Study on the carbon reduction potential of blast furnace injection process using reformed coke oven gas

被引：0

作者：

Chang C. ^{[1
]}

Song H. ^{[1
]}

Lei F. ^{[1
]}

Di Z. ^{[1
]}

Cheng F. ^{[1
]}

机构：

[1] Institute of Resources and Environment Engineering, Shanxi University, Shanxi, Taiyuan

来源：

Huagong Xuebao/CIESC Journal | 2024年 / 75卷 / 06期

关键词：

carbon dioxide; carbon emission reduction; coke oven gas; hydrogen; model;

D O I：

10.11949/0438-1157.20231163

中图分类号：

学科分类号：

摘要：

The iron and steel industry accounts for 14%—18% of the total carbon emissions in China, making it the highest emitting sector in the industrial field. The blast furnace-basic oxygen furnace process contributes to 89% of the total steel production in China. This process is characterized by a long flow path and emits 2 tons of carbon per ton of steel produced. Carbon emission reduction based on the blast furnace-converter process is key to the steel industry’s decarbonization goals. Based on the energy balance model, this study focuses on analyzing the impact of using coke oven gas and reformed coke oven gas for blast furnace injection on process parameters such as direct reduction degree and theoretical coke ratio. It aims to systematically evaluate the potential carbon dioxide emission reduction benefits of this approach. The results indicate that increasing the injection volume and temperature of hydrogen-rich gas effectively reduces coke consumption. However, under the same injection volume conditions, increasing the hydrogen purity leads to a slight increase in coke consumption due to heat compensation. When the coke oven gas is reformed to yield hydrogen gas with a purity of 97.9%, a carbon reduction of 34.62% in the blast furnace can be achieved. Compared to direct injection of coke oven gas, the potential for carbon reduction is increased by 17.76%. The carbon reduction mainly stems from the decrease in coke consumption and the reduced carbon content in the injected gas. Power generation from blast furnace gas is also a crucial step in carbon reduction. When the hydrogen purity of the injected gas is increased from 59% to 97.9%, the carbon reduction potential in this step is improved from 9.04% to 10.85%. The reformation of coke oven gas in the blast furnace injection process has the potential to surpass the upper limit of carbon reduction achievable with hydrogen-rich gas, making it a promising approach with potential for widespread implementation. © 2024 Materials China. All rights reserved.

引用

页码：2344 / 2352

页数：8

共 30 条

[1] China’ s Peak Carbon Dioxide Emissions Research Report Before 2030, (2021)
[2] Shen X N, Li Y X., Cost management of iron and steel enterprises based on the goal of“peak carbon dioxide emissions, carbon neutrality”, Journal of Brand Research, 31, (2020)
[3] Lv P, Zheng P H, Lei G P, Et al., Synergistic control technology of sintering flue gas pollutants, Science and Technology & Innovation, 9, pp. 65-67, (2020)
[4] Ren L, Zhou S, Ou X M., The carbon reduction potential of hydrogen in the low carbon transition of the iron and steel industry: the case of China, Renewable and Sustainable Energy Reviews, 171, (2023)
[5] Tian S C, Jiang J G, Zhang Z T, Et al., Inherent potential of steelmaking to contribute to decarbonisation targets via industrial carbon capture and storage, Nature Communications, 9, (2018)
[6] Xu K D., Low carbon economy and iron and steel industry, Iron & Steel, 45, 3, pp. 1-12, (2010)
[7] Yilmaz C, Wendelstorf J, Turek T., Modeling and simulation of hydrogen injection into a blast furnace to reduce carbon dioxide emissions, Journal of Cleaner Production, 154, pp. 488-501, (2017)
[8] Yilmaz C, Turek T., Modeling and simulation of the use of direct reduced iron in a blast furnace to reduce carbon dioxide emissions, Journal of Cleaner Production, 164, pp. 1519-1530, (2017)
[9] Manzolini G, Giuffrida A, Cobden P D, Et al., Techno-economic assessment of SEWGS technology when applied to integrated steel-plant for CO<sub>2</sub> emission mitigation, International Journal of Greenhouse Gas Control, 94, (2020)
[10] Johnson S, Deng L Y, Gencer E., Environmental and economic evaluation of decarbonization strategies for the Indian steel industry, Energy Conversion and Management, 293, (2023)

← 1 2 3 →