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Drying Behavior Essay

1481 Words6 Pages

Analysis of the Drying Behavior of Different Solids
Leia Angelie Z. Baccay1, Brigette Elizabeth L. Fernandez1, Emmanuel L. Hipe1, Kim Anne Marie M. Taroy1
1 University of the Philippines Diliman, Quezon City

Abstract. Drying is one of the most utilized unit operations in different industries. This experiment was aimed at studying the drying behavior of sand, coffee beans, and charcoal. The three materials were weighed and saturated with water after which they dried in an oven while taking their weights periodically. The results showed that the samples’ drying behavior followed the typical drying process. However, only the sand had a distinguishable preheat period. The weight difference before and after drying were found to be 1.06%, 9.32% …show more content…

The solids will be analyzed at the same temperature and similar moisture amount and container. To analyze the properties that affects drying, the drying curves of each material will be plotted. However, this study will not include discussions about possible chemical reactions in the process and the contribution of types of heat transfer in the drying rate. It is also assumed that the bulk properties of the materials are uniform.
2. Materials and Methodology
The experiment aimed to determine the drying behaviour of sand, coffee beans, and charcoal.

2.1 Preparation of the samples
Approximately 200g of sand was put in a pre-weighed drying tray. The weight of the dry sand and the tray was determined. Water was then poured on the sand until it is saturated with water. The mass of the wet sand together with the tray was determined. The same was done for the coffee beans and charcoal.

2.2 Determination of the drying behavior
For the drying process, the solids were put in an oven which was maintained at around 80 degrees centigrade throughout the drying process. The weight of each sample was determined 10 times after every 3 minutes, 10 times every after 5 minutes, and every after 10 minutes until 3 consecutive weights are determined for each

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