Apparent kinetics of the Bunsen reaction in I2/HI solution for the iodine–sulfur hydrogen production process

Zhou, Chenglin; Zhang, Ping; Wang, Laijun; Chen, Songzhe

doi:10.1016/j.ijhydene.2017.04.117

Cited by 10 publications

(7 citation statements)

References 28 publications

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“…Experiments demonstrate that I 2 concentration will change the reaction rate. 21 Therefore, the first-level dissociation reaction of SO 2 is not a rate-determining step. Previous studies have revealed that the oxidation rate in elementary I 2 is higher than that in the complex iodine; therefore, complexation reaction M-2 is not the ratedetermining step.…”

Section: Theoretical Analysismentioning

confidence: 99%

“…The variations in pressure with time are recorded in-time. The experimental process and method are the same as those used in ref 21 inconsistent with a theoretical value. Therefore, eq 36 is unreliable, and the hypotheses that reactions M-3 and M-4 are rate-determining steps are false.…”

Section: Experimental Verification Of the Ratementioning

confidence: 99%

“…Wang and co-workers 19 reported that the activation energy value of the Bunsen reaction in the toluene system is 6.02 kJ/mol. Zhu, 16 Ying, 17 and Zhou 21 reported that the activation energy values of the Bunsen reaction are 9.212, 8.536, and 5.86 kJ/mol, respectively. In this work, the activation energy is 11.11 kJ/mol.…”

Section: Industrial and Engineering Chemistry Researchmentioning

confidence: 99%

“…The mass-transfer rate in the gas phase is calculated from the gas-state equation. The calculation method is the same as that in ref . …”

Section: Theoretical Analysismentioning

confidence: 99%

“…Li et al studied the apparent reaction rate of a gas–liquid–liquid multiphase system in toluene of a closed, fixed volume batch reactor through the initial rate analysis method; the total reaction rate was calculated by measuring changes in SO 2 pressure with time. We , studied the apparent kinetics of a reverse Bunsen reaction through the initial rate method, determined the apparent reaction orders and rate constant, and proposed the reaction rate expression. In addition, the gas–liquid apparent kinetics under homogeneous conditions was studied, and kinetics parameters such as reaction orders and activated energy were determined.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Building and Verifying a Model for Mass Transfer and Reaction Kinetics of the Bunsen Reaction in the Iodine–Sulfur Process

Zhou

Chen

Wang

et al. 2018

Ind. Eng. Chem. Res.

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The iodine–sulfur (IS) process is one of the most promising thermochemical water-splitting processes for nuclear hydrogen production. The Bunsen reaction, which produces sulfuric and hydriodic acids for two decomposition reactions, plays a crucial role in the IS process. Insufficient kinetics data and models of the Bunsen reaction have caused difficulties for designing a Bunsen reactor and optimizing and improving the efficiency of the process. The mass transfer and kinetics mechanism of the Bunsen reaction, which is a complicated gas–liquid slurry process, were first analyzed and proposed on the basis of double-film theory and thermodynamics calculation, and intrinsic reaction rate equation models were deduced with different hypothesized reaction mechanisms. Then, the models were further improved, and the experimental kinetics data were used to verify the models. Finally, a set of reaction rate equations was developed, thereby confirming its reliability for calculating the reaction kinetics data. The built models for mass transfer and reaction kinetics provide crucial information for the thorough understanding of the Bunsen reaction mechanism, selecting the reactor type, and designing the Bunsen reactor.

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Section: Theoretical Analysismentioning

confidence: 99%

Section: Experimental Verification Of the Ratementioning

confidence: 99%