首頁 > 資料下載 > 發(fā)電用煤、天然氣、LNG和SNG的壽命周期空氣排放比較Comparative Life-Cycle Air Emissions of Coal, Domestic Natural Gas, LNG,

發(fā)電用煤、天然氣、LNG和SNG的壽命周期空氣排放比較Comparative Life-Cycle Air Emissions of Coal, Domestic Natural Gas, LNG,

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更新時間：2021-09-09
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天然氣系統(tǒng)是美國的溫室氣體排放，產(chǎn)生每年大約有1.32億噸二氧化碳當量(1)。空氣污染物排放標準的顯著性也來自于燃氣的上游燃燒生命周期階段。排放來自正在出現(xiàn)的LNG生命周期階段或來自尚未對SNG的生產(chǎn)進行詳細研究。如果更大美國天然氣供應(yīng)的百分比將來自這些替代資源，然后是LNG或SNG供應(yīng)鏈排放成為全面理解的重要組成部分天然氣生命周期排放量。此外，比較只集中于排放的煤和天然氣在公用事業(yè)公司可能不夠。這樣做的目的研究是對天然氣進行生命周期分析（9，10）， LNG和SNG。在處理過程中直接排放空氣將考慮生命周期以及來自燃料和電的燃燒過程。與煤炭生命周期的空氣排放相比較為了更好地理解用煤與自然的優(yōu)缺點用于發(fā)電的氣體。

The natural gas system is one of the largest sources of greenhouse gas emissions in the United States, generating around 132 million tons of CO2 equivalents annually (1). Significant emissions of criteria air pollutants also come from upstream combustion life-cycle stages of the gas. Emissions from the emerging LNG life-cycle stages or from the production of SNG have not been studied in detail. If larger percentages of the U.S. supply of natural gas will come from these alternative sources, then LNG or SNG supply chain emissions become an important part of understanding overall natural gas life-cycle emissions. Also, comparisons between coal and natural gas that concentrate only on the emissions at the utility plant may not be adequate. The objective of this study is to perform a life-cycle analysis (9, 10) of natural gas, LNG, and SNG. Direct air emissions from the processes during the life-cycle will be considered, as well as air emissions from the combustion of fuels and electricity used to run the process. A comparison with coal life-cycle air emissions will be presented, in order to have a better understanding of the advantages and disadvantages of using coal versus natural gas for electricity generation.

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