The reactivity of cokes in Boudouard–Bell reactions in the context of an Ergun model

Mianowski, A.; Radko, Tomasz; Siudyga, Tomasz

doi:10.1007/s10973-015-4761-3

Cited by 5 publications

(6 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This article is the continuation of discussion on the coke reactivity presented in our previous paper [10]. …”

Section: Introductionmentioning

confidence: 54%

“…where on the basis of works [10,11], the function f(x) frequently corresponds to nth-order kinetics. In the general form, where n ¼ 0; 1 = 2 ; 2 = 3 or 1:…”

Section: Kinetic Models For Solid-phase Conversion With the Mass Balancementioning

confidence: 99%

“…The approach of many authors in this area is too complex for a short discussion. Mianowski et al [7,10] introduced a concept based on the established mechanisms (2) and (3), taking into account the separation of a reversible chemical reaction from the desorption process in accordance with the following equation:…”

Section: Kinetic Models For Solid-phase Conversion With the Mass Balancementioning

confidence: 99%

See 2 more Smart Citations

Influence of initial assumptions on the kinetic models of CO2 gasification of chars and cokes in solid phase

Mianowski

Radko

Siudyga

2016

J Therm Anal Calorim

Self Cite

View full text Add to dashboard Cite

Kinetic studies of CO 2 gasification of different materials were carried out using the Geneva method in an apparatus for determining the reactivity of cokes. The main purpose of these studies was parallel analysis of the Boudouard-Bell (B-B) reaction progress on the basis of both solid-phase and gaseous products combined with the mass balance of the process. The kinetic equations involve the conversion degree of the solid (x) or gaseous phase (a) with the kinetic reaction rate constant. It was proved that the mathematical form of the mass balance is similar to the simplest kinetic equation, in which the kinetic constant k is replaced by the known process constant C. Complete kinetic description of the B-B reaction is determined by adopting initial conditions and taking into account the chemical reaction that occurs in a short time interval.

show abstract

“…This article is the continuation of discussion on the coke reactivity presented in our previous paper [10]. …”

Section: Introductionmentioning

confidence: 54%

“…where on the basis of works [10,11], the function f(x) frequently corresponds to nth-order kinetics. In the general form, where n ¼ 0; 1 = 2 ; 2 = 3 or 1:…”

Section: Kinetic Models For Solid-phase Conversion With the Mass Balancementioning

confidence: 99%

Section: Kinetic Models For Solid-phase Conversion With the Mass Balancementioning

confidence: 99%

See 1 more Smart Citation

Influence of initial assumptions on the kinetic models of CO2 gasification of chars and cokes in solid phase

Mianowski

Radko

Siudyga

2016

J Therm Anal Calorim

Self Cite

View full text Add to dashboard Cite

show abstract

“…Li 2 O (s/l) + C (s) → 2 Li (g) + CO (g) (6) Said reducing conditions, namely high temperatures, low oxygen partial pressures (pO 2 ), and a high carbon monoxide (CO) to carbon dioxide (CO 2 ) ratio, must be provided by the InduMelt reactor. In this regard, the high temperatures of approximately 1550 • C and the excessive supply of carbon, see the Boudouard reaction in Equation (7), should be sufficient to maintain low pO 2 and high CO/CO 2 values [50].…”

Section: Simultaneous Thermal Analysesmentioning

confidence: 99%

Investigation of Potential Recovery Rates of Nickel, Manganese, Cobalt, and Particularly Lithium from NMC-Type Cathode Materials (LiNixMnyCozO2) by Carbo-Thermal Reduction in an Inductively Heated Carbon Bed Reactor

Windisch-Kern

Holzer

Wiszniewski

et al. 2021

Metals

View full text Add to dashboard Cite

Within the e-mobility sector, which represents a major driver of the development of the overall lithium-ion battery market, batteries with nickel-manganese-cobalt (NMC) cathode chemistries are currently gaining ground. This work is specifically dedicated to this NMC battery type and investigates achievable recovery rates of the valuable materials contained when applying an unconventional, pyrometallurgical reactor concept. For this purpose, the currently most prevalent NMC modifications (5-3-2, 6-2-2, and 8-1-1) with carbon addition were analyzed using thermogravimetric analysis and differential scanning calorimetry, and treated in a lab-scale application of the mentioned reactor principle. It was shown that the reactor concept achieves high recovery rates for nickel, cobalt, and manganese of well above 80%. For lithium, which is usually oxidized and slagged, the transfer coefficient into the slag phase was less than 10% in every experimental trial. Instead, it was possible to remove the vast amount of it via a gas phase, which could potentially open up new paths regarding metal recovery from spent lithium-ion batteries.

show abstract

“…Gasification kinetics is related to chemical reactions between bound and free forms of carbon and oxygen on the reactive surface [6,7], the state of which is determined by many factors. The type of original material is of key importance [8,9].…”

Section: Introductionmentioning

confidence: 99%

Thermogravimetric Study of the Kinetics of the Reaction C + CO2 under Pore-Diffusion Control

Donskoy¹,

Козлов²

2021

Energies

View full text Add to dashboard Cite

This study presents experimental studies of charcoal gasification with CO2 at different heating rates (1, 5, 10, 20, and 50 K min−1). The kinetics of the reaction C + CO2 under pore-diffusion control is studied. We propose a new method for the proper determination of activation energy during the processing of thermogravimetric curves of porous carbon gasification under conditions of pore-diffusion resistance. The results of the inverse kinetic problem solution are compared with different hypotheses about the regime of the investigated heterogeneous reaction process (kinetic, diffusion, pore-diffusion). The change of reaction regimes from kinetic to diffusion is detected during charcoal gasification at different heating rates. At heating rates of 5–20 K min−1, the values of activation energy of carbon gasification reaction in the carbon dioxide atmosphere, obtained by the proposed method, closely match the data found in the previous studies. The use of diffusion models in the processing of thermogravimetric curves determines the conditions under which conventional kinetic models fail to provide adequate information about the temperature dependence of the heterogeneous reaction rate.

show abstract

The reactivity of cokes in Boudouard–Bell reactions in the context of an Ergun model

Cited by 5 publications

References 25 publications

Influence of initial assumptions on the kinetic models of CO2 gasification of chars and cokes in solid phase

Influence of initial assumptions on the kinetic models of CO2 gasification of chars and cokes in solid phase

Investigation of Potential Recovery Rates of Nickel, Manganese, Cobalt, and Particularly Lithium from NMC-Type Cathode Materials (LiNixMnyCozO2) by Carbo-Thermal Reduction in an Inductively Heated Carbon Bed Reactor

Thermogravimetric Study of the Kinetics of the Reaction C + CO2 under Pore-Diffusion Control

Contact Info

Product

Resources

About