ORCID Profile
0000-0002-0837-3456
Current Organisation
Universität Bremen
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Publisher: SPIE
Date: 16-09-2014
DOI: 10.1117/12.2061378
Publisher: American Chemical Society (ACS)
Date: 14-12-2015
Abstract: Using blends of bioethanol and gasoline as automotive fuel leads to a net decrease in the production of harmful emission compared to the use of pure fossil fuel. However, fuel droplet evaporation dynamics change depending on the mixing ratio. Here we use single particle manipulation techniques to study the evaporation dynamics of ethanol/gasoline blend microdroplets. The use of an electrodynamic balance enables measurements of the evaporation of in idual droplets in a controlled environment, while optical tweezers facilitate studies of the behavior of droplets inside a spray. Hence, the combination of both methods is perfectly suited to obtain a complete picture of the evaporation process. The influence of adding varied amounts of ethanol to gasoline is investigated, and we observe that droplets with a greater fraction of ethanol take longer to evaporate. Furthermore, we find that our methods are sensitive enough to observe the presence of trace amounts of water in the droplets. A theoretical model, predicting the evaporation of ethanol and gasoline droplets in dry nitrogen gas, is used to explain the experimental results. Also a theoretical estimation of the saturation of the environment, with other aerosols, in the tweezers is carried out.
Publisher: Elsevier BV
Date: 02-2016
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7CP01468F
Abstract: Temperature-dependent Raman spectra of tetradecane, pentadecane and hexadecane are collected and analysed to unveil the difference in the speed of their phase transitions while gaining information about their structural changes.
Publisher: Springer Science and Business Media LLC
Date: 20-06-2008
Publisher: Elsevier BV
Date: 02-2015
Location: United Kingdom of Great Britain and Northern Ireland
Location: No location found
No related grants have been discovered for Johannes Kiefer.