Estimating the Service Life of Activated Carbon Filters for Air Purification

Abstract

It is very important to be able to predict the breakthrough time of gas mask filters under real life circumstances. This article describes the use of a very simple predictive equation, the Wheeler-Jonas equation, that yields excellent predictions but only within a very restrictive set of boundary conditions. In order to make this model work in a more realistic environment, it has been gradually adapted to take into account a number of parameters related to this environment: a non-constant inlet concentration, a breather flow, new physical forms of activated carbon, the relative humidity and temperature of the ambient air, chemisorbed gases and mixtures of organic vapours. As (nearly) all of these parameters can be calculated independently of each other, based on data that are either readily available or that can be measured, their influence on the complexity of the model stays low. This makes this combined model both easy to use and powerful in predicting breakthrough times of gas mask filters under real-life conditions.

Pitch-based carbon fibers: preparation and applications

“…Carbon nanomaterials (CNM) like as: carbon fibers (CF), activated carbon (AC), nanotubes (CNTs), graphene (Gr), carbon quantum dots (CQDs), in view of their excellent physicochemical, sorption, mechanical and electrical properties, find wide application in various areas of human life [1][2][3][4][5]. So, for example, they are used in water purification [6][7][8][9][10], various energy-intensive systems [11,12], catalyst carriers [13][14][15], sensors [15][16][17][18][19], targeted delivery of drugs [20][21][22][23] and etc.…”

Factors Influencing the Kinetics of Water Vapour Adsorption on Activated Carbons

“…Under real operating conditions, the water molecules from the surrounding atmosphere tend to infiltrate and occupy the adsorption sites reserved for other target molecules (e.g. organic vapours) or to influence the kinetics of the water vapour adsorption, thus compromising the performance of the carbon [1][2][3][4]. In this regard, while the mechanisms of water adsorption in carbon pores have been the subject of extensive research in the last years [5 and references therein], scarce works have been devoted to the study of the kinetics of adsorption [6][7][8].…”