1
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Wang Z, Yan C, Mei B, Lin Y, Ju Y. Study of Low- and Intermediate-Temperature Oxidation Kinetics of Diethyl Ether in a Supercritical Pressure Jet-Stirred Reactor. J Phys Chem A 2023; 127:506-516. [PMID: 36602934 DOI: 10.1021/acs.jpca.2c06182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Growing demand for low-emission and high-efficiency propulsion systems spurs interest in understanding low-temperature and ultra-high-pressure combustion of alternative biofuels like diethyl ether (DEE). In this study, DEE oxidation experiments are performed at 10 and 100 atm, over a temperature range of 400-900 K, at fuel-lean, stoichiometric, and fuel-rich conditions by using a supercritical pressure jet-stirred reactor (SP-JSR). The experimental data show that DEE is very reactive and exhibits an uncommon low-temperature oxidation behavior with two negative temperature coefficient (NTC) zones. The first NTC zone is mainly governed by the competition reactions of QOOH + O2 = O2QOOH and QOOH = 2CH3CHO + OH, while the second one is mainly governed by the competition reactions of R + O2 = RO2 and the β-scission reaction of fuel radical R. It is shown that the increase of pressure stabilizes RO2 and promotes HO2 chemistry. Moreover, the branching ratios of β-scission reactions of R and QOOH decrease. As a result, it is shown that, with the increase of pressure, both NTC zones become weaker at 100 atm. In addition, the intermediate-temperature oxidation is shifted considerably to lower temperature at 100 atm. The existing DEE model in the literature well predicts the experimental data at low temperature; however, it underpredicts the fuel consumptions at intermediate temperature. The H2/O2 subset in the existing DEE model is updated in this study based on the Princeton updated HP-Mech, including the singlet/triplet competing channels of HO2 related reactions. The updated model improves the overall predictability of key species, especially at intermediate temperature.
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Affiliation(s)
- Ziyu Wang
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544, United States
| | - Chao Yan
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544, United States
| | - Bowen Mei
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544, United States
| | - Ying Lin
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544, United States
| | - Yiguang Ju
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544, United States
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2
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Hellmuth M, Chen B, Bariki C, Cai L, Cameron F, Wildenberg A, Huang C, Faller S, Ren Y, Beeckmann J, Leonhard K, Heufer KA, Hansen N, Pitsch H. A Comparative Study on the Combustion Chemistry of Two Bio-hybrid Fuels: 1,3-Dioxane and 1,3-Dioxolane. J Phys Chem A 2023; 127:286-299. [PMID: 36580040 DOI: 10.1021/acs.jpca.2c06576] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Bio-hybrid fuels are a promising solution to accomplish a carbon-neutral and low-emission future for the transportation sector. Two potential candidates are the heterocyclic acetals 1,3-dioxane (C4H8O2) and 1,3-dioxolane (C3H6O2), which can be produced from the combination of biobased feedstocks, carbon dioxide, and renewable electricity. In this work, comprehensive experimental and numerical investigations of 1,3-dioxane and 1,3-dioxolane were performed to support their application in internal combustion engines. Ignition delay times and laminar flame speeds were measured to reveal the combustion chemistry on the macroscale, while speciation measurements in a jet-stirred reactor and ethylene-based counterflow diffusion flames provided insights into combustion chemistry and pollutant formation on the microscale. Comparing the experimental and numerical data using either available or proposed kinetic models revealed that the combustion chemistry and pollutant formation differ substantially between 1,3-dioxane and 1,3-dioxolane, although their molecular structures are similar. For example, 1,3-dioxane showed higher reactivity in the low-temperature regime (500-800 K), while 1,3-dioxolane addition to ethylene increased polycyclic aromatic hydrocarbons and soot formation in high-temperature (>800 K) counterflow diffusion flames. Reaction pathway analyses were performed to examine and explain the differences between these two bio-hybrid fuels, which originate from the chemical bond dissociation energies in their molecular structures.
