Performance of charcoals for humidity control
2002
"Kurimoto, Y. (Akita Prefectural Univ. (Japan)) | Kano, K. | Kohdzuma, Y. | Norimoto, M. | Sawabe, O. "
"Charcoals from different sizes and wood species were prepared at carbonization temperatures of 500- 900deg C for 3h to investigate their humidity control capacity. Humidity control tests were carried out in a sealed batch system at temperature levels of 15-25degC for 3-24h cycles. At the 24hour-cycle, there was no difference in the humidity control capacity of the charcoals with any carbonization temperature, size and wood species. Three milligrams of the charcoal per unit air volume (1cube cm) kept the change in relative humidity (RH) within 3%. When the cycle was shortened to 3h, the humidity control capacity of these decreased. Controlling the carbonization temperature and size of charcoal was the way to minimize the decrease in humidity control capacity. The humidity control ability of charcoal (22-30 mesh) carbonized at 600degC for 3 to 24 hour-cycle temperature changes was equivalent to 1-3/5 of that of a commercial silica gel commonly used in museums."
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