气候变化领域集成服务门户(CCPortal): The carbon footprint of the carbon feedstock CO2

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DOI	10.1039/d0ee01530j
	The carbon footprint of the carbon feedstock CO2
	Müller L.J.; Kätelhön A.; Bringezu S.; McCoy S.; Suh S.; Edwards R.; Sick V.; Kaiser S.; Cuéllar-Franca R.; El Khamlichi A.; Lee J.H.; Von Der Assen N.; Bardow A.
发表日期	2020
ISSN	17545692
起始页码	2979
结束页码	2992
卷号	13 期号:9
英文摘要	Capturing and utilizing CO2 as carbon feedstock for chemicals, fuels, or polymers is frequently discussed to replace fossil carbon and thereby help mitigate climate change. Emission reductions by Carbon Capture and Utilization (CCU) depend strongly on the choice of the CO2 source because CO2 sources differ in CO2 concentration and the resulting energy demand for capture. From a climate-change perspective, CO2 should be captured at the CO2 source with the lowest CO2 emissions from capture. However, reported carbon footprints differ widely for CO2 captured, from strongly negative to strongly positive for the same source. The differences are due to methodological ambiguity in the treatment of multifunctionality in current assessment practice. This paper reviews methodological approaches for determining the carbon footprint of captured CO2 as carbon feedstock, and shows why some approaches lead to suboptimal choices of CO2 sources and that increased consistency in life cycle assessment (LCA) studies on CCU is needed. Based on strict application of Life Cycle Assessment (LCA) standards and guidelines, it is shown that substitution should be applied to avoid suboptimal choices of CO2 sources. The resulting methodological recommendations are applied to estimate the carbon footprint of feedstock CO2 for current CO2 sources in Europe and for future CO2 sources in a scenario for a low carbon economy. For all CO2 sources, the cradle-to-gate footprint of captured CO2 is negative ranging from -0.95 to -0.59 kg CO2 eq. per kg of feedstock CO2 today and from -0.99 to -0.98 kg CO2 eq. in a low carbon economy. The carbon footprints of different CO2 sources differ mainly due to their energy demands. The presented assessment method and the carbon footprints of the CO2 feedstocks CO2 provide the basis for future assessments of carbon capture and utilization processes. This journal is © The Royal Society of Chemistry.
英文关键词	Carbon capture; Carbon dioxide; Climate change; Emission control; Environmental management; Feedstocks; Life cycle; Assessment practices; Emission reduction; Life Cycle Assessment (LCA); Low carbon economy; Methodological approach; Multifunctionality; Standards and guidelines; Sub-optimal choices; Carbon footprint; carbon dioxide; carbon footprint; climate change; concentration (composition); emission control; life cycle analysis
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/189569
作者单位	Institute of Technical Thermodynamics, RWTH Aachen University Schinkelstr. 8, Aachen, 52062, Germany; Carbon Minds GmbH, Eupener Str. 165, Cologne, 50933, Germany; Center for Environmental Systems Research (CESR), Universität Kassel, Wilhelmshöher Allee 47, Kassel, 34109, Germany; Department of Chemical and Petroleum Engineering, University of Calgary, 750 Campus Dr NW, Calgary, AB T2N 4H9, Canada; Bren School of Environmental Science and Management, University of California, Santa Barbara Bren Hall, 2400 University of California, Santa Barbara, CA 93117, United States; European Commission-Joint Research Centre, Via Enrico Fermi 2749, Ispra (VA), 21027, Italy; Department of Mechanical Engineering, University of Michigan, 2007 W. E. Lay Automotive Laboratory, 1231 Beal Avenue, Ann Arbor, MI 48109-2133, United States; Department of Chemical Engineering and Analytical Science, Mill, University of Manchester, Sackville Street, Manchester, M13 9PL, United Kingdom; Ademe Industries, Department Avenue du Grés...
推荐引用方式 GB/T 7714	Müller L.J.,Kätelhön A.,Bringezu S.,et al. The carbon footprint of the carbon feedstock CO2[J],2020,13(9).
APA	Müller L.J..,Kätelhön A..,Bringezu S..,McCoy S..,Suh S..,...&Bardow A..(2020).The carbon footprint of the carbon feedstock CO2.Energy & Environmental Science,13(9).
MLA	Müller L.J.,et al."The carbon footprint of the carbon feedstock CO2".Energy & Environmental Science 13.9(2020).