Adsorption of Dichloromethane on Activated Carbon

Abstract

Adsorption is an economical option for the removal of volatile organic compounds (VOCs) from effluent streams of various industries. Its feasibility depends on the equilibrium and kinetics of the adsorption process. A conventional apparatus for the measurement of adsorption equilibria and kinetics needs dedicated equipment which may not be readily available in all laboratories. To overcome this limitation, in this work adsorption equilibrium of a VOC, namely, dichloromethane, was measured on activated carbon by a flow-through gravimetric technique using a thermogravimetric analyzer (TGA, an instrument readily available in most laboratories). Moreover, in a flow-through measurement technique the concentration of the VOC in the gas phase can be accurately controlled. The measurements were performed at three different temperatures, namely, (303.15, 318.15, and 353.15) K. The results were comparable to already available data for the adsorption of dicholoromethane on activated carbon. A virial form of isotherm best describes the isotherm behavior. The limiting enthalpy of adsorption was around −41 kJ·mol−1.

A Trinuclear Cobalt–Organic Framework: Solvatochromic Sensor towards CH2Cl2, and its Derivative as an Anode of Lithium‐Ion Batteries with High Performance

“…CH 2 Cl 2 as a solvent has been commonly used in paint remover, industrial degreasing, foam production, and so on [17] . This highly volatile solvent even at room temperature has been reported as a cause of chronic toxicity, mutagenicity, and carcinogenicity for living organisms [18] . The triazine chromophores and microporous channels displayed by compound 1 are expected to facilitate the sensing of small molecules [5c] .…”

Adsorptive Water Removal from Dichloromethane and Vapor-Phase Regeneration of a Molecular Sieve 3A Packed Bed

“…From the agreement of the experimental and literature adsorption isotherm data, it can be concluded that DCM does not affect the adsorption of water on the 3A molecular sieve. The DCM molecule (kinetic diameter = 3.3 Å; 33 Lennard-Jones molecular diameter = 4.7 Å 34 ) is too large to enter the 3 Å micropores of the zeolite. These results are in accordance with the findings of adsorptive drying of higher alcohols (>C4) and esters.…”

Adsorption Isotherms of Propan-2-ol, Methylbenzene, and Tetrachloromethane on Selected Activated Carbons

“…Characteristic energy of adsorption can be expressed as E = β E 0 , where E 0 is the characteristic energy of adsorption for the standard substance, and β is the affinity coefficient. , The parameters of selected equilibrium models were obtained using Levenberg–Marquardt nonlinear regression algorithm.…”

“…The current state of the art does not allow the theoretical prediction of thesingle-component adsorption equilibrium for any adsorbent . Therefore, for each particular adsorbate–adsorbent pair, it is necessary to measure adequate data. − In the subject literature, there is a large amount of experimental data concerning the adsorption equilibrium of various pairs of adsorbate–adsorbent. However, the adsorption capacities of a particular component on the given adsorbent bed (e.g., activated carbons) may vary significantly according to adsorbent preparation method.…”