Highly selective adsorption and separation of dichloromethane/trichloromethane on a copper-based metal–organic framework. Issue 37 (29th March 2016)

• Record Type: Journal Article
• Authors: Tian, Fengming; Zhang, Xinghua; Chen, Yunlin
• Is Part Of: RSC advances. Volume 6:Issue 37(2016)
• Page Start: 31214
• Page End: 31224
• Publication Date: 2016-03-29
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra23888a
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : CuBTC (HKUST-1) has been proven to be a great candidate for highly selective adsorption and separation of dichloromethane and trichloromethane. 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 cm 2 s −1 and 0.44 × 10 −9 cm 2 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.