Global CO2 emissions for 2022 reached 36.1 gigatons, and this consumed 13–36% of the remaining carbon budget to limit warming to 1.5°C, which means our permissible emissions could be depleted within two years.
Fig 1. Schematic of the sustainable carbon capture hydrogels. Credit: Youhong Guoemissions for 2022 reached 36.1 gigatons, and this consumed 13–36% of the remaining carbon budget to limit warming to 1.5°C, which means our permissible emissions could be depleted within two years.directly from the atmosphere at any location, but their practicality is limited by the higher energy needs and overall costs.
To overcome these challenges, we developed sustainable carbon-capture hydrogels as a step-change material for COcapture with high uptake and exceptionally low regeneration energy . The study is published in the journalIn contrast to other sorbent materials where the inert water leads to energy-intensive thermal regeneration, water in hydrogels has a reduced evaporation enthalpy that can contribute to a lowered regeneration energy.
We also highlight another advantage of our SCCH, which is the ease of preparation. The gel can be made with commercially available materials, dissolved in water, poured into a mold, and followed by a freeze-drying process. This is scalable and durable in ambient air, which benefits practical application. With such a low regeneration temperature, our new hydrogels can be a game-changing materials platform for more sustainable air quality management and DAC technologies.
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