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- W2885514183 abstract "A mass transport model for the supercritical drying of gels to aerogels in different sizes (monoliths or particles) and shapes (cylinder, sphere) was developed and evaluated. Physico-chemical data for the system CO2/ethanol from literature at relevant process conditions were analyzed for a precise description of relevant physical properties. In situ measurements of the supercritical drying kinetics of gel monoliths using Raman spectroscopy were used to fit the tortuosity factor of the gel network. Apart from the fitted tortuosity factor the presented model is predictive. The model was analyzed in detail for the case of spherical gel particles. Theoretical minimal drying times were found to range in seconds for microparticles. The mass transfer step limiting the overall drying kinetics was analyzed using the dimensionless Biot number. The transition Biot number can be used for rational selection of the drying conditions (pressure, temperature, mass flow) to achieve a fast drying with low CO2 consumption." @default.
- W2885514183 created "2018-08-22" @default.
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- W2885514183 date "2018-10-01" @default.
- W2885514183 modified "2023-10-14" @default.
- W2885514183 title "Model development for sc-drying kinetics of aerogels: Part 1. Monoliths and single particles" @default.
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- W2885514183 doi "https://doi.org/10.1016/j.supflu.2018.07.002" @default.
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