Enhancing comprehension of water vapor on adsorption performance of VOC on porous carbon materials and its application challenge

Abstract

● Water vapor’s effect on VOC adsorption in various porous carbons was investigated.

● How adsorbent and adsorbate properties affect moist VOC adsorption was studied.

● The challenges of using carbon materials for moist VOC adsorption were addressed.

● Theoretical and technical guidance on efficiently purifying moist VOC gases is given.

Volatile organic compounds (VOC) have been proven to cause considerable harm to both the ecological environment and human health. Anthropogenic VOC emissions are primarily generated by the industrial sector. The utilization of porous carbon as an adsorbent has emerged as an effective method for the efficient removal of VOC from industrial sources. However, during the actual production processes, VOC exhaust gases are often mixed with water vapor, which poses challenges for adsorption purification. This review provides a comprehensive overview of the remarkable advancements in various carbon materials in terms of their ability to adsorb both VOC and water vapor. Additionally, it systematically summarizes the influence of surface groups on adsorbents and the molecular properties of VOC on their adsorption by carbon materials. Furthermore, this review introduces the mechanism underlying adsorption-adsorbent interactions and discusses the construction of models for adsorbing water vapor and VOC. The challenges associated with the application of carbon materials for VOC adsorption in humid environments are also addressed. This review aims to offer theoretical and technical guidance for the effective purification of moist VOC waste gases emitted from industrial sources, thereby achieving precise control of VOC emissions.

Graphical abstract

Keywords

Adsorption / Water vapor / Carbon-based adsorbents / Surface functional groups / VOC properties

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