Ambient and sub-ambient temperature direct air CO₂ capture (DAC) by novel supported in situ polymerized amines

Abstract

With the dramatic increase in CO2 emissions over the last few decades and the subsequent rise in global temperatures leading to climate change, substantial efforts have been directed towards the...

Amine Sorbents for Sustainable Direct Air Capture: Long-Term Stability and Extended Aging Study

“…Furthermore, the use of PEI with higher molecular weights can result in diffusion limitations and less CO 2 uptakes. 58 The cation ring-opening polymerization (CROP) 17,59 of EtOX to obtain poly(2-ethyl-2-oxazoline) was conducted by mixing 10.0 g of the monomer (EtOX) with 1.0 g of the dried functionalized support and 20.0 g of benzonitrile at room temperature under nitrogen. Subsequently, the temperature was elevated to 90 °C and maintained for 48 h or until the material solidified.…”

Chemical Looping Combustion over Yolk–Shell-Type Alumina-Based Oxygen Carrier: Catalytic Structure and Process Activity

“…7−12 As the concentration of CO 2 increases, it traps more heat in the atmosphere, leading to rising global temperatures and a range of associated effects such as more intense and frequent extreme weather events, rising sea levels, and alterations in patterns of precipitation. 13,14 To address this issue, there are ongoing efforts to develop new technologies and approaches to capture and store carbon dioxide from the atmosphere, which could help to slow or even reverse the rise in CO 2 concentration over time. 15,16 For instance, precombustion, postcombustion, and oxy-fuel are three different technologies used in carbon capture and storage (CCS) to decrease carbon dioxide emissions from industrial processes and power plants.…”

“…The rise in atmospheric carbon dioxide levels is a significant concern, as it is one of the primary drivers of climate change. − This increment is mainly due to human actions, including deforestation, the combustion of fossil fuels, and other industrial and agricultural practices. − As the concentration of CO 2 increases, it traps more heat in the atmosphere, leading to rising global temperatures and a range of associated effects such as more intense and frequent extreme weather events, rising sea levels, and alterations in patterns of precipitation. , …”