(118b) From Steel to Ethylene: Super Dry Reforming of CO2
AIChE Spring Meeting and Global Congress on Process Safety
2022
2022 Spring Meeting and 18th Global Congress on Process Safety Proceedings
Topical 4: The 34th Ethylene Producers Conference
Ethylene Plant Technology Fundamentals
Tuesday, April 12, 2022 - 2:30pm to 2:55pm
A crucial step to address GHG emissions in steel manufacture is to close the C-cycle by using the emitted CO2 to create a value chain and produce carbon-neutral fuels and chemicals. This approach will amplify the CO2 equivalent reduction compared to capture/storage-only solution (baseline to achieve the carbon footprint reduction). In fact, together with a reduction of GHG direct emissions there is an enhanced CO2 eq. reduction due to substitution of fossil fuels (FF) and by promoting direct use of renewable energy (RE). In addition, this concept will foster symbiosis and circularity with other industrial sectors (use CO2 from other EIIs).
The value chain that will be discussed is as follows:
- conversion of CO2 to CO via the innovative Super Dry Reforming (SDR) technology
- adding innovative elements to the SDR technology: electrification with renewable energy innovative reactor designs and alternative carbon sources (e.g. non-recyclable plastic waste)
- gas fermentation of CO to ethanol
- coupling of the core technologies of SDR and gas fermentation to commercial value chain technologies
The SDR pilot plant is currently under construction and should be able to provide the first results if COVID does not interfere.
Our calculations show that the SDR technology combined with Lanzatech's ethanol production technology will be able to achieve less than 20 g CO2 eq./MJ and be a true game changer in achieving an ethanol production with acceptable climate impacts. Additional innovations to the SDR technology will even lower this impact further. Producing isopropanol rather than ethanol, and extending the value chain to produce, in a flexible way, C2-C3 olefins such as ethylene and propylene (with market sizes > 120 Mton/y and > 300 Bâ¬/y), will further consolidate the economics, and expand market opportunities.
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