Solutions-Steel and Chemicals Co-Production-PKU Pioneer-Steel Chemicals- steel chemical co-production-purify CO-separate CO

Steel and Chemicals Co-Production

Market Demand Solutions-Steel and Chemicals Co-Production-PKU Pioneer-Steel Chemicals- steel chemical co-production-purify CO-separate CO

China's steel production capacity exceeds 1 billion tons per year. And a large amount of blast furnace gas (BFG), converter gas (BOFG) and coke oven gas (COG) is produced as by-products of the iron and steel production process, where CO, H2 and methane are contained. C1 chemistry is a production process that converts and synthesizes chemical products from compounds of one carbon atom (CO, methane, etc.) as raw materials, especially the modern coal-chemical processing, which uses syngases mainly containing CO and H2 as the feedstock. CO and H2 are purified from the steel by-product gases and used directly in the C1 chemistry, which not only increases the utilization value of the steel gases but also reduces the production cost of chemical synthesis. Taking the by-product gases of the iron and steel industry as the source and the chemical products in the chemical industry, such as methanol, ethanol, ethylene glycol, etc. as the terminals, the steel and chemicals co-production breaks through the limitations of different sectors and builds a bridge between steel and the chemical industry. It is one of the effective ways for the steel industry to realize the "dual carbon" goals.

Technological Advantages Solutions-Steel and Chemicals Co-Production-PKU Pioneer-Steel Chemicals- steel chemical co-production-purify CO-separate CO

The key point of the steel and chemicals co-production process is the purification of steel by-product gases. PKU Pioneer's "low-carbon utilization technology of steel mill exhaust gases" can efficiently purify CO from blast furnace gas and converter gas and separate H2 from coke oven gas, by a process with high maturity and stability. It has the following advantages:

CO Recovery from N2-Rich Gases

Separation of CO from N2-rich gases is difficult throughout the world. With the exclusive PU-1 adsorbent and the associated separation process, PKU Pioneer has realized the technological breakthrough of purifying CO from nitrogen-enriched gas mixtures, which has provided key technological support for the development of the steel and chemicals co-production projects.

BFG and BOFG Purification

PKU Pioneer initiated the process blast furnace gas and converter gas purification process in the industry- "compression-desulfurization-deoxygenation-dehydration-carbon capture-CO purification". Having been successfully industrialized, the process will further improve the efficiency of the cogeneration of the steel and chemicals co-production with low energy consumption and advanced technologies.

Benefiting Carbon Capture

With 20-30% CO2 content in the blast furnace and converter gas, decarbonization (carbon capture) is necessary for recovering high-purity CO from BFG and BOFG. Therefore, combining steel and chemical production reduces the cost and energy consumption of carbon capture for the iron and steel industry.

Significant Economic Benefits

Compared with modern coal chemical industry, the steel-chemical co-production replaces coal gasification with steel exhaust gases, which reduces the raw material cost of chemical engineering and avoids the risk arising from coal price fluctuation, making the price of terminal chemical products more competitive.

Outstanding Environmental Benefits

Steel-chemical co-production immobilizes CO originally used for combustion into chemical products, and simultaneously carries out performs purification processes such as dust removal and desulfurization, reducing emissions of carbon, sulfur and nitrogen oxides and other pollutants emitted by iron and steel enterprises to achieve ultra-low emissions and “dual carbon” target.

Significant Social Benefits

As a coordinated solution that surpasses the limitations of a single industry, steel-chemical co-production helps to extend the industrial chain of the steel industry, improve the risk-resistant ability, expand the raw materials for the chemical industry, enhance product competitiveness, and promotes the transformation and upgrading of industry integration.

Application Scenario

In total, PKU Pioneer has currently completed 3 steel-chemical co-production projects for Shiheng Special Steel Asd Technology Co., Ltd., Woneng Chemical of Shanxi Jinnan Iron and Steel Group, and China Ecotek Corp. of Sinosteel Taiwan. The common application scenarios are as follows:

Foundry Blast Furnace Ironmaking Enterprises

Generally, casting blast furnace with useful volumes smaller than 1000m3 is used for iron manufacturing. During the process of melting iron, blast furnace gas is generated as a by-product, from which CO can be purified and used to produce formic acid, acetic acid, dimethyl carbonate, and other chemical products that do not involve the participation of hydrogen in the synthesis.

Steelmaking Enterprises Using Blast Furnace-Converter Long Process Technology

Depending on different production capacities, steel enterprises using the long process adopt blast furnaces with a volume of 1000-6000m3 for ironmaking and 30-350-ton converter for steelmaking, emitting blast furnace gas and converter gas at the same time, where CO can be purified for the production of chemical products with H2 excluded in the synthesis, such as formic acid, acetic acid and dimethyl carbonate, etc.

Steel and Coke Chemical Enterprises Using Blast Furnace + Converter + Coke Oven Technology

On the basis of long-process steelmaking, steel and coking conglomerates equip coke ovens (4.3-7.6m) to manufacture coke for ironmaking in blast furnaces, while coke oven gas is co-produced as a by-product, where H2 can be purified for the production of chemical products requiring H2 when synthesizing with CO separated from BFG and BOFG, such as methanol, ethanol and glycol, etc.

Coking Enterprises

Coking enterprises use coke ovens (4.3-7.6m) to manufacture coke depending on their production capacities. At the same time, coke oven gas is produced as a by-product, which can be used to reform the methane in the COG into syngas containing CO and H2, which can be separated and purified to be utilized for the production of methanol, ethanol, ethylene glycol, and other chemical products involving H2 in the synthesis.

Oxygen-Enriched/Oxyfuel Combustion

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