Abstract
Propylene/propane mixture separation properties of high quality carbon molecular sieve (CMS) membranes prepared on mesoporous γ-alumina supports were studied at different feed pressures (up to 100 psia), feed compositions, and permeation temperatures. The membrane exhibits a mixture propylene/propane selectivity of above 30 under the studied conditions, with no plasticization effect observed at feed pressures up to 100 psia (∼700 kPa). Temperature dependences of the permeance and selectivity suggest a diffusion dominated mechanism for the permeation and separation of propylene/propane through the CMS membrane. The propylene/propane separation characteristics tend to stabilize after a decline in gas permeance and an increase in propylene/propane selectivity while on stream of propylene/propane mixture for 10 days. The initial changes in separation properties of the CMS membrane are due to the reduction in the effective pore size caused by oxygen chemisorption and physical aging of the pore structure. CMS membranes can be preaged under proper conditions to stabilize the structure and separation performance for practical separation application.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 9824-9831 |
| Number of pages | 8 |
| Journal | Industrial and Engineering Chemistry Research |
| Volume | 54 |
| Issue number | 40 |
| DOIs | |
| State | Published - Oct 14 2015 |
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ASJC Scopus subject areas
- Chemical Engineering(all)
- Chemistry(all)
- Industrial and Manufacturing Engineering
Cite this
Propylene/Propane Mixture Separation Characteristics and Stability of Carbon Molecular Sieve Membranes. / Ma, Xiaoli; Williams, Suzanne; Wei, Xiaotong; Kniep, Jay; Lin, Jerry.
In: Industrial and Engineering Chemistry Research, Vol. 54, No. 40, 14.10.2015, p. 9824-9831.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Propylene/Propane Mixture Separation Characteristics and Stability of Carbon Molecular Sieve Membranes
AU - Ma, Xiaoli
AU - Williams, Suzanne
AU - Wei, Xiaotong
AU - Kniep, Jay
AU - Lin, Jerry
PY - 2015/10/14
Y1 - 2015/10/14
N2 - Propylene/propane mixture separation properties of high quality carbon molecular sieve (CMS) membranes prepared on mesoporous γ-alumina supports were studied at different feed pressures (up to 100 psia), feed compositions, and permeation temperatures. The membrane exhibits a mixture propylene/propane selectivity of above 30 under the studied conditions, with no plasticization effect observed at feed pressures up to 100 psia (∼700 kPa). Temperature dependences of the permeance and selectivity suggest a diffusion dominated mechanism for the permeation and separation of propylene/propane through the CMS membrane. The propylene/propane separation characteristics tend to stabilize after a decline in gas permeance and an increase in propylene/propane selectivity while on stream of propylene/propane mixture for 10 days. The initial changes in separation properties of the CMS membrane are due to the reduction in the effective pore size caused by oxygen chemisorption and physical aging of the pore structure. CMS membranes can be preaged under proper conditions to stabilize the structure and separation performance for practical separation application.
AB - Propylene/propane mixture separation properties of high quality carbon molecular sieve (CMS) membranes prepared on mesoporous γ-alumina supports were studied at different feed pressures (up to 100 psia), feed compositions, and permeation temperatures. The membrane exhibits a mixture propylene/propane selectivity of above 30 under the studied conditions, with no plasticization effect observed at feed pressures up to 100 psia (∼700 kPa). Temperature dependences of the permeance and selectivity suggest a diffusion dominated mechanism for the permeation and separation of propylene/propane through the CMS membrane. The propylene/propane separation characteristics tend to stabilize after a decline in gas permeance and an increase in propylene/propane selectivity while on stream of propylene/propane mixture for 10 days. The initial changes in separation properties of the CMS membrane are due to the reduction in the effective pore size caused by oxygen chemisorption and physical aging of the pore structure. CMS membranes can be preaged under proper conditions to stabilize the structure and separation performance for practical separation application.
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U2 - 10.1021/acs.iecr.5b02721
DO - 10.1021/acs.iecr.5b02721
M3 - Article
VL - 54
SP - 9824
EP - 9831
JO - Industrial & Engineering Chemistry Product Research and Development
JF - Industrial & Engineering Chemistry Product Research and Development
SN - 0019-7890
IS - 40
ER -