Theory and technology of air filtration: review

Abstract

The development of modern science and technology, improving the level of industrialization, increase people's awareness of environmental protection were leaded to the world's demand for filter materials to purify the air. This review presented an overview of air pollutants classification, history of fiber materials, theory of air filtration technology, and traditional air filtration (materials, characteristics, advantages, disadvantages, and standards). In addition, the paper reviewed the mechanisms of filtration, which include diffusion, interception, intermolecular interaction, straining, inertial impaction, gravitation, and electrostatic interaction of particles on the filter surface. Different studies have revealed the possibilities for the utilization of activated carbon fiber in the removal of VOC or odor from gaseous emissions in the air.

Corrosion Protection Performance of PACC and PACC-Metal Oxides Nanocomposites Electropolymerized Coating of Low Carbon Steel

“…Based on previous studies [19][20][21][22][23], the mechanism of the ACC monomer electropolymerization on the LCS electrode surface has been suggested according to cationic electropolymerization, which takes place in the stages described below [28,29]: 1. The working electrode accepts a single electron from the monomer molecule and a cationic radical is formed, as shown in steps 1 to 2 of Fig.…”

“…These compounds are selected based on their large molecular weight, functional polarity (such as -C=O, C=N), and extensive connections in aromatic rings, allowing them to adsorb on alloy surfaces [18]. There are many studies on the electropolymerization process to protect alloys from corrosion [19][20][21][22][23].…”

Thermographic Method of Activated Carbon Packing Quality Diagnostics in NPP Air Filters

“…A lot of attention is paid to the prevention of environmental pollution and, a large number of effective technologies have been developed to reduce the level of pollution, including from industrial enterprises. Thus, one of the components of any industrial enterprise is such engineering structures as ventilation systems, which ensure the necessary sanitary standards in production premises, labor protection, and compliance with the norms of emissions into the environment [3][4][5][6][7]. Particular attention is paid to ventilation systems as the main source of emissions harmful to human health and the environment, industrial waste generated in the chemical, mining, construction, and energy industries, including nuclear [3].…”