CO2 capture in integrated steelworks by commercial-ready technologies and SEWGS process

Gazzani, Matteo; Romano, Matteo Carmelo; Manzolini, Giampaolo

doi:10.1016/j.ijggc.2015.07.012

Cited by 54 publications

(20 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Applying amine absorption to the BFG alone could reduce emissions by 19%-39% (Kuramochi et al, 2012;Ho et al, 2013;Biermann et al, 2019). Other technologies undergoing development include the sorption-enhanced Water-Gas Shift technology (Gazzani et al, 2015;ECN, 2019) with a TRL of 3-6 (Gazzani et al, 2015;Axelson et al, 2018), and Top-Gas-Recycling Blast Furnace (Meijer et al, 2009;Birat, 2020), which involves the recirculation of the BFG as a reducing gas. The choice of BFG over flue gases as the source of CO 2 for partial capture is advantageous in the techno-economic sense due to the higher CO 2 partial pressures (Sundqvist et al, 2018;Biermann et al, 2019) and the absence of oxygen (Dreillard et al, 2017) in the BFG.…”

Section: Co 2 Capture From Steel Mill Gasesmentioning

confidence: 99%

Carbon Allocation in Multi-Product Steel Mills That Co‐process Biogenic and Fossil Feedstocks and Adopt Carbon Capture Utilization and Storage Technologies

et al. 2020

View full text Add to dashboard Cite

This work investigates the effects of carbon allocation on the emission intensities of low-carbon products cogenerated in facilities that co‐process biogenic and fossil feedstocks and apply the carbon capture utilization and storage technology. Thus, these plants simultaneously sequester CO2 and synthesize fuels or chemicals. We consider an integrated steel mill that injects biomass into the blast furnace, captures CO2 for storage, and ferments CO into ethanol from the blast furnace gas. We examine two schemes to allocate the CO2 emissions avoided [due to the renewable feedstock share (biomass) and CO2 capture and storage (CCS)] to the products of steel, ethanol, and electricity (generated through the combustion of steel mill waste gases): 1) allocation by (carbon) mass, which represents actual carbon flows, and 2) a free-choice attribution that maximizes the renewable content allocated to electricity and ethanol. With respect to the chosen assumptions on process performance and heat integration, we find that allocation by mass favors steel and is unlikely to yield an ethanol product that fulfills the Renewable Energy Directive (RED) biofuel criterion (65% emission reduction relative to a fossil comparator), even when using renewable electricity and applying CCS to the blast furnace gas prior to CO conversion into ethanol and electricity. In contrast, attribution fulfills the criterion and yields bioethanol for electricity grid intensities <180 gCO2/kWhel without CCS and yields bioethanol for grid intensities up to 800 gCO2/kWhel with CCS. The overall emissions savings are up to 27 and 47% in the near-term and long-term future, respectively. The choice of the allocation scheme greatly affects the emissions intensities of cogenerated products. Thus, the set of valid allocation schemes determines the extent of flexibility that manufacturers have in producing low-carbon products, which is relevant for industries whose product target sectors that value emissions differently. We recommend that policymakers consider the emerging relevance of co‐processing in nonrefining facilities. Provided there is no double-accounting of emissions, policies should contain a reasonable degree of freedom in the allocation of emissions savings to low-carbon products, so as to promote the sale of these savings, thereby making investments in mitigation technologies more attractive to stakeholders.

show abstract

Section: Co 2 Capture From Steel Mill Gasesmentioning

confidence: 99%

Carbon Allocation in Multi-Product Steel Mills That Co‐process Biogenic and Fossil Feedstocks and Adopt Carbon Capture Utilization and Storage Technologies

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The FReSMe concept takes advantage of the Sorption Enhanced Water Gas Shift (SEWGS) [5] technology for converting the CO with steam into CO2 and H2 and simultaneously separating the CO2 from the hydrogen in the steel off-gases.…”

