Mr. Bernard Tourillon reports

HPQ'S LATEST PILOT TEST DELIVERS HIGHER-PURITY, HIGHER-QUALITY FUMED SILICA WHILE VALIDATING SEMI-CONTINUOUS REACTOR OPERATION

HPQ Silicon Inc. has received new results from a leading global fumed silica manufacturer (LGFSM) regarding the evaluation of materials produced during phase 1 test No. 5.

Milestones: first production of material under semi-continuous feedstock feeding protocol

Technology supplier PyroGenesis Inc. has informed the company that, in addition to successfully replicating the production and collection of material in the dedicated product recovery unit (commonly referred to as the baghouse), HPQ Silica Polvere Inc.'s (HSPI) proprietary fumed silica reactor (FSR) pilot plant operated under a semi-continuous feeding approach during phase 1 test No. 5 -- two key steps in advancing the FSR toward commercial validation.

Significant improvement achieved in the purity and quality of fumed silica produced

Material analysis conducted by the leading global fumed silica manufacturer (LGFSM) confirmed several notable improvements in the fumed silica produced during phase 1 test No. 5 compared to test No. 4:

• Carbon-based impurities were reduced by 85 per cent;
• Other impurities were significantly lowered, with reductions ranging from 50 per cent to 86 per cent;
• Material surface area increased by 57 per cent, indicating a substantial enhancement in product performance characteristics.

"Taken together, the results from phase 1 tests 4 and 5, along with operational data from the three earlier tests, validate the successful 20-fold scale-up of the fumed silica reactor -- from lab to pilot scale, and from batch to semi-continuous production," said Bernard Tourillon, president and chief executive officer of HPQ Silicon and HPQ Silica Polvere. "These results confirm that key material properties can be reliably reproduced and even improved at larger scale, establishing a solid foundation for future process optimization."

Phase 2 testing to focus on advancing material surface area performance

With the successful validation of process replicability at pilot scale, testing is now progressing into phase 2, which will focus on further improving the material's surface area. The upcoming tests aim to produce fumed silica materials with BET surface areas up to 300 square metres per gram.

"Having overcome the key technical challenges to reach this phase 1 completion milestone, we believe the remaining steps -- specifically achieving the targeted surface area range with the FSR -- are now well within reach," added Mr. Tourillon.

"With phase 1 testing successfully completed, we now look forward to the launch of phase 2 with great anticipation," added Mr. Tourillon.

About HPQ Silicon Inc.

HPQ Silicon is a Quebec-based TSX Venture Exchange industrial issuer. HPQ is a technology company focused on innovation in advanced materials and critical process development. In partnership with world-class technology leaders PyroGenesis Inc. and Novacium -- of which HPQ is a shareholder -- the company is developing the materials and process technologies essential to achieving net-zero goals.

HPQ activities are centred around the following pillars:

1. Becoming a green, low-cost (capex and opex) manufacturer of fumed silica using the fumed silica reactor, a proprietary technology owned by HPQ Silica Polvere, being developed for HSPI by PyroGenesis.
2. Working with R&D (research and development) partner Novacium, to become a producer of silicon-based anode materials for battery applications.
3. Developing Innovative processes to generate and use hydrogen:
   1. Metagene, a low-carbon, chemical-based, on-demand, high-pressure autonomous hydrogen production system, is being developed by Novacium of which HPQ holds the exclusive North American (Canada, United States and Mexico) licence.
   2. Waste to Energy (W2E), a new process to transform black aluminum dross into a valuable resource, is being developed by Novacium, of which HPQ holds the exclusive North American (Canada, U.S. and Mexico) licence. HPQ is also a shareholder in Novacium.
4. Becoming a zero-CO2 low-cost (capex and opex) producer of high-purity silicon (2N+ to 4N) using the company's Purevap quartz reduction reactors (QRR), a proprietary technology owned by HPQ being developed for HPQ by PyroGenesis.

About PyroGenesis Inc.

PyroGenesis, a high-tech company, is a proud leader in the design, development, manufacture and commercialization of advanced plasma processes and sustainable solutions which reduce greenhouse gases (GHG) and are economically attractive alternatives to conventional dirty processes. PyroGenesis has created proprietary, patented and advanced plasma technologies that are being vetted and adopted by multiple multibillion-dollar industry leaders in four massive markets: iron ore pelletization, aluminum, waste management and additive manufacturing. With a team of experienced engineers, scientists and technicians working out of its Montreal office, and its 3,800-square-metre and 2,940-square-metre manufacturing facilities, PyroGenesis maintains its competitive advantage by remaining at the forefront of technology development and commercialization. The operations are ISO 9001:2015 and AS9100D certified, having been ISO certified since 1997. PyroGenesis's shares are publicly traded on the TSX in Canada (TSX: PYR), the OTCQX in the United States (OTCQX: PYRGF) and the Frankfurt Stock Exchange in Germany (FRA: 8PY).

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