Szczegóły publikacji
Opis bibliograficzny
The isokinetic effect as related to the activation energy for the gases diffusion in coal at ambient temperatures. Pt. 1, Fick's diffusion parameter estimated from kinetic curves / A. Mianowski, Aleksandra MARECKA // Journal of Thermal Analysis and Calorimetry ; ISSN 1388-6150. — Tytuł poprz.: Journal of Thermal Analysis ; ISSN: 0368-4466. — 2009 — vol. 95 iss. 1, s. 285–292. — Bibliogr. s. 291–292. — Publikacja dostępna online od: 2008-10-12
Autorzy (2)
- Mianowski Andrzej
- AGHMarecka Aleksandra
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 72551 |
|---|---|
| Data dodania do BaDAP | 2013-03-21 |
| Tekst źródłowy | URL |
| DOI | 10.1007/s10973-008-9058-3 |
| Rok publikacji | 2009 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Journal of Thermal Analysis and Calorimetry |
Abstract
The present paper contains theoretical analysis and a thorough discussion of the applicability of Fick's approach to modelling CO(2) and CH(4) diffusion in heterogeneous coal, especially with regard to the estimation of a single diffusion coefficient from the dependence defined by a number series. The computations were performed for high rank coal depending on the grain size of coal samples and within a narrow range of temperature - 293 and 303 K. The results of the model's application to the experimental data show that the method of estimation of the diffusion coefficient is very important. Our results also show that the diffusion coefficient changes are closely related with the one-parameter analysis of coal grain size distribution. It was shown that for the investigated grain size distribution the diffusion coefficient as expressed by Fick's law may only be determined as a value which is directly proportional to the diffusion parameter. Hence, the estimation of D/r (2) is recommended.