생애주기를 고려한 선박 연료유의 온실가스 배출량 평가에 관한 연구

Abstract

Strong policies are being announced to reduce greenhouse gases in the international community. The International Maritime Organization is promoting the reduction of greenhouse gas and policy establishment of ships sailing internationally. The initial strategy for greenhouse gas reduction announced in 2018 aims to reduce greenhouse gas by 50% by 2050 compared to 2008. In order to achieve the greenhouse gas reduction goal, it was decided to introduce regulations on operating ships such as EEXI and CII. In addition, safety standards and evaluation standards are being developed for the introduction of low-carbon and zero carbon fuels. LNG, LPG, and biofuels are evaluated as low-carbon fuels, while hydrogen and ammonia are evaluated as non-carbon fuels. However, in the case of hydrogen and ammonia, there is a possibility that a large amount of greenhouse gas will be emitted depending on the production process. In this case, when the fuel's Life Cycle Assession is performed, more greenhouse gas is emitted than the existing fuel. In order to reduce greenhouse gas generated by ships, greenhouse gas emissions from other industries are increased, resulting in a problem of ultimately increasing greenhouse gas emissions. As a way to solve this problem, we intend to introduce LCA of fuel, and we are developing standards for performing LCA. In Korea, a method of reforming and producing hydrogen and ammonia is used, and LNG fuel must be imported from abroad to modify. For imports, it is necessary to consider greenhouse gases generated in the process of domestic transportation and vaporization, and in this case, the greenhouse gas emission coefficients of Korea and LNG producers differ. Therefore, it is expected that each country will have a greenhouse gas emission coefficient, and in the case of Korea, the emission coefficient of alternative fuels used in Korea is to be developed in this study through life cycle evaluation of alternative fuels.