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Matsugi A. Potential Nonstatistical Effects on the Unimolecular Decomposition of H 2O 2. J Phys Chem A 2022; 126:4482-4496. [PMID: 35766950 DOI: 10.1021/acs.jpca.2c03501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An attempt is made to evaluate the nonstatistical effects in the thermal decomposition of hydrogen peroxide (H2O2). Previous experimental studies on this reaction reported an unusual pressure dependence of the rate constant indicating broader falloff behavior than expected from conventional theory. In this work, the possibility that the rate constant is affected by nonstatistical effects is investigated based on classical trajectory calculations on the global potential energy surfaces of H2O2 and H2O2 + Ar. The emphasis is on the intramolecular energy redistribution from the K-rotor, that is, the external rotor for rotation around the principal axis of least moment of inertia. The calculations for the H2O2 molecules excited above the dissociation threshold suggest that the energy redistribution from the torsion and K-rotor to vibrations can be competitive with dissociation. In particular, the slow redistribution of the energy associated with the K-rotor significantly affects the dissociation rate. The successive trajectory calculations for collisions of H2O2 with Ar show that the energy associated with the K-rotor can be collisionally transferred more efficiently than the vibrational energy. On the basis of these results and several assumptions, a simple model is proposed to account for the nonstatistical effects on the pressure-dependent thermal rate constants. The model predicts significant broadening of the falloff curve of the rate constants but still cannot fully explain the experimental data.
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Affiliation(s)
- Akira Matsugi
- National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki 305-8569, Japan
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2
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Zhang X, Sangwan M, Yan C, Koshlyakov PV, Chesnokov EN, Bedjanian Y, Krasnoperov LN. Disproportionation Channel of the Self-reaction of Hydroxyl Radical, OH + OH → H 2O + O, Revisited. J Phys Chem A 2020; 124:3993-4005. [PMID: 32396004 DOI: 10.1021/acs.jpca.0c00624] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
The rate constant of the disproportionation channel 1a of the self-reaction of hydroxyl radicals OH + OH → H2O + O (1a) was measured at ambient temperature as well as over an extended temperature range to resolve the discrepancy between the IUPAC recommended value (k1a = 1.48 × 10-12 cm3 molecule-1 s-1, discharge flow system, Bedjanian et al. J. Phys. Chem. A 1999, 103, 7017) and a factor of ca. 1.8 higher value by pulsed laser photolysis (2.7 × 10-12 cm3 molecule-1 s-1, Bahng et al. J. Phys. Chem. A 2007, 111, 3850, and 2.52 × 10-12 cm3 molecule-1 s-1, Altinay et al. J. Phys. Chem. A 2014, 118, 38). To resolve this discrepancy, the rate constant of the title reaction was remeasured in three laboratories using two different experimental techniques, namely, laser-pulsed photolysis-transient UV absorption and fast discharge flow system coupled with mass spectrometry. Two different precursors were used to generate OH radicals in the laser-pulsed photolysis experiments. The experiments confirmed the low value of the rate constant at ambient temperature (k1a = (1.4 ± 0.2) × 10-12 cm3 molecule-1 s-1 at 295 K) as well as the V-shaped temperature dependence, negative at low temperatures and positive at high temperatures, with a turning point at 427 K: k1a = 8.38 × 10-14 × (T/300)1.99 × exp(855/T) cm3 molecule-1 s-1 (220-950 K). Recommended expression over the 220-2384 K temperature range: k1a = 2.68 × 10-14 × (T/300)2.75 × exp(1165/T) cm3 molecule-1 s-1 (220-2384 K).
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Affiliation(s)
- Xiaokai Zhang
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark 07102, New Jersey, United States
| | - Manuvesh Sangwan
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark 07102, New Jersey, United States
| | - Chao Yan
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark 07102, New Jersey, United States
| | - Pavel V Koshlyakov
- Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Evgeni N Chesnokov
- Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Yuri Bedjanian
- Institut de Combustion, Aérothermique, Réactivité et Environnement (ICARE), CNRS, Orléans 45071, Cedex 2, France
| | - Lev N Krasnoperov
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark 07102, New Jersey, United States
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3
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Sandhiya L, Zipse H. OO bond homolysis in hydrogen peroxide. J Comput Chem 2017; 38:2186-2192. [DOI: 10.1002/jcc.24870] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Revised: 05/11/2017] [Accepted: 06/13/2017] [Indexed: 11/08/2022]
Affiliation(s)
| | - Hendrik Zipse
- Department of Chemistry; LMU München; München D-81377 Germany
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4
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Yang L, Sonk JA, Barker JR. HO + OClO Reaction System: Featuring a Barrierless Entrance Channel with Two Transition States. J Phys Chem A 2015; 119:5723-31. [DOI: 10.1021/acs.jpca.5b03487] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lei Yang
- Department of Atmospheric,
Oceanic, and Space Sciences, University of Michigan, Ann Arbor, Michigan 48109-2143, United States
| | - Jason A. Sonk
- Department of Atmospheric,
Oceanic, and Space Sciences, University of Michigan, Ann Arbor, Michigan 48109-2143, United States
| | - John R. Barker
- Department of Atmospheric,
Oceanic, and Space Sciences, University of Michigan, Ann Arbor, Michigan 48109-2143, United States
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5
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Sajid MB, Es-sebbar E, Javed T, Fittschen C, Farooq A. Measurement of the Rate of Hydrogen Peroxide Thermal Decomposition in a Shock Tube Using Quantum Cascade Laser Absorption Near 7.7 μm. INT J CHEM KINET 2013. [DOI: 10.1002/kin.20827] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- M. B. Sajid
