UTILIZATION OF CARBON DIOXIDE AS CHEMICAL FEEDSTOCK
While experts in various fields discuss the potential of carbon capture and storage (CCS) technologies, the utilization of carbon dioxide (CO2) as chemical feedstock is attracting renewed and rapidly growing interest. The two approaches do not compete; rather, they are complementary: CCS aims CO2 to capture and store huge quantities of CO2, while the chemical exploitation of aims to generate value and develop better and more-efficient processes from a limited part of the waste stream. One of the promising areas of CO2 utilisation is its application as a raw material for polymer synthesis, as large amounts of CO2 can be fixed for comparatively long periods and value is generated through production of polymer-based materials. Among many other examples, the reaction of CO2 with highly reactive epoxides is a prime example of a feasible and exothermic reaction. Depending on the type of catalyst, the reaction can be steered to furnish polyethercarbonates with short polyether segments linked with carbonate groups (for use as polyols in urethane chemistry), alternating polycarbonates with aliphatic backbone (for use as low permeable barrier material or binder in ceramics), or cyclic carbonates (for use as green solvents).
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