One-dimensional model of heat-recovery, non-recovery coke ovens. Part I: General description and hydraulic network sub-model

Buczyński, Rafał; Weber, Roman; Kim, Ronald; Schwöppe, Patrick

doi:10.1016/j.fuel.2016.01.085

Cited by 18 publications

(4 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results show that the fissure development significantly increases the effective thermal conductivity of the coke, and the author proves that Merrick's model [32] assumed his calculations were fissure-free, indicating lower thermal conductivity values. Merrick's effective thermal conductivity minimizes the error during the variation with the temperature and has been validated against the experimental data, showing satisfactory agreement [33]. The thermal conductivity of a solid is a function of the particle density and temperature [32,34] and the contribution of radiation was proportional to the power of 3 for temperature.…”

Section: Introductionmentioning

confidence: 87%

Assessment of the mathematical modelling of thermophysical properties during the pyrolysis of coking coals

Kumaresh,

Kim

2023

Preprint

View full text Add to dashboard Cite

In order to understand the coking process and the behavior of the coal, the coal carbonization was examined by a system of parallel first-order reactions, such that the kinetics of volatile gas release was described by the Arrhenius relationship following Merrick’s work. The specific heat of coal had been analysed based on Einstein quantum theory and temperature dependent fits to determine the variation with temperature during the thermal decomposition of coal. The endothermic reactions reported were directly responsible for the influence of high specific heat, and the main secondary volatile species, methane, rising at high temperature proves the significance of an exothermic reaction. The effect of porosity due to lump coke and fissures establishes the characteristics of the semi-coke porous structure, and an increase in total porosity increases the true density of the coke material. The parametric analyses for the coal ranks facilitate the investigation of thermal conductivity and density as a function of temperature. Finally, the thermal conductivity of solid coal and coke was explained based on the correlation between particulate and coke charge in terms of temperature and porosity, and thereby the abrupt increase in conductivity was found to be caused by the radiative contribution after the resolidification of coal.

show abstract

Section: Introductionmentioning

confidence: 87%

Assessment of the mathematical modelling of thermophysical properties during the pyrolysis of coking coals

Kumaresh,

Kim

2023

Preprint

View full text Add to dashboard Cite

show abstract

“…To solve this issue, a new heat recovery coke oven (HRCO) has been proposed recently. Compared with a traditional coke oven, an HRCO replaces the traditional coke oven's battery (dozens of carbonization chambers connected with combustion chambers interactively) with a large-volume carbonization chamber and combustion chamber [7][8][9][10]. In addition, the operating condition is adjusted to a negative pressure so that low emissions and low pollution can be realized [11].…”

Section: Introductionmentioning

confidence: 99%

Simulation of the Service Environment and Selection of the Refractory Lining for a Heat Recovery Coke Oven

Zhou,

Zhang,

Wang

et al. 2024

Materials

View full text Add to dashboard Cite

A heat recovery coke oven (HRCO) is one of important approaches to achieving a carbon peak and carbon neutrality in China. However, the steady operation of an HRCO is significantly influenced by the internal working conditions and the quality of lining refractories. In this work, a comprehensive study of the internal working conditions of an HRCO was carried out. The results suggest that the partition wall (PW) between the carbonization and combustion chambers is the most vulnerable area, with the corresponding traditional silica bricks inadequate for the service requirements. A reference based on a comparison of the average thermal stress and high-temperature compressive strength is offered for evaluating and selecting silica bricks for the PW. New optimized silica bricks within the reference are verified to be more applicable to the actual working conditions of an HRCO than the traditional silica bricks. As such, this work provides valuable guidance for the optimization and selection of silica bricks for the PW in an HRCO.

show abstract

“…He assumed a few basic criteria for a model, which incorporates several chemical components present in a gaseous product of pyrolysis and provided a means of performing mass and energy balancing. This model has been of great value to the modeling process, and the approach was even effectively applied by Buczynski et al [10,11] to a non-recovery coke oven. Other balancing models developed over the ensuing decades have almost entirely focused on a few selected aspects of the thermal decomposition mechanisms of coal, and thus, they are not applicable for complex process analyses.…”

Section: Introductionmentioning

confidence: 99%

A Predictive Model for Coal Coking Based on Product Yield and Energy Balance

et al. 2020

View full text Add to dashboard Cite

A series of experimental coal pyrolysis studies were conducted to define the parameters of a kinetic model to enable complete mass and energy balances by identifying basic process products. The developed model determines the chemical enthalpy of pyrolytic reactions, making it possible to determine the share of exothermic conversions in the coking process. To validate the model, a series of experimental pyrolysis tests of coking coals used in the coke plant and their blends were conducted, including TGA, retort, and industrial coke oven scale. Despite significant differences in the chemical composition of various coal types, element balancing allowed detection of the difference in product composition and the heat effects of the chemical conversion of such a complex substance as coal. Analysis of the heat effects of pyrolytic coal decomposition indicates substantial variability. In the first coking period, there are endothermic reactions; in the second, exothermic reactions occur. Average heat effect of the pyrolytic reaction for whole coking period is exothermic and, depending on the coal type, ranges from −5 to −50 kJ/kg. The model herein can be used to analyze many other pyrolytic processes because it also takes into account the heating rate.

show abstract

One-dimensional model of heat-recovery, non-recovery coke ovens. Part I: General description and hydraulic network sub-model

Cited by 18 publications

References 16 publications

Assessment of the mathematical modelling of thermophysical properties during the pyrolysis of coking coals

Assessment of the mathematical modelling of thermophysical properties during the pyrolysis of coking coals

Simulation of the Service Environment and Selection of the Refractory Lining for a Heat Recovery Coke Oven

A Predictive Model for Coal Coking Based on Product Yield and Energy Balance

Contact Info

Product

Resources

About