The Origin Energy and ConocoPhillips-led Australia Pacific LNG (APLNG) project has started loading refrigerants to its Curtis Island LNG facility in Queensland, marking a significant achievement in the commissioning and start-up phase of the $24.7 billion development.

Propane and ethylene, two refrigerants used to cool the natural gas into a liquid, will continue to arrive on Curtis Island over coming weeks. They play a key role in the optimized cascade process, the liquefaction technology owned by APLNG shareholder ConocoPhillips.

APLNG chief executive, Page Maxson, said that substantial effort had been placed on completing safety control systems and commissioning the ground flare prior to refrigerants arriving on site.

“The arrival of the refrigerants signifies a key step toward starting up the first LNG train. It enables us to meet the next milestones including test runs of the compressors, followed by final commissioning of remaining units of the first LNG train,” Maxson said.

“Today’s achievement keeps us firmly on track for first LNG export in the second half of this calendar year.”

APLNG is due to begin production in the September quarter.