Rio Tinto and Hydro Invest $45M to Cut Aluminum Emissions with Carbon Capture

A Major Step Toward Decarbonizing Aluminum Production

Rio Tinto and Hydro are teaming up to tackle one of the biggest challenges in aluminum production—carbon emissions.

The two industry leaders are investing $45 million over the next five years to develop carbon capture technologies specifically for aluminum smelting.

Aluminum is everywhere, from cars to beverage cans, but producing it comes at a cost. The industry is responsible for about 2% of global CO₂ emissions, with the electrolysis process alone contributing 791 million metric tons. Finding an effective way to capture and store these emissions could be a game-changer for the sector.

"This initiative is a crucial step toward reducing emissions in aluminum production while ensuring the industry remains competitive in a [low-carbon](https://decarbonfuse.com/posts/rio-tinto-s-bioiron-proves-successful-for-low-carbon-iron-making} economy," said a spokesperson for the project.

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Why Aluminum Smelting Needs a Carbon Capture Solution

The process of making aluminum is highly energy-intensive, with the majority of emissions coming from electrolysis. This step relies on carbon anodes, which release CO₂ during production, making it one of the hardest-to-decarbonize industries.

While many sectors have successfully adopted carbon capture and storage (CCS) technologies, applying it to aluminum smelting is far more complex due to the low concentration of CO₂ emissions in smelter exhaust gases.

This is where Rio Tinto and Hydro’s investment comes into play. Their carbon-capture partnership will focus on:

• Developing carbon capture technology that works with aluminum smelting’s unique emission profile.
  
• Testing solutions in real-world conditions at Rio Tinto’s European facilities and Hydro’s Norwegian sites.
  
• Scaling up successful methods to apply them across global aluminum production.

The Challenges of Capturing Carbon in Aluminum Smelting

Capturing CO₂ from aluminum smelters is significantly more difficult than in industries like power generation. Traditional CCS methods aren’t designed for low-concentration emissions, making it costly and inefficient.

There are two main approaches being explored:

1. Point Source Carbon Capture

This method captures emissions directly at the source but needs to be adapted for the lower CO₂ levels found in aluminum smelters. The challenge is to make it cost-effective and scalable.

2. Direct Air Capture (DAC)

While typically used to remove CO₂ from the atmosphere, DAC could be modified to work within aluminum production, helping to pull more carbon from smelter exhausts.

Both approaches require major innovation, which is why Rio Tinto and Hydro are investing in research and development.

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Collaborating for a Greener Future

This joint effort is part of a broader industry-wide push to decarbonize aluminum production. Both companies are already leading initiatives to make low-carbon aluminum a reality:

• ELYSIS (Rio Tinto & Alcoa): A joint venture developing carbon-free aluminum smelting technology.
  
• HalZero (Hydro): A breakthrough process that eliminates CO₂ emissions from aluminum production entirely.
  

While ELYSIS and HalZero focus on eliminating emissions, carbon capture could provide an immediate way to cut emissions from existing smelters. This investment aims to bridge the gap between the industry’s current footprint and its net-zero goals.

"Carbon capture for aluminum production isn’t just about compliance—it’s about securing the industry’s future in a world that demands lower emissions," said a company executive.

The Growing Demand for Low-Carbon Aluminum

As industries shift toward sustainable materials, demand for low-carbon aluminum is rising. The automotive, construction, and packaging sectors are actively seeking greener alternatives to meet their climate targets.

According to CRU International, global aluminum demand is expected to grow 40% by 2030, increasing from 86.2 million metric tons in 2020 to 119.5 million metric tons.

Regulatory Pressures and Market Incentives

Governments worldwide are introducing stricter carbon regulations and carbon pricing mechanisms. These policies penalize high-emission industries while rewarding companies that invest in clean technologies.

By developing carbon capture for aluminum smelting, Rio Tinto and Hydro could gain a competitive advantage, positioning themselves as leaders in sustainable aluminum production.

More Than Just Carbon Capture: Other Ways to Cut Emissions

While carbon capture is a critical piece of the puzzle, the aluminum industry is also exploring other ways to cut emissions:

1. Recycled Aluminum

Producing aluminum from recycled materials uses 95% less energy than primary production. Expanding recycling efforts could dramatically lower emissions across the industry.

2. Inert Anodes

Traditional carbon anodes release CO₂ during electrolysis, but inert anodes could eliminate these emissions entirely. This technology is still in development but holds huge potential.

3. Renewable Energy-Powered Smelters

Switching from fossil fuels to renewable energy (such as solar, wind, or hydroelectric power) can significantly cut emissions in aluminum production.

The Road Ahead: Turning Innovation into Reality

This $45 million investment by Rio Tinto and Hydro is a major step toward decarbonizing aluminum. If successful, their work could revolutionize the industry, making low-carbon aluminum the standard rather than the exception.

"This partnership isn’t just about innovation—it’s about ensuring aluminum remains a sustainable material for the future," a company official stated.

As the industry pushes toward net-zero emissions, collaborations like this one will play a pivotal role in shaping a cleaner, more sustainable future for aluminum production.