Carbon Capture Using Porous Silica Materials

As the primary greenhouse gas, CO2 emission has noticeably increased over past decades resulting in global warming and climate change. Surprisingly, anthropogenic activities have atmospheric by 50% less than 200 years, causing more frequent severe rainfall, snowstorms, flash floods, droughts, heat waves, rising sea levels recent times. Hence, reducing excess atmosphere is imperative to keep average temperature rise below 2 °C. Among many mitigation approaches, capture using porous materials considered one of most promising technologies. Porous solid such as carbons, silica, zeolites, hollow fibers, alumina been widely investigated Interestingly, silica-based recently emerged excellent candidates for technologies due their unique properties, including high surface area, pore volume, easy functionalization, thermal, mechanical stability, low cost. Therefore, this review comprehensively covers major processes pros cons, selecting a suitable sorbent, use liquid amines, highlights progress various silica materials, amine-functionalized reaction mechanisms synthesis processes. Moreover, adsorption capacities, gas selectivity, reusability, current challenges, future directions also discussed.