Abstract
The lithium silicate nanorods derived by a microwave sol gel process display extremely fast CO2 absorption rates as well as remarkable durability for prolonged application.
Highlights
Global warming and its effect on climate destabilization have grown into an alarming environmental concern in recent times
We demonstrate the development of an efficient CO2 absorbent material, made of Li4SiO4 nanorods, with ultrafast sorption kinetics as well as remarkable durability
The TEM images show that the particles have a nanorod morphology and are entirely different from the powders synthesized by conventional processing techniques.[29,30]
Summary
Removal of CO2 at high temperatures is an effective option to reduce its emissions to the atmosphere.[7,8,9] In several hightemperature chemical and petrochemical processes, CO2 is a major product and its removal at the temperature and pressure of the reaction offers a less energy intensive method of separation culminating in smaller carbon footprints. We believe that the enhanced kinetics for CO2 absorption arise from the very small thickness (20 to 30 nm) of rod-shaped Li4SiO4 particles Irrespective of their nano-size, the large aspect ratio of the particles provided them with better stability against aggregation at high working temperatures thereby providing improved durability for a large number of absorption/desorption cycles. The compositional control of these morphologically tuned materials helped to realize novel eutectic compositions containing Na and K as new generation CO2 absorbents with exceptionally high CO2 absorption rates even at low and moderate temperatures (
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