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Affiliation(s)
- Maximilian Hellmuth
- Institute for Combustion Technology, RWTH Aachen University, 52056Aachen, Germany
| | - Bingjie Chen
- Institute for Combustion Technology, RWTH Aachen University, 52056Aachen, Germany
| | - Chaimae Bariki
- Institute for Combustion Technology, RWTH Aachen University, 52056Aachen, Germany
| | - Liming Cai
- School for Automotive Studies, Tongji University, 201804Shanghai, China
| | - Florence Cameron
- Institute for Combustion Technology, RWTH Aachen University, 52056Aachen, Germany
| | - Alina Wildenberg
- Chair of High Pressure Gas Dynamics, Shock Wave Laboratory, RWTH Aachen University, 52056Aachen, Germany
| | - Can Huang
- Institute of Technical Thermodynamics, RWTH Aachen University, 52056Aachen, Germany
| | - Sebastian Faller
- Institute for Combustion Technology, RWTH Aachen University, 52056Aachen, Germany
| | - Yihua Ren
- Institute for Combustion Technology, RWTH Aachen University, 52056Aachen, Germany
| | - Joachim Beeckmann
- Institute for Combustion Technology, RWTH Aachen University, 52056Aachen, Germany
| | - Kai Leonhard
- Institute of Technical Thermodynamics, RWTH Aachen University, 52056Aachen, Germany
| | - Karl Alexander Heufer
- Chair of High Pressure Gas Dynamics, Shock Wave Laboratory, RWTH Aachen University, 52056Aachen, Germany
| | - Nils Hansen
- Combustion Research Facility, Sandia National Laboratories, Livermore, California94551, United States
| | - Heinz Pitsch
- Institute for Combustion Technology, RWTH Aachen University, 52056Aachen, Germany
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3
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Couch DE, Mulvihill CR, Sivaramakrishnan R, Au K, Taatjes CA, Sheps L. Quantification of Key Peroxy and Hydroperoxide Intermediates in the Low-Temperature Oxidation of Dimethyl Ether. J Phys Chem A 2022; 126:9497-9509. [DOI: 10.1021/acs.jpca.2c06959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- David E. Couch
- Combustion Research Facility, Sandia National Laboratories, Livermore, California94551, United States
| | - Clayton R. Mulvihill
- Chemical Sciences and Engineering, Argonne National Laboratory, Lemont, Illinois60439, United States
| | - Raghu Sivaramakrishnan
- Chemical Sciences and Engineering, Argonne National Laboratory, Lemont, Illinois60439, United States
| | - Kendrew Au
- Combustion Research Facility, Sandia National Laboratories, Livermore, California94551, United States
| | - Craig A. Taatjes
- Combustion Research Facility, Sandia National Laboratories, Livermore, California94551, United States
| | - Leonid Sheps
- Combustion Research Facility, Sandia National Laboratories, Livermore, California94551, United States
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4
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Qiu Z, Zhong A, Huang Z, Han D. An experimental and modeling study on polyoxymethylene dimethyl ether 3 (PODE3) oxidation in a jet stirred reactor. FUNDAMENTAL RESEARCH 2022. [DOI: 10.1016/j.fmre.2021.09.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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5
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Marrodán L, Millera Á, Bilbao R, Alzueta MU. Experimental and Modeling Evaluation of Dimethoxymethane as an Additive for High-Pressure Acetylene Oxidation. J Phys Chem A 2022; 126:6253-6263. [PMID: 36048461 PMCID: PMC9483988 DOI: 10.1021/acs.jpca.2c03130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
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The high-pressure oxidation of acetylene–dimethoxymethane
(C2H2–DMM) mixtures in a tubular flow
reactor has been analyzed from both experimental and modeling perspectives.
