Deactivation Kinetics Model of H<sub>2</sub>S Removal over Mesoporous LaFeO<sub>3</sub>/MCM-41 Sorbent during Hot Coal Gas Desulfurization

Hong, Yong Son; Zhang, Z. F.; Cai, Zhe; Zhao, Xueshuang; Liu, B. S.

doi:10.1021/ef5008825

Cited by 26 publications

(19 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In order to find these parameters, Equations (17)- (20) are solved simultaneously and the obtained breakthrough curve from the model is compared to experimental data. A simplification of the mathematical problem can be derived by neglecting axial dispersion and assuming quasi-steady state conditions in the bed [99,116,117]. The latter implies that the changes of concentration in time are substantially smaller compared to the changes of concentration along the bed.…”

Section: Lumped Modelmentioning

confidence: 99%

Removal of Hydrogen Sulfide with Metal Oxides in Packed Bed Reactors—A Review from a Modeling Perspective with Practical Implications

Sadegh-Vaziri

Bäbler

2019

Applied Sciences

View full text Add to dashboard Cite

Sulfur, and in particular, H 2 S removal is of significant importance in gas cleaning processes in different applications, including biogas production and biomass gasification. H 2 S removal with metal oxides is one of the most viable alternatives to achieve deep desulfurization. This process is usually conducted in a packed bed configuration in order to provide a high solid surface area in contact with the gas stream per unit of volume. The operating temperature of the process could be as low as room temperature, which is the case in biogas production plants or as high as 900 ∘ C suitable for gasification processes. Depending on the operating temperature and the cleaning requirement, different metal oxides can be used including oxides of Ca, Fe, Cu, Mn and Zn. In this review, the criteria for the design and scale-up of a packed bed units are reviewed and simple relations allowing for quick assessment of process designs and experimental data are presented. Furthermore, modeling methods for the numerical simulation of a packed bed adsorber are discussed.

show abstract

Section: Lumped Modelmentioning

confidence: 99%

Removal of Hydrogen Sulfide with Metal Oxides in Packed Bed Reactors—A Review from a Modeling Perspective with Practical Implications

Sadegh-Vaziri

Bäbler

2019

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…We had proposed DKM 54 in 2014 and used it for the kinetic analysis of H 2 S removal over mesoporous LaFeO 3 /MCM-41 sorbent during hot coal gas desulfurization in a fixed-bed reactor. In 2017 55 , the validity of DKM was verified through kinetic analysis for other experimental data.…”

Section: A New Adsorption Rate Equation and The Calculation Methodsmentioning

confidence: 99%

A New Adsorption Rate Equation in Batch Systems

Hong¹,

Sin²,

Pak³

et al. 2018

Preprint

View full text Add to dashboard Cite

In this paper, the deficiencies and cause of previous adsorption kinetic models were revealed, ne w adsorption rate equation has been proposed and its validities were verified by kinetic analysis of various experimental data. This work is a new vie w on the adsorption kinetics rather than a comment on the previous adsorption papers.Many adsorption kinetic models had been proposed and used during about 120 years. The frequently used and recently established 28 models 1-31 were listed in Table S1. The development of adsorption kinetic model has been conducted to obtain the specific models that agree better with the experimental data, as the result, dozens of kinetic models were established. The most of them were based on the Lagergren model 1 (in 1898) and Langmuir kinetic model 24 (in 1918), there were no innovative development. The Deficiencies and Cause of Previous Adsorption Kinetic ModelsCan those be used for the calculation of activation e nergy? One of the important objectives of kinetic study is to evaluate activation energy. Activation energy is the energy which must be available to a chemical system with potential reactants to result in a reaction. Activation energy is obtained by Arrhenius equation and the rate constants of different temperature.Activation energy can't be evaluated by the many of previous adsorption kinetic models, such as the pseudo-order models [1][2][3][4][12][13][14][15] and its changed types [5][6][7][8][20][21][22][23] . These models involve the adsorption amount q e (No. 1-9 and No. 13-21 in Table S1). When Arrhenius equation is used to calculate activation energy, the rate constants must be a constant at given temperature. However, not only the

show abstract

“…The desulfurization kinetics of hot coal gas (H 2 S 0.25%, H 2 10.6%, CO 18%, and carrier gas N 2 ) is described by an improved deactivation kinetic model based on the use of the chemical stoichiometric Equation 3by the authors of [12]:…”

Section: Introductionmentioning

confidence: 99%

Kinetic Features of the Hydrogen Sulfide Sorption on the Ferro-Manganese Material

Cheremisina¹,

Черемисина

Ponomareva

et al. 2021

Metals

View full text Add to dashboard Cite

The kinetics of hydrogen sulfide sorption by the surface of a ferromanganese material containing in its composition a mixture of iron (II) and (III) oxides FeO × Fe2O3, takanelite (Mn, Ca) Mn4O9 × 3H2O and quartz SiO2, and which is samples of unrefined ferromanganese ore, was studied in this work. Sorption rate constant and activation energy constant values were calculated. The catalytic effect of iron (III) oxide was established, the presence of which in natural material contributes to a decrease in the H2S sorption activation energy. Based on the results of X-ray phase and chromatographic analysis methods, a chemical (redox) reaction of the conversion of hydrogen sulfide into elemental sulfur and H2O was revealed. The overall process rate is expressed in terms of the physical sorption stage and chemical transformation of the components; the influence of the rate of the third stage—reaction products desorption—on the overall rate of the process is taken into account. The limiting stage of the process is determined—a chemical reaction. The relation between the heat and the activation energy of the chemical transformation is used according to the Bronsted—Polanyi rule for catalytic processes. It was found that with an increase in the chemisorption heat, the activation energy of the chemisorption stage decreases and, as a consequence, its rate increases. The sorption process parameters were calculated—the Fe2O3 coverage degree with the initial substances and reaction products providing the maximum sorption rate, which can be a criterion for evaluating the catalytically active sites of the catalyst surface for carrying out catalytic reactions.

show abstract

Deactivation Kinetics Model of H₂S Removal over Mesoporous LaFeO₃/MCM-41 Sorbent during Hot Coal Gas Desulfurization

Cited by 26 publications

References 38 publications

Removal of Hydrogen Sulfide with Metal Oxides in Packed Bed Reactors—A Review from a Modeling Perspective with Practical Implications

Removal of Hydrogen Sulfide with Metal Oxides in Packed Bed Reactors—A Review from a Modeling Perspective with Practical Implications

A New Adsorption Rate Equation in Batch Systems

Kinetic Features of the Hydrogen Sulfide Sorption on the Ferro-Manganese Material

Contact Info

Product

Resources

About

Deactivation Kinetics Model of H2S Removal over Mesoporous LaFeO3/MCM-41 Sorbent during Hot Coal Gas Desulfurization

Cited by 26 publications

References 38 publications

Removal of Hydrogen Sulfide with Metal Oxides in Packed Bed Reactors—A Review from a Modeling Perspective with Practical Implications

Removal of Hydrogen Sulfide with Metal Oxides in Packed Bed Reactors—A Review from a Modeling Perspective with Practical Implications

A New Adsorption Rate Equation in Batch Systems

Kinetic Features of the Hydrogen Sulfide Sorption on the Ferro-Manganese Material

Contact Info

Product

Resources

About

Deactivation Kinetics Model of H₂S Removal over Mesoporous LaFeO₃/MCM-41 Sorbent during Hot Coal Gas Desulfurization