Abstract
This work documents the relationship between geopolymers, which are materials with a quasi-monomodal pore network, and their gaseous diffusivity capacities. Using a monomodal material allows studying a specific pore size contribution to gaseous diffusion. The pore network is characterized by mercury porosimetry. These experimental results are used as data in a model named MOHYCAN. The modeling work consists of creating a virtual pore network. Then, water layers are deposited in this network to simulate variable water saturation levels. Finally, hydrogen is transported through the virtual network using a combination of ordinary diffusion and Knudsen diffusion. MOHYCAN calculates the hydrogen diffusion coefficient for water saturation degree from 0 % to 100 %. The impacts of the pore network arrangement or the pore network discretization are also studied.
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Boher, C., Lorente, S., Frizon, F., Bart, F. (2013). Simulation of Gas Hydrogen Diffusion Through Partially Water Saturated Monomodal Materials. In: Bart, F., Cau-di-Coumes, C., Frizon, F., Lorente, S. (eds) Cement-Based Materials for Nuclear Waste Storage. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-3445-0_13
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DOI: https://doi.org/10.1007/978-1-4614-3445-0_13
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