PRESSURE SWING ADSORPTION PROCESSES - INTRAPARTICLE DIFFUSION CONVECTION MODELS

• Type: Article in International Scientific Journal
• Date: 1993

Authors

LU, ZP (Author) Other; José Miguel Loureiro (Author) FEUP; LEVAN, MD (Author) Other; Alírio Rodrigues (Author) FEUP

Journal

Title: Industrial & Engineering Chemistry Research

Vol. 32 No. 9

Pages: 2740-2751

ISSN: 0888-5885

Publisher: American Chemical Society

Indexing

ISI Web of Knowledge - 12 Citations

ISI Web of Science

Scopus - 11 Citations

COMPENDEX

Other information

Authenticus ID: P-001-MGF

DOI: 10.1021/ie00023a042

Abstract (EN): The dynamic behavior of a three-step one-column isothermal PSA process is assessed by simulation; three models are used: equilibrium, intraparticle diffusion, and intraparticle diffusion/convection. Two process performance parameters, product enrichment and recovery of the light component, are used to measure the separation performance. The effects of several operating variables on the process performance are addressed. Higher pressure ratios (P(h)/P(l)) and higher adsorption capacities increase the process performance. The process performance is practically independent of the step rates, although it can decrease if high feed rates are used together with large feed duration times. The limiting performance of the system is found in the absence of mass-transfer resistances. Intraparticle convection, enhancing mass transfer inside particles, increases the process performance relative to intraparticle diffusion alone; the improvement is limited by the equilibrium situation.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 12