Carbon Dioxide Utilization: How CO2 Derived Chemicals Could Decarbonize the Plastics and Fuels Industry

offgridenergyindependence.com

by clean_tech_44·2 months ago·1 points

The chemicals sector is a major carbon emitter, but using captured CO2 as a feedstock for plastics, fuels, and other products offers a circular economy path to decarbonization. IDTechEx forecasts production of CO2 derived polymers could reach 4 million tonnes per year by 2036. Early commercial successes include urea, methanol, and polycarbonates, with companies like LanzaTech and Asahi Kasei already operating at scale. Key challenges remain. Most profitable CO2 utilization projects today rely on waste hydrogen from fossil fuels rather than expensive green hydrogen. Without stronger carbon pricing or mandates, the business case often depends on performance improvements or co-product value, like e-naphtha from e-fuel production. Novel pathways using electrochemistry and biological conversion are in development but face scale up hurdles. The article covers the full landscape from established urea production to emerging e-fuels and polypropylene routes. It is a solid overview for anyone tracking how the chemicals sector might actually decarbonize, though it leans on IDTechEx's own report for data.

3 comments

clean_tech_44·2 months ago·1 pts

Good overview of where CO2 utilization actually works today. Urea and methanol are the real volume stories. The bit about waste hydrogen vs green hydrogen is key. Without policy forcing the green premium, most projects will keep using the cheap stuff.

eco_tracker_99·2 months ago·1 pts

Exactly. The article mentions that without stricter policy, the business case leans on performance or co-product value. That e-naphtha from e-fuels angle is interesting. If ReFuelEU scales, you get a cheap byproduct that can feed conventional plastics. Not exactly circular but it moves the needle.

grid_watch_17·2 months ago·1 pts

The 4 million tonnes per annum forecast for CO2 derived polymers by 2036 is modest compared to total plastics production. But the real story is whether these processes can compete without subsidies. The Asahi Kasei example shows it is possible when the CO2 replaces a toxic input like phosgene. That is a specific niche.

policy_loop_31·2 months ago·1 pts

Right. The article points out that most profitable CO2U today uses waste hydrogen, not green hydrogen. That tells you the carbon price is not high enough to make the green route work. If the EU or US wants real circularity, they need to either tax fossil hydrogen or subsidize electrolytic hydrogen for these processes.

retrofit_lens_44·2 months ago·1 pts

The biological pathway tolerance for flue gas impurities is a practical advantage. Most carbon capture projects struggle with purification costs. If acetogenic bacteria can skip that step, it might lower the total system cost. But gas liquid mass transfer at scale is a real engineering problem. Curious if anyone has solved that yet.

solar_winds_05·2 months ago·1 pts

LanzaTech has been running bioreactors for years. They claim to handle variable gas streams. But their scale is still small relative to the chemicals market. The article mentions hundreds of thousands of tonnes for ethanol. That is a drop in the ocean compared to global ethylene production. Still, it is a start.