Student or educator? Sign up with your school email and get 6 months of Pro free.
Cited by 1,662

The DOI matches its Crossref record.

Basis of Permeability/Selectivity Tradeoff Relations in Polymeric Gas Separation Membranes

Freeman, Benny D.·1999·Macromolecules

Abstract

Gas separation properties of polymer membrane materials follow distinct tradeoff relations: more permeable polymers are generally less selective and vice versa. Robeson 1 identified the best combinations of permeability and selectivity for important binary gas pairs (O 2 /N 2, CO 2 /CH 4, H 2 /N 2, etc.) and represented these permeability/selectivity combinations empirically as α A/B = β A/B, where P A and P B are the permeability coefficients of the more permeable and less permeable gases, respectively, α A/B is selectivity (= P A / P B ), and λ A/B and β A/B are empirical parameters. This report provides a fundamental theory for this observation. In the theory, λ A/B depends only on gas size. β A/B depends on λ A/B, gas condensability, and one adjustable parameter.

Overview

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1021/ma9814548

Cites

Statistics

Verification

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Citations

Cited by

Metadata

Authors
Freeman, B. D.
Venue
Macromolecules
Published
1999-01-01
Volume
32
Issue
2
Pages
375-380
ISSN
  • 0024-9297 (ISSN-L)
  • 1520-5835
OpenAlex
W2017236889
Cited by
1,662
References
0
FWCI
38.95
Type
journal article
Language
en
Open access
closed

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review

Data sources

Bibliographic data: Semantic Scholar, OpenAlex, Crossref.

Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.