CarbonTube CO2-to-Carbon-Nanotube System Enters Mass Production: High-Value Nanomaterials from Exhaust
NanoCarbon's CarbonTube system has reached mass production, using electrocatalysis to convert CO2 from industrial exhaust directly into high-purity carbon nanotubes, producing approximately $5,000 worth of nanotubes per ton of CO2 processed.
Carbon materials company NanoCarbon announced on April 30 that its CarbonTube CO2-to-carbon-nanotube system has officially entered mass production. The technology uses an electrocatalytic reaction to convert CO2 captured from industrial exhaust directly into high-purity carbon nanotubes — a high-value nanomaterial with broad applications in batteries, composites, and electronics.
The core of the process is NanoCarbon's proprietary copper-based nanocatalyst, which selectively reduces CO2 into carbon nanotubes rather than other carbon byproducts at specific electrochemical potentials. A single system processes one ton of CO2 per day, yielding roughly 200 kilograms of carbon nanotubes.
At current market prices of about $25 per kilogram, each ton of CO2 generates approximately $5,000 in product value — far exceeding the cost of carbon capture itself (around $100 per ton). This makes CarbonTube one of the few carbon-utilization technologies that is genuinely profitable.
NanoCarbon has signed deployment contracts with three steel mills and two cement plants.
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