CH_4/N_2 adsorption kinetics on carbon molecular sieve
CI Hong-ying
LIMing
LU Shao-yu
LIU Xin-li
Abstract：Adsorption kinetics of CH_4/N_2 on the carbon molecular sieve(CMS) was studied. Kinetics data of pure CH_4 and N_2 adsorbed on CMS particles were determined through the volumetric principle, and the range of temperature was 253 K to 333 K. The FD model was adopted to simulate the adsorption kinetics data obtained from the CMS particles. The results show that the diffusion coefficient of N_2 is larger than CH_4 at the initial time of adsorption. Therefore N_2 is with preferentially adsorption. In addition, the breakthrough curves of the pure CH_4 and N_2 and their mixture were de-termined on the fixed adsorption bed. Based on the investigation of breakthrough curves, it demonstrates that CH_4 is first through the fixed bed. Thus CH_4 can be enriched directly at the outlet. The yield is 75.6% when the concentra-tion of CH_4 is more than 99%.
Keywords：CH_4/N_2carbon molecular sieve (CMS)kineticsbreakthrough curvediffusion coefficient
Publication Date：2010-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 316-319 )