Modeling the influence of physico-chemical properties of volatile organic compounds on activated carbon adsorption capacity

A systematic investigation of the overall rate coefficient in the Wheeler–Jonas equation for adsorption on dry activated carbons

“…A decrease in the ionization potential or an increase in the HOMO energy of the adsorbate seems to increase the rate constant. A similar pattern was observed when modelling the activated carbon capacity in the low relative pressure range (P/P sat < 0.05) [10], conditions close to the present breakthrough experiments. These findings suggest that molecular interactions at the carbon surface are involved in the rate determining step of adsorption to activated carbons, or that k v is contaminated by influences from W e due to imperfect fitting to the WJ-equation.…”

“…In the previous work involving measurement of the adsorption isotherm on Norit R1 Extra [9,10], eight representative VOCs were selected using a fractional factorial design (2 5-2 ) based on five principal components (PCs). In order to include more classes of organic compounds in the training set of the present work, four extra VOCs were added.…”

“…Another paper [10], investigated the influence of various adsorbate properties on the adsorption capacity at different stages of the adsorption process. This paper will focus on an improved prediction of the second unknown parameter in Eq.…”

Surface modification of coconut shell based activated carbon for the improvement of hydrophobic VOC removal

“…Due to their developed high surface area, porous structure, and high degree of surface reactivity, activated carbons have been the most widely used adsorbent in the purification of organic compounds with intermediate molecular weights (typically about 45-130) from gases and vapors. Previous research has already investigated adsorption of monocyclic aromatic hydrocarbons, such as toluene, benzene, and xylene [1][2][3][4][5][6], 1,1-dichloroethane and chloroform [7] and other organic materials [8][9][10][11][12][13][14].…”

Adsorption behaviors of volatile organic compounds (VOCs) on porous clay heterostructures (PCH)

“…In order to discriminate the most significant variables of VOCs, a multiple linear regression (MLR) approach was tested [33][34][35]. MLR approach was used for carrying out the quantitative analysis using MINITAB software which attempted to establish quantitative correlation between adsorption capacity on PCH and physical/chemical properties of VOCs (Table 1).…”