In this study, current and future anthropogenic hydrogen (H2) emissions to the atmosphere from technological processes are assessed. Current emissions are dominated by the direct exhaust gas of road-based motor vehicles and losses during the industrial production of H2 from fossil-fuels. H2 emissions from transportation are estimated at 4.5 Tg for 2010. An additional propor to 0.5 - 2 Tg H2 are estimated to be lost to the atmosphere from industrial processes in 2010. In 2020, emissions from transportation are estimated at approximately 50% of those in 2010. Future emissions will occur as losses along the entire production, distribution, and end-use chain, including emissions from H2 fuel cell vehicles (FCVs). In 2050, overall anthropogenic H2 emissions will only approach current levels at high-end loss rates; direct emissions from transportation are expected to be significantly lower than current levels. In 2100, an average loss rate of 0.5% would result in overall H2 emissions exceeding current levels even with no net H2 emissions from FCVs. However, based on an average loss rate of 0.1%, H2 emission factors from FCVs on the order to 120 - 170 mg km-1 are projected to result in overall anthropogenic H2 emissions similar to 2010 levels.
Emissions of anthropogenic hydrogen to the atmosphere during the potential transition to an increasingly H2-intensive economy
Emission von anthropogenem Wasserstoff in die Atmosphäre beim potentiellen Übergang zu einer zunehmend H2-intensiven Ökonomie
ICHMS, International Conference on Hydrogen Materials Science and Chemistry of Carbon Nanomaterials, 2009 ; 1122-1135
2011
14 Seiten
Conference paper
English
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