This Tiny Machine Makes Petrol Using Just Air and Water

California-based startup Aircela has unveiled what it calls the first working machine in the US that creates petrol directly from air. The prototype, roughly the size of a large refrigerator, was publicly demonstrated on a New York City rooftop in late May.

Air to Fuel in Three Steps

The Aircela system works by capturing carbon dioxide from the air and combining it with hydrogen obtained through electrolysis of water. The resulting mixture is then synthesized into methanol, which is chemically converted into gasoline using a process called methanol-to-gasoline (MTG).

The machine is divided into three hexagonal modules, each dedicated to one of these core functions: carbon capture, electrolysis, and fuel synthesis. The design mimics the honeycomb structures found in nature, offering strength and scalability.

Compact, Scalable, and Drop-In Ready

Unlike other air-to-fuel efforts focused on centralized, industrial-scale plants, Aircela’s approach centers on small, modular, and local units. These can be placed in remote locations or areas with limited access to traditional fuel infrastructure. Each unit includes a standard petrol nozzle, replicating the familiar refueling experience.

The resulting petrol is drop-in compatible, meaning it can be used in any vehicle or engine that runs on traditional gasoline. And when powered by renewable energy, the process is carbon-neutral, releasing no more CO₂ than it captures.

Total Petrol Output

An individual Aircela unit can produce about one gallon (4.55 liters) of fuel per day if operated continuously. While modest in output, the company’s strategy focuses on deploying multiple linked units to scale production without the infrastructure demands of a centralized facility.

“By designing compact, modular machines, we reduce logistics costs and accelerate fossil-free fuel adoption where it’s needed most,” said Liz White, Aircela’s Head of Industrial Design.

Designed for Accessibility and Sustainability

From its color-coded panels symbolizing air, water, and sunlight, to its reusable carbon sorbent and custom fuel pump, the Aircela machine is engineered not just for function but also user experience. Its design emphasizes ease of use, even for non-expert operators, and was created entirely in-house.

The machine has caught the attention of major industries, with Maersk Growth, a division of the Danish shipping giant, among its investors. The maritime industry is one of many sectors that could benefit from the generation of fossil-free, on-site fuel.