CNPC Launches Green Ethylene Plant Cutting 1.37 Million Tonnes of CO2 Yearly

China National Petroleum Corporation has started operations at the Tarim 1.2 million-tonne-per-annum Phase II Ethylene Project in Korla, Xinjiang, alongside a supporting green and low-carbon demonstration facility, marking what the company describes as the country's first full-chain green and low-carbon ethylene project. The complex is expected to cut carbon emissions by 1.37 million metric tons annually, a reduction the company equates to the carbon sequestration capacity of roughly 365,333 hectares of forest. It runs on approximately 1 billion kilowatt-hours of renewable electricity supplied directly from Tarim Oilfield's photovoltaic facilities each year.

 

How the Closed-Loop Chain Actually Works

 

The project's defining feature is a closed-loop industrial chain connecting green power, carbon capture, blue hydrogen, blue ammonia and lower-carbon fertiliser production into a single integrated system. Ethylene production traditionally generates significant carbon dioxide as a byproduct of the cracking process used to break down hydrocarbons into petrochemical feedstocks, and that CO2 has historically been vented into the atmosphere as a waste stream with no further use.

This facility instead applies what CNPC describes as first-of-its-kind integrated carbon capture technology in China, recovering low-concentration carbon dioxide directly from cracking furnace flue gas before it is emitted. That captured CO2, along with hydrogen recovered as a byproduct of the same processes, is reused within the production process itself rather than treated as waste, feeding into blue hydrogen and blue ammonia production and ultimately into lower-carbon fertiliser manufacturing. Capturing low-concentration CO2 from flue gas is technically more difficult than capturing it from high-concentration industrial sources, since lower concentrations generally require more energy-intensive separation processes, making this application a meaningful technical achievement rather than a routine capture setup.

 

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Why Electrifying the Compressors Matters

 

Beyond carbon capture, the project has replaced thermal power with direct electric drive for its three major ethylene compressors, described as the world's second and China's first domestically developed electric-driven system of this kind for ethylene compression. Ethylene compressors are among the most energy-intensive pieces of equipment in a petrochemical plant, traditionally powered by steam turbines driven by burning fossil fuels on-site.

Shifting that power source from thermal combustion to electricity, particularly electricity sourced directly from the facility's own solar generation, removes a substantial on-site combustion emissions source entirely rather than merely improving its efficiency. Pairing that electrification with the renewable electricity already supplying roughly a billion kilowatt-hours annually to the complex means a significant share of the plant's energy-intensive operations are now running on clean power generated on-site, rather than drawn from a fossil-heavy regional grid.

 

A Marker of Domestic Technology Development

 

The project also reflects a deliberate push toward domestic technological self-sufficiency. Of its 11 major production units, ten use homegrown technologies, nine of which originate from CNPC itself, and five have been applied at industrial scale for the first time anywhere. The overall localisation rate reached 99 percent, with several units, including hydrogenation of pyrolysis gasoline and butadiene rubber production, achieving full domestic technology independence, alongside what the company describes as a breakthrough in domestically manufacturing large-scale extrusion and pelletizing equipment.

That localisation matters strategically beyond this single project, since it demonstrates that China's domestic petrochemical technology sector can now deliver industrial-scale green and low-carbon process equipment without relying on foreign licensing or imported systems, a capability with implications for how quickly similar green petrochemical projects could be replicated elsewhere in the country.

 

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What This Means for the Region

 

Beyond its environmental design, the project is expected to help fill gaps in southern Xinjiang's production of high-end polyolefins, synthetic rubber and other advanced materials, supporting the growth of downstream industrial clusters valued at over 100 billion yuan and contributing to regional economic development and employment in Korla and the surrounding area. Whether the closed-loop carbon capture and hydrogen reuse system performs at the scale and consistency needed to sustain the projected 1.37 million tonnes of annual emissions reductions once the plant reaches full operational maturity, and whether the domestically developed technologies prove reliable enough to be replicated at other petrochemical sites, will determine how significant a template this project becomes for China's broader petrochemical decarbonisation efforts.