In our April episode of Project Features, 8 Rivers joined us to discuss its 8RH2 technology for gas-based hydrogen production with carbon capture rates beyond 99%. As well as the technology itself, we explore the Allam-Fetvedt cycle, the deployment of 8RH2 to produce ammonia in Texas, and 8 Rivers’ future plans.
China is keeping pace with IEA predictions for electrolyzer installations, with as much as 55% of the world’s total capacity to be installed there by 2028. Coupled with strong wind-power resources, domestic manufacturing capabilities and multiple economic drivers to transition away from coal-based ammonia production, China is ideally positioned to speed up the deployment of renewable ammonia projects.
In our latest episode of Ammonia Project Features, we explored Project Iracema: a grid-connected, renewable ammonia production facility under-development in Pecem, northeast Brazil. To discuss Brazil’s unique electricity market, project details and the important role of certification to the project, AEA Technology Manager Kevin Rouwenhorst was joined by Jonas Rechreche (Proton Ventures), Matheus Kleming (Casa dos Ventos) and Ricardo Gedra (CCEE).
Decarbonization of existing steam methane reforming-based ammonia plants is possible, and changes in gas and heat flows can be recovered via alternative technologies. Recap our workshop in Atlanta, where we discussed the use of upstream methane monitoring equipment, electrolysers, carbon capture, hydrogen burners, energy storage and electric heating to achieve decarbonization of conventional ammonia plants.
In our September episode of Ammonia Project Features, Pupuk Kaltim and Copenhagen Atomics joined us to explore their new, nuclear-powered ammonia project in Bontang, East Borneo. Cophenagen’s Thorium-fed, Onion Core® reactor design will be integrated with solid oxide electrolysers and an existing ammonia synthesis loop to produce more than one million tonnes per year of low-carbon ammonia.
Anion Exchange Membrane (AEM) electrolysis combines concepts from alkaline and PEM. Although AEM can potentially offer the best of both worlds compared to conventional technology, challenges such as oxygen sensitivity, stack scale-up and current density still need to be addressed. Germany-based Enapter is leading the commercialization of AEM systems, with other electrolyzer manufacturers now developing their own products.
Alkaline electrolyzers will play a significant role in renewable ammonia production going forward. Historical developments in electrocatalysts and optimized stack design have already addressed some of the key bottlenecks in the technology, and new developments will enable flexible operations at higher pressures.
Recent PEM technology developments have centered around two issues: i) the relative scarcity of Iridium, and ii) the membrane thickness, limiting the efficiency of the PEM electrolyzer. This week we explore new approaches to both, including work by precious metal company Heraeus, and Norwegian start-up HyStar.
Our June episode of Ammonia Project Features focused on a new project in Niigata prefecture, which will demonstrate low-carbon, fossil-based ammonia production with a capacity of 500 tonnes per year. As part of the project, Japanese government organization JOGMEC will work with INPEX to develop enhanced gas recovery & CO2 sequestration monitoring technologies. Tsubame BHB will deploy its low-temperature, low-pressure ammonia synthesis technology based on an electride-supported catalyst developed at the Tokyo Institute of Technology.
The cost gap between fossil-based ammonia production and electrolysis-based ammonia production in China is arguably the smallest in the world. In our May episode of Ammonia Project Features, we explored two new, “flexible” renewable ammonia projects being developed in northeast China, as well as some of the engineering challenges as we scale-up electrolysis plants to gigawatt-sized.