Bio-based adsorbents for CO2 separation

The use of bio-waste for the production of bio-based adsorbents not only has intrinsic benefits to the environment but is also a route for its valorization. Based on the concept of a circular economy, this book chapter aims to provide an overview of present trends and future potential in the conversion of bio-waste into bio-based adsorbents with particular emphasis on its application to carbon dioxide capture. Bio-based adsorbents have recently gained considerable attention as benign and cost-effective materials for CO2 capture applications. These adsorbents can be produced from cheap and widely available biomass feedstocks and bio-wastes from different industries (e.g., dairy manure, forestry, and agricultural). As a result, a carbon-rich material of hydrophobic nature is obtained, which is activated to gain high porosity development, and it requires mild regeneration conditions. However, large-scale deployment of bio-based adsorption processes remains challenging.