| Abstract | The electricity consumption in Thailand is expected to increase 4.22% per year. As a result, EGAT plans to install 9 clean coal power plants of 800 MW and 19 other power plants. Clean Coal Technologies (CCTs) will be installed in the new clean coal power plants to reduce the GHG emission. Carbon Capture and Sequestration (CCS) technologies are studied to find the possibility to adopt in coal -fired power plants in Thailand. This study aims to investigate the opportunities for introducing CCTs and CCS technologies for GHG mitigation in Thailand. In this study, the techno -economic analysis , and potential of GHG mitigation of CCTs and CCS technologies and the policies related to CCTs and CCS technologies are studied Techno -economic analysis of the existing coal -fired power plants and future coal -fired power plants are carried out. For the existing coal- fired power plants, Unit number 8 of Mae Moh power plant and BLCP power plant are selected. The power plant with high capacity and the use of good quality of coal is the better choice for Thailand than the power plant with lower capacity and the use of low grade of coal. It i s because of the power plant has higher the overall power plant efficiency and lower the GHG emissions of the power plant. For the future power plant, 3 cases are considered in this study which are case 1: 800MW clean coal power plant with LNB&OFA, ESP and FGD, case 2: 800MW clean coal power plant with LNB&OFA, SCR, ESP and FGD, and case 3: 800MW clean coal power plant with LNB&OFA, ESP, FGD, and CO2 capture system. The results show that the future power plant in case 1 is the most suitable choice for Thai land. It is because of the power plant in case 1 has highest overall power plant efficiency, lowest investment cost, and the GHG emissions are within the standard. Although, the power plant in case 2 has 59% lower NOx emissions than the power plant in case 1, it requires additional investment accounted for 631.9 million Baht. For the power plant in case 3, it has lower GHG emissions, especially CO2 and SO2 emissions. However, the power plant has 17.39% lower net electricity output and 15.4% lower the overall power plant efficiency. Moreover, the investment cost of the power plant is increased 15,323.04 million Baht. There are 3 majors policies related to CCTs and CCS technologies in Thailand, i.e., policies on the use of coal as for electricity generation, PDP 2010, and Thailand’s environmental standard. All of these policies are key factors in supporting the use of CCTs and CCS technologies in Thailand. |