Purpose This paper aims to compare the environmental im- environmental impacts of the gasification and usage pacts of LNG in different life cycle stages and for various stages far outweigh that of the transportation stage, and usages by applying life cycle assessment (LCA). According the highest environmental impact category for each sce- to different usage processes, we set three scenarios including nario is GWP. The largest contribution factor to GWP of S1-hydrogen production, S2-electricity generation, and S3- S1 is the production supply of imported electricity, where- vehicle fuel to evaluate their environmental impacts. as the largest contributionfactortoGWP of S2andS3is Furthermore, in order to satisfy better city development, an the emissions. The optimization analysis indicate that optimization analysis was made to identify the optimal distri- when imported LNG is allocated 25% for hydrogen pro- bution structure of LNG. duction, 73% for electricity generation and 2% for vehicle Methods The environmental impact analysis of LNG was fuel, the GWP and cost of the total LNG usage are both conducted using life cycle assessment and CML2001 method. minimum. LCA was performed based on the ISO 14040 standard using Conclusions Environmental analysis on different LNG us- GaBi 5.0 software. Four impact categories (i.e.,
The International Journal of Life Cycle Assessment – Springer Journals
Published: Jul 10, 2017
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