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Cheng C, Wei Z, Ming X, Hu J, Kong R. Study on Reaction Mechanism and Process Safety for Epoxidation. ACS OMEGA 2023; 8:47254-47261. [PMID: 38107936 PMCID: PMC10720292 DOI: 10.1021/acsomega.3c07461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 10/18/2023] [Accepted: 11/16/2023] [Indexed: 12/19/2023]
Abstract
The reaction mechanism and process safety for epoxidation were investigated in this study. 1-(2-Chlorophenyl)-2-(4-fluorophenyl)-3-(1,2,4-triazole) propene (triazolene), a typical representative of high steric olefinic compounds, was chosen as the raw material. In addition, hydrogen peroxide was chosen as the oxygen source in the reaction. Online Raman spectroscopy combined with high-performance liquid chromatography (HPLC) was used for the process monitoring analysis. The results of this study indicated that the epoxidation process is exothermic, and the apparent reaction heat was 1340.0 kJ·kg-1 (measured by the mass of triazolene). The heat conversion rate was 39.7% immediately after hydrogen peroxide dosing to a triazolene and maleic anhydride mixture solution in chloroform. This result indicated that a considerable amount of heat is accumulated during the epoxidation reaction, which leads to a potential high safety concern. The study of the reaction mechanism showed that maleic anhydride reacts with hydrogen peroxide quickly to form maleic acid peroxide, which is controlled by hydrogen peroxide feeding, and the formed maleic acid peroxide further reacts with triazolenes slowly, which is a kinetically controlled reaction. Decomposition kinetics studies revealed that the temperatures corresponding to the time of maximum reaction rate for 8 and 24 h are TD24 = 89.9 °C and TD8 = 104.1 °C, respectively.
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Affiliation(s)
- Chunsheng Cheng
- Chemical Industry Safety
Technology & Engineering Center, Shenyang
Research Institute of Chemical Industry, Shenyang 110021, Liaoning, China
| | - Zhenyun Wei
- Chemical Industry Safety
Technology & Engineering Center, Shenyang
Research Institute of Chemical Industry, Shenyang 110021, Liaoning, China
| | - Xu Ming
- Chemical Industry Safety
Technology & Engineering Center, Shenyang
Research Institute of Chemical Industry, Shenyang 110021, Liaoning, China
| | - Jie Hu
- Chemical Industry Safety
Technology & Engineering Center, Shenyang
Research Institute of Chemical Industry, Shenyang 110021, Liaoning, China
| | - Rong Kong
- Chemical Industry Safety
Technology & Engineering Center, Shenyang
Research Institute of Chemical Industry, Shenyang 110021, Liaoning, China
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Orlova Y, Gambardella AA, Kryven I, Keune K, Iedema PD. Generative Algorithm for Molecular Graphs Uncovers Products of Oil Oxidation. J Chem Inf Model 2021; 61:1457-1469. [PMID: 33615781 PMCID: PMC7988456 DOI: 10.1021/acs.jcim.0c01163] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
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The autoxidation
of triglyceride (or triacylglycerol, TAG) is a
poorly understood complex system. It is known from mass spectrometry
measurements that, although initiated by a single molecule, this system
involves an abundance of intermediate species and a complex network
of reactions. For this reason, the attribution of the mass peaks to
exact molecular structures is difficult without additional information
about the system. We provide such information using a graph theory-based
algorithm. Our algorithm performs an automatic discovery of the chemical
reaction network that is responsible for the complexity of the mass
spectra in drying oils. This knowledge is then applied to match experimentally
measured mass spectra with computationally predicted molecular graphs.
We demonstrate this methodology on the autoxidation of triolein as
measured by electrospray ionization-mass spectrometry (ESI-MS). Our
protocol can be readily applied to investigate other oils and their
mixtures.
