Abstract:
Humidity causes a lot of problems to industrial products, such as pharmaceutical and
food products. It is necessary to control the quality of the products by limiting the
humidity level. The objective of this research is to fabricate the adsorbent using chicken
eggshells, duck eggshells and seashells. The raw materials obtained from these products
are calcium carbonate (CaCO3) . To use them as humidity adsorbent, they must be
heated until CaCO3 transformed into calcium oxide (CaO). In this work the prepared
samples were ground and sieved to obtain the samples with particle size of smaller than
250 and large than 500 Um, Then, they were heated at different temperatures from 200
to 1300 c for 4 hours. It was found that CaC03 completely transformed into CaO at
1300 c. The CaO samples were used for humidity adsorption test via Fixed bed
column. It was found that the chicken eggshells showed highest capacity. Furthermore,
for each adsorbent sample, the particle size of smaller than 250 Um adsorbed humidity
faster than that of large than 500 Um.