1. Introduction

The integration of Carbon Capture, Utilisation and Storage (CCUS) with hydrogen production is an important part of the emerging legal framework for low-carbon hydrogen. In conventional hydrogen production from natural gas, particularly through steam methane reforming (SMR) or autothermal reforming, substantial quantities of carbon dioxide (CO₂) are generated. CCUS allows a significant portion of this CO₂ to be captured, transported and permanently stored or, where legally permitted, utilised.

This creates what is commonly called “blue hydrogen”: hydrogen produced from fossil feedstocks with carbon capture and storage. The legal significance of this integration is that hydrogen regulation can no longer be considered separately from carbon-storage law, environmental permitting, emissions trading, pipeline regulation, climate law, land-use planning and industrial safety law.

The UK provides a particularly developed example. Its Energy Act 2023 establishes legislative powers for both low-carbon hydrogen production and CCUS business models, while the 2026 offshore regulations have further integrated safety regulation for CCUS and offshore hydrogen production. (Legislation.gov.uk)

2. Meaning of CCUS-Hydrogen Integration

A CCUS-enabled hydrogen project generally contains five interconnected stages:

Feedstock supply – usually natural gas or another hydrocarbon.

Hydrogen production – commonly SMR or autothermal reforming.

CO₂ capture – separation of CO₂ from process gases.

CO₂ transport – generally through pipelines or other approved transportation systems.

CO₂ storage or utilisation – permanent geological storage or an authorised utilisation pathway.

The legal chain therefore looks like:

Natural gas → hydrogen production → CO₂ capture → CO₂ transport → geological storage

Each stage can be governed by a different regulatory instrument.

For example, UK environmental guidance expressly recognises hydrogen production using methane or refinery fuel gas together with capture of the resulting CO₂ for permanent geological storage. Such hydrogen plants are subject to environmental permitting requirements, while the carbon-capture installation can constitute a separately regulated carbon-capture activity. (GOV.UK)

3. Why Legal Integration Is Necessary

A hydrogen plant cannot realistically claim to be “low carbon” merely because it has a carbon-capture unit.

The legal framework must determine:

how much CO₂ must be captured;

how emissions are measured;

whether upstream methane emissions are considered;

whether captured CO₂ must actually reach permanent storage;

who owns the captured CO₂;

who bears liability for leakage;

how CO₂ pipelines are regulated;

whether hydrogen qualifies for government financial support;

what environmental permits are required;

what happens if the storage facility becomes unavailable; and

how emissions are accounted for under carbon-pricing systems.

Consequently, hydrogen law and CCUS law become legally interdependent.

4. Hydrogen Production Regulation

Hydrogen-production legislation generally regulates the production process, environmental performance and eligibility for financial support.

The UK Energy Act 2023, for example, gives the Secretary of State powers to establish hydrogen production revenue-support contracts and designate a hydrogen-production counterparty. It also defines a low-carbon hydrogen producer by reference to activities expected to contribute to greenhouse-gas reductions. (Legislation.gov.uk)

This is significant because blue hydrogen projects require sufficient regulatory certainty to finance both the hydrogen facility and the associated CCUS infrastructure.

The legal framework therefore potentially links:

Hydrogen production contract + CO₂ transport contract + CO₂ storage arrangement.

The UK legislation separately provides for revenue-support arrangements for hydrogen production and for CO₂ transport and storage. (Legislation.gov.uk)

5. Carbon Capture Regulation

Carbon capture is the first legal bridge between hydrogen production and CCUS.

During hydrogen production from natural gas, carbon dioxide is generated as part of the chemical process. The capture system must therefore be designed to satisfy environmental and technical requirements.

UK regulatory guidance identifies hydrogen production from methane or refinery fuel gas with carbon capture for geological storage as an emerging industrial technique. Environmental permits may establish emission limits and other conditions based on the regulator's assessment of appropriate techniques. (GOV.UK)

This illustrates an important principle:

The existence of carbon capture does not remove the hydrogen producer from environmental regulation.

Instead, the capture facility itself becomes part of the environmental compliance architecture.

6. CO₂ Transport Law

After capture, CO₂ must be transported safely to its storage location.

This introduces another layer of law involving:

pipeline construction;

land rights;

transportation licences;

safety standards;

access rights;

third-party access;

emergency response;

pipeline integrity;

environmental assessment; and

cross-border transportation where applicable.

The UK Energy Act 2023 establishes an economic-regulation and licensing framework for CO₂ transport and storage, including a role for Ofgem as economic regulator. (Legislation.gov.uk)

The 2026 UK regulatory amendments additionally bring CO₂ pipelines associated with CCUS within the offshore safety regime. HSE guidance states that CO₂ pipelines carrying CO₂ in fluid phase in CCUS operations are treated as major-accident-hazard pipelines. (HSE)

Thus, a blue-hydrogen project must satisfy not only hydrogen-production requirements but also the safety requirements applicable to its CO₂ transportation network.

