A combustion chemistry study of tetramethylethylene in a laminar premixed low-pressure hydrogen flame |
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| Institution: | 1. Institute of Combustion Technology, German Aerospace Center (DLR), Pfaffenwaldring 38-40, 70569 Stuttgart, Germany;2. Laboratory for Synchrotron Radiation and Femtochemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland;3. Mass Spectrometry in Reactive Flows, University of Duisburg-Essen, Lotharstraße 1, 47057 Duisburg, Germany;4. Division 9, State Health Office, Nordbahnhofstraße 135, 70191 Stuttgart, Germany;5. Technical Thermodynamics, Paderborn University, 33098 Paderborn, Germany;1. King Abdullah University of Science and Engineering (KAUST), Clean Combustion Research Center, Physical Sciences and Engineering Division, Thuwal 23955-6900, Saudi Arabia;2. Molecular Science and Nano-Materials Lab, Institute for Computational Science and Technology, SBI Building, Quang Trung Software City, Tan Chanh Hiep Ward, District 12, Ho Chi Minh City, Vietnam;3. University of Science, Vietnam National University – HCMC, 227 Nguyen Van Cu, Ward 4, District 5, Ho Chi Minh City, Vietnam;4. Vietnam National University – HCMC, Quarter 6, Linh Trung Ward, Thu Duc City, Ho Chi Minh City, Vietnam;5. International University, Quarter 6, Linh Trung Ward, Thu Duc City, Ho Chi Minh City, Vietnam;1. Chair of High Pressure Gas Dynamics, Shock Wave Laboratory, RWTH Aachen University, Aachen 52056, Germany;2. Institute of Technical Thermodynamics, RWTH Aachen University, Aachen 52056, Germany;3. DRIVE EA1859, Université de Bourgogne Franche-Comté, 49 Rue Mademoiselle Bourgeois, Nevers 58000, France;4. IRCER, UMR CNRS 7315, Université de Limoges, Limoges 87032, France;1. Key Laboratory for Power Machinery and Engineering of MOE, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, PR China;2. Clean Combustion Research Center, King Abdullah University of Science and Technology, Thuwal, 23955, Kingdom of Saudi Arabia;1. Department of Chemistry, University of Helsinki, P.O. Box 55 (A.I. Virtasen aukio 1), Helsinki 00014, Finland;2. Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar Tudósok krt. 2., Budapest H-1117, Hungary;3. Chair of High Pressure Gas Dynamics, Shock Wave Laboratory, RWTH Aachen University, Aachen 52056, Germany |
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| Abstract: | The combustion chemistry of tetramethylethylene (TME) was studied in a premixed laminar low-pressure hydrogen flame by combined photoionization molecular-beam mass spectrometry (PI-MBMS) and photoelectron photoion coincidence (PEPICO) spectroscopy at the Swiss Light Source (SLS) of the Paul Scherrer Institute in Villigen, Switzerland. This hexene isomer with the chemical formula C6H12 has a special structure with only allylic C H bonds. Several combustion intermediate species were identified by their photoionization and threshold photoelectron spectra, respectively. The experimental mole fraction profiles were compared to modeling results from a recently published kinetic reaction mechanism that includes a TME sub-mechanism to describe the TME/H2 flame structure. The first stable intermediate species formed early in the flame front during the combustion of TME are 2-methyl-2-butene (C5H10) at a mass-to-charge ratio (m/z) of 70, 2,3-dimethylbutane (C6H14) at m/z 86, and 3-methyl-1,2-butadiene (C5H8) at m/z 68. Isobutene (C4H8) is also a dominant intermediate in the combustion of TME and results from consumption of 2-methyl-2-butene. In addition to these hydrocarbons, some oxygenated species are formed due to low-temperature combustion chemistry in the consumption pathway of TME under the investigated flame conditions. |
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