Earlier this month the on-line trade journal gasworld published an interview with CSIRO's Ani Kulkarni that illuminated a research program focused on solid oxide electrolysis technology. The takeaway is that the CSIRO program is making progress that can, in Kulkarni’s words, “elevate this technology from the lab bench to become cost-effective at an industrial scale.”
Most hydrogen today is produced from fossil fuels – steam methane reforming of natural gas, partial oxidation of coal or oil residues – and entails large CO2 emissions. This fossil hydrogen can be called “grey hydrogen”. Or sometimes, brown. The same color scheme applies to the ammonia produced from it, so we have “grey ammonia.” Or brown ammonia, your call. The exact carbon footprint depends on the fuel used and the efficiency of the facility, so you could easily identify many shades of grey. There is, however, another option to deliver clean hydrogen – and now another colour: turquoise, or green-blue (or blue-green). This is the colour of hydrogen from methane pyrolysis, a process that directly splits methane into hydrogen and solid carbon. Instead of being a waste, like CO2, that must be disposed of safely, solid carbon is potentially a resource.
This week, ARENA announced funding for the Geraldton Export-Scale Renewable Investment (GERI) Feasibility Study, led by BP Australia. While this project begins small, with a pilot-scale 20,000 ton per year green ammonia plant selling into domestic markets, it could lead to a 1,000,000 ton per year (1.5 GW capacity), export-oriented green ammonia plant.
In March 2020, IHI Corporation, JERA Co., and Marubeni Corporation announced a feasibility study "to evaluate possible applications for the co-firing of ammonia in thermal power plants." The Japanese companies have contracted with NEDO to deliver detailed technical and economic analysis on the use of ammonia as a direct fuel for power generation. In addition, with support from Woodside Energy in Australia, they "will examine the construction and operation of world-scale ammonia facilities and the optimisation of supply chain costs" to support "large-scale export of hydrogen as ammonia."
Last month the Commonwealth Bank of Australia (CBA) announced that it has “signed an AUD $400 million [USD $256 million] three-year bilateral sustainability-linked loan” with Australian conglomerate Wesfarmers. This represents at least the second occasion on which an ammonia producer has linked its cost of capital to progress in meeting sustainability goals. In July 2019, Yara announced that it had signed a USD $1.1 billion revolving credit facility with a group of 13 lenders whose margin “will be adjusted based on Yara’s progress to meet its carbon intensity target by 2025.”
IN BRIEF: According to industry data reported by Rystad Energy in April 2020, ammonia producers are developing the majority of renewable hydrogen projects in Australia. The project pipeline counts more than 400 MW of electrolyzer installations planned for green ammonia production, from a nationwide total of 700 MW.
In recent weeks, governments in Australia and New Zealand have announced major financial awards to accelerate development of local green ammonia plants. In Australia, ARENA awarded AU $995,000 (US $0.6 million) to Yara and ENGIE for their solar ammonia pilot at Yara Pilbara. In New Zealand, the Provincial Growth Fund gave NZ $19.9 million (US $11.3 million) to Ballance-Agri Nutrients and Hiringa Energy for their wind-fed ammonia plant at Kapuni. Both projects will demonstrate that an existing fossil ammonia plant can be decarbonized in increments. Renewable hydrogen can be introduced in small amounts, displacing only a fraction of the plant's natural gas consumption but demonstrating and de-risking the technologies. Then, the renewable energy farms and electrolyzers can be scaled-up in stages, eventually replacing all the natural gas requirements and completing the conversion of a fossil asset to a renewable asset.
The state of South Australia earlier this month issued a tender for professional services under the title “Hydrogen Export Study, Modelling Tool and Prospectus.” The tender is a further step in the state’s campaign to become a major exporter of renewable energy in the form of green and/or blue hydrogen. The results of the study are expected to “inform key considerations such as locations for hydrogen production and export, volume of supply potential, the interdependencies of hydrogen supply chain infrastructure, and the landed cost of clean hydrogen exported from South Australia.”
According to a statement released by the Queensland government last week, the clean infrastructure development firm Hydrogen Utility (H2U) has purchased a 171-hectare site in Gladstone, Queensland, where it intends to build a green ammonia export plant with initial operations beginning in 2025. This "H2-Hub" will be built in stages, scaling up over time to reach up to 3 GW electrolyzer capacity for green hydrogen production, and up to 5,000 tons per day of green ammonia. This is at least twice the size of a conventional natural gas-based world-scale ammonia plant.