7. Geological Storage and Long-Term Liability

The most legally sensitive component of CCUS is usually permanent geological storage.

A legal regime must address:

selection of storage sites;

storage licensing;

geological assessment;

monitoring;

verification;

leakage;

corrective measures;

closure of storage sites;

post-closure monitoring; and

transfer of liability.

This is particularly important for hydrogen because the environmental credibility of blue hydrogen depends partly upon what happens to its captured carbon.

If captured CO₂ subsequently escapes from a storage site, questions arise concerning:

Who is legally responsible—the hydrogen producer, capture operator, pipeline operator or storage operator?

A well-designed legal framework therefore separates operational responsibilities while establishing a clear liability chain.

The UK Energy Act 2023 also gives the North Sea Transition Authority powers concerning information retention, reporting and disclosure by carbon-storage licence holders. (Legislation.gov.uk)

8. Carbon Accounting and Hydrogen Classification

One of the most important legal issues is how low-carbon hydrogen is defined.

A hydrogen project may use carbon capture, but the actual climate performance depends upon:

capture efficiency;

process emissions;

energy consumption;

upstream methane emissions;

CO₂ transportation emissions;

storage permanence; and

methane leakage from natural-gas supply.

Therefore, hydrogen legislation increasingly requires some form of carbon-intensity methodology.

The central legal question becomes:

When does hydrogen produced from fossil feedstock with CCUS legally qualify as “low-carbon hydrogen”?

This is critical because eligibility for subsidies, hydrogen-production contracts, certification schemes and public procurement may depend on satisfying a prescribed emissions threshold.

9. Emissions Trading and CCUS-Hydrogen Projects

Carbon pricing can also interact with hydrogen production.

Where hydrogen production is covered by an emissions-trading system, the producer may have obligations relating to greenhouse-gas emissions.

The UK Emissions Trading Scheme framework, for example, specifically identifies hydrogen and synthesis-gas production by reforming or partial oxidation above specified capacity thresholds and separately regulates capture, transportation and geological storage activities. (Legislation.gov.uk)

The legal treatment of captured CO₂ therefore becomes important because the producer must demonstrate the status of the CO₂ within the applicable emissions-accounting framework.

This creates a chain of legal verification:

Hydrogen production → captured CO₂ → transport → storage → monitoring → emissions accounting.

10. Environmental Impact Assessment

Large integrated hydrogen-CCUS projects may involve:

hydrogen production facilities;

natural-gas infrastructure;

CO₂ pipelines;

compressor stations;

storage wells;

offshore infrastructure;

electricity connections; and

associated industrial development.

Consequently, environmental-impact assessment and planning law can become major components of project approval.

A regulator may have to examine not only the hydrogen plant but also the environmental consequences of the associated CCUS infrastructure.

11. Safety Regulation

Hydrogen and CO₂ create different safety risks.

Hydrogen

Hydrogen is:

highly flammable;

capable of forming explosive mixtures with air; and

capable of creating specific risks in enclosed spaces and pipelines.

CO₂

CO₂ is non-flammable but can create serious risks because high concentrations can cause asphyxiation.

The legal framework must therefore regulate both systems.

The UK's 2026 CCUS and offshore-hydrogen amendments expressly extend existing offshore safety requirements to CCUS installations, CO₂ pipelines and offshore hydrogen production. Operators must comply with safety-case, notification, emergency-response and incident-reporting requirements. (HSE)

12. Public Funding and Revenue Support

CCUS-enabled hydrogen is capital intensive. The economic risk is therefore an important part of its legal architecture.

The UK Energy Act 2023 enables government financial assistance for:

low-carbon hydrogen production;

hydrogen transport;

hydrogen storage;

carbon capture; and

CO₂ transport and storage.

The legislation also allows competitive allocation mechanisms for hydrogen-production and carbon-capture support. (Legislation.gov.uk)

The legal significance is substantial: government support is transformed from a general policy aspiration into a contractual and statutory framework capable of supporting private investment.

13. Case Law

Because large-scale integrated hydrogen-CCUS projects are relatively new, direct judicial decisions specifically concerning blue-hydrogen production and CCUS remain limited. However, recent CCUS litigation provides important principles for understanding how courts approach these projects.

A. R (Boswell) v Secretary of State for Energy Security and Net Zero [2025] EWCA Civ 669

This is one of the most relevant recent UK authorities.

