气候变化领域集成服务门户(CCPortal): Erratum: What would it take for renewably powered electrosynthesis to displace petrochemical processes? (Science DOI: 10.1126/science.aav3506)

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DOI	10.1126/SCIENCE.ABB0992
	Erratum: What would it take for renewably powered electrosynthesis to displace petrochemical processes? (Science DOI: 10.1126/science.aav3506)
	De Luna P.; Hahn C.; Higgins D.; Jaffer S.A.; Jaramillo T.F.; Sargent E.H.
发表日期	2020
ISSN	0036-8075
卷号	367 期号:6482
英文摘要	In the Review “What would it take for renewably powered electrosynthesis to displace petrochemical processes?,” a stoichiometry error led to incorrect values for CO2 emitted per kilogram of product for ethylene and ethanol. The correct values are now used: 1.57 kg CO2 per kg product for ethylene (instead of 3.14) and 0.95 kg CO2 per kg product for ethanol (instead of 1.91). The energy cost of CO2 separation has also been corrected from 1 kWh/kg CO2 to 0.354 kWh/kg CO2 for both ethanol and formic acid. Moreover, global warming impact (GWI) is now used in place of global warming potential (GWP) and is reported with cradle-to-gate values. The GWI of ethylene was corrected from 5.75 kg CO2/kg product to 1.1 kg CO2/kg product. The GWI of ethanol was corrected to –0.5 kg CO2/kg product to be consistent with ethanol production from corn. The GWI of carbon monoxide was corrected to 0.57 kg CO2/kg product as taken from the GaBi LCA Database. The GWI of formic acid was corrected to 2.00 kg CO2/kg product to reflect the cradle-to-gate value of formic acid production. The grid intensity was changed to 0.295 kg CO2e/kWh as the base case; this represents the average CO2 emissions intensity from electricity generation in the European Union in 2016 for data S1 and S2 and in Table 2. The units for energy for CO2 conversion and separation are now corrected from kWh/kg CO2 to kWh/kg product. Baseline emissions per year are now corrected to be the product volume multiplied by the CO2 per kg product. As a result of these corrections, Fig. 3 and Table 2 were updated to reflect the corrected CO2emissions model. The accompanying text was also changed to clarify that, using the average European Union intensity in 2016 to power the electrochemistry, only formic acid and carbon monoxide production are cradle-to-gate carbon-negative. The grid carbon intensity would need to reach 0.11 kg CO2e/kWh or lower for the cradle-to-gate carbon-neutral or carbon-negative electrochemical synthesis of ethylene and ethanol. New references (13), (37), (116), (120), and (128) have been added to the list and cited. The supplementary materials, including the data files, have also been updated to reflect these changes. The authors gratefully acknowledge the contributions of Benedikt Winter and André Bardow, who helped to identify and correct errors in carbon emissions calculations. The requirements on the grid intensity for the cradle-to-gate production of chemicals to become carbon emissions–negative are corrected downward as a result. The overall trends—that the grid intensity and conversion efficiency are the largest factors in achieving economic and environmental benefits from CO2 reduction—remain as before. The authors also thank Anne Hauch, Rainer Küngas, Peter Blennow, and Mogens B. Mogensen for notes that resulted in additional changes. Figure 1B has been updated to place CO and formic acid labels in their correct positions. Figure 1 and table S3 have been updated to report partial current densities at corresponding maximum reported Faradaic efficiencies. The FE% point for ethanol production at 63% was removed from Fig. 1B, as that study reported synthesis via CO reduction, not CO2 reduction. © 2020 American Association for the Advancement of Science. All rights reserved.
英文关键词	erratum; Zea mays
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/243483
推荐引用方式 GB/T 7714	De Luna P.,Hahn C.,Higgins D.,et al. Erratum: What would it take for renewably powered electrosynthesis to displace petrochemical processes? (Science DOI: 10.1126/science.aav3506)[J],2020,367(6482).
APA	De Luna P.,Hahn C.,Higgins D.,Jaffer S.A.,Jaramillo T.F.,&Sargent E.H..(2020).Erratum: What would it take for renewably powered electrosynthesis to displace petrochemical processes? (Science DOI: 10.1126/science.aav3506).Science,367(6482).
MLA	De Luna P.,et al."Erratum: What would it take for renewably powered electrosynthesis to displace petrochemical processes? (Science DOI: 10.1126/science.aav3506)".Science 367.6482(2020).