ENERGY LAW AND DIRECT AIR CAPTURE GRID INTEGRATION FRAMEWORKS

1. Introduction

Direct air capture (DAC) grid integration frameworks govern how facilities that remove carbon dioxide directly from ambient air are connected to, supplied by, and coordinated with electricity networks. DAC can require substantial electricity and heat, meaning large-scale projects may function as significant industrial loads. Their legal treatment therefore intersects with electricity interconnection rules, transmission planning, tariff regulation, demand response, renewable-energy procurement, emissions accounting, and carbon-removal incentives.

The core regulatory challenge is ensuring that DAC deployment produces genuine net carbon removal without imposing unjustified reliability costs or infrastructure burdens on other electricity consumers.

2. DAC as a Large Electricity Load

The U.S. Department of Energy defines direct air capture as technology that removes CO₂ directly from ambient air for permanent storage or conversion into products. DOE's Regional DAC Hubs programme is intended to demonstrate commercial-scale DAC systems, including hubs capable of capturing at least one million metric tons of CO₂ annually.

When a DAC plant requires transmission-level electricity service, utilities and grid operators may need to study its effect on network capacity, congestion, resource adequacy, voltage, reliability, and required upgrades.

FERC's current large-load proceedings are especially relevant. In 2026, FERC directed regional grid operators to justify or reform tariff rules governing large industrial and commercial loads and stressed reliability, affordability, interconnection speed, and fair cost allocation.

3. Interconnection and Cost Allocation

A DAC facility may require new substations, transmission upgrades, generation capacity, or dedicated supply infrastructure. Grid-integration rules therefore need to determine:

who pays for interconnection studies;

whether network upgrades benefit only the DAC project or the wider system;

responsibility for stranded costs if the project is cancelled;

minimum-demand or capacity-payment obligations;

curtailment rights; and

whether flexible operation can reduce infrastructure requirements.

FERC's large-load docket considers reforms for loads generally above 20 MW seeking transmission-level interconnection, illustrating the emerging legal framework within which large DAC installations may be assessed.

4. Demand Response and Flexible DAC Operation

DAC facilities may potentially operate flexibly by reducing capture activity during periods of grid stress and increasing operation during periods of abundant electricity supply.

Demand-response programmes can reward this flexibility. A DAC operator might enter interruptible-service agreements, participate through aggregators, or accept curtailment in return for reduced network charges.

Such arrangements require measurable baselines, telemetry, settlement rules, dispatch obligations, and penalties for non-performance.

5. Carbon Integrity and Electricity Supply

DAC integration cannot be assessed solely by the amount of CO₂ physically captured. The emissions associated with electricity and heat consumed by the facility can materially affect the project's net carbon-removal performance.

DOE's best-practice guidance therefore emphasises life-cycle assessment when evaluating DAC with storage, including indirect emissions and environmental trade-offs.

This creates a legal connection between grid procurement and carbon accounting. Renewable power-purchase agreements, onsite clean generation, storage, hourly matching, or other electricity-sourcing arrangements may therefore affect whether a DAC project achieves its claimed environmental performance.

6. Case Law: FERC v Electric Power Supply Association

Case Name/Citation: Federal Energy Regulatory Commission v Electric Power Supply Association, 577 U.S. 260 (2016).

Facts: FERC adopted Order No. 745, governing compensation to electricity consumers that reduce consumption in organized wholesale markets.

Legal Issue: Whether FERC could regulate wholesale-market demand response even though participation involved decisions by retail electricity consumers.

Judgment: The U.S. Supreme Court upheld FERC's authority.

Legal Principle/Ratio: FERC may regulate practices directly affecting wholesale electricity rates, including compensated demand-response participation.

Significance: A grid-connected DAC facility capable of reducing electricity consumption may potentially participate in wholesale demand-response arrangements where applicable market rules permit it. The case establishes the broader jurisdictional foundation for treating flexible loads as market resources.

7. Case Law: New York v FERC

Case Name/Citation: New York v Federal Energy Regulatory Commission, 535 U.S. 1 (2002).

Facts: States challenged FERC's open-access transmission rules and its regulation of interstate electricity transmission.

Legal Issue: Whether FERC possessed jurisdiction over transmission used for interstate electricity transactions.

Judgment: The Supreme Court upheld FERC's authority over interstate transmission within the Federal Power Act framework.

Legal Principle/Ratio: Federal authority extends to interstate electricity transmission, while important retail and local matters remain within state jurisdiction.

Significance: DAC grid integration may therefore involve overlapping federal and state authority: transmission access and wholesale-market practices may fall under FERC, while retail service, siting, and local distribution can remain state-regulated.

8. Conclusion

Direct air capture grid integration requires coordinated regulation of large-load interconnection, transmission planning, cost allocation, flexible demand, clean-energy procurement, reliability, and lifecycle carbon accounting. DAC facilities should not be treated merely as carbon-removal technologies; once connected to the electricity system, they become significant grid participants whose operating patterns can affect reliability, rates, and emissions. Effective legal frameworks therefore link carbon-removal policy with electricity-market governance and ensure that claimed climate benefits reflect the real energy consumed by the capture process.