- Clean Combustion Research Center, Division of Physical Sciences and Engineering; King Abdullah University of Science and Technology; Thuwal 23955-6900 Saudi Arabia
| | - Et. Es-sebbar
- Clean Combustion Research Center, Division of Physical Sciences and Engineering; King Abdullah University of Science and Technology; Thuwal 23955-6900 Saudi Arabia
| | - T. Javed
- Clean Combustion Research Center, Division of Physical Sciences and Engineering; King Abdullah University of Science and Technology; Thuwal 23955-6900 Saudi Arabia
| | - C. Fittschen
- PC2A, University Lille 1; CNRS; Cité Scientifique, Bât. C11, 59655 Villeneuve d'Ascq France
| | - A. Farooq
- Clean Combustion Research Center, Division of Physical Sciences and Engineering; King Abdullah University of Science and Technology; Thuwal 23955-6900 Saudi Arabia
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7
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Sangwan M, Krasnoperov LN. Disproportionation Channel of Self-Reaction of Hydroxyl Radical, OH + OH → H2O + O, Studied by Time-Resolved Oxygen Atom Trapping. J Phys Chem A 2012; 116:11817-22. [DOI: 10.1021/jp308885j] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Manuvesh Sangwan
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, University Heights, Newark, New Jersey 07102, United States
| | - Lev N. Krasnoperov
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, University Heights, Newark, New Jersey 07102, United States
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8
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Troe J, Ushakov VG. The dissociation/recombination reaction CH4 (+M) ⇔ CH3 + H (+M): A case study for unimolecular rate theory. J Chem Phys 2012; 136:214309. [DOI: 10.1063/1.4717706] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
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9
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Wang C, Zhang DH, Skodje RT. A six-dimensional wave packet study of the vibrational overtone induced decomposition of hydrogen peroxide. J Chem Phys 2012; 136:164314. [PMID: 22559489 DOI: 10.1063/1.4705755] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Chunrui Wang
- Key State Laboratory of Molecular Reaction Dynamics and Center for Theoretical Computational Chemistry, Dalian Institute of Chemical Physics, Dalian 116023, China
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10
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Sangwan M, Chesnokov EN, Krasnoperov LN. Reaction OH + OH Studied over the 298–834 K Temperature and 1 - 100 bar Pressure Ranges. J Phys Chem A 2012; 116:6282-94. [DOI: 10.1021/jp211805v] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Manuvesh Sangwan
- Department of Chemistry
and Environmental Science, New Jersey Institute of Technology, University Heights, Newark, New Jersey
07102, United States
| | | | - Lev N. Krasnoperov
- Department of Chemistry
and Environmental Science, New Jersey Institute of Technology, University Heights, Newark, New Jersey
07102, United States
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11
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Lee C, Vranckx S, Heufer KA, Khomik SV, Uygun Y, Olivier H, Fernandez RX. On the Chemical Kinetics of Ethanol Oxidation: Shock Tube, Rapid Compression Machine and Detailed Modeling Study. ACTA ACUST UNITED AC 2011. [DOI: 10.1524/zpch.2012.0185] [Citation(s) in RCA: 101] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
Auto-ignition characteristics of ethanol were experimentally investigated using two Shock Tube (ST) facilities and a Rapid Compression Machine (RCM). Ignition delay times for stoichiometric ethanol-air mixtures were measured for temperatures between 775–1300 K in a High Pressure Shock Tube (HPST) at pressures close to 80 bar by probing pressure time histories and CH* emission. In some experiments the HPST was additionally employed for schlieren imaging to visualize ignition behavior by probing density gradients during ignition for ethanol-air mixtures. The ignition delay experiments in HPST were complemented by RCM measurements for extending the temperature regime to the Low Temperature Combustion (LTC) regime, down to 705 K, providing kinetic model validation data over a very wide temperature and pressure range. The current results also extend the earlier shock tube measurements performed in the same laboratory for pressures around 40 bar for temperatures down to 800 K [Heufer et al., Shock Waves 20 (2010) 307]. Furthermore, a Rectangular Shock Tube (RST) was solely used for additional schlieren imaging experiments to acquire information on ignition modes in stoichiometric ethanol-air mixtures around 10 bar. An improved chemical kinetic model was developed based on the Li et al. mechanism [Li et al., “Ethanol Model v1.0”, Princeton University, 2009] which was updated with evaluated rate parameters from the literature and validated through results obtained from the aforementioned facilities. The model predictions were compared to previously published low-pressure, premixed flat flame molecular beam mass spectrometry speciation data [Kasper et al., Combust. Flame 150 (2007) 220; Wang et al., J. Phys. Chem. A 112 (2008) 9255] where reasonable agreement is obtained considering the uncertainties in experiments and model. However, the model provides excellent agreement for the auto-ignition results obtained in the RCM and the high temperature shock induced ignition delays. Significant disparities with the model predictions are obtained for the shock tube results at temperatures below 1000 K as it transitions from the intermediate to the low temperature regime. The reasons for these deviations are assigned to strong fuel specific “pre-ignition” effects observed in ethanol auto-ignition, in contrast to other investigated fuels, which was satisfactorily explained through schlieren experimental results. To our knowledge this work is first of its kind that combines results from complementary experimental methods from three different facilities providing a holistic description on the auto-ignition behavior of ethanol. Furthermore, this paper reports ignition delay measurements for ethanol in air, at the highest pressures applicable to practical combustors.
