Enhanced adsorption and regeneration of adsorbents for effective air pollution control and gas separation and purification

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Adsorption with regeneration is a desirable process for controlling the emissions of organic vapors and separation and purification of gas streams because it allows for the recycle and reuse of the adsorbate hence contributing to sustainable industrial development. Adsorbents are typically regenerated by heating or applying vacuum. Steam and hot inert gas have been widely used for the regeneration of adsorbents. The regeneration of adsorbents has become an emerging concern because of its long duration and high energy requirements. More recently microwave and resistive heating have emerged as more effective regeneration techniques because of their faster rate and higher efficiency compared to regeneration with steam or inert gas. Microwave regeneration has also potential to minimize or eliminate irreversible adsorption and heel buildup. Tailoring the electric (i.e. resistivity) and dielectric (i.e. loss factor) properties of the adsorbent can allow for more effective and energy efficient regeneration of the adsorbent, and can indicate the degree of saturation or regeneration of the adsorbent.