Emerging TechnologiesSustainability Tech

Carbon Capture

Overview

Direct Answer

Carbon capture encompasses technologies that extract carbon dioxide from industrial exhaust streams, ambient air, or point sources, followed by compression, transport, and either permanent geological storage or utilisation in products and processes. This approach addresses both direct emissions reduction and atmospheric carbon removal.

How It Works

Point-source capture uses solvents, sorbents, or membranes to separate CO₂ from flue gases at industrial facilities or power plants. Direct air capture (DAC) employs similar chemistry to extract CO₂ directly from ambient air using large contactors or solid sorbents. Captured gas is then compressed, transported via pipeline or truck, and either injected into geological formations for permanent sequestration or converted into chemicals, beverages, building materials, or synthetic fuels.

Why It Matters

Organisations face regulatory pressure to reduce Scope 1 and 2 emissions whilst meeting net-zero commitments. Point-source capture offers immediate emissions reductions at high concentration, reducing abatement costs. DAC provides a pathway for removing legacy atmospheric carbon, though economics remain less favourable than point-source approaches.

Common Applications

Industrial applications include cement and steel production, natural gas processing, and chemical manufacturing. Utilisation pathways span enhanced oil recovery, beverage carbonation, and synthesis of building materials. Geological storage occurs in saline aquifers and depleted oil and gas reservoirs.

Key Considerations

Energy intensity significantly affects net climate benefit; capture powered by renewable sources is substantially more effective than fossil-fuel-powered systems. Permanence of storage, regulatory frameworks, and scalability economics remain critical constraints for widespread deployment.

Cited Across coldai.org2 pages mention Carbon Capture

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