Aduro Reports 88.8% to 90.8% Condensable Hydrocarbon Yield Across Changing Polyolefin Feeds in 75-Hour NGP Campaign

LONDON, Ontario, Sept. 23, 2026 (GLOBE NEWSWIRE) -- Aduro Clean Technologies Inc. (“Aduro” or the “Company”) (Nasdaq: ADUR) (TSX: ACT) (FSE: 9D5), a clean technology company using the power of chemistry to transform lower value feedstocks, like waste plastics, heavy bitumen, and renewable oils, into resources for the 21(st) century, today provided an update on continued progress in the operating campaign program at its Next Generation Process (“NGP”) Pilot Plant.

Highlights * Repeatability across successive campaigns: Multiple NGP campaigns conducted through July, August, and September have demonstrated progressive improvement in NGP process control and operation, while maintaining consistent process and product performance across different feed compositions and operating parameters. * Mixed-polyolefin performance: During the September campaign, condensable hydrocarbon yield was 88.8% with 100% polypropylene (“PP”), 90.8% with an 80:20 PP/polyethylene (“PE”) blend, and 89.2% with a 50:50 PP/PE blend. Condensable hydrocarbon yield represents the recovered liquid and waxy hydrocarbon product and excludes non-condensed hydrocarbon gases. Results were consistent with the objectives of the campaign. * Latest campaign: The September campaign ran for 75 hours and processed approximately 758 kilograms of polymer across three controlled polyolefin feed compositions. * Consistent product quality and improving process control: Product-quality indicators remained consistent with prior campaign results, and the system returned to target operating conditions approximately two hours sooner than in the comparable prior run following changes in process conditions. * Iterative engineering: Operating findings are being used to refine equipment, instrumentation, controls, and operating procedures, with modifications implemented between campaigns and evaluated in subsequent runs. * Direct FOAK integration: NGP operating data continue to be used as part of Early Works engineering and procurement activities for the First-of-a-Kind (“FOAK”) Program at Chemelot. * Next stage: The NGP program is expected to progress to longer campaigns using waste-plastic materials supplied by prospective FOAK feedstock partners, including feedstocks with broader compositional characteristics increasingly representative of those being evaluated for the FOAK Plant. The latest September campaign extended this work over a longer operating period, progressing from the established PP operating reference to progressively higher PE content while maintaining product-quality indicators consistent with prior campaign results. Condensable hydrocarbon yield was 88.8% on 100% PP, 90.8% on the 80:20 PP/PE blend, and 89.2% on the 50:50 PP/PE blend.