Section: Fresme Projectmentioning

confidence: 99%

“…The FReSMe plant accounts for the reaction of the CO2 and H2 separated from the BFG, by means of SEWGS technology [5], additional H2 is obtained by the adoption of an electrolyzer. SEWGS, which stands for Sorption Enhanced Water Gas Shift reactor, works at high pressure (20÷30 bar) and combines the shift reaction with the CO2 adsorption.…”

Section: Methanol Production With Sewgs Gasesmentioning

confidence: 99%

From Residual Steel Gases to Methanol: The Fresme Project

et al. 2019

Self Cite

View full text Add to dashboard Cite

With several carbon capture and storage (CCS) pilot and demonstration units deployed worldwide, the complementary approach of carbon dioxide use to increase the unitization of fossil carbon is being suggested. Conversion of CO2 can lead to useful product. Methanol is a high volume platform chemical of universal use in chemical industry as well as applicable for fueling internal combustion engines. FReSMe project will demonstrate the production of Methanol (MeOH) using as feedstock CO2 from Blast Furnace Gas (BFG). This paper presents the process modelling of the FReSMe concept and compares it with a standard methanol synthesis plant with Natural Gas as feedstock. The production of methanol based on the concept proposed in the FReSMe project requires higher energy, but lead to a reduction of about 1036 kgCO2/tMeOH.

show abstract

“…By means of a sorption enhanced water-gas-shift (SEWGS) process, the BFG is converted into a H 2 -enriched gas (>30%vol H 2 ), whereas the CO 2 generated in the reactor is removed in situ due to the presence of a high-temperature sorbent (typically a hydrotalcite-based solid that is also water-gas-shift catalyst at temperatures between 300 and500 • C) (Ji et al, 2018). The demonstration of this technology up to TRL6-7 has been carried out during the consecutive EU programmes CACHET, CAESAR, and STEPWISE (van Selow et al, 2009;Boon et al, 2015;Gazzani et al, 2015). It has been observed that the main challenge for the scaling-up of the SEWGS process is the high cost for the sorbent regeneration and the low inherent CO 2 sorption capacity of the sorbent (best carrying capacities of promoted hydrotalcites have been measured at up to 8 wt.%).…”

Section: Introductionmentioning

confidence: 99%

Advanced Packed-Bed Ca-Cu Looping Process for the CO2 Capture From Steel Mill Off-Gases

2020

View full text Add to dashboard Cite

A novel configuration of the Ca-Cu looping process based on dynamically operated packed-bed reactors is proposed to convert blast furnace gas (BFG) into H 2 /N 2 and highly concentrated CO 2 , accompanied by a large amount of high-temperature heat. Preliminary energy and mass balances of the process reveal that around 30% of the BFG can be upgraded via calcium assisted water gas shift (WGS) if only BFG is used as reducing gas in the reduction/calcination stage. A higher amount of H 2 /N 2 can be produced by using other steel mill off gases, such as coke oven gas (COG) or basic oxygen furnace gas (BOFG), or natural gas in the regeneration of the CO 2 sorbent. This decarbonized fuel gas could be used for onsite power generation or to obtain sponge iron by a Direct Reduced Iron (DRI) process, increasing the overall capacity of the steel plant. Energy efficiencies higher than 75% have been calculated, reaching maximum values around 88% in case of using natural as fuel gas for the sorbent regeneration stage. Low values for the specific energy consumption of around 1.5 MJ LHV /kg CO2 and CO 2 capture efficiencies higher than 95% support the further development of the proposed Ca-Cu looping process.

show abstract

CO2 capture in integrated steelworks by commercial-ready technologies and SEWGS process

Cited by 54 publications

References 31 publications

Carbon Allocation in Multi-Product Steel Mills That Co‐process Biogenic and Fossil Feedstocks and Adopt Carbon Capture Utilization and Storage Technologies

Carbon Allocation in Multi-Product Steel Mills That Co‐process Biogenic and Fossil Feedstocks and Adopt Carbon Capture Utilization and Storage Technologies

From Residual Steel Gases to Methanol: The Fresme Project

Advanced Packed-Bed Ca-Cu Looping Process for the CO2 Capture From Steel Mill Off-Gases

Contact Info

Product

Resources

About