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Issue 37, 2016
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Highly selective adsorption and separation of dichloromethane/trichloromethane on a copper-based metal–organic framework

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Abstract

A copper-based metal–organic framework (MOF), also known as HKUST-1, was successfully synthesized, characterized, and evaluated for selective adsorption and separation of dichloromethane (DCM) and trichloromethane (TCM). The adsorption equilibria and kinetics of DCM and TCM were systematically investigated on the HKUST-1. Results showed that HKUST-1 has a high adsorption capacity for DCM (13.12 mmol g−1) and TCM (8.53 mmol g−1) at 298 K, respectively. From the kinetics results, the diffusion coefficients of DCM and TCM in HKUST-1 were estimated to be 3.73 × 10−9 cm2 s−1 and 0.44 × 10−9 cm2 s−1 at 318 K. In addition, their binary adsorption selectivity and diffusivity selectivity were predicted via the ideal adsorbed solution theory (IAST) method. The high adsorption selectivity (3.04) and diffusivity selectivity (8.93) at 318 K and 2.8 kPa indicated that HKUST-1 is a great candidate for selective adsorption and separation of DCM and TCM. Based on these results, the mechanism of adsorption and separation process has been discussed.

Graphical abstract: Highly selective adsorption and separation of dichloromethane/trichloromethane on a copper-based metal–organic framework

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Article information


Submitted
12 Nov 2015
Accepted
18 Mar 2016
First published
21 Mar 2016

RSC Adv., 2016,6, 31214-31224
Article type
Paper
Author version available

Highly selective adsorption and separation of dichloromethane/trichloromethane on a copper-based metal–organic framework

F. Tian, X. Zhang and Y. Chen, RSC Adv., 2016, 6, 31214
DOI: 10.1039/C5RA23888A

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