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태안 석탄화력발전소의 대기오염저감과 CO₂ 포집에 대한 전과정평가 연구
류승걸(Seung Gul Ryoo),정한솔(Han Sol Jung),강용태(Yong Tae Kang) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
Although fossil fuel power generation is a reliable power source, it is responsible for serious air pollutions from the combustion process. With CO₂ emission recognized as air pollutant, CO₂ capture technology emerged as a solution to fossil power plants. The post-treatment process requires additional process to power generation. In similarity, the air pollution controls should be considered before the CO₂ capture. In this research, Taean coal power plant is selected for life cycle assessment upon fitting CO₂ capture unit in resemblance to the flue gas treatments. By comparing the results, environmental impacts by two transitions; air pollution control, and CO₂ capture, are analyzed. In conclusion, comparison results indicated a significant decrease of global warming potential, but aggravating environmental impacts, therefore careful consideration is recommended upon deployment.
류승걸(Seung Gul Ryoo),김민재(Min Jae Kim),정한솔(Han Sol Jung),강용태(Yong Tae Kang) 대한설비공학회 2020 대한설비공학회 학술발표대회논문집 Vol.2020 No.6
As the global warming becomes crucial, Carbon Capture and Storage (CCS) technology has been paid more attention. However, the CCS technology is limited as temporary solution for mitigating the global warming. For this reason, Carbon Capture and Utilization (CCU) technology is implemented. The CCU technologies convert carbon dioxide into products with a higher value. Due to low technological readiness level of CCU technologies, it is important to perform Life Cycle Assessment (LCA) to ensure environmental safety and low global warming potential (GWP). In this study, four different CO₂-Methanol conversion methods; coal gasification-to-methanol, coal coking-to-methanol, photocatalytic conversion, hydrogenation-to-methanol are selected to perform the LCA. With calculations based on 1㎏ methanol production, GWP for each are estimated 17.7, 2.89, 1.75, 9.69 ㎏CO₂eq, respectively. Non-fossil based photocatalytic conversion and hydrgenation-to-methanol are selected to analyze the GWP with varying energy sources. It is found that GWP of hydrogenation-to-methanol has maximum fluctuation of 8.44 ㎏CO₂eq for varied electricity source, while 0.33 ㎏CO₂eq for heat source variation. Photocatalytic conversion shows an opposite result; heat source variation with maximum of 0.61 ㎏CO₂eq, while electricity source variation of 0.37 ㎏CO₂eq.
김민재(Min Jae Kim),정한솔(Han Sol Jung),류승걸(Seung Gul Ryoo),강용태(Yong Tae Kang) 대한설비공학회 2019 대한설비공학회 학술발표대회논문집 Vol.2019 No.11
Policies and technologies to reduce the greenhouse gases are being introduced around the world in order to prevent global warming. In the technical field, Carbon Capture and Storage (CCS) technology, which captures and stores carbon dioxide from emission sources, has been widely used, but it is not considered as a fundamental solution. Consequently, Carbon Capture and Utilization (CCU), which converts carbon dioxide into other high value materials, is emerging as an alternate technology. In this study, Life Cycle Assessment (LCA) of methanol synthesis, one of the fueling CCU technology is executed to measure the environmental impacts, and it is compared with other methanol synthesis using the biomass. For each case, the results are calculated based on 1kg of methanol production limited in each analysis boundary. The global warming impact is measured as 2.23, 2.58, 3.42 ㎏CO₂eq. and the CCU process shows the lowest value. Also the results can vary sensitively depending on the analysis boundaries.