Green ammonia to fuel Indonesia’s coal-fired plants?

26 September 2023

PT Indo Raya Tenaga (IRT)*, owner/operator of the Jawa 9 and 10 ultrasupercritical coal fired units in Indonesia, has signed a memorandum of understanding with Doosan Enerbility that
will see a study carried out on maximising the utilisation of green ammonia as a possible alternative fuel source for Jawa 9 and 10. These two 1000 MWe units, adjacent to the existing eight-unit 4025 MWe Suralaya coal/biomass fuelled plant in Cilegon, on the west coast of Java island, about 120 km from Jakarta, are currently under execution by Doosan Enerbility, with Doosan ultrasupercritical boilers and Siemens SST-6000 steam turbines, and are close to completion.

Above: Jawa 9 and 10 (photo: Indo Raya Tenaga)

Following IRT’s visits to KEPRI and Doosan test facilities and to KOMIPO’s ultrasupercritical power plant in Korea, it was concluded that utilising green ammonia and green hydrogen for power generation is one of the key programmes in the energy transition roadmap to net zero being pursued by the Korean government. “Presently, Doosan is implementing the optimisation of the ammonia burner with a target of reaching the commercial stage by 2027”, said the CEO of Doosan Power Service in his opening remarks during the visit of IRT to Doosan Enerbility’s facility in Changwon, Korea.

Previously PT Indo Raya Tenaga has concluded a joint study with PT PLN Enjiniring which found that up to 60% green ammonia was a suitable fuel source for the Jawa 9 and 10 boilers, which are equipped with selective catalytic reduction (SCR). IRT notes that SCR is essential in reducing NOx emissions resulting from ammonia co-firing above about 20%.

It was recognised, however, that the ammonia supply chain presents challenges.

Doosan Enerbility has also signed a memorandum of understanding with Indonesia Power (IP)** on “transitioning to eco-friendly power plants” and reducing emissions. With the signing of this MOU, the two companies say they have agreed to “enter into a comprehensive partnership” aimed at pursuing the application of eco-friendly technologies at the Suralaya power plant.

“Doosan Enerbility’s various carbon neutral solutions, such as ammonia co-firing technology, hydrogen gas turbines and hydrogen liquefaction plants, will serve as an effective alternative for Indonesia in achieving its carbon reduction goals,” said Yeonin Jung, president and COO of Doosan Enerbility. “We’re hoping that this MOU will be the start of more active exchanges for pursuing carbon reduction power projects in Indonesia.”

* Joint venture of Barito Pacific (49%) and Indonesia Power (51%)
** A subsidiary of Indonesia’s state-owned PT Perusahaan Listrik Negara (PLN) and the country’s largest electricity supplier, accounting for more than 20 GW of the country’s installed capacity

Jawa 9 and10, with Suralaya behind (photo: Indo Raya Tenaga)

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