A startup based in Nova Scotia is currently running trials to develop a technique that captures and stores more carbon in the ocean. The company, pHathom, aims to enhance the ocean’s ability to absorb carbon dioxide by converting it into a form that can be securely stored in the ocean for thousands of years.
The pilot project, taking place at the Huntsman Marine Science Centre in St. Andrews, New Brunswick, is a crucial step in demonstrating the safety and effectiveness of the approach. pHathom’s method involves replicating a natural process where raindrops absorb carbon dioxide from the atmosphere, becoming slightly acidic. When these raindrops interact with alkaline rocks like limestone, they convert the carbon dioxide into bicarbonate, which can then be stored in the ocean for an extended period.
By utilizing a reactor, pHathom takes in seawater and exposes it to the exhaust of a biomass power plant to increase its acidity. This acidic water is then mixed with limestone particles in a tank to convert the carbon dioxide into bicarbonate before being reintroduced into the ocean with the same pH level as regular seawater.
Several other companies in Nova Scotia are also exploring similar carbon removal methods, known as alkalinity enhancement. pHathom’s approach stands out for its use of highly concentrated carbon dioxide, enhancing efficiency. The pilot phase targets capturing 0.1 tonnes of carbon dioxide daily, with the goal of scaling up operations in Nova Scotia next year.
While the potential of these technologies for carbon removal is promising, challenges such as energy consumption and scalability remain. Researchers and experts emphasize the need to continue transitioning away from fossil fuels while exploring innovative solutions to combat climate change.
Despite uncertainties in the market due to recent policy changes, pHathom remains optimistic about the future impact of their technology. The company believes that as global awareness and action on climate change increase, their proven methods will play a crucial role in addressing carbon emissions effectively.