Journal Article

FZJ-2022-04747

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Application of a tailorable carbon molecular sieve to evaluate concepts for the molecular dimensions of gases

Kretzschmar, A. (Corresponding author)FZJ*RWTH* ; Selmert, V.FZJ*RWTH* ; Kungl, H.FZJ* ; Tempel, H.FZJ* ; Eichel, R.-A.FZJ*RWTH*

2022
Elsevier Amsterdam [u.a.]

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Please use a persistent id in citations: http://hdl.handle.net/2128/32646  doi:10.1016/j.micromeso.2022.112156

Abstract: Molecular sieves have attracted considerable interest for gas separation applications due to their ability todiscriminate substances by their molecule’s size. To predict if a molecular sieve is suitable for a specific separationproblem an accurate measure of the molecular sizes is called for. Furthermore, a high precision in estimationsfor molecular dimensions is needed for the characterization of materials using molecular probes. In thiswork, different popular concepts to estimate the size of a gas molecule, specifically Breck’s kinetic diameter, thecritical diameter and molecular dimensions by Webster (MIN-1) are discussed. These concepts are evaluatedusing a tailorable carbon molecular sieve. It is concluded, that the widely used kinetic diameter has somedrawbacks to determine the accessibility of pores. Finally, recommendations for alternatives from existingliterature are presented.

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Contributing Institute(s):

1. Grundlagen der Elektrochemie (IEK-9)

Research Program(s):

1. 1232 - Power-based Fuels and Chemicals (POF4-123) (POF4-123)
2. EXC 2186:  The Fuel Science Center – Adaptive Conversion Systems for Renewable Energy and Carbon Sources (390919832) (390919832)

Appears in the scientific report 2022

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Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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