Decarbonisation Technology – August 2021

it has the potential to achieve negative carbon intensity H 2 product while sequestering 1.65 million t/y of CO 2. The project is expected to be one of the largest carbon sequestration initiatives in the US to date. Figure 1 shows the overall flow scheme. CO 2 capture system Wabash evaluated a number of technologies for the CO 2 capture process, including conventional physical and chemical solvents, as well as

UOP CO recovery system

Recycle compressor

Polybed PSA unit

Ortloff CO 2 fractionation process

MOLSIV dehydration unit

Feed gas

Water gas shift

Refrigeration

generic and licensed solvent-based processes, before choosing the configuration offered by Honeywell UOP. The dehydration, CO 2 capture and H 2 purification units are integrated into one overall system to minimise capital and operating expenses. The process equipment can be constructed as modular prefabricated units, which shortens project schedules, lowers construction costs, and improves quality and HSE performance. Higher levels of shop fabrication minimise constructability risks and allow site activities to run in parallel with module fabrication. The modular approach provides Wabash with the capability to maximise its overall project integration from restarting an existing facility while integrating new state-of-the-art carbon capture technology. Advantages Some of the key advantages of the Honeywell UOP CO 2 capture system compared to conventional solvent systems for this plant are shown below: • Lower Capex • Lower Opex • No steam integration needed with existing plant, thereby maximising electricity generation • Dry system (no solvent storage, handling, and so on) • Main consumables are adsorbents, and typical replacement life is >10 years, thereby requiring less planned downtime • Commercially proven technologies • Efficiency: single supplier for technology and equipment allows for less handoff • Bankability: well recognised in the market for both technology licensing and modular equipment

• Faster modular execution • Parallel on-site and module fabrication execution • High-quality shop-fabricated equipment Conclusion Wabash Valley Resources’ bold revisioning of an idle asset into a new carbon-neutral power and H 2 production facility will help provide jobs in the local economy, supply clean, cost-effective power and produce clean hydrogen for transportation offtake in the Midwest. At a time when we clearly need a new direction in power and transportation, when we need to make a real impact on our climate initiatives and when local economies are struggling for job growth, this project will help create that new future. It sets a new direction and the right focus for future growth in these key markets. MOLSIV, Orloff, and Polybed PSA are trademarks of Honeywell UOP. References 1 https://climate.nasa.gov/vital-signs/carbon- dioxide/ 2 https://climate.nasa.gov/vital-signs/sea-level/ 3 www.iea.org/reports/hydrogen

Bhargav Sharma Honeywell UOP

Mark Schott Honeywell UOP

Dan Williams Wabash Valley Resources