Indexed by:期刊论文

Date of Publication:2015-02-12

Journal:SEPARATION AND PURIFICATION TECHNOLOGY

Included Journals:SCIE、EI

Volume:141

Page Number:170-178

ISSN No.:1383-5866

Key Words:CO2 capture; Hydrate-based technology; Gas separation; Porous media

Abstract:Hydrate-based gas separation is considered a promising technology for H-2 purification and CO2 capture. To investigate the behaviour of this separation technology in a flowing system for industrial application, an orthogonal experiment was conducted to explore the effects of glass beads, flow rate, pressure and temperature on a mobile-phase (H-2/CO2) separation system in cooled porous media. The distribution of the pore solution was measured using magnetic resonance imaging (MRI) to analyse hydrate formation/dissociation. The experimental results demonstrated that solution movement scarcely occurred in BZ-01. The lowest H-2 concentration was 26.1 mol% for the hydrate dissociation process, whereas the highest value was 44.8 mol%. The overall H-2 concentration for hydrate dissociation decreased with an increase in pressure, and the hydrate saturation increased with pressure. Suitable parameters for gas separation were determined to be 1.0 mL min(-1) and 281.0 K in this investigation. Variance analysis indicated that porous media and temperature significantly affect the H-2 concentrations in the hydrate dissociation process, whereas only porous media significantly affect hydrate saturation. (C) 2015 Published by Elsevier B.V.