Carbon sequestration potential of the Mae Moh mine, Northern Thailand

Abstract

The main source of carbon dioxide (CO2) emissions in Thailand is the energy sector, particularly coal-fired power plants. The Mae Moh lignite-fired power plant, owned by the Electricity Generating Authority of Thailand (EGAT), stands out as the primary point source of CO2 emissions in the energy sector. Situated in Northern Thailand, this power plant relies on lignite supplied from the Mae Moh lignite open-pit mine in the same vicinity. Consequently, this study conducts a preliminary assessment of the geological CO2 storage potential of the Mae Moh mine, evaluating its suitability as a CO2 storage site. The concept of CO2 sequestration in unmineable coal seams is considered as a potential approach to mitigate CO2 emissions by injecting CO2 into these seams. While a substantial portion of the remaining coal at the Mae Moh mine may still be extractable through traditional methods, the feasibility of opening new mines is uncertain. This study aims to evaluate the suitability of coal seams for CO2 storage, taking into account geological, technical, economic, and safety criteria. The findings of this study are anticipated to contribute to an enhanced understanding of carbon sequestration in coal seams in Thailand.