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Sulphur 421 Nov-Dec 2025

21 November 2025

Travertine starts operation of demonstration plant

UNITED STATES

Travertine starts operation of demonstration plant

Travertine Technologies, Inc., has begun operations at its demonstration plant in New York state. The core Travertine process demonstrated at this plant combines three major unit operations: salt-splitting electrolysis, caustic direct air capture, and mineralisation. This process produces sulphuric acid, calcium carbonate, and green hydrogen from waste gypsum and carbon dioxide captured directly from the air. The demonstration plant will produce 125 t/a of sulfuric acid, 125 t/a of calcium carbonate, and 55 t/a of carbon dioxide sequestration. The plant will supply sustainable sulphuric acid for local partner Sabin Metal Corporation’s precious metals recycling and refining business.

“This demo plant is an exciting next step as we scale up the core Travertine process. Our process can be used for a number of vital industrial applications, including using our sulphuric acid to produce phosphoric acid for the fertilizer and LFP battery industries with our proprietary phosphoric acid production process,” said Laura Lammers, PhD, founder and CEO of Travertine. “What is unique about Travertine is that we enable carbon-negative critical chemical production without making mineral byproducts that need to be landfilled.”

The Travertine Technologies demonstration plant, Rochester, New York.
PHOTO: TRAVERTINE TECHNOLOGIES

“Sabin Metal has long been committed to precious metals recycling with a focus on chemical reuse, sustainable procurement, and minimising byproducts.

We are pleased to partner with Travertine to incorporate their sustainable sulphuric acid into our process and continue the legacy of innovation in the Rochester area,” said Brent Vesa, technical director at Sabin Metal Corporation.

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