Life cycle CO{sub}2 analysis of town gas and LNG

摘要

This analysis was conducted on greenhouse gas emission of LNG chain and life cycle of Town Gas 13A. It was based on highly reliable data which are qualified in terms of its source and representativeness. Actually, the latest and reliable data for CO{sub}2 and CH{sub}4 emission from the natural gas field and liquefaction plant were obtained through field study. Moreover the analysis includes CO{sub}2 emission of LNG transportation stage, domestic town gas production and supply stage and the construction stage of all the facilities from the oversea natural gas production to the final domestic consumption, and CO{sub}2 reduction effect of LNG cold utilization was also considered. As a result of the evaluation, level of CH{sub}4 release and energy consumption in the modern natural gas production and liquefaction plant were lower than those previously reported due to improvement of the production process, etc. The results of the analysis are also considered to provide very useful basic data for conducting life cycle analysis of product system in general as well as energy system.