The case concerned the proposed Net Zero Teesside gas-fired power station incorporating post-combustion CCS, together with CO₂ gathering, compression and offshore transportation infrastructure.

The claimant challenged the government's assessment of greenhouse-gas impacts in granting development consent. The Court of Appeal considered whether the Secretary of State had committed a legal error in assessing the significance of the project's GHG emissions. (Bailii)

Legal significance

The case demonstrates that:

CCUS does not automatically eliminate climate-related planning scrutiny.

A project containing CCS can still have legally relevant greenhouse-gas emissions.

Decision-makers must properly consider the project's climate impacts.

Courts can review whether the statutory decision-making process properly considered those impacts.

This principle is directly relevant to hydrogen-CCUS projects because carbon capture cannot be treated as a legal exemption from environmental assessment.

B. R (Boswell) v Secretary of State [2024] EWHC 2128 (Admin)

The earlier High Court proceedings concerned the same Net Zero Teesside project.

The project consisted of a gas-fired power station with post-combustion carbon capture, a CO₂ gathering network, a compressor station and an offshore CO₂ export pipeline. (Bailii)

The case illustrates the importance of considering a CCUS project as an integrated infrastructure system rather than examining the capture plant in isolation.

That reasoning has strong relevance for hydrogen projects where the hydrogen plant and CCUS infrastructure are technically and legally interconnected.

C. ClientEarth v Secretary of State for Business, Energy and Industrial Strategy [2021] EWCA Civ 43

The case concerned development consent for new gas-fired generation at Drax, with provision for carbon capture and storage.

The Court of Appeal considered challenges concerning the Secretary of State's approach under the Planning Act 2008. The project included substantial generating capacity and provision associated with CCS. (Bailii)

Relevance to hydrogen-CCUS law

The case illustrates that:

climate impacts remain relevant to infrastructure consenting;

CCS does not automatically determine the legality of a project;

planning authorities must apply the relevant statutory and policy framework; and

judicial review can examine whether that framework has been lawfully applied.

D. European CCS experience: Porto Tolle

The European Commission's review of the implementation of the EU CCS framework recorded the termination of the Porto Tolle CCS project after the Italian State Council annulled the environmental permit for the associated power plant. (EUR-Lex)

This demonstrates a broader legal lesson:

CCUS projects depend upon a functioning environmental-permitting framework, not merely upon technical feasibility or government climate policy.

14. Application to India

India is developing a regulatory environment for hydrogen and carbon-management technologies, although the legal architecture is not yet as institutionally integrated as the UK's CCUS-hydrogen framework.

For India, integration of CCUS with hydrogen production would potentially involve:

the Energy Conservation Act framework;

the National Green Hydrogen Mission;

environmental-clearance requirements;

air and water pollution regulation;

hazardous-substance regulation;

petroleum and natural-gas regulation;

pipeline regulation;

geological-storage regulation;

carbon-market rules; and

contractual arrangements for carbon transport and storage.

A future Indian legal framework for blue hydrogen would particularly need to establish a carbon-intensity threshold and MRV system determining whether hydrogen produced using CCUS qualifies as low-carbon or clean hydrogen.

15. Key Legal Issues

16. Major Legal Principle

The central principle emerging from the regulatory framework and recent CCUS litigation is:

CCUS should be legally integrated into hydrogen production rather than treated as a separate technological add-on.

A hydrogen project cannot be properly regulated merely by examining hydrogen output. The law must examine the entire carbon chain:

Feedstock → Hydrogen production → CO₂ generation → Capture → Conditioning → Transport → Storage → Monitoring → Verification → Liability.

Failure at any stage can affect the environmental and legal status of the entire project.

17. Conclusion

Integration of CCUS with hydrogen production represents a shift from traditional sector-specific regulation toward integrated energy-system governance.

The legal framework must coordinate hydrogen-production law with:

climate law;

environmental permitting;

carbon markets;

CO₂ transport regulation;

geological-storage law;

industrial safety;

planning law;

MRV requirements; and

government revenue-support mechanisms.

The UK Energy Act 2023 demonstrates this integrated approach by creating statutory mechanisms for both hydrogen-production support and CCUS infrastructure. The 2026 offshore regulatory amendments further demonstrate how hydrogen and CCUS safety regimes can be brought within a common regulatory architecture. (Legislation.gov.uk)

The Boswell litigation is particularly important because it confirms that the presence of CCS does not remove a major infrastructure project from rigorous climate and planning scrutiny. (Bailii)

For future energy law, the most important regulatory challenge will therefore be ensuring that “low-carbon hydrogen” is legally connected to demonstrable carbon capture, transport, permanent storage and verified lifecycle emissions, rather than simply to the installation of a carbon-capture facility.