## 3 Results and Discussion  
### Influence of Desorption Temperature on the Water Content Removal  
The effect of the adjusted adsorption temperature of 308, 318, 328, 338, and 345 K on the water content removal is shown in Figure 3. The recent experiment revealed that the water content removal (adsorption/desorption amount) increased with increasing of desorption air temperature. The ability of air to hold the water vapor improves as its temperature increases [39]. Consequently, as proven by Equations (2) and (3), the humidity ratio of the outlet air rose, resulting in higher differences between the humidity ratio between the inlet and outlet. Further, the water content removal during the adsorption/desorption processes tended to increase. Figure 3 also implies that the rate of adsorption and desorption decreased with the increase of time. In the desorption process, the water content removal increased rapidly, then decreased when the saturation pressure of the process air and the surface of the material became equilibrium. The reason behind this behavior was that at the beginning of the desorption process, the desiccant material was cooled, and the humidity content was high. Introducing hot and dry airstream into the cool desiccant material revealed high moisture adsorption in the beginning up to a particular time. After that, the gradient of moisture adsorption changed its direction, which indicated the conditions nearly reached saturaturation. For the case of adsorption, the behavior was slightly different from that of the desorption phase. At the beginning of the process, the water content removal was quite high, then gradually decreased and became steady. For all cases, the adsorption process finished in a similar point because the adsorption temperature and switching time remained unchanged during the process.  
\begin{table}
\begin{tabular}{c c c} \hline \hline
**Parameter** & **Symbol** & **Value** \\ \hline Humidity ratio & \(X\) & 2.37\% \\ Dehumidification index & \(D_{i}\) & 4.61\% \\ Latent effectiveness & \(\varepsilon\) & 4.8\% \\ Latent heat ratio & \(LHR\) & 5.31\% \\ Reynolds number & \(Re\) & 3.72\% \\ \hline \hline \end{tabular}
\end{table}
Table 3: Uncertainty analysis.  
There was a different behavior observed on the desorption side when the temperature increased to the values of 338 and 345 K, as indicates in Figure 3. At a high desorption temperature of more than 338 K, the desorption phase was completed earlier than the other variation. This behavior was caused by the water-vapor sorption kinetics properties of the polymer adsorbent. At high desorption temperature, the water vapor sorption kinetics is high [40], leading to a decrease in the time required for the desorption phase. It implies that the desorption rate at a high temperature is faster, as compared to the low temperature. Additionally, the behavior of the rate of adsorption material, when exposed to high temperatures, can be explained by the mechanism of water vapor adsorbed into the polymer. It followed the Arrhenius equation, where the adsorption rate is dependent on temperature and activation energy. In high desorption temperatures, the molecular motions are easier; therefore, they show rapid uptake as compared to the low desorption temperature [41]. The high temperature leads to the quicker release of water vapor. The results show that the values of adsorption/desorption amount increased from 5, 5.4, 5.8, 7.4, and 7.9 g/kg, respectively, for desorption temperatures (_Tdes_) of 308, 318, 328, 338, and 345 K.