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(Sharecast News) - PowerHouse Energy said on Thursday that tests at its Feedstock Testing Unit had delivered higher-than-expected hydrogen yields from mixed plastics, bolstering confidence in its waste-to-hydrogen DMG technology and prompting design improvements to boost efficiency.
The AIM-traded company said initial trials using raw plastics had produced results consistent or better than model predictions, while more recent tests using mixed plastics in raw and real waste forms yielded slightly higher hydrogen content in the resulting syngas than anticipated.
Subsequent work had focused on improving the efficiency of downstream systems and optimising the DMG temperature profile.
PowerHouse said it had installed a custom internal plate system, developed with Manchester University using computational fluid dynamics modelling, which has improved heat retention and cut residue carryover.
That design will now be implemented in all future DMG units.
Tests using mixed plastics tailored to the specification for its planned National Hydrogen Australian project showed hydrogen yields at the top end of model predictions, with the company now confident its DMG system can produce 3.0 to 3.5 tonnes per day of hydrogen at 99.999% purity from 40 tonnes per day of mixed plastic feedstock, above its prior estimate of 2.5 to 3.0 tonnes.
"The validation of our DMG system with both native and mixed waste plastics - especially the higher-than-expected hydrogen yields - reinforces our confidence in the technology and its commercial potential," said chief executive Paul Emmitt.
"The design enhancements, developed in collaboration with Manchester University, mark a significant step forward in efficiency and scalability.
"As we continue to optimise the system and explore diverse feedstocks, we are not only advancing our hydrogen production capabilities but also unlocking new pathways for sustainable energy and waste valorisation."
At 1541 BST, shares in PowerHouse Energy Group were up 2.29% at 0.6p.
Reporting by Josh White for Sharecast.com.
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