Journal ArticleDOI
Shock-tube study of the ignition and product formation of fuel-rich CH4/air and CH4/additive/air mixtures at high pressure
Jürgen Herzler,Yasuyuki Sakai,Mustapha Fikri,Christof Schulz +3 more
- Vol. 37, Iss: 4, pp 5705-5713
Reads0
Chats0
TLDR
In this paper, the ignition delay times of fuel-rich methane/(additive)/air mixtures were measured in a shock tube at about 30 bar and temperatures between 600 and 1650 K.Abstract:
Higher-value chemicals can be produced from methane with small exergy losses by partial oxidation if the chemical conversion proceeds in an internal combustion engine (ICE) as a polygeneration process (Gossler and Deutschmann, 2015). Kinetics models are not sufficiently validated for the very fuel-rich and high-pressure conditions relevant for this process. Therefore, ignition delay times of fuel-rich methane/(additive)/air mixtures were measured in a shock tube at about 30 bar and temperatures between 600 and 1650 K. n-heptane and diethylether were used as additives to increase the reactivity of the fuel so that the polygeneration process can be realized in an ICE at HCCI conditions at lower compression temperatures. At ϕ = 2, measured ignition delay times agree well with simulations using different mechanisms from literature. Synthesis gas (CO, H2) is the main product at these conditions (Sen et al., 2016). For the production of higher hydrocarbons, the equivalence ratio must be increased. Very fuel-rich mixtures (ϕ = 10) were used because the temperature increase during the reaction of these mixtures is quite low (read more
Citations
More filters
Journal ArticleDOI
Power and syngas production from partial oxidation of fuel-rich methane/DME mixtures in an HCCI engine
TL;DR: In this article, a single-cylinder engine operated in homogeneous charge compression-ignition (HCCI) mode on a mixture of methane and air with dimethyl ether (DME) as a reactivityenhancing additive was used to generate synthesis gas.
Journal ArticleDOI
An experimental and modeling study on the reactivity of extremely fuel-rich methane/dimethyl ether mixtures
S. Porras,Dennis Kaczmarek,Jürgen Herzler,Simon Drost,M. Werler,Tina Kasper,Mustapha Fikri,Robert Schießl,Burak Atakan,Christof Schulz,Ulrich Maas +10 more
TL;DR: In this paper, an extended chemical kinetics mechanism was developed that also covers extremely fuel-rich conditions of methane/dimethyl ether mixtures, which is shown to predict well the ignition delay time and species concentration evolution measurements presented in this paper.
Journal ArticleDOI
Impact of shock-tube facility-dependent effects on incident- and reflected-shock conditions over a wide range of pressures and Mach numbers
Damien Nativel,Sean P. Cooper,Timo Lipkowicz,Mustapha Fikri,Eric L. Petersen,Christof Schulz +5 more
TL;DR: In this article, the authors investigated the influence of geometry and operating procedures on the performance of four geometrically different shock tubes located in two laboratories, Texas A&M University and the University of Duisburg-Essen.
Journal ArticleDOI
Flexible energy conversion and storage via high-temperature gas-phase reactions: The piston engine as a polygeneration reactor
Burak Atakan,Sebastian A. Kaiser,Jürgen Herzler,S. Porras,Kai Banke,Olaf Deutschmann,Tina Kasper,Mustapha Fikri,Robert Schießl,Dominik Schröder,Charlotte Rudolph,Dennis Kaczmarek,Hendrik Gossler,Simon Drost,Viatcheslav Bykov,Ulrich Maas,Christof Schulz +16 more
TL;DR: In this article, a systematic approach to poly-generation in piston engines, combining thermodynamics, kinetics, numerical optimization, engineering, and thermo-economics, is presented.
Journal ArticleDOI
Shock-tube study of methane pyrolysis in the context of energy-storage processes
TL;DR: In this article, the thermal decomposition of methane (10% in inert gases) was investigated behind reflected shock waves, and the results were compared to simulations based on three different literature mechanisms (Cai and Pitsch, 2015; Porras et al., 2017; Wang et al, 2007) as well as with the new rate constant of methane dissociation.
References
More filters
Journal ArticleDOI
A Comprehensive Modeling Study of iso-Octane Oxidation
TL;DR: In this paper, a detailed chemical kinetic mechanism has been developed and used to study the oxidation of iso-octane in a jet-stirred reactor, flow reactors, shock tubes and in a motored engine.
Journal ArticleDOI
Kinetic modeling of gasoline surrogate components and mixtures under engine conditions
TL;DR: In this article, an improved version of the kinetic model was used to analyze the combustion behavior of several components relevant to gasoline surrogate formulation, focusing attention on the mixing effects of the fuel components.
Journal ArticleDOI
An ignition delay and kinetic modeling study of methane, dimethyl ether, and their mixtures at high pressures
Ultan Burke,Kieran P. Somers,Peter O’Toole,Chis M. Zinner,Nicolas Marquet,Gilles Bourque,Eric L. Petersen,Wayne K. Metcalfe,Zeynep Serinyel,Henry J. Curran +9 more
TL;DR: In this article, both experimental and chemical kinetic model-predicted ignition delay time data are provided covering a range of conditions relevant to gas turbine environments (T = 600-1600 K, p = 7-41 K, ϕ ǫ = 0.3, 0.5, 1.0, and 2.0 in ‘air’ mixtures).
Journal ArticleDOI
A consistent chemical mechanism for oxidation of substituted aromatic species
TL;DR: In this paper, a consistent chemical mechanism to predict the high temperature combustion characteristics of toluene, styrene, ethylbenzene, 1,3-dimethylbenzenes (m-xylene), and 1-methylnaphthalene is presented.
Journal ArticleDOI
Optimized chemical mechanism for combustion of gasoline surrogate fuels
Liming Cai,Heinz Pitsch +1 more
TL;DR: In this article, a reduced combustion mechanism of primary reference fuel (PRF) mixtures (n-heptane and iso-octane) is integrated into the published kinetic model, allowing for the formulation of multi-component surrogate fuels (e.g. PRF/toluene) and for the prediction of Polycyclic Aromatic Hydrocarbon (PAH) formation in gasoline engines.
Related Papers (5)
Optimized chemical mechanism for combustion of gasoline surrogate fuels
Liming Cai,Heinz Pitsch +1 more