In addition to pressure (20, 40, and 60 bar), the influence of the
oxygen availability (by modifying the air excess ratio, λ) and
the presence of DMM (two different concentrations have been tested,
70 and 280 ppm, for a given concentration of C2H2 of 700 ppm) have also been analyzed. The chemical kinetic mechanism,
progressively built by our research group in the last years, has been
updated with recent theoretical calculations for DMM and validated
against the present results and literature data. Results indicate
that, under fuel-lean conditions, adding DMM enhances C2H2 reactivity by increased radical production through
DMM chain branching pathways, more evident for the higher concentration
of DMM. H-abstraction reactions with OH radicals as the main abstracting
species to form dimethoxymethyl (CH3OCHOCH3)
and methoxymethoxymethyl (CH3OCH2OCH2) radicals are the main DMM consumption routes, with the first one
being slightly favored. There is a competition between β-scission
and O2-addition reactions in the consumption of both radicals
that depends on the oxygen availability. As the O2 concentration
in the reactant mixture is increased, the O2-addition reactions
become more relevant. The effect of the addition of several oxygenates,
such as ethanol, dimethyl ether (DME), or DMM, on C2H2 high-pressure oxidation has been compared. Results indicate
that ethanol has almost no effect, whereas the addition of an ether,
DME or DMM, shifts the conversion of C2H2 to
lower temperatures.
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Affiliation(s)
- Lorena Marrodán
- Aragón Institute of Engineering Research (I3A), Department of Chemical and Environmental Engineering, University of Zaragoza, R+D building, Río Ebro Campus, 50018 Zaragoza, Spain
| | - Ángela Millera
- Aragón Institute of Engineering Research (I3A), Department of Chemical and Environmental Engineering, University of Zaragoza, R+D building, Río Ebro Campus, 50018 Zaragoza, Spain
| | - Rafael Bilbao
- Aragón Institute of Engineering Research (I3A), Department of Chemical and Environmental Engineering, University of Zaragoza, R+D building, Río Ebro Campus, 50018 Zaragoza, Spain
| | - María U Alzueta
- Aragón Institute of Engineering Research (I3A), Department of Chemical and Environmental Engineering, University of Zaragoza, R+D building, Río Ebro Campus, 50018 Zaragoza, Spain
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6
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Jin Y, Zhou Q, Geng J, Meng Q, Wei Z, Ding M, Zhou J, Zeng Y, Cao W, Liu F, Yu Y. Sonodynamic Effects of a Novel Ether-Group Modified Porphyrin Derivative Combined With Pulsed Low-Intensity Ultrasound on PC-9 Cells. Front Pharmacol 2021; 12:792360. [PMID: 34938196 PMCID: PMC8685451 DOI: 10.3389/fphar.2021.792360] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2021] [Accepted: 11/22/2021] [Indexed: 01/31/2023] Open
Abstract
Sonodynamic therapy (SDT) is a developing modality for cancer treatment based on the synergistic effect of ultrasound and chemical compounds which are known as sonosensitizers. The development of more efficient sonosensitizers has become an urgent issue in this field. In this study, a novel porphyrin derivative (BBTPP) mediated SDT was evaluated on PC-9 cells. Pulsed low-intensity ultrasound (PLIU) was used for its little thermal and mechanical damage. The accumulation of drugs in cells was evaluated through porphyrin fluorescence, and the cytotoxicity of BBTPP was evaluated using a cell counting kit-8 assay. The sonodynamic effect was investigated by Hoechst 33342/PI and Annexin V-FITC/PI double staining, which showed an apoptotic rate of 18.87% in the BBTPP-SDT group, as compared with 1.71%, 1.4%, 1.57%, 3.61%, 11.18% in the control, BBTPP, hematoporphyrin monomethyl ether (HMME), ultrasound, and HMME-SDT groups, respectively. The sono-toxic effect of BBTPP was significantly superior to HMME. Our results showed that BBTPP-SDT resulted in much higher intracellular reactive oxygen species (ROS) and lipid peroxidation levels which were evaluated by 2′,7′-dichlorodihydrofluorescein diacetate (H2DCFDA) and Liperfluo assay, respectively. The expressions of Bax, Bcl-2, caspase-9, caspase-8, and cleaved caspase-3 proteins were evaluated to investigate the apoptotic mechanism of BBTPP-SDT. The results of this study showed that the combination of BBTPP and PLIU induced the generation of ROS, resulting in lipid peroxidation, and activated both the extrinsic and intrinsic apoptotic pathways of PC-9 cells. Our results also suggested that the ether group introduced in the side chain of porphyrin could enhance the sono-toxicity of porphyrin-based sensitizers under the sonication of PLIU. These results supported the possibility of BBTPP as a promising sonosensitizer, and an appropriate side chain could enhance the sono-sensitivity of porphyrins.
