Solid adsorbents for carbon dioxide capture: a review

Abstract

ABSTRACT With rapid urbanisation and industrialisation, the human race is experiencing a massive decline in air, water, and soil quality. The quest for proper adsorption of increasing levels of carbon dioxide is still a topic of concern globally. The numerous carbonaceous and non-carbonaceous solid adsorbents can be employed for adsorbing CO2 gas via the physisorption and chemisorption techniques. This mini-review critically discusses the most frequently used solid adsorbents, such as activated carbon, zeolites, and metal–organic frameworks. Activated carbon is widely used owing to its low cost and easy availability. However, zeolites and metal–organic frameworks show much higher adsorption capacity, thus making them promising adsorbents for carbon capture. Therefore, the ongoing and future research aims at finding cheaper routes for organic linker synthesis for economical, better, and more efficient carbon-capturing adsorbent and metal–organic frameworks that contain the potential to build this gap.