Realisation of Large-Scale Green Ammonia Plants
The movement toward small-scale ammonia is accelerating for two reasons. First, small ammonia plants are flexible. And, second, small ammonia plants are flexible. They are feedstock-flexible, meaning that they can use the small quantities of low-value or stranded resources that are widely available at a local scale. This includes flared natural gas, landfill gas, or wind power. And they are market-flexible, meaning that they can serve various local needs, selling products like fertilizer, energy storage, or fuel; or services like resource independence, price stability, or supply chain robustness. While the scale of these plants is small, the impact of this technology is big. As industry-insider publication Nitrogen+Syngas explained in its last issue, "as ammonia production moves toward more sustainable and renewable feedstocks the ammonia market is facing a potentially radical change."
Last week, OCP Group announced plans to develop green hydrogen and green ammonia as sustainable raw materials for use in fertilizer production. This includes building pilot plants in both Germany, already under construction, and Morocco, yet to begin construction, as well as "the possible establishment of an African Institute for Solar Ammonia."
McKinsey & Company, the global consulting firm, recently published a report that analyzes the "Decarbonization of industrial sectors," with a focus on the four heaviest emitters: cement, steel, ammonia, and ethylene production. "We conclude that decarbonizing industry is technically possible ... We also identify the drivers of costs associated with decarbonization and the impact it will have on the broader energy system." Of course, "technical and economical hurdles arise," but the report provides valuable analysis of the economic levers that will be required.
In June, ThyssenKrupp announced the launch of its technology for "advanced water electrolysis," which produces carbon-free hydrogen from renewable electricity and water. This "technology enables economical industrial-scale hydrogen plants for energy storage and the production of green chemicals." Two weeks later, in early July, ThyssenKrupp announced that it was moving forward with a demonstration plant in Port Lincoln, South Australia, which had been proposed earlier this year. This will be "one of the first ever commercial plants to produce CO2-free 'green' ammonia from intermittent renewable resources." The German conglomerate is one of the four major ammonia technology licensors, so its actions in the sustainable ammonia space are globally significant.
On July 13, Science magazine, the flagship publication of the American Association for the Advancement of Science (AAAS), published a 2,800-word “feature article" on ammonia energy. The article, headlined, “Liquid sunshine: Ammonia made from sun, air, and water could turn Australia into a renewable energy superpower,” is uniformly open-minded and upbeat. Its opening section ends with a quote from Monash University Professor of Physics and Chemistry Doug MacFarlane; “’Liquid ammonia is liquid energy,’ he says. ‘It's the sustainable technology we need.’” MacFarlane helped launch the Australian chapter of the NH3 Fuel Association.
Two new pilot projects for producing "green ammonia" from renewable electricity are now up and running and successfully producing ammonia. In April 2018, the Ammonia Manufacturing Pilot Plant for Renewable Energy started up at the Fukushima Renewable Energy Institute - AIST (FREA) in Japan. Earlier this week, Siemens launched operations at its Green Ammonia Demonstrator, at the Rutherford Appleton Laboratory outside Oxford in the UK. The commercial product coming out of these plants is not ammonia, however, it is knowledge. While both the FREA and Siemens plants are of similar scale, with respective ammonia capacities of 20 and 30 kg per day, they have very different objectives. At FREA, the pilot project supports catalyst development with the goal of enabling efficient low-pressure, low-temperature ammonia synthesis. At Siemens, the pilot will provide insights into the business case for ammonia as a market-flexible energy storage vector.
Henrik Stiesdal is a distinguished figure in the field of wind energy. As such, he has had ample occasion to contemplate the field’s challenges and opportunities. Recently he concluded that ammonia may become an important part of wind energy’s future.
As part of the sustainable agenda of the UK, the government, research institutions and various enterprises have looked for options to reduce the carbon footprint of the country while ensuring energy independence for several years. As a response, one of the alternatives has been to introduce the use of marine energy via the implementation of a barrage in the Severn Estuary or the development and implementation of Tidal Lagoons located around the Welsh coast. From these alternatives, the tidal lagoon concept seems to be most feasible. Hybrid tidal and wind energy systems will produce vast amounts of energy during off-peak hours that will require the use of energy storage technologies - the size of each proposed tidal lagoon ranges close to ~1.5 GW. Currently, companies involved in the development of these complexes are thinking of batteries, pumped hydro, and ammonia as the potential candidates to provide storage for these vast amounts of energy.