the most significant parameters are lean solution loading, stripper pressure and feed gas concentration. Cost benefit can be obtained if inter-cooler is placed near the lower section of absorber and if the lean solution loading is more restricted. For system optimization, two schemes using MEA solution are studied, including conventional scheme with inter-cooling and split-flow scheme with inter-cooling. Logical search plan method is applied for finding the optimal design. Compared to the initial design, optimal designs provide cost reductions of 10% and 26%, respectively. The energy requirements are 3.38GJ/tCO2 and 4.05GJ/tCO2, respectively. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
| Externí odkaz: |
|