Pentaethylenehexamine-C₆₀ for Temperature Consistent Carbon Capture

摘要

Fullerene C₆₀ is directly added to and reacted with plain pentaethylenehexamine (PEHA) to give PEHA-functionalized C₆₀ powders. The CO₂ capture performance of PEHA-C₆₀ appears to be consistent across a range of temperatures wider than that of polyethyleneimine (PEI)-modified C₆₀, whose high CO₂ capture performance drops rapidly with decreasing temperature. At about 30 °C, the CO₂ capture capacity of PEHA-C₆₀ is six times higher, 65 mg CO₂/g sorbent, than that of PEI-C₆₀, 10 mg/g. In contrast to PEI, PEHA reacts with C₆₀ to form products of greater porosity and smaller particles size that allow for a faster contact between CO₂ and amine functions. This in turns translates into a lower energy requirement for CO₂ sorption and desorption.