In-situ catalytic reforming of converter gas in converter flue based on thermochemical energy storage: Kinetics and numerical simulation

Ren, Binglang; Wang, Guang; Zuo, Haibin; Xue, Qingguo; She, Xuefeng; Wang, Jingsong

doi:10.1016/j.est.2021.103693

Cited by 8 publications

(4 citation statements)

References 34 publications

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“…As a low calorific gas, it features a relatively slow combustion rate. This observation was additionally confirmed by others [ 5 , 6 , 7 ]. Hence, the main target and the essence of this article is to perform an analysis of applying BOFG as a fuel for a tunnel furnace that heats up steel sheets either for a hot rolling mill, steel hardening, or both.…”

Section: Introductionsupporting

confidence: 84%

Usage of Converter Gas as a Substitute Fuel for a Tunnel Furnace in Steelworks

Musiał

Szwaja

Kurtyka³

et al. 2022

Materials

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Converter gas (BOFG) is a by-product of the steel manufacturing process in steelworks. Its usage as a substitute fuel instead of natural gas for fueling a metallurgical furnace seems to be reasonable due to potential benefits as follows: CO2 emission reduction into the ambient air and savings in purchasing costs of natural gas. Results of theoretical analysis focused on implementing converter gas as a fuel for feeding a tunnel furnace for either steel plate rolling, steel sheet hardening in its real working condition or both, are discussed. The analysis was focused on the combustion chemistry of the converter gas and its potential ecological and economic benefits obtained from converter gas usage to heat up steel in a tunnel furnace. Simulations of combustion were conducted using a skeletal chemical kinetic mechanism by Konnov. The directed relation graph with error propagation aided sensitivity analysis (DRGEPSA) method was used to obtain this skeletal kinetic mechanism. Finally, the model was validated on a real tunnel furnace fueled by natural gas. Regarding exhaust emissions, it was found that nitric oxide (NO) dropped down from 275 to 80 ppm when natural gas was replaced by converter gas. However, carbon dioxide emissions increased more than three times in this case, but there is no possibility of eliminating carbon dioxide from steel manufacturing processes at all. Economic analysis showed savings of 44% in fuel purchase costs when natural gas was replaced by converter gas. Summing up, the potential benefits resulting from substituting natural gas with converter gas led to the conclusion that converter gas is strongly recommended as fuel for a tunnel furnace in the steel manufacturing process. Practical application requires testing gas burners in terms of their efficiency, which should provide the same amount of energy supplied to the furnace when fed with converter gas.

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Section: Introductionsupporting

confidence: 84%

Usage of Converter Gas as a Substitute Fuel for a Tunnel Furnace in Steelworks

Musiał

Szwaja

Kurtyka³

et al. 2022

Materials

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“…Therefore, Fe 3 O 4 , FeO, Fe, and CaO were selected to study the DRM reaction. In previous kinetic studies, we have recognized that the DRM reaction can be divided into two steps: [ 47 ] the first step is the decomposition of CH 4 ; the second step is the reaction of C produced by CH 4 decomposition with CO 2 . Therefore, this characteristic is also followed in the experiment of studying the influence of the main components of converter dust on DRM.…”

Section: Methodsmentioning

confidence: 99%

“…In previous studies, we have confirmed the feasibility of injecting COG into the converter flue for in situ online reforming from thermodynamic and kinetic experiments but did not conduct indepth research on the catalytic effect of converter dust on the reforming process. [3,46,47] Therefore, in this article, we studied the influence of converter dust on the reforming process of by-product gas and the influence of main substances in converter dust on DRM reaction, aiming to understand the catalytic effect of dust on LDG þ COG reforming process more comprehensively and deeply. Finally, the optimal range of thermochemical energy storage is obtained by thermodynamic calculation, and the energy storage of LDG reforming in tonne steel is calculated with relevant experimental data.…”

Section: Introductionmentioning

confidence: 99%

Study on the Catalytic Effect of Converter Dust on In Situ Online Reforming of Metallurgical By‐Product Gas and Thermochemical Energy Storage Analysis

Sui,

Ren,

Wang

et al. 2024

Energy Tech

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In situ online reforming of converter gas and coke oven gas is realized by injecting coke oven gas into converter flue. This process utilizes methane dry reforming reaction to achieve heat energy recovery and CO2 capture and utilization. Moreover, the converter flue provides an excellent thermodynamic, kinetic, and catalytic environment. Experiments show that converter dust greatly improves the conversion rate of CH4 and CO2, and increases with the increase of the addition of converter dust. The conversion of CH4 reaches above 80% at 1150 °C, which is about 40% higher than that without catalyst. The CO2 conversion is more than 85% at 1150 °C, while it is only about 50% without catalysis. In addition, through the study of the main components of converter dust, the order of promoting CH4 decomposition is: Fe > Fe3O4≈CaO > FeO; the order of promoting effect on C–CO2 reaction is: Fe3O4 > CaO > FeO > Fe. Finally, the reforming energy storage is calculated by thermodynamic calculation and experimental data. The reforming energy storage of tonne crude steel is about 159.589 MJ, accounting for 44.5% of the total physical heat energy of converter flue gas, and CO2 emission reduction in converter flue gas is more than 50%.

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“…With high energy consumption and carbon emission, there is significant room for improvement in the energy efficiency of the industrial sector, a large amount of waste heat is dissipated into the environment due to inefficient use each year (Zhou et al, 2019;Li, 2020). Taking the steel industry as an example, the exhaust gas emitted from converters contains approximately 2.45 × 10 11 MJ of heat annually, with a recovery rate of less than 35% (Ren et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

A novel optimization method of carbon reduction strategies implementation for industrial parks

Zhao,

Zhang,

Chen

et al. 2024

Front. Energy Res.

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The effects of various energy conservation and carbon reduction (ECCR) strategies can differ significantly despite equal investment. Given limited amount of capital expenditure, managers and planners of industrial parks must carefully select from different ECCR strategies and implementation technologies to maximize investment returns. This study establishes mathematical models for four ECCR strategies: forestry carbon sequestration (FCS), carbon capture and utilization (CCU), waste heat recovery (WHR), and photovoltaic (PV). A universal ECCR planning optimization model is constructed to maximize annual economic benefits or carbon emission reduction. Using an industrial park in southern China as a case study, genetic algorithms are utilized to solve the model and validate its feasibility. The study analyzes three key parameters: capital expenditure caps, carbon trading price in the Emission Trading Scheme, and transportation distance of captured CO2 products for sensitivity. The results demonstrate considerable economic benefits of the CCU strategy when demand matches appropriately. However, in cases with limited capital expenditure, implementing small-scale FCS strategies in industrial parks is not advisable from both an economic and environmental perspective.

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In-situ catalytic reforming of converter gas in converter flue based on thermochemical energy storage: Kinetics and numerical simulation

Cited by 8 publications

References 34 publications

Usage of Converter Gas as a Substitute Fuel for a Tunnel Furnace in Steelworks

Usage of Converter Gas as a Substitute Fuel for a Tunnel Furnace in Steelworks

Study on the Catalytic Effect of Converter Dust on In Situ Online Reforming of Metallurgical By‐Product Gas and Thermochemical Energy Storage Analysis

A novel optimization method of carbon reduction strategies implementation for industrial parks

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