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首页> 外文期刊>Environmental Science & Technology >Variability and Uncertainty in Life Cycle Assessment Models for Greenhouse Gas Emissions from Canadian Oil Sands Production
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Variability and Uncertainty in Life Cycle Assessment Models for Greenhouse Gas Emissions from Canadian Oil Sands Production

机译：加拿大油砂生产温室气体排放的生命周期评估模型的变异性和不确定性

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摘要

Because of interest in greenhouse gas (GHG) emissions from transportation fuels production, a number of recent life cycle assessment (LCA) studies have calculated GHG emissions from oil sands extraction, upgrading, and refining pathways. The results from these studies vary considerably. This paper reviews factors affecting energy consumption and GHG emissions from oil sands extraction. It then uses publicly available data to analyze the assumptions made in the LCA models to better understand the causes of variability in emissions estimates. It is found that the variation in oil sands GHG estimates is due to a variety of causes. In approximate order of importance, these are scope of modeling and choice of projects analyzed (e.g., specific projects vs industry averages); differences in assumed energy intensities of extraction and upgrading; differences in the fuel mix assumptions; treatment of secondary noncombustion emissions sources, such as venting, flaring, and fugitive emissions; and treatment of ecological emissions sources, such as land-use change-associated emissions. The GHGenius model is recommended as the LCA model that is most congruent with reported industry average data. GHGenius also has the most comprehensive system boundaries. Last, remaining uncertainties and future research needs are discussed.
机译：由于对运输燃料生产中的温室气体（GHG）排放感兴趣，因此最近的许多生命周期评估（LCA）研究已计算出油砂提取，提质和提炼途径中的温室气体排放。这些研究的结果差异很大。本文回顾了影响油砂开采能耗和温室气体排放的因素。然后，它使用可公开获得的数据来分析LCA模型中所做的假设，以更好地了解排放估算值变化的原因。发现油砂温室气体估算值的变化是由于多种原因造成的。按重要性排序，这些是建模范围和所分析项目的选择（例如，特定项目与行业平均值）；提取和提纯的假定能量强度的差异；燃料混合假设的差异；处理次要的非燃烧排放源，例如放空，燃烧和逃逸排放；和生态排放源的处理，例如与土地利用变化相关的排放。建议将GHGenius模型用作与报告的行业平均数据最一致的LCA模型。 GHGenius还具有最全面的系统边界。最后，讨论了剩余的不确定性和未来的研究需求。

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  • 来源
    《Environmental Science & Technology》 |2012年第2期|p.1253-1261|共9页
  • 作者

    Adam R. Brandt;

  • 作者单位

    Department of Energy Resources Engineering, Stanford University, Stanford, California 94305-6105, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
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