|
|
|
|
| LEADER |
01000caa a22002652 4500 |
| 001 |
NLM21351768X |
| 003 |
DE-627 |
| 005 |
20250213105734.0 |
| 007 |
cr uuu---uuuuu |
| 008 |
231224s2012 xx |||||o 00| ||eng c |
| 024 |
7 |
|
|a 10.1021/la2033737
|2 doi
|
| 028 |
5 |
2 |
|a pubmed25n0711.xml
|
| 035 |
|
|
|a (DE-627)NLM21351768X
|
| 035 |
|
|
|a (NLM)22133053
|
| 040 |
|
|
|a DE-627
|b ger
|c DE-627
|e rakwb
|
| 041 |
|
|
|a eng
|
| 100 |
1 |
|
|a Dursch, T J
|e verfasserin
|4 aut
|
| 245 |
1 |
0 |
|a Isothermal ice crystallization kinetics in the gas-diffusion layer of a proton-exchange-membrane fuel cell
|
| 264 |
|
1 |
|c 2012
|
| 336 |
|
|
|a Text
|b txt
|2 rdacontent
|
| 337 |
|
|
|a ƒaComputermedien
|b c
|2 rdamedia
|
| 338 |
|
|
|a ƒa Online-Ressource
|b cr
|2 rdacarrier
|
| 500 |
|
|
|a Date Completed 01.05.2012
|
| 500 |
|
|
|a Date Revised 17.01.2012
|
| 500 |
|
|
|a published: Print-Electronic
|
| 500 |
|
|
|a Citation Status PubMed-not-MEDLINE
|
| 520 |
|
|
|a © 2011 American Chemical Society
|
| 520 |
|
|
|a Nucleation and growth of ice in the fibrous gas-diffusion layer (GDL) of a proton-exchange membrane fuel cell (PEMFC) are investigated using isothermal differential scanning calorimetry (DSC). Isothermal crystallization rates and pseudo-steady-state nucleation rates are obtained as a function of subcooling from heat-flow and induction-time measurements. Kinetics of ice nucleation and growth are studied at two polytetrafluoroethylene (PTFE) loadings (0 and 10 wt %) in a commercial GDL for temperatures between 240 and 273 K. A nonlinear ice-crystallization rate expression is developed using Johnson-Mehl-Avrami-Kolmogorov (JMAK) theory, in which the heat-transfer-limited growth rate is determined from the moving-boundary Stefan problem. Induction times follow a Poisson distribution and increase upon addition of PTFE, indicating that nucleation occurs more slowly on a hydrophobic fiber than on a hydrophilic fiber. The determined nucleation rates and induction times follow expected trends from classical nucleation theory. A validated rate expression is now available for predicting ice-crystallization kinetics in GDLs
|
| 650 |
|
4 |
|a Journal Article
|
| 700 |
1 |
|
|a Ciontea, M A
|e verfasserin
|4 aut
|
| 700 |
1 |
|
|a Radke, C J
|e verfasserin
|4 aut
|
| 700 |
1 |
|
|a Weber, A Z
|e verfasserin
|4 aut
|
| 773 |
0 |
8 |
|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1985
|g 28(2012), 2 vom: 17. Jan., Seite 1222-34
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
|
| 773 |
1 |
8 |
|g volume:28
|g year:2012
|g number:2
|g day:17
|g month:01
|g pages:1222-34
|
| 856 |
4 |
0 |
|u http://dx.doi.org/10.1021/la2033737
|3 Volltext
|
| 912 |
|
|
|a GBV_USEFLAG_A
|
| 912 |
|
|
|a SYSFLAG_A
|
| 912 |
|
|
|a GBV_NLM
|
| 912 |
|
|
|a GBV_ILN_22
|
| 912 |
|
|
|a GBV_ILN_350
|
| 912 |
|
|
|a GBV_ILN_721
|
| 951 |
|
|
|a AR
|
| 952 |
|
|
|d 28
|j 2012
|e 2
|b 17
|c 01
|h 1222-34
|