Emissions of anthropogenic hydrogen to the atmosphere during the potential transition to an increasingly H2-intensive economy
✍ Scribed by S.W. Bond; T. Gül; S. Reimann; B. Buchmann; A. Wokaun
- Publisher
- Elsevier Science
- Year
- 2011
- Tongue
- English
- Weight
- 586 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0360-3199
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✦ Synopsis
In this study, current and future anthropogenic hydrogen (H 2 ) 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 H 2 from fossil-fuels. H 2 emissions from transportation are estimated at 4.5 Tg for 2010. An additional w0.5e2 Tg H 2 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 H 2 fuel cell vehicles (FCVs). In 2050, overall anthropogenic H 2 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 H 2 emissions exceeding current levels even with no net H 2 emissions from FCVs. However, based on an average loss rate of 0.1%, H 2 emission factors from FCVs on the order to 120e170 mg km À1 are projected to result in overall anthropogenic H 2 emissions similar to 2010 levels.