Biosphere-atmosphere exchange of volatile organic compounds over C4   biofuel crops

doi:10.1016/j.atmosenv.2011.12.042

CORC > 北京大学 > 环境科学与工程学院

	Biosphere-atmosphere exchange of volatile organic compounds over C4 biofuel crops
	Graus, Martin ; Eller, Allyson S. D. ; Fall, Ray ; Yuan, Bin ; Qian, Yaling ; Westra, Philip ; de Gouw, Joost ; Warneke, Carsten
刊名	大气环境
	2013
关键词	Biofuel crops Volatile organic compounds (VOC) Biogenic VOC emissions VOC sink Biofuel life cycle Proton transfer-reaction mass spectrometry (PTR-MS) REACTION-MASS-SPECTROMETRY AIR-SURFACE EXCHANGE EMISSION RATES GAS-PHASE HYDROCARBON EMISSIONS PLANT-LEAVES PTR-MS GRASSLAND MONOTERPENE SWITCHGRASS
DOI	10.1016/j.atmosenv.2011.12.042
英文摘要	Significant amounts of ethanol are produced from biofuel crops such as corn and, in the future, likely switchgrass. The atmospheric effects of growing these plant species on a large scale are investigated here by measuring the plant-atmosphere exchange of volatile organic compounds (VOCs). Field grown corn and switchgrass emit VOCs at flux rates of 4.4 nmol(C) m(-2) s(-1) (10(-9) mol carbon per square meter leaf area per second) and 2.4 nmol(C) m(-2) s(-1), respectively. Methanol contributes 60% to the molar flux but small emissions of carbonyls, aromatic compounds and terpenoids are relatively more important for potential air quality impacts. Switchgrass can act as a sink for carbonyls and aromatic compounds with compensation points of a few hundred pptv. In switchgrass moderate drought stress may induce enhanced emissions of monoterpenes, carbonyls and aromatics. Per liter of fuel ethanol produced, the estimated VOC emissions associated with the biomass growth of corn (7.8 g l(-1)) or switchgrass (6.2 g l(-1)) are in the same range as the VOC emissions from the use of one liter gasoline in vehicle engines. VOC emissions from the growing of biofuel crops can therefore be a significant contributor to the VOC emissions in the life cycle of biofuels. The VOC emissions from corn and switchgrass are small compared to those of tree species suggested as biofuel crops. Due to their reactivity with respect to OH the emissions from corn and switchgrass are not likely to have a significant impact on regional ozone formation. (c) 2011 Elsevier Ltd. All rights reserved.; Environmental Sciences; Meteorology & Atmospheric Sciences; SCI(E); EI; 6; ARTICLE; ,SI; 161-168; 66
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/239829]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Graus, Martin,Eller, Allyson S. D.,Fall, Ray,et al. Biosphere-atmosphere exchange of volatile organic compounds over C4 biofuel crops[J]. 大气环境,2013.
APA	Graus, Martin.,Eller, Allyson S. D..,Fall, Ray.,Yuan, Bin.,Qian, Yaling.,...&Warneke, Carsten.(2013).Biosphere-atmosphere exchange of volatile organic compounds over C4 biofuel crops.大气环境.
MLA	Graus, Martin,et al."Biosphere-atmosphere exchange of volatile organic compounds over C4 biofuel crops".大气环境 (2013).