8 Rivers in Texas: deploying 8RH2 technology for carbon capture beyond 99%

 

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8 Rivers has developed its proprietary 8RH2 technology, which allows for CO₂ “capture” in excess of 99% from gas-based ammonia production. The technology is based on the Allam-Fetvedt Cycle, an oxyfuel combustion process, which produces highly purified CO₂ at 150 bar. This CO₂ feed is continuously recycled and utilized throughout the overall process, with only a small fraction escaping as fugitive emissions.

Recently, 8 Rivers announced a new project based on 8RH2, which will produce 880,000 metric tons of “ultra low carbon” ammonia each year in Port Arthur, Texas. Cormorant Clean Energy is expected to start production in 2027, with exports likely headed to Asian nations such as South Korea and Japan.

Existing gas-based ammonia plants are typically able to capture about two-thirds of overall CO₂ emissions, which is often used in urea production. CCS can then be applied on top of this to increase emissions capture. Theoretically, between 95-97% of the CO₂ can be captured. Although significant, this still means that residual CO₂ emissions are associated with the produced ammonia.

To discuss the technology, Cormorant Clean Energy and other opportunities, Steve Milward (Chief Operating Officer, 8 Rivers) & Maulik Shelat (VP Product Development – 8RH2, 8 Rivers) were joined in conversation by AEA Technology Manager Kevin Rouwenhorst.