Storage and Oxidation of Oxygen-Free and Oxygenated Hydrocarbons on a Pt–Pd Series Production Oxidation Catalyst
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Within the Research Cluster of Excellence “Tailor-Made Fuels from Biomass” at RWTH Aachen University, novel fuels from biomass for internal combustion engines are investigated. The new fuels tend to soot less, which allows to increase exhaust gas recirculation for reduction of nitrogen oxides (NOx) emissions. This increases the emissions of unburnt hydrocarbons (HC), while the composition of the HC emissions changes because of the changed fuel composition. The impact of 16 different oxygen-free and oxygenated hydrocarbons (1-octanol, di-n-butyl ether (DNBE), 2-butanone and ethanol as examples for bio-derived fuels; toluene and n-heptane as examples for conventional fuels’ components; propane, propene, ethane, ethene, ethyne, methane, n-butane, isobutane, n-pentane and 2-propanol as HC known to be in exhaust gases) on a series production Pt–Pd/Al2O3 oxidation catalyst on a cordierite substrate has been investigated regarding adsorption and temperature programmed oxidation (TPO). In general, due to higher polarity oxygenated HC are stronger adsorbed than oxygen-free ones. For 1-octanol, an extraordinary high adsorption could be observed associated with vigorous exothermal oxidation reaction during TPO. Additionally, the temperature programmed desorption of 1-octanol and ethanol has been investigated by Diffuse Reflectance Infrared Fourier Transform Spectroscopy (TP-DRIFTS). Adsorbed alcohol species as well as oxidized products were demonstrated to be present.
KeywordsOxygenated hydrocarbons Pt–Pd/Al2O3 Adsorption Temperature programmed oxidation DRIFTS Alternative fuels
This study was conducted as part of the Cluster of Excellence “Tailor-Made Fuels from Biomass”, which is funded by the Excellence Initiative of the German Federal and State Governments to promote science and research at German universities.
- 1.Pischinger S, Hoppe F, Krieck M et al (2016) Fuel design for future combustion engines: a view from the cluster “Tailor-Made Fuels from Biomass”. In: Lenz HP (ed) 37th International Vienna Motor Symposium 28–29 April, 2016: organized by the Austrian Society of Automotive Engineers (ÖVK) and the Institute for Powertrains and Automotive Technology, Vienna University of Technology; presented by Univ.-Prof. Dr. Hans Peter Lenz (VDI), vol 799, pp 224–252Google Scholar
- 4.Adomeit P, Scharf J, Thewes M et al (2017) Extreme lean gasoline technology—best efficiency and lowest emission powertrains. In: Liebl J, Beidl C (eds) Internationaler Motorenkongress 2017: Mit Konferenzen Nfz-Motorentechnologie und Neue Kraftstoffe. Springer Fachmedien Wiesbaden, Wiesbaden, pp 101–122CrossRefGoogle Scholar
- 5.Wunsch R, Hohner P, Schön C et al (2016) Advanced exhaust gas aftertreatment system for gasoline engines to fulfill LEV III/Tier 3 legislation. In: Zellbeck H (ed) 8th Emission Control 2016: 2nd–3rd June 2016 in Dresden, GermanyGoogle Scholar
- 6.Philipp S, Hoyer R, Adam F et al (2013) Exhaust gas aftertreatment for lean gasoline direct injection engines—potential for future applications. In: SAE 2013 World Congress & Exhibition, SAE Paper 2013-01-1299. SAE International, 400 Commonwealth Drive, Warrendale, PA, United StatesGoogle Scholar
- 28.Chen P, Schönebaum S, Simons T et al (2015) Correlating the integral sensing properties of zeolites with molecular processes by combining broadband impedance and DRIFT spectroscopy: a new approach for bridging the scales. Sensors 15(11):28915–28941. https://doi.org/10.3390/s151128915 CrossRefPubMedGoogle Scholar
- 34.Stein SE, The Coblentz Society, Inc (1997) Evaluated infrared reference spectra. In: Linstrom PJ, Mallard WG (eds) NIST Chemistry WebBook: NIST Standard Reference Database, 69th edn. National Institute of Standards and Technology, Gaithersburg. https://doi.org/10.18434/T4D303. Accessed 11 Jun 2018CrossRefGoogle Scholar
- 35.National Institute of Advanced Industrial Science and Technology (2018) SDBSWeb. http://sdbs.db.aist.go.jp. Accessed 11 Jun 2018
- 36.Harmsen JMA (2001) Kinetic modelling of the dynamic behavior of an automotive three-way catalyst under cold-start conditions. Dissertation, Technische Universiteit EindhovenGoogle Scholar