Calculation of Activation Energy of Commercial Grade H&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;2 &lt;/sub&gt;from DSC for Using Evaluation Thermal Hazard

Anothairungrat, Suranee; Piyamongkala, Kowit

doi:10.4028/www.scientific.net/msf.990.127

Cited by 4 publications

(2 citation statements)

References 8 publications

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“…For example, Wang Jianna [20] and others studied the thermal decomposition characteristics and thermal risk of methyl hydrazine sulfate by differential scanning calorimetry (DSC), calculated the kinetic characteristics of the decomposition process by Friedman method, and considered that the decomposition process followed the n-order kinetic model. Yabei Xu et al [21] studied the Autocatalytic Decomposition Characteristics and thermal decomposition of benzoyl peroxide by differential scanning calorimetry (DSC), and calculated the kinetic parameters of the decomposition process by Kissinger method; Suranee [22] et al Evaluated the thermal hazard and reactivity of hydrogen peroxide with a mass concentration of 35% by DSC. It is found that the calculated activation energy is 70.03 kJ/mol, and the adiabatic temperature rise at heating rates of 2,4,8℃/min is 236.5,159.2,217.5k.…”

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confidence: 99%

Theoretical study on thermal decomposition mechanism of 1-nitroso-2-naphthol

Fan

yixiu

Miaowen

et al. 2022

Preprint

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1-nitroso-2-naphthol has thermal instability of thermal decomposition, spontaneous combustion and even explosion. Its thermal decomposition characteristics were tested by synchronous thermal analyzer (TGA/DSC); The activation energy of the thermal decomposition process was calculated by Kissinger method; The infrared absorption characteristic spectra of the gas products produced in the thermal decomposition process were measured by TGA/DSC-FTIR, and the thermal decomposition reaction process was speculated. The results show that the initial temperature (Tonset) of TGA exothermic decomposition of 1-nitroso-2 naphthol is between 129.01-155.69℃, and the faster the heating rate(β), the higher the Tonset, but the faster the thermal decomposition rate, the greater the heat release and the worse the thermal stability. The activation energy (E) of the thermal decomposition process is 83.323 kJ/mol calculated by Kissinger method. The dynamic test results of TGA/DSC-FTIR show that the main reaction of 1-nitroso-2 naphthol during heating is intermolecular dehydration to form ether, and the secondary reaction is decomposition into aliphatic nitro compounds, carbonyl compounds and amines. Sodium hydroxide will reduce the thermal stability of 1-nitroso-2 naphthol. After adding sodium hydroxide, the thermal decomposition process of 1-nitroso-2 naphthol has changed. The main reaction is that 1-nitroso-2-naphthol reacts with sodium hydroxide to produce sodium nitrophenol, which is further decomposed into aliphatic nitro compounds.

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mentioning

confidence: 99%

Theoretical study on thermal decomposition mechanism of 1-nitroso-2-naphthol

Fan

yixiu

Miaowen

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…For example, Xia, et al 20 and others studied the thermal decomposition characteristics and thermal risk of three anthraquinone hazardous waste by differential scanning calorimetry (DSC), calculated the kinetic characteristics of the decomposition process by Friedman method, and the effect of the coupling of phase transition and decomposition on the thermal risk of materials was studied. Yabei Xu et al 21 studied the Autocatalytic Decomposition Characteristics and thermal decomposition of benzoyl peroxide by differential scanning calorimetry (DSC), and calculated the kinetic parameters of the decomposition process by Kissinger method; Suranee et al 22 Evaluated the thermal hazard and reactivity of hydrogen peroxide with a mass concentration of 35% by DSC. It is found that the calculated activation energy is 70.03 kJ/mol, and the adiabatic temperature rise at heating rates of 2, 4, 8 °C/min is 236.5, 159.2, 217.5 k.…”

mentioning

confidence: 99%

Theoretical study on thermal decomposition mechanism of 1-nitroso-2-naphthol

Fan

yixiu

Miaowen

et al. 2022

Sci Rep

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Abstract1-nitroso-2-naphthol has thermal instability of thermal decomposition, spontaneous combustion and even explosion. Its thermal decomposition characteristics were tested by synchronous thermal analyzer (TGA/DSC); The activation energy of the thermal decomposition process was calculated by Kissinger method; The infrared absorption characteristic spectra of the gas products produced in the thermal decomposition process were measured by TGA/DSC-FTIR, and the thermal decomposition reaction process was speculated. The results show that the initial temperature (Tonset) of TGA exothermic decomposition of 1-nitroso-2 naphthol is between 129.01 and 155.69 °C, and the faster the heating rate(β), the higher the Tonset, but the faster the thermal decomposition rate, the greater the heat release and the worse the thermal stability. The activation energy (E) of the thermal decomposition process is 83.323 kJ/mol calculated by Kissinger method. The dynamic test results of TGA/DSC-FTIR show that the main reaction of 1-nitroso-2 naphthol during heating is intermolecular dehydration to form ether, and the secondary reaction is decomposition into aliphatic nitro compounds, carbonyl compounds and amines. Sodium hydroxide will reduce the thermal stability of 1-nitroso-2 naphthol. After adding sodium hydroxide, the thermal decomposition process of 1-nitroso-2 naphthol has changed. The main reaction is that 1-nitroso-2-naphthol reacts with sodium hydroxide to produce sodium nitrophenol, which is further decomposed into aliphatic nitro compounds. The research results have guiding significance for finding the reasonable conditions and temperature of 1-nitroso-2 naphthol during storage and transportation.

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The determination of the activation energy for a vibro-impact system under multiple excitations

2021

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In this paper, the stochastic stability of a Vibro-impact system with multiple excitation forces is studied. Due to the multiple external excitations, the probability density function (PDF) of the system is extremely difficult to solve. In addition, the existence of coexisting steady states is very common for the Vibro-impact system, and the perturbation of random noise will cause the transitions between the steady states. In this case, we are more interested in working out each attractor's activation energy, which is specifically used to characterize the attractor's stochastic stability, rather than the solution of the PDF.Based on the large deviation theory, the asymptotic analysis is carried out, and a time-varying Hamilton's equation for the quasi-potential is derived. To verify the effectiveness of the theoretical analysis, two detailed examples, where an impact attractor and a non-impactor coexist in the system, are conducted. By the application of the action plot method, the activation energies and the most probable exit paths (MPEP) for each attractor are derived. Compared with the numerical simulation, it shows very good agreement. Moreover, it is found that the existence of transient chaos near the attractor could seriously deteriorate the attractor's stability.

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Calculation of Activation Energy of Commercial Grade H<sub>2</sub>O<sub>2 </sub>from DSC for Using Evaluation Thermal Hazard

Cited by 4 publications

References 8 publications

Theoretical study on thermal decomposition mechanism of 1-nitroso-2-naphthol

Theoretical study on thermal decomposition mechanism of 1-nitroso-2-naphthol

Theoretical study on thermal decomposition mechanism of 1-nitroso-2-naphthol

The determination of the activation energy for a vibro-impact system under multiple excitations

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