Mr. Andre Mainella reports

PYROGENESIS ANNOUNCES BLOCK SALE OF HPQ SILICON INC. SHARES TO ITS PRESIDENT AND CEO

PyroGenesis Canada Inc. has completed a block sale of 3,779,700 shares in HPQ Silicon Inc. to P. Peter Pascali, president and chief executive officer of PyroGenesis, for an aggregate purchase price of $661,447.50, representing a per-share price of 17.5 cents. The sale remains subject to Toronto Stock Exchange approval.

The transaction was approved unanimously by the board of directors of PyroGenesis with Mr. Pascali abstaining and will close immediately following receipt of regulatory approval.

"This sale will bring PyroGenesis an influx of cash on favourable terms," said Andre Mainella, chief financial officer of PyroGenesis. "It also underscores the continued support of Mr. Pascali of PyroGenesis and HPQ."

The company and HPQ are engaged in several long-term projects together, most notably the fumed silica reactor (FSR) project and the Purevap quartz reduction reactor (QRR) project.

The FSR project, being conducted in conjunction with HPQ Silica Polvere Inc. (HPQ Polvere), a wholly owned subsidiary of HPQ, is an initiative to create fumed silica from quartz in a single step. The QRR project is an initiative to create high-purity silicon from quartz in a single step using a plasma reactor. For both projects, PyroGenesis is the exclusive supplier of the technology. For the FSR project, the company benefits from a royalty payment representing 10 per cent of HPQ Polvere's eventual sales, with set minimums. This royalty stream can, at any time, be converted by PyroGenesis into a 50-per-cent ownership in HPQ's remaining equity stake in HPQ Polvere.

Mr. Mainella added: "We are excited about what the future holds for the projects in development with HPQ. Together, we continue to develop what we believe represents groundbreaking approaches for producing in-demand materials for heavy industry. We look forward to continuing our fruitful collaborations with HPQ."

About PyroGenesis Canada Inc.

PyroGenesis, a high-tech company, is a proud leader in the design, development, manufacture and commercialization of advanced plasma processes and sustainable solutions that 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.

About HPQ Silicon Inc.

HPQ Silicon is a Quebec-based TSX Venture Exchange Tier 1 industrial issuer. HPQ is developing, with the support of world-class technology partners PyroGenesis and Novacium SAS, new green processes crucial to make the critical materials needed to reach net zero emissions. HPQ activities are centred around the following four 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 being developed for HPQ by PyroGenesis;
2. Becoming a zero-CO2 (carbon dioxide) low-cost (capex and opex) producer of high purity silicon (2N+ to 4N) using Purevap quartz reduction reactors (QRR), a proprietary technology owned by HPQ being developed for HPQ by PyroGenesis;
3. Becoming a producer of silicon-based anode materials for battery applications with the assistance of Novacium;
4. HPQ Silicon affiliate Novacium is developing a low-carbon, chemical base on demand and high-pressure autonomous hydrogen production system.

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