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Affiliation(s)
- Yinghua Jin
- Department of Medical Oncology, Harbin Medical University Cancer Hospital, Harbin, China
| | - Qi Zhou
- Department of Instrument Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shang Hai, China
| | - Jianxiong Geng
- Department of Medical Oncology, Harbin Medical University Cancer Hospital, Harbin, China
| | - Qingwei Meng
- Department of Medical Oncology, Harbin Medical University Cancer Hospital, Harbin, China
| | - Zixin Wei
- Department of Medical Oncology, Harbin Medical University Cancer Hospital, Harbin, China
| | - Meijuan Ding
- Department of Medical Oncology, Harbin Medical University Cancer Hospital, Harbin, China
| | - Jing Zhou
- Department of Medical Oncology, Harbin Medical University Cancer Hospital, Harbin, China
| | - Yuan Zeng
- Department of Medical Oncology, Harbin Medical University Cancer Hospital, Harbin, China
| | - Wenwu Cao
- Department of Mathematics, The Materials Research Institute, Pennsylvania State University, University Park, PA, United States.,Condensed Matter Science and Technology Institute and School of Instrumentation Science and Engineering, Harbin Institute of Technology, Harbin, China
| | - Fang Liu
- Department of Medical Oncology, Harbin Medical University Cancer Hospital, Harbin, China
| | - Yan Yu
- Department of Medical Oncology, Harbin Medical University Cancer Hospital, Harbin, China
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7
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Mechanism investigation on the reaction of methylmethoxy radical with nitrogen monoxide. Struct Chem 2021. [DOI: 10.1007/s11224-021-01733-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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8
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Lauriola DK, Rahman KA, Stauffer HU, Slipchenko MN, Meyer TR, Roy S. Concentration and pressure scaling of CH 2O electronic-resonance-enhanced coherent anti-Stokes Raman scattering signals. APPLIED OPTICS 2021; 60:1051-1058. [PMID: 33690411 DOI: 10.1364/ao.415496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Accepted: 12/30/2020] [Indexed: 06/12/2023]
Abstract
Nanosecond electronic-resonance-enhanced coherent anti-Stokes Raman scattering (ERE-CARS) is evaluated for the measurement of formaldehyde (CH2O) concentrations in reacting and nonreacting conditions. The three-color scheme utilizes a 532 nm pump beam and a scanned Stokes beam near 624 nm for Raman excitation of the C-H symmetric stretch (ν1) vibrational mode; further, a 342 nm resonant probe is tuned to produce the outgoing CARS signal via the 101403 vibronic transition between the ground (X~1A1) and first excited (A~1A2) electronic states. This allows detection of CH2O at concentrations as low as 9×1014molecules/cm3 (55 parts per million) in a calibration cell with CH2O and N2 at 1 bar and 450 K with 3% uncertainty. The measurements show a quadratic dependence of the signal with CH2O number density. Pressure scaling experiments up to 11 bar in the calibration cell show an increase in signal up to 8 bar. We study pressure dependence up to 11 bar and further apply the technique to characterize the CH2O concentration in an atmospheric premixed dimethyl ether/air McKenna burner flame, with a maximum concentration uncertainty of 11%. This approach demonstrates the feasibility for spatially resolved measurements of minor species such as CH2O in reactive environments and shows promise for application in high-pressure combustors.
