Assessing the environmental impact of an integrated steel mill with post-combustion CO2 capture and storage using the LCA methodology

Techno-Economic and Environmental Evaluations of Decarbonized Fossil-Intensive Industrial Processes by Reactive Absorption & Adsorption CO2 Capture Systems

“…All assessed decarbonized steel concepts are not considering any import of heat and power (steel mill off-gases are used for this purpose). In this respect, natural gas was used as additional fuel to cover the ancillary energy consumptions [36]. The decarbonized steel mill concepts capture CO 2 from the most significant plant units, e.g., captive power plant, blast furnace hot stoves, and lime coke production units.…”

“…As shown in Table 5, the decarbonization of main CO 2 emitters (captive heat and power plant, blast furnace, lime and coke production units) from an integrated iron and steel production plant cut the overall carbon footprint significantly (with a reduction of about 60 to 70%). Considering the significant amount of greenhouse gas emission of this important industrial sector, this reduction is very substantial [36]. The investigated looping cycle has some important advantages in comparison to the chemical scrubbing system, e.g., higher energy conversion yield and subsequent lower decarbonization energy and cost penalties, integration of spent calcium-based sorbent in the iron and steel production process with a positive impact on plant environmental performance [37].…”

“…The investigated looping cycle has some important advantages in comparison to the chemical scrubbing system, e.g., higher energy conversion yield and subsequent lower decarbonization energy and cost penalties, integration of spent calcium-based sorbent in the iron and steel production process with a positive impact on plant environmental performance [37]. As for the above-presented cases (combustion and gasification-based power generation), the decarbonization process reduces carbon footprint but increases other environmental indicators [36].…”

Life Cycle Assessment of SEWGS Technology Applied to Integrated Steel Plants

“…The life cycle inventory (LCI) data for various subsystems are presented in the next section. The LCI for some raw materials (e.g., coal extraction and transportation, iron ore extraction and transportation, limestone extraction and transportation) are the ones presented in a previous work [22]. Additional data are shown in Tables 2-5. a -gases to capture unit; b -gases to transport and storage; PP: power plant; COG: coke oven gas; BFG: blast furnace gas; BOFG: blast oxygen furnace gas.…”

“…The scientific literature describes some LCA studies of integrated steel mill as gate-to-gate [19,20] or cradle-to-gate [21] using various system boundaries. Considering the integration of steel mills with carbon capture, a cradle-to-gate LCA for an integrated steel mill without and with carbon capture by both conventional gas-liquid chemical absorption using MEA and a more advanced capture technology based on chemical looping was investigated and discussed in a previous work [22]. The comparison between conventional CO 2 capture technology coupled with steel production and the more innovative SEWGS technique has not yet been investigated from the ecological point of view.…”