What is the reason for the heating caused by silica gel desiccant

What is the reason for the heating caused by silica gel desiccant

When silica gel desiccant is used for moisture absorption and prