Scientists at Chiba University in Japan have developed a new carbon material that could significantly reduce the cost and energy required for carbon capture, offering a promising step toward large-scale efforts to cut greenhouse gas emissions.
The research introduces a new class of carbon materials called “viciazites,” designed to capture carbon dioxide (CO2) more effectively while releasing it at much lower temperatures than conventional methods. The breakthrough could make carbon capture systems more practical and affordable for industries struggling to reduce emissions.
Why Existing Carbon Capture Is Expensive
Carbon capture technology is considered one of the important tools in reducing atmospheric CO2, but its high cost has slowed adoption.
The most widely used method today is aqueous amine scrubbing, which captures CO2 using liquid chemical solutions. However, this process requires heating the liquid to temperatures above 100°C to release the trapped carbon dioxide and reuse the system.
This large energy requirement increases operational costs and makes the technology less attractive for widespread use.
New Carbon Material Changes the Equation
To address this problem, researchers led by Associate Professor Yasuhiro Yamada and Associate Professor Tomonori Ohba created a new type of solid carbon adsorbent that can capture CO2 using less energy.
The new materials, called viciazites, are designed with nitrogen-containing functional groups placed next to each other in specific patterns. This arrangement improves how carbon dioxide interacts with the material and makes it easier to release the gas later.
Unlike traditional carbon adsorbents, where nitrogen atoms are randomly distributed, the new method gives scientists better control over the material’s structure.
How the Material Was Developed
The research team created three types of viciazites, each with different nitrogen arrangements.
One version used adjacent primary amine groups, another used adjacent pyrrolic nitrogen, and the third used adjacent pyridinic nitrogen.
To build the material, researchers used a three-step process involving heating coronene, treating it with bromine, and then exposing it to ammonia gas. This process achieved 76 percent precision in placing nitrogen atoms exactly where needed.
Two additional materials were created using different chemical compounds, reaching 82 percent and 60 percent selectivity respectively.
Researchers used advanced methods including nuclear magnetic resonance spectroscopy, X-ray photoelectron spectroscopy, and computer modeling to confirm the atomic structure.
Lower Temperature Means Lower Cost
Tests showed the material with adjacent amine groups delivered the most significant improvement.
Researchers found that most of the captured carbon dioxide could be released at temperatures below 60°C, which is far lower than traditional carbon capture systems.
This means industries could potentially use low-grade waste heat already generated by factories to power the carbon capture process instead of needing extra energy.
According to Dr. Yamada, combining this low-temperature desorption process with industrial waste heat could reduce operating costs substantially and improve the efficiency of carbon capture systems.
The material with pyrrolic nitrogen also showed strong CO2 capture performance, although it required higher temperatures for release. Researchers noted it may provide better long-term durability due to stronger chemical stability.
Potential Beyond Carbon Capture
The researchers believe the discovery could have uses beyond climate technology.
Because the surface properties of viciazites can be carefully controlled, the materials may also be useful in removing heavy metal ions, industrial filtration, and chemical catalyst applications.
The study provides a framework for creating “designer” carbon materials with precise molecular structures tailored for specific industrial uses.
A Step Toward Cleaner Industry
The study, published in Carbon Journal, offers a potential breakthrough in making carbon capture more practical for industries that produce large amounts of emissions.
Researchers said this development is an important step in building next-generation carbon capture technologies that are both cost-effective and energy efficient.
As governments and industries look for ways to meet climate goals, cheaper and scalable carbon capture solutions like this could play a major role in reducing global carbon emissions.