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dc.contributor.authorGrubert, Emily
dc.contributor.authorBrandt, Adam
dc.date.accessioned2019-03-14T16:08:03Z
dc.date.available2019-03-14T16:08:03Z
dc.date.issued2019-03-13
dc.identifier.citations: Grubert EA, Brandt AR, Three considerations for modeling natural gas system methane emissions in life cycle assessment, Journal of Cleaner Production (2019), doi: https:// doi.org/10.1016/j.jclepro.2019.03.096en_US
dc.identifier.urihttp://hdl.handle.net/1853/60937
dc.descriptionAuthor pre-print and supplementary dataen_US
dc.description.abstractNatural gas is a fossil fuel accounting for about 30% of US primary energy consumption. Climate change is one of the primary environmental issues associated with natural gas use: natural gas combustion releases carbon dioxide. A less emphasized issue is that natural gas is mostly methane, a potent greenhouse gas (GHG). The climate impact of natural gas use is thus sensitive to the amount of methane that escapes from the natural gas system unburned. We call attention to three considerations for modeling natural gas-related methane emissions in life cycle assessment (LCA). First, natural gas system methane leakage is inconsistently characterized and likely systematically underestimated by commonly used life cycle inventory (LCI) databases. Second, studies are often imprecise in assumptions about process boundaries. This matters because not all natural gas uses rely on the same infrastructure and induce the same methane leakage. Third, there is not yet a stable estimate for the global warming potential (GWP) of methane. Newer estimates tend to be larger, which further exacerbates the underestimation of GHG impacts from natural gas systems. Data uncertainty is common in LCA, but natural gas-related methane emissions deserve special attention due to their influence on a decision-relevant parameter (GHG intensity) in product systems across the economy.en_US
dc.language.isoen_USen_US
dc.publisherElsevieren_US
dc.subjectMethaneen_US
dc.subjectInventoryen_US
dc.subjectClimate changeen_US
dc.subjectCarbon footprinten_US
dc.subjectLeakageen_US
dc.subjectNatural gasen_US
dc.titleThree Considerations for Modeling Natural Gas System Methane Emissions in Life Cycle Assessmenten_US
dc.typePre-printen_US
dc.contributor.corporatenameGeorgia Institute of Technology. School of Civil and Environmental Engineeringen_US
dc.contributor.corporatenameStanford University. Energy Resources Engineeringen_US
dc.identifier.doihttps:// doi.org/10.1016/j.jclepro.2019.03.096en_US


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