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Affiliation(s)
- Changyoul Lee
- RWTH Aachen, Physico-Chemical Fundamentals of Combustion, Aachen, Deutschland
| | - Stijn Vranckx
- RWTH Aachen, Physico-Chemical Fundamentals of Combustion, Aachen, Deutschland
| | | | | | - Yasar Uygun
- RWTH Aachen, Shock Wave Laboratory, Aachen, Deutschland
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12
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Zhang P, Law CK. A fitting formula for the falloff curves of unimolecular reactions, II: Tunneling effects. INT J CHEM KINET 2010. [DOI: 10.1002/kin.20527] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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13
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Cobos CJ, Croce AE, Luther K, Troe J. Temperature and Pressure Dependence of the Reaction 2CF3 (+ M) ⇔ C2F6 (+ M). J Phys Chem A 2010; 114:4748-54. [DOI: 10.1021/jp9091464] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- C. J. Cobos
- INIFTA, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Argentina, Max-Planck-Institut für Biophysikalische Chemie, Am Fassberg 11, D-37077 Göttingen, Germany, and Institut für Physikalische Chemie, Universität Göttingen, Tammannstrassse 6, D-37077 Göttingen, Germany
| | - A. E. Croce
- INIFTA, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Argentina, Max-Planck-Institut für Biophysikalische Chemie, Am Fassberg 11, D-37077 Göttingen, Germany, and Institut für Physikalische Chemie, Universität Göttingen, Tammannstrassse 6, D-37077 Göttingen, Germany
| | - K. Luther
- INIFTA, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Argentina, Max-Planck-Institut für Biophysikalische Chemie, Am Fassberg 11, D-37077 Göttingen, Germany, and Institut für Physikalische Chemie, Universität Göttingen, Tammannstrassse 6, D-37077 Göttingen, Germany
| | - J. Troe
- INIFTA, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Argentina, Max-Planck-Institut für Biophysikalische Chemie, Am Fassberg 11, D-37077 Göttingen, Germany, and Institut für Physikalische Chemie, Universität Göttingen, Tammannstrassse 6, D-37077 Göttingen, Germany
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14
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Hong Z, Farooq A, Barbour EA, Davidson DF, Hanson RK. Hydrogen Peroxide Decomposition Rate: A Shock Tube Study Using Tunable Laser Absorption of H2O near 2.5 μm. J Phys Chem A 2009; 113:12919-25. [DOI: 10.1021/jp907219f] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Zekai Hong
- Department of Mechanical Engineering, Stanford University, Stanford, California 94305
| | - Aamir Farooq
- Department of Mechanical Engineering, Stanford University, Stanford, California 94305
| | - Ethan A. Barbour
- Department of Mechanical Engineering, Stanford University, Stanford, California 94305
| | - David F. Davidson
- Department of Mechanical Engineering, Stanford University, Stanford, California 94305
| | - Ronald K. Hanson
- Department of Mechanical Engineering, Stanford University, Stanford, California 94305
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15
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Sellevåg SR, Georgievskii Y, Miller JA. Kinetics of the Gas-Phase Recombination Reaction of Hydroxyl Radicals to Form Hydrogen Peroxide. J Phys Chem A 2009; 113:4457-67. [DOI: 10.1021/jp8110524] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Stig R. Sellevåg
- SINTEF Energy Research, N-7465 Trondheim, Norway, and Combustion Research Facility, Sandia National Laboratories, Livermore, California 94551-0969
| | - Yuri Georgievskii
- SINTEF Energy Research, N-7465 Trondheim, Norway, and Combustion Research Facility, Sandia National Laboratories, Livermore, California 94551-0969
| | - James A. Miller
- SINTEF Energy Research, N-7465 Trondheim, Norway, and Combustion Research Facility, Sandia National Laboratories, Livermore, California 94551-0969
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16
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Troe J, Ushakov VG. Anharmonic Rovibrational Numbers and Densities of States for HO2, H2CO, and H2O2. J Phys Chem A 2009; 113:3940-5. [DOI: 10.1021/jp8101964] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- J. Troe
- Institut für Physikalische Chemie, Universität Göttingen, Tammannstrasse 6, D-37077 Göttingen, Germany
| | - V. G. Ushakov
- Institut für Physikalische Chemie, Universität Göttingen, Tammannstrasse 6, D-37077 Göttingen, Germany
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