Marathon Petroleum CCUS Strategy: $14 M Comstock Deal, $2.5 B NGL Facility, and Biofuel Partnerships (2021-2025)

Marathon Petroleum CCUS Projects Signal a Shift from Planning to Execution

In 2025, Marathon Petroleum’s decarbonization strategy has pivoted from acknowledging Carbon Capture, Utilization, and Sequestration (CCUS) as a long-term tool to executing a pragmatic, dual-pronged approach that prioritizes immediate operational efficiencies and strategic investments in carbon utilization through biofuels. This marks a tangible shift from the planning and positioning phase of 2021-2024. The company is now actively deploying capital into modernizing existing assets for near-term emission reductions while simultaneously building capabilities in adjacent low-carbon markets like Sustainable Aviation Fuel (SAF) and renewable natural gas (RNG), using partnerships to de-risk its entry into these sectors.

Marathon’s Focus on Operational Efficiency

A key pillar of Marathon Petroleum‘s strategy involves modernizing its current infrastructure to reduce its carbon footprint. This approach generates immediate, measurable results without the high capital risk and long development timelines associated with large-scale geological sequestration projects. It allows the company to improve its environmental performance while maintaining high asset utilization.

• In 2025, the company initiated a project with the engineering firm WSP to upgrade a 1980 s-era cogeneration plant at one of its refineries, aiming to boost steam and electricity reliability while lowering CO₂ output.
• This follows earlier efforts to implement proven technologies across its portfolio, such as installing wet gas scrubbers at its Anacortes refinery to control emissions, demonstrating a consistent focus on optimizing its existing operational base.
• This focus on efficiency allows Marathon Petroleum to maintain high refinery utilization rates of around 90%, ensuring financial performance during the transition.

Pivot to Carbon Utilization via Biofuels

While improving existing assets, Marathon Petroleum is also directing strategic investments toward carbon utilization, primarily through the production of advanced biofuels. This diversifies its product portfolio and positions the company in growing low-carbon fuel markets, effectively using biomass as a captured-carbon feedstock. This contrasts with the large-scale sequestration hubs being developed by competitors like BP and Occidental Petroleum.

• A significant move in February 2025 was the $14 million investment in Comstock Inc. to accelerate the development of its technology for refining lignocellulosic biomass.
• The company is also advancing in the Sustainable Aviation Fuel (SAF) market through its joint venture with Neste, which is expected to begin producing significant volumes of SAF.
• In May 2025, Marathon Petroleum further expanded its bioenergy portfolio with a strategic investment in LF Bioenergy, a developer of renewable natural gas (RNG) from dairy waste.

$2.5 B in Capital, Marathon Petroleum Hedging Hydrocarbon and Biofuel Investments

Marathon Petroleum‘s 2025 capital allocation reveals a deliberate hedging strategy, balancing major investments in traditional energy infrastructure with targeted funding for emerging low-carbon technologies. This dual-track approach allows the company to secure near-term cash flow from its core hydrocarbon business while simultaneously building a foothold in the future of energy. This financial discipline stands in contrast to the multi-billion-dollar, pure-play CCUS announcements from peers like Total Energies.

Table: Marathon Petroleum Strategic Investments (2025)

Marathon Petroleum 4 Key Partnerships Anchoring its Low-Carbon Strategy (2025)

Marathon Petroleum is leveraging strategic partnerships to accelerate its decarbonization strategy in 2025, mitigating risk and gaining technical expertise without bearing the full cost of research and development. These collaborations are focused on two distinct areas: enhancing the efficiency of its current refining operations and gaining access to emerging biofuel markets. This partnership-heavy model allows for capital efficiency and faster market entry compared to vertically integrated approaches.

Table: Marathon Petroleum Key Decarbonization Partnerships (2025)

US-Centric Strategy, Marathon Petroleum Optimizes Existing Footprint

Marathon Petroleum‘s decarbonization activities are geographically concentrated within the United States, focused on optimizing its existing asset base rather than expanding into new international regions for carbon sequestration. This US-centric strategy leverages the company’s extensive domestic infrastructure, particularly its refining locations and the midstream network of its master limited partnership, MPLX. The approach is designed to capitalize on federal incentives like the 45 Q tax credit while minimizing geopolitical and logistical risks associated with cross-border projects.

Focus on Texas and Refinery Locations

The company’s major capital projects are sited to enhance its current operations. The strategy is to integrate decarbonization efforts directly into its primary revenue-generating assets. This contrasts with companies like Equinor, which are pursuing large-scale offshore storage projects in the North Sea.

• The $2.5 billion NGL fractionation and export facility announced in early 2025 is located in Texas, a hub for Marathon‘s midstream operations and a key region for North American energy logistics.
• The modernization of the cogeneration plant with WSP is taking place at one of its existing US refineries, directly targeting Scope 1 emissions at the source.
• Investments in biofuel partners like Comstock and LF Bioenergy are also focused on developing North American supply chains, aligning with the company’s domestic operational footprint.

CCS Market Poised for 500%+ Growth, Reaching $54.73B by 2035
The Carbon Capture and Storage (CCS) market is projected for explosive growth, expanding over 500% from $8.92 billion in 2025 to $54.73 billion by 2035. This dramatic increase signals rapid industrial adoption and significant investment driven by global decarbonization goals.

(Source: Precedence Research — via Marathon Petroleum NGL Strategy 2025, $1.4B ONEOK JV)

Technology Maturity: Marathon Petroleum Balances Proven Tech with Early-Stage Bets

Marathon Petroleum is executing a bifurcated technology strategy, deploying mature, proven technologies for immediate emission reductions in its core business while making calculated, early-stage investments in next-generation biofuel technologies. This balanced approach mitigates technology risk by separating its core operational improvements from its future growth options. The period from 2021 to 2024 was characterized by evaluation, while 2025 marks a clear commitment to this dual-pathway model.

Proven Technologies for Core Operations

For its refining assets, Marathon Petroleum relies on commercially available and de-risked technologies to enhance efficiency and reduce emissions. This ensures operational reliability and predictable returns on investment.

• The 2025 cogeneration plant modernization project with WSP uses established engineering principles to upgrade existing infrastructure, a low-risk method for carbon reduction.
• The prior installation of wet gas scrubbers represents another example of deploying proven, off-the-shelf environmental control technology to meet regulatory requirements and reduce emissions.

Early-Stage Investments in Future Fuels

In parallel, the company uses partnerships to invest in technologies that are earlier in their commercialization lifecycle but offer significant growth potential. This allows Marathon Petroleum to gain exposure to disruptive technologies without taking on the full burden of R&D.

• The investment in Comstock Inc. supports a proprietary refining process for lignocellulosic biomass, a technology that is not yet at full commercial scale but promises access to a vast, non-food feedstock source.
• The partnership with LF Bioenergy targets the RNG market, which is still maturing but is supported by growing policy incentives for decarbonizing the gas grid and transport sectors.

Post-Combustion Leads Global Carbon Capture Market Share
Post-Combustion Capture dominates the global carbon capture market in 2025, accounting for 50.0% of all technology types. This indicates its current maturity and widespread adoption as the leading method for industrial emissions reduction.

Carbon Capture Market Poised for Double-Digit Growth to $6.6B by 2025
The global carbon capture market, valued at $6.6 billion in 2025, is projected to grow significantly at a 10.6% CAGR from 2026-2035. This rapid expansion highlights the critical need for scalable, proven technologies to meet increasing decarbonization demands from major industrial players.

(Source: market.us — via Carbon Capture And Storage Market Size | CAGR of 10.6%)

SWOT Analysis of Marathon Petroleum’s Pragmatic CCUS Strategy

Marathon Petroleum‘s 2025 CCUS strategy is defined by capital discipline and a focus on carbon utilization over large-scale sequestration, creating a distinct risk and opportunity profile compared to its peers. By prioritizing operational efficiency and biofuel partnerships, the company strengthens its near-term financial position but potentially cedes first-mover advantages in dedicated CO₂ infrastructure. The shift from 2021-2023 planning to 2024-2025 execution has clarified this strategic direction.

Table: SWOT Analysis for Marathon Petroleum Carbon Capture Initiatives for 2025: Key Projects, Strategies and Market Impact

Scenario Modelling: Marathon Petroleum’s MPLX Pivot to CO 2 Transport

The most critical signal to watch for Marathon Petroleum is the point at which it pivots its midstream partnership, MPLX, from exclusively transporting hydrocarbons to developing and operating CO₂ transportation infrastructure. The company is currently in a preparatory phase, building capabilities in adjacent markets like hydrogen and biofuels and observing the market. A definitive move by MPLX into CO₂ service would signal a major strategic shift from its current “utilization-first” stance toward embracing large-scale sequestration.

• If this happens: Watch for MPLX to announce a pilot project or a non-binding open season for a CO₂ pipeline, likely connecting one of Marathon‘s refineries to a potential sequestration site. This would indicate that the internal economic models, supported by policy like the 45 Q credit, now favor direct sequestration.
• Then watch this: Look for new partnerships with pure-play CO₂ sequestration developers or industrial emitters located near Marathon‘s existing pipeline corridors. An agreement to transport third-party CO₂ would confirm a move to build a multi-customer CO₂ network.
• This could be happening: This shift would likely be triggered by increased certainty in federal carbon pricing or storage permitting regulations, or if competitors begin to gain a significant cost advantage by decarbonizing their own operations via dedicated CCS infrastructure. The investments in LF Bioenergy and Comstock are initial steps in understanding and managing complex, low-carbon commodity supply chains, a necessary skill for a future CO₂ management business.

The questions your competitors are already asking

This report covers one angle of Marathon Petroleum’s decarbonization strategy. The questions that matter most depend on your work.

• Competitor carbon capture hub projects US
• Profitability of renewable natural gas projects
• Sustainable aviation fuel feedstock availability
• US natural gas liquids export forecast

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