TY  - JOUR
N2  - The potential of a nano-porous membrane to perform non-chemical separation of a gas mixture has been explored theoretically. Separation of hydrogen sulfide from its mixture with methane by capillary condensation has been selected as the model case. Because of its much lower condensation pressure compared to methane, hydrogen sulfide preferentially condenses in the fine pores and get transported by Poiseuille flow. Permeation rate up to 600 gmol/m2 s bar has been achieved at a temperature lower than the critical temperature of the permeating species and higher than the critical temperature of the non-permeating species. Since methane has a much lower critical temperature than hydrogen sulfide, it gets physically dissolved in the condensed phase of hydrogen sulfide. An equation of state (EOS) approach ha s been adopted to calculate the fugacity of methane in the gas as well as in the condensed phase-in order to estimate its solubility. Computation of permeation flux of the condensed phase as well as of the separation factor of hydrogen sulfide has been performed over a wide range of temperature, pressure and gas composition. The separation factor which is expectedly a function of these variables, ranged from 700 to 100. The separation technique is expected to have an enhanced attraction since it is clean and does not require a solvent as in the conventional separation of acid gases. © 2007 Elsevier B.V. All rights reserved.
IS  - 12
KW  - Condensation; Electric network analysis; Hydrogen; Hydrogen sulfide; Isomers; Methane; Precipitation (chemical); Separation; Sulfur determination
KW  -  Capillary condensation; Hydrogen sulfide separation; Membrane gas separation; Nano-porous membrane; Natural gas
KW  -  Gas permeable membranes
ID  - scholars429
Y1  - 2008///
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-53549131977&doi=10.1016%2fj.cep.2007.11.015&partnerID=40&md5=5107d8ccd60e0af88b21a630bc53805a
A1  - Ahmad, F.
A1  - Mukhtar, H.
A1  - Man, Z.
A1  - Dutta, Binay.K.
JF  - Chemical Engineering and Processing: Process Intensification
VL  - 47
AV  - none
N1  - cited By 7
TI  - A theoretical analysis of non-chemical separation of hydrogen sulfide from methane by nano-porous membranes using capillary condensation
SP  - 2203
SN  - 02552701
EP  - 2208
ER  -