Mechanism and reaction rate of the Karl-Fischer titration reaction Part IV. First and second order catalytic currents at a rotating disk electrode

Verhoef, JC

doi:10.1016/0368-1874(78)85019-9

Cited by 2 publications

(2 citation statements)

References 3 publications

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“…Equation can be excluded in accordance with the experimental results. Verhoef et al conducted a series of experimental studies on kinetics and reaction rate of the Karl Fischer titration reactions. − If the reaction is a first-order reaction for SO 2 and I 2 /I 3 – , then the rate constant under different conditions can be measured by the pseudo-first-order reaction. The results demonstrated that the rate constant is sensitive to pH, and I – concentrations indicate that the intrinsic rate equation shall include items of the H + and I – concentrations.…”

Section: Theoretical Analysismentioning

confidence: 99%

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%

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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“…Moreover, they determined that titration reaction rate (k) depends on the pH of the solution [3][4][5][6][7]:…”

Section: Introductionmentioning

confidence: 99%

Determination of Water Content in Pyrolytic Tars Using Coulometric Karl-Fisher Titration

Jílková¹,

Hlinčík²,

Ciahotný³

2017

Acta Polytech

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Abstract. The liquid organic fraction of pyrolytic tar has a high energy value which makes possible its utilization as an energy source. However, before utilization, it is crucial to remove water from the liquid fraction. The presence of water reduces the energy value of pyrolytic tars. Water separation from the organic tar fraction is a complex process, since an emulsion can be readily formed. Therefore, after phase separation, it is important to know the residual water content in the organic phase and whether it is necessary to further dry it.The results presented in this manuscript focus on a water determination in liquid products from coal and biomass pyrolysis by a coulometric Karl-Fischer titration. The Coulometric Karl-Fischer titration is often used for a water content determination in gaseous, liquid and solid samples. However, to date, this titration method has not been used for a water determination in tars. A new water determination method, which has been tested on different types of tar, has been developed.The Coulometric Karl-Fischer titration is suitable for tar samples with a water content not greater than 5 wt%. The obtained experimental results indicate that the new introduced method can be used with a very good repeatability for a water content determination in tars.

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Mechanism and reaction rate of the Karl-Fischer titration reaction Part IV. First and second order catalytic currents at a rotating disk electrode

Cited by 2 publications

References 3 publications

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

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

Determination of Water Content in Pyrolytic Tars Using Coulometric Karl-Fisher Titration

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