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9
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Kohse-Höinghaus K. Combustion in the future: The importance of chemistry. PROCEEDINGS OF THE COMBUSTION INSTITUTE. INTERNATIONAL SYMPOSIUM ON COMBUSTION 2020; 38:S1540-7489(20)30501-0. [PMID: 33013234 PMCID: PMC7518234 DOI: 10.1016/j.proci.2020.06.375] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2019] [Revised: 05/18/2020] [Accepted: 06/28/2020] [Indexed: 06/11/2023]
Abstract
Combustion involves chemical reactions that are often highly exothermic. Combustion systems utilize the energy of chemical compounds released during this reactive process for transportation, to generate electric power, or to provide heat for various applications. Chemistry and combustion are interlinked in several ways. The outcome of a combustion process in terms of its energy and material balance, regarding the delivery of useful work as well as the generation of harmful emissions, depends sensitively on the molecular nature of the respective fuel. The design of efficient, low-emission combustion processes in compliance with air quality and climate goals suggests a closer inspection of the molecular properties and reactions of conventional, bio-derived, and synthetic fuels. Information about flammability, reaction intensity, and potentially hazardous combustion by-products is important also for safety considerations. Moreover, some of the compounds that serve as fuels can assume important roles in chemical energy storage and conversion. Combustion processes can furthermore be used to synthesize materials with attractive properties. A systematic understanding of the combustion behavior thus demands chemical knowledge. Desirable information includes properties of the thermodynamic states before and after the combustion reactions and relevant details about the dynamic processes that occur during the reactive transformations from the fuel and oxidizer to the products under the given boundary conditions. Combustion systems can be described, tailored, and improved by taking chemical knowledge into account. Combining theory, experiment, model development, simulation, and a systematic analysis of uncertainties enables qualitative or even quantitative predictions for many combustion situations of practical relevance. This article can highlight only a few of the numerous investigations on chemical processes for combustion and combustion-related science and applications, with a main focus on gas-phase reaction systems. It attempts to provide a snapshot of recent progress and a guide to exciting opportunities that drive such research beyond fossil combustion.
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Key Words
- 2M2B, 2-methyl-2-butene
- AFM, atomic force microscopy
- ALS, Advanced Light Source
- APCI, atmospheric pressure chemical ionization
- ARAS, atomic resonance absorption spectroscopy
- ATcT, Active Thermochemical Tables
- BC, black carbon
- BEV, battery electric vehicle
- BTL, biomass-to-liquid
- Biofuels
- CA, crank angle
- CCS, carbon capture and storage
- CEAS, cavity-enhanced absorption spectroscopy
- CFD, computational fluid dynamics
- CI, compression ignition
- CRDS, cavity ring-down spectroscopy
- CTL, coal-to-liquid
- Combustion
- Combustion chemistry
- Combustion diagnostics
- Combustion kinetics
- Combustion modeling
- Combustion synthesis
- DBE, di-n-butyl ether
- DCN, derived cetane number
- DEE, diethyl ether
- DFT, density functional theory
- DFWM, degenerate four-wave mixing
- DMC, dimethyl carbonate
- DME, dimethyl ether
- DMM, dimethoxy methane
- DRIFTS, diffuse reflectance infrared Fourier transform spectroscopy
- EGR, exhaust gas recirculation
- EI, electron ionization
- Emissions
- Energy
- Energy conversion
- FC, fuel cell
- FCEV, fuel cell electric vehicle
- FRET, fluorescence resonance energy transfer
- FT, Fischer-Tropsch
- FTIR, Fourier-transform infrared
- Fuels
- GC, gas chromatography
- GHG, greenhouse gas
- GTL, gas-to-liquid
- GW, global warming
- HAB, height above the burner
- HACA, hydrogen abstraction acetylene addition
- HCCI, homogeneous charge compression ignition
- HFO, heavy fuel oil
- HRTEM, high-resolution transmission electron microscopy
- IC, internal combustion
- ICEV, internal combustion engine vehicle
- IE, ionization energy
- IPCC, Intergovernmental Panel on Climate Change
- IR, infrared
- JSR, jet-stirred reactor
- KDE, kernel density estimation
- KHP, ketohydroperoxide
- LCA, lifecycle analysis
- LH2, liquid hydrogen
- LIF, laser-induced fluorescence
- LIGS, laser-induced grating spectroscopy
