Adsorption of Pure and Binary CO2, CH4, and N-2 Gas Components on Activated Carbon Beads

• Type: Article in International Scientific Journal
• Date: 2015

Authors

Yi-Jiang Wu (Author) Other; Ying Yang (Author) Other; Xiang-Ming Kong (Author) Other; Ping Li (Author) Other; Jian-Guo Yu (Author) Other; Ana M. Ribeiro (Author) FEUP; Alírio E. Rodrigues (Author) FEUP

Journal

Title: Journal of Chemical & Engineering Data

Vol. 60 No. 9

Pages: 2684-2693

ISSN: 0021-9568

Publisher: American Chemical Society

Indexing

ISI Web of Knowledge - 31 Citations

Scopus - 55 Citations

Associated Projects

LSRE-LCM - Laboratório de Processos de Separação e Reação - Laboratório de Catálise e Materiais

Other information

Authenticus ID: P-00G-MDK

DOI: 10.1021/acs.jced.5b00321

Abstract (EN): The adsorption equilibriums of CO2 CH4, and N-2 pure gases on pitch-based activated carbon beads have been studied using a magnetic suspension microbalance at (293, 303, 333, and 363) K within a pressure range of 0 kPa to 4000 kPa. It is found that experimental adsorption capacities can be successfully described with both the Sips and Multisite Langmuir (MSL) isotherm models. Afterward, binary competitive adsorption breakthrough experiments (CO2/CH4 and CH4/N-2) at 303 K and adsorption isotherms of gas mixtures under different conditions have been measured. Theoretical calculations from Sips model-based ideal adsorbed solution theory are found to have better agreement with experimental data of competitive binary adsorption than that from MSL model. Promising adsorption selectivity (5.5) between CH4 and N-2 is obtained at 303 K as the pressure of a binary gas mixture is 100 kPa with y(CH4) = 0.5 in the feed. Therefore, the activated carbon beads reported in this study can be considered as a promising adsorbent for CH4 enrichment from coalbed methane (CH4/N-2) gas mixture.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10