Carbon capture and storage (CCS) is a group of technologies designed to capture carbon dioxide (CO₂), transport it, and place it in a long-term storage location instead of releasing it directly into the atmosphere. When captured CO₂ is reused in industrial applications, the broader term carbon capture, utilisation and storage (CCUS) is commonly used.
CCS has become an important area of industrial decarbonization solutions because some sectors, including cement, steel, chemicals, refining, and certain power applications, can be difficult to decarbonize through electrification alone. Carbon capture engineering combines chemical processes, mechanical equipment, compression systems, pipelines, monitoring technologies, and geological science.
The overall CCS chain can be viewed as:
Capture → Conditioning → Compression → Transport → Injection → Monitoring
Carbon capture technology companies are developing different approaches for industrial facilities as well as direct air capture technology, which removes CO₂ from ambient air.
Industrial emissions management is becoming increasingly important as governments and companies pursue lower greenhouse-gas emissions. CCS does not eliminate the need for energy efficiency, renewable energy, electrification, or other emission-reduction measures. Instead, it can complement those approaches where direct emissions are difficult to avoid.
The technology can be particularly relevant to:
Carbon capture investment is also being influenced by government incentives, carbon markets, emissions regulations, industrial policy, and the development of shared CO₂ transport and storage infrastructure.
Carbon capture systems are generally classified according to where CO₂ is separated from a gas stream.
| Capture Type | Basic Principle | Common Applications |
|---|---|---|
| Post-combustion capture | CO₂ is separated from exhaust gases after combustion | Power plants, cement, industrial facilities |
| Pre-combustion capture | Carbon is separated before combustion or conversion | Hydrogen, gasification, some industrial processes |
| Oxy-fuel capture | Fuel is burned using oxygen-rich conditions to create a CO₂-rich exhaust | Power and industrial processes |
| Direct air capture | CO₂ is removed directly from ambient air | Carbon removal projects |
| Industrial process capture | CO₂ is separated from process gases | Cement, ammonia, hydrogen, steel |
Post-combustion systems frequently use solvents, membranes, adsorption materials, or other separation technologies. Pre-combustion systems can involve gasification and hydrogen-related processes. Oxy-fuel systems change combustion conditions so the resulting gas stream contains a higher concentration of CO₂.
Direct air capture technology works differently because atmospheric CO₂ is much more dilute than CO₂ in many industrial exhaust streams. As a result, specialized equipment and energy systems are required.
A typical carbon capture installation contains several interconnected equipment categories:
The selection depends on gas composition, temperature, pressure, CO₂ concentration, plant configuration, and the intended destination of the captured gas.
For carbon capture project development, engineers normally assess the entire chain rather than looking only at the capture unit. Transport capacity, storage geology, monitoring requirements, electricity demand, water use, permitting, and long-term liability can all influence project design.
Geological storage is the primary approach for permanent CO₂ sequestration at large scale. Suitable formations may include deep saline formations and certain depleted oil and gas reservoirs.
Before injection, geological assessments examine factors such as:
Captured CO₂ is normally compressed into a dense phase for transportation and injection. Monitoring systems can then track pressure, plume movement, well integrity, and other indicators.
Carbon sequestration technology can also involve mineralization, where CO₂ reacts with suitable minerals to form stable carbonate compounds. This approach is being researched for both geological and industrial applications.
CCS can have several potential applications when appropriately designed and regulated.
Reducing industrial emissions
Cement manufacturing produces process emissions that cannot all be eliminated simply by changing the energy source. Carbon capture can therefore become one component of broader industrial decarbonization solutions.
Supporting hard-to-abate industries
Steel, chemicals, fertilizers, refining, and some other industries can have concentrated CO₂ streams that may be technically suitable for capture.
Carbon removal
When CO₂ is captured from biomass-based processes and permanently stored, or when direct air capture is combined with durable storage, the resulting system can potentially provide carbon removal. The climate benefit depends on the full lifecycle emissions and permanence of storage.
Industrial carbon management
Carbon management solutions increasingly consider capture, transportation, utilization, permanent storage, monitoring, and verification as one integrated system.
CO₂ utilization
CCU can convert captured CO₂ into products such as synthetic fuels, chemicals, building materials, and certain industrial compounds. The climate value depends on how long the carbon remains out of the atmosphere and the energy used in the conversion process.
The following are examples of established companies active in carbon capture, CO₂ management, engineering, equipment, or storage development. This is an illustrative list rather than a ranking.
