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Singapore to Expand Pilot Project to Boost Ocean’s CO2 Absorption Capacity

Singapore to Expand Pilot Project to Boost Ocean’s CO2 Absorption Capacity

Singapore is planning to expand a pilot project that uses electricity to extract CO2 from seawater, in a bid to boost the ocean’s capacity to absorb carbon dioxide emissions.

The project, which is being led by the Public Utilities Board (PUB), is currently extracting 100 kilograms of CO2 a day using technology designed by U.S. firm Equatic.

PUB is aiming to secure funds by the end of the year to build a demonstration plant with a daily capacity of 10 tons, and will look at expanding further.

The project is part of Singapore’s efforts to reduce its carbon emissions. The country has set a target of net-zero emissions by 2050.

The Intergovernmental Panel on Climate Change (IPCC) has said that the removal of CO2 from the atmosphere will be as important as cutting emissions when it comes to curbing temperature rises.

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  • Equatic founder Gaurav Sant stressed the commercial potential of the project. “What makes this a resilient commercial opportunity is that you can essentially have the same equipment to give you two products: carbon credits and hydrogen,” he said.

“The carbon credits can be sold to companies that are looking to offset their emissions, while the hydrogen can be used as a fuel or for other applications,” he added.

  • It could also profit by selling calcium carbonate to the local building industry, he added.

The project is one of several pilot OCDR ventures around the world. Some rely on bringing nutrient-rich deep-sea water to the surface to stimulate seaweed growth, while others aim to reduce ocean acidification levels and thereby boost CO2 uptake.

Some experts warn that the potential ecological impact of these technologies is still unknown. More than 200 scientists said in an open letter that OCDR research should be prioritised not only to maximise its potential, but also head off potential risks.

“We need to be very careful about how we deploy these technologies,” said Sir David King, head of the Climate Crisis Advisory Group and one of the letter’s signatories.

“We don’t want to do something that inadvertently makes the problem worse,” he added.

Related Article: Singapore’s Clean Energy Sector Poised for 80% Workforce Growth, and Sees New Grant for Energy Storage Solutions

Sir David King, head of the Climate Crisis Advisory Group and one of the letter’s signatories, said he favoured nature-based approaches, and was sceptical about the efficacy of energy-intensive OCDR technologies like the Equatic venture, which will cost a lot to pump water in and out of the plant.

“I think we need to focus on nature-based solutions, like planting trees and restoring wetlands,” he said.

“These are much more cost-effective and have a much lower risk of unintended consequences,” he added.

However, he said that more investment in OCDR research was needed urgently, as billions of tons of CO2 need to be removed from the atmosphere.

“What is needed today is to shorten the experimental timeline, and that really demands much more funding,” he said.

“If somebody came up with a few billion dollars, I believe we would accelerate these programmes to the level that is really needed,” he added.

The Singapore pilot project is a promising step in the development of OCDR technologies. However, more research is needed to assess the environmental impact of these technologies and to ensure that they are cost-effective.

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