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Affiliation(s)
- Yuliia Orlova
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Amsterdam 1098 XH, The Netherlands
| | | | - Ivan Kryven
- Mathematical Institute, Utrecht University, Utrecht 3584 CD, The Netherlands.,Centre for Complex Systems Studies, Utrecht 3584 CE, The Netherlands
| | | | - Piet D Iedema
- Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Amsterdam 1098 XH, The Netherlands
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3
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Goldman MJ, Yee NW, Kroll JH, Green WH. Pressure-dependent kinetics of peroxy radicals formed in isobutanol combustion. Phys Chem Chem Phys 2020; 22:19802-19815. [PMID: 32844841 DOI: 10.1039/d0cp02872j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bio-derived isobutanol has been approved as a gasoline additive in the US, but our understanding of its combustion chemistry still has significant uncertainties. Detailed quantum calculations could improve model accuracy leading to better estimation of isobutanol's combustion properties and its environmental impacts. This work examines 47 molecules and 38 reactions involved in the first oxygen addition to isobutanol's three alkyl radicals located α, β, and γ to the hydroxide. Quantum calculations are mostly done at CCSD(T)-F12/cc-pVTZ-F12//B3LYP/CBSB7, with 1-D hindered rotor corrections obtained at B3LYP/6-31G(d). The resulting potential energy surfaces are the most comprehensive isobutanol peroxy networks published to date. Canonical transition state theory and a 1-D microcanonical master equation are used to derive high-pressure-limit and pressure-dependent rate coefficients, respectively. At all conditions studied, the recombination of γ-isobutanol radical with O2 forms HO2 + isobutanal. The recombination of β-isobutanol radical with O2 forms a stabilized hydroperoxy alkyl radical below 400 K, water + an alkoxy radical at higher temperatures, and HO2 + an alkene above 1200 K. The recombination of β-isobutanol radical with O2 results in a mixture of products between 700-1100 K, forming acetone + formaldehyde + OH at lower temperatures and forming HO2 + alkenes at higher temperatures. The barrier heights, high-pressure-limit rates, and pressure-dependent kinetics generally agree with the results from previous quantum chemistry calculations. Six reaction rates in this work deviate by over three orders of magnitude from kinetics in detailed models of isobutanol combustion, suggesting the rates calculated here can help improve modeling of isobutanol combustion and its environmental fate.
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Affiliation(s)
- Mark Jacob Goldman
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue E17-504, Cambridge, MA 02139, USA.
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Møller KH, Kurtén T, Bates KH, Thornton JA, Kjaergaard HG. Thermalized Epoxide Formation in the Atmosphere. J Phys Chem A 2019; 123:10620-10630. [DOI: 10.1021/acs.jpca.9b09364] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kristian H. Møller
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
| | - Theo Kurtén
- Department of Chemistry, University of Helsinki, POB 55, FIN-00014 Helsinki, Finland
| | - Kelvin H. Bates
- Center for the Environment, Harvard University, 29 Oxford Street, Cambridge, Massachusetts 02138, United States
| | - Joel A. Thornton
- Department of Atmospheric Sciences, University of Washington, Seattle, Washington 98195, United States
| | - Henrik G. Kjaergaard
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
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5
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Vernuccio S, Bickel EE, Gounder R, Broadbelt LJ. Microkinetic Model of Propylene Oligomerization on Brønsted Acidic Zeolites at Low Conversion. ACS Catal 2019. [DOI: 10.1021/acscatal.9b02066] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Sergio Vernuccio
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Elizabeth E. Bickel
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Rajamani Gounder
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Linda J. Broadbelt
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, Illinois 60208, United States
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6
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Vernuccio S, Broadbelt LJ. Discerning complex reaction networks using automated generators. AIChE J 2019. [DOI: 10.1002/aic.16663] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Sergio Vernuccio
- Department of Chemical and Biological Engineering Northwestern University Evanston Illinois
| | - Linda J. Broadbelt
- Department of Chemical and Biological Engineering Northwestern University Evanston Illinois
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Brydon RRO, Peng A, Qian L, Kung HH, Broadbelt LJ. Microkinetic Modeling of Homogeneous and Gold Nanoparticle-Catalyzed Oxidation of Cyclooctene. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b00315] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Robert R. O. Brydon
- Department of Chemical and Biological Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3120, United States
| | - Anyang Peng
- Department of Chemical and Biological Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3120, United States
| | - Linping Qian
- Department of Chemical and Biological Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3120, United States
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, 220 Handan Road, Shanghai 200433, China
| | - Harold H. Kung
- Department of Chemical and Biological Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3120, United States
| | - Linda J. Broadbelt
- Department of Chemical and Biological Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3120, United States
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Oakley LH, Casadio F, Shull KR, Broadbelt LJ. Examination of Mechanisms for Formation of Volatile Aldehydes from Oxidation of Oil-Based Systems. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b04168] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Francesca Casadio
- Department
of Conservation, Art Institute of Chicago, 111 South Michigan Avenue, Chicago, Illinois 60603, United States
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