- LII, laser-induced incandescence
- LNG, liquefied natural gas
- LOHC, liquid organic hydrogen carrier
- LT, low-temperature
- LTC, low-temperature combustion
- MBMS, molecular-beam MS
- MDO, marine diesel oil
- MS, mass spectrometry
- MTO, methanol-to-olefins
- MVK, methyl vinyl ketone
- NOx, nitrogen oxides
- NTC, negative temperature coefficient
- OME, oxymethylene ether
- OTMS, Orbitrap MS
- PACT, predictive automated computational thermochemistry
- PAH, polycyclic aromatic hydrocarbon
- PDF, probability density function
- PEM, polymer electrolyte membrane
- PEPICO, photoelectron photoion coincidence
- PES, photoelectron spectrum/spectra
- PFR, plug-flow reactor
- PI, photoionization
- PIE, photoionization efficiency
- PIV, particle imaging velocimetry
- PLIF, planar laser-induced fluorescence
- PM, particulate matter
- PM10 PM2,5, sampled fractions with sizes up to ∼10 and ∼2,5 µm
- PRF, primary reference fuel
- QCL, quantum cascade laser
- RCCI, reactivity-controlled compression ignition
- RCM, rapid compression machine
- REMPI, resonance-enhanced multi-photon ionization
- RMG, reaction mechanism generator
- RON, research octane number
- Reaction mechanisms
- SI, spark ignition
- SIMS, secondary ion mass spectrometry
- SNG, synthetic natural gas
- SNR, signal-to-noise ratio
- SOA, secondary organic aerosol
- SOEC, solid-oxide electrolysis cell
- SOFC, solid-oxide fuel cell
- SOx, sulfur oxides
- STM, scanning tunneling microscopy
- SVO, straight vegetable oil
- Synthetic fuels
- TDLAS, tunable diode laser absorption spectroscopy
- TOF-MS, time-of-flight MS
- TPES, threshold photoelectron spectrum/spectra
- TPRF, toluene primary reference fuel
- TSI, threshold sooting index
- TiRe-LII, time-resolved LII
- UFP, ultrafine particle
- VOC, volatile organic compound
- VUV, vacuum ultraviolet
- WLTP, Worldwide Harmonized Light Vehicle Test Procedure
- XAS, X-ray absorption spectroscopy
- YSI, yield sooting index
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Herbinet O, Husson B, Le Gall H, Battin‐Leclerc F. An experimental and modeling study of the oxidation of
n‐
heptane, ethylbenzene, and
n‐
butylbenzene in a jet‐stirred reactor at pressures up to 10 bar. INT J CHEM KINET 2020. [DOI: 10.1002/kin.21417] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Benoit Husson
- Université de Lorraine CNRS, LRGP Nancy F‐54000 France
| | - Hervé Le Gall
- Université de Lorraine CNRS, LRGP Nancy F‐54000 France
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11
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Salta Z, Liaska S, Papayannis DK, Lesar A, Kosmas AM. Computational studies on the reactions of the peroxy radical CF3OCH2O2 with HO2 and NO. COMPUT THEOR CHEM 2019. [DOI: 10.1016/j.comptc.2019.112510] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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12
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Marrodán L, Song Y, Herbinet O, Alzueta MU, Fittschen C, Ju Y, Battin-Leclerc F. First detection of a key intermediate in the oxidation of fuel + NO systems: HONO. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2019.01.038] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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13
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Abstract
Abstract
Current topics in combustion chemistry include aspects of a changing fuel spectrum with a focus on reducing emissions and increasing efficiency. This article is intended to provide an overview of selected recent work in combustion chemistry, especially addressing reaction pathways from fuel decomposition to emissions. The role of the molecular fuel structure will be emphasized for the formation of certain regulated and unregulated species from individual fuels and their mixtures, exemplarily including fuel compounds such as alkanes, alkenes, ethers, alcohols, ketones, esters, and furan derivatives. Depending on the combustion conditions, different temperature regimes are important and can lead to different reaction classes. Laboratory reactors and flames are prime sources and targets from which such detailed chemical information can be obtained and verified with a number of advanced diagnostic techniques, often supported by theoretical work and simulation with combustion models developed to transfer relevant details of chemical mechanisms into practical applications. Regarding the need for cleaner combustion processes, some related background and perspectives will be provided regarding the context for future chemistry research in combustion energy science.
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Affiliation(s)
- Katharina Kohse-Höinghaus
- Department of Chemistry , Bielefeld University , Universitätsstraße 25 , Bielefeld D-33615 , Germany , Phone: +49 5211062052
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14
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Rodriguez A, Herbinet O, Meng X, Fittschen C, Wang Z, Xing L, Zhang L, Battin-Leclerc F. Hydroperoxide Measurements During Low-Temperature Gas-Phase Oxidation of n-Heptane and n-Decane. J Phys Chem A 2017; 121:1861-1876. [DOI: 10.1021/acs.jpca.6b10378] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Anne Rodriguez
- Laboratoire
de Réactions et Génie des Procédés, CNRS−Université de Lorraine, ENSIC, 1 rue Grandville, 54001 Nancy, France
| | - Olivier Herbinet
- Laboratoire
de Réactions et Génie des Procédés, CNRS−Université de Lorraine, ENSIC, 1 rue Grandville, 54001 Nancy, France
| | - Xiangzan Meng
- Laboratoire
de Réactions et Génie des Procédés, CNRS−Université de Lorraine, ENSIC, 1 rue Grandville, 54001 Nancy, France
- State
Key Laboratory of Engines, Tianjin University, Tianjin 300072, China
| | - Christa Fittschen
- Université
Lille, CNRS, UMR 8522 - PC2A - Physicochimie des Processus de Combustion et de l’Atmosphère, F−59000 Lille, France
| | - Zhandong Wang
- National
Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, P. R. China
| | - Lili Xing
- National
Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, P. R. China
| | - Lidong Zhang
- National
Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, P. R. China
| | - Frédérique Battin-Leclerc
- Laboratoire
de Réactions et Génie des Procédés, CNRS−Université de Lorraine, ENSIC, 1 rue Grandville, 54001 Nancy, France
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15
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Moshammer K, Jasper AW, Popolan-Vaida DM, Wang Z, Bhavani Shankar VS, Ruwe L, Taatjes CA, Dagaut P, Hansen N. Quantification of the Keto-Hydroperoxide (HOOCH2OCHO) and Other Elusive Intermediates during Low-Temperature Oxidation of Dimethyl Ether. J Phys Chem A 2016; 120:7890-7901. [DOI: 10.1021/acs.jpca.6b06634] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kai Moshammer
- Combustion
Research Facility, Sandia National Laboratories, Livermore, California 94551, United States
| | - Ahren W. Jasper
- Combustion
Research Facility, Sandia National Laboratories, Livermore, California 94551, United States
| | - Denisia M. Popolan-Vaida
- Department
of
Chemistry, University of California—Berkeley, and Chemical
Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Zhandong Wang
- King
Abdullah University of Science and Technology (KAUST), Clean Combustion Research Center (CCRC), Thuwal 23955-6900, Saudi Arabia
| | - Vijai Shankar Bhavani Shankar
- King
Abdullah University of Science and Technology (KAUST), Clean Combustion Research Center (CCRC), Thuwal 23955-6900, Saudi Arabia
| | - Lena Ruwe
- Department
of Chemistry, Bielefeld University, D-33615 Bielefeld, Germany
| | - Craig A. Taatjes
- Combustion
Research Facility, Sandia National Laboratories, Livermore, California 94551, United States
| | - Philippe Dagaut
- Centre National
de la Recherche Scientifique (CNRS-INSIS), ICARE, 45071 Orléans Cedex 2, France
| | - Nils Hansen
- Combustion
Research Facility, Sandia National Laboratories, Livermore, California 94551, United States
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16
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Wang S, Wang L. The atmospheric oxidation of dimethyl, diethyl, and diisopropyl ethers. The role of the intramolecular hydrogen shift in peroxy radicals. Phys Chem Chem Phys 2016; 18:7707-14. [PMID: 26907474 DOI: 10.1039/c5cp07199b] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The atmospheric oxidation mechanisms of dimethyl ether (DME), diethyl ether (DEE) and diisopropyl ether (DiPE) are studied by using quantum chemistry and unimolecular reaction theory (RRKM-ME) calculations. For the peroxy radical CH3OCH2O2˙ from DME, a barrier height of ∼ 85 kJ mol(-1) is found for its intramolecular H-shift to ˙CH2OCH2OOH, which can recombine rapidly with the atmospheric O2. RRKM-ME calculations obtain an effective rate of ∼ 0.1 s(-1) at 298 K for the formation of ˙O2CH2OCH2OOH. For similar radicals in DEE and DiPE, effective rates are 1.6 s(-1) and 1.1 s(-1), respectively. In the atmosphere, these unimolecular reactions are fast enough to compete with the bimolecular reactions with NO and/or HO2, especially when [NO] is low. The fates of radicals after the H-shifts are also examined here. Several subsequent reactions are found to recycle OH radicals. New mechanisms are proposed on the basis of present calculations and are consistent with previous experimental results. In the atmosphere, the routes via H-shifts represent an auto-oxidation of these ethers with no involvement of NOx and therefore no O3 formation, and also a self-cleaning mechanism of organic compounds due to recycling of OH radicals. Some of the end products are highly oxidized with multifunctional groups and high O : C ratios, suggesting their low volatility and potential contribution to secondary organic aerosols.
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Affiliation(s)
- Sainan Wang
- School of Chemistry & Chemical Engineering, South China University of Technology, Guangzhou, 510640, China.
| | - Liming Wang
- School of Chemistry & Chemical Engineering, South China University of Technology, Guangzhou, 510640, China. and Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, South China University of Technology, Guangzhou 510006, China
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17
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Zhang W, Du B. Quantum chemical study of the ( Z)-2-penten-1-ol (HOCH 2–CH = CHCH 2CH 3) + OH + O 2 reactions. Mol Phys 2016. [DOI: 10.1080/00268976.2016.1224394] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Weichao Zhang
- College of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, Jiangsu, People's Republic of China
| | - Benni Du
- College of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, Jiangsu, People's Republic of China
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18
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Stone D, Blitz M, Ingham T, Onel L, Medeiros DJ, Seakins PW. An instrument to measure fast gas phase radical kinetics at high temperatures and pressures. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2016; 87:054102. [PMID: 27250442 DOI: 10.1063/1.4950906] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Fast radical reactions are central to the chemistry of planetary atmospheres and combustion systems. Laser-induced fluorescence is a highly sensitive and selective technique that can be used to monitor a number of radical species in kinetics experiments, but is typically limited to low pressure systems owing to quenching of fluorescent states at higher pressures. The design and characterisation of an instrument are reported using laser-induced fluorescence detection to monitor fast radical kinetics (up to 25 000 s(-1)) at high temperatures and pressures by sampling from a high pressure reaction region to a low pressure detection region. Kinetics have been characterised at temperatures reaching 740 K and pressures up to 2 atm, with expected maximum operational conditions of up to ∼900 K and ∼5 atm. The distance between the point of sampling from the high pressure region and the point of probing within the low pressure region is critical to the measurement of fast kinetics. The instrumentation described in this work can be applied to the measurement of kinetics relevant to atmospheric and combustion chemistry.
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Affiliation(s)
- Daniel Stone
- School of Chemistry, University of Leeds, Leeds, United Kingdom
| | - Mark Blitz
- School of Chemistry, University of Leeds, Leeds, United Kingdom
| | - Trevor Ingham
- School of Chemistry, University of Leeds, Leeds, United Kingdom
| | - Lavinia Onel
- School of Chemistry, University of Leeds, Leeds, United Kingdom
| | | | - Paul W Seakins
- School of Chemistry, University of Leeds, Leeds, United Kingdom
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