Chinese engineers have turned to the same gas that gives soda its fizz. They aim to hurl small rockets skyward without the usual fireball at the pad. The idea sounds simple on paper. Yet it could reshape how commercial space firms operate in a country racing to launch more often and cheaper than before.
Supercritical carbon dioxide sits at the heart of the concept. Push the familiar CO2 past certain temperature and pressure points and it behaves like a dense fluid with gas-like flow. Release it suddenly under high pressure and the rapid expansion provides a powerful cold push. The rocket lifts off first. Its engines fire only after it clears a safe height. No flames scorch the launch structure below.
From Soda Fizz to Launch Thrust
This cold-launch approach stands in sharp contrast to standard hot firings. Traditional rockets ignite engines while still bolted to the pad. Exhaust temperatures exceed 3,000 degrees Celsius. That heat demands heavy infrastructure. Flame trenches. Reinforced towers. Constant repairs after each mission. All of it adds expense and delays. “In commercial space launch scenarios requiring high frequency and rapid response, this incurs high time and financial costs, directly affecting launch pacing and response speed,” Zhiyu Aerospace Technology stated, according to a TechRadar report.
But the new method promises to change that equation. No more destructive heat on the ground. Less maintenance. Faster turnaround. The gas itself is non-toxic. Launches produce no harmful emissions near the site. Ablation on the vehicle drops. Fuel consumption during the initial ascent falls because the rocket doesn’t fight gravity with engines running from zero altitude. Safety rises too. A malfunction on the pad carries lower risk when engines stay silent until airborne.
The project comes from Zhiyu Aerospace Technology, also known as Z-Trak Space. This Hunan-based startup teamed with Chiyang Space Power Technology Company. They announced the collaboration on July 1, 2026. Founder Zhang Zihan, who studied aerospace engineering at Hong Kong Polytechnic University, sees big potential. He said the approach would “fundamentally change the model for small liquid-fuel launch vehicles” if scaled successfully, the South China Morning Post reported. The company echoed the upside. It offers “high safety, low costs, clean environmental performance and low ablation.”
China’s commercial space sector has grown fast. It completed 50 launches last year. That total represented more than half of all national missions. Pressure builds to cut expenses and boost cadence. Traditional pads tie operators to fixed sites with high overhead. A cold-launch system that uses mobile or simplified infrastructure could free them. Smaller vehicles for rideshare payloads or dedicated smallsat missions stand to gain most.
Yet questions remain. Supercritical CO2 systems must deliver consistent pressure. The rocket needs reliable ignition at altitude. Integration with liquid-fuel stages adds complexity. No public test data has surfaced yet on full-scale flights. Engineers will need to prove the push gives enough initial velocity without compromising stability. Still, the concept aligns with broader experiments across China’s private space firms. Many chase reusable tech, methane engines, and novel propellants to compete with global players.
Recent coverage highlights the announcement’s timing. China’s commercial launchers already experiment with quicker response. This CO2 method could complement those efforts. It avoids some environmental headaches tied to conventional exhaust. And it taps a gas that’s abundant, cheap, and easy to handle compared with exotic cryogenics.
Interest in CO2 for space applications isn’t entirely new. Separate Chinese work has explored converting the gas into rocket fuels in orbit using electricity and catalysts. That research, detailed in a February 2025 Jalopnik article, produced oxygen and ethylene aboard the space station. Such efforts show Beijing’s interest in carbon dioxide across the space value chain. The cold-launch project takes a different tack. It uses the gas for mechanical ejection rather than combustion.
Environmental calculations around rockets draw increasing scrutiny. Standard launches emit CO2, water vapor, soot, and nitrogen oxides. A cold start with supercritical CO2 sidesteps some of those plumes at ground level. Proponents argue it supports cleaner operations overall. Whether the full lifecycle proves greener depends on how the CO2 is sourced and pressurized. But the pitch lands well amid global pushes for sustainable access to space.
Implementation hurdles exist. Scaling the pressure vessels. Managing phase changes during release. Ensuring the rocket’s guidance copes with the unique ascent profile. Chinese regulators will examine safety data closely before approving operational flights. If it works, though, the payoff looks attractive. Lower infrastructure bills. Shorter intervals between launches. Reduced wear on vehicles and pads. For a sector that logged dozens of missions in 2025 alone, those gains add up.
Z-Trak and its partner haven’t detailed a first flight timeline. Their announcement signals serious intent. It fits a pattern of bold bets by China’s newer aerospace outfits. Some have reached orbit. Others test reusable stages or novel engines. This one stands out for its simplicity and the everyday association with a household beverage. Who knew the stuff that carbonates Coca-Cola might one day help loft satellites?
The broader race continues. LandSpace’s Zhuque-3 reusable rocket attempts, covered by Space.com in October 2025, show parallel pushes toward cost reduction through reuse. Methane engines tested by state and private groups promise cleaner burns than kerosene. The CO2 cold-launch adds another tool. One that could make small, responsive missions more routine.
Success here wouldn’t replace heavy-lift vehicles. It targets a niche. Yet that niche grows as demand for frequent small payload delivery expands. Constellations, technology demonstrators, scientific probes. All benefit from cheaper rides. If Zhiyu delivers on its claims, operators might soon choose a cold CO2 boost over traditional hot fires. The launch pads would stay cooler. The schedules would tighten. And the economics might finally favor speed over brute force.
China’s space entrepreneurs keep testing limits. This fizzy-gas concept ranks among the more creative. Its progress will bear watching. Early signs point to genuine engineering thought. Not mere publicity. The coming tests will decide if soda gas really belongs in the launch business.
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