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- Hernandez, M., et al.
(författare)
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Modeling of VOC mass transfer in two-liquid phase stirred tank, biotrickling filter and airlift reactors
- 2011
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Ingår i: Chemical Engineering Journal. - : Elsevier BV. - 1385-8947. ; 172:2-3, s. 961-969
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Tidskriftsartikel (refereegranskat)abstract
- A modeling framework based on general mass balances and transfer equations was here developed in order to compare the hexane mass transfer performance of two-liquid phase stirred tank reactor (SIR), airlift (ALR) and biotrickling filter (BTF) using silicone oil as model non-aqueous phase under abiotic conditions. This modeling approach resulted in an isomorphous expression for all configurations consisting of a parameter beta*(s) (characterizing the maximum fraction of VOC transferable from the gas to the aqueous phase) and the gradient established between the gas and the aqueous phase. The models were validated against experimental data (at empty bed residence times, EBRT, of 120, 60 and 40 s) exhibiting an overall goodness of fit of 0.98, 0.98 and 0.70 for the two-liquid phase STR, BTF and ALR, respectively. The two-liquid phase BTF exhibited the maximum value of beta*(s) (0.87-0.58), followed by the STR (0.77-0.49) and the ALR (0.23-0.19). Finally, a sensitivity analysis conducted in the two-liquid phase BTF showed that was more sensitive to changes in recirculating liquid flow rate than in the EBRT, confirming that the liquid flow rate is a key operational variable in BTF systems.
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| 3. |
- Murugesan, Murali, 1979, et al.
(författare)
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Carbon fiber solder matrix composite for thermal management of high power electronics
- 2014
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Ingår i: Journal of Materials Chemistry. - : Royal Society of Chemistry (RSC). - 1364-5501 .- 0959-9428 .- 2050-7534 .- 2050-7526. ; 2:35, s. 7184-7187
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Tidskriftsartikel (refereegranskat)abstract
- A carbon fiber based tin–silver–copper alloy matrix composite (CF-TIM) was developed via electrospinning of a mesophase pitch with polyimide and carbonization at 1000 °C, followed by sputter coating with titanium and gold, and alloy infiltration. The carbonized fibers, in film form, showed a thermal conductivity of [similar]4 W m−1 K−1 and the CF-TIM showed an anisotropic thermal conductivity of 41 ± 2 W m−1 K−1 in-plane and 20 ± 3 W m−1 K−1 through-plane. The thermal contact resistance of the CF-TIM was estimated to be below 1 K mm2 W−1. The CF-TIM showed no reduction in effective through-plane thermal conductivity after 1000 temperature cycles, which indicates the potential use of CF-TIM in thermal management applications.
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