The appropriate technology provider depends on the emissions source, capture method, storage location, project scale, regulatory environment, and technical requirements.
CCUS activity increased across several regions during 2025 and the first half of 2026. The International Energy Agency reported in March 2026 that global CCUS development continued to advance despite project delays and cancellations. Its latest database update found that capture capacity either operational or under construction had increased by more than 10% compared with the previous database edition.
Norway has become an important European reference point. The IEA reported that the Northern Lights system became the world's first dedicated CO₂ storage hub to begin operations, marking a significant development for shared transport and storage infrastructure.
In India, the Department of Science and Technology launched the country's first dedicated R&D roadmap for CCUS on December 2, 2025. The roadmap focuses on coordinated research, industrial demonstration, and technologies relevant to sectors such as power, cement, and steel.
India also expanded CCUS research activity during 2025. In May 2025, the government announced a cluster of five CCU testbeds for the cement sector to demonstrate technologies in industrial environments.
On May 11, 2026, IIT Bombay inaugurated India's first integrated CCUS field laboratory, combining carbon capture, utilization, and geological sequestration research. The facility includes research into CO₂ capture from ambient air and industrial emissions and geological assessment of the Deccan Traps.
Government data published in April 2026 also identified operational, under-execution, and proposed carbon capture and utilization projects across several Indian states.
India does not currently have one single nationwide law dedicated exclusively to every aspect of CCS. Projects can instead interact with environmental regulations, industrial approvals, geological and land requirements, emissions frameworks, and sector-specific rules.
Government policy has increasingly focused on research and demonstration. The Department of Science and Technology has supported CCUS research through international initiatives and national programs.
A major development was India's CCUS R&D Roadmap launched in December 2025. It identifies CCUS as a technology area relevant to India's long-term net-zero pathway and emphasizes research, collaboration, industrial testbeds, and technology deployment.
The Union Budget 2026–27 also highlighted CCUS technology development for higher technology-readiness applications across several industrial sectors, including chemicals.
For an individual project, regulatory requirements can vary according to location, industry, injection method, environmental impact, land requirements, and the infrastructure involved. Project developers should therefore consult the relevant Indian central and state authorities before making regulatory decisions.
Several resources can help researchers, engineers, investors, policymakers, and students understand the CCS landscape:
What is carbon capture and storage?
Carbon capture and storage is a process that separates CO₂ from industrial emissions or other sources, transports the captured gas, and stores it in a location intended for long-term containment.
What is the difference between CCS and CCUS?
CCS focuses on capture and permanent storage. CCUS includes utilization, meaning captured CO₂ can also be converted or incorporated into certain products or industrial processes.
What industries can use carbon capture?
Cement, steel, chemicals, fertilizers, hydrogen, refining, natural-gas processing, and selected power applications are among the industries being considered for carbon capture. Suitability depends on the emissions source and project conditions.
What is direct air capture technology?
Direct air capture removes CO₂ directly from ambient air rather than concentrating it from an industrial exhaust stream. The captured CO₂ can potentially be stored permanently or used in selected applications.
Is CCS a complete solution for climate change?
No. CCS is one technology within a wider emissions-reduction strategy. Its effectiveness depends on capture performance, energy use, transport, storage permanence, monitoring, and lifecycle emissions. Other measures such as efficiency, electrification, renewable energy, and process innovation remain important.
Carbon capture and storage is evolving from individual capture installations toward integrated carbon management systems involving capture, compression, transportation, geological storage, utilization, monitoring, and verification.
Its strongest potential is generally associated with industrial applications where emissions are difficult to eliminate through other technologies. At the same time, CCS involves technical, geological, environmental, infrastructure, regulatory, and financial challenges.
Recent developments in 2025 and 2026 show continuing activity in industrial carbon capture, direct air capture research, CO₂ storage hubs, CCUS testbeds, and government-backed research programs. For India, the December 2025 CCUS R&D roadmap and the 2026 IIT Bombay field laboratory demonstrate increasing attention to domestic carbon sequestration technology and industrial decarbonization.
For anyone researching carbon capture solutions, the most useful approach is to evaluate the complete system rather than focusing on capture equipment alone. Understanding the emissions source, capture method, transport network, storage geology, monitoring framework, policy environment, and lifecycle performance provides a more balanced view of this developing technology.
Any financial model for carbon capture investment or project development should use project-specific technical assumptions. Informational estimates for project budgets or packages can vary substantially by location, technology, capacity, financing structure, energy requirements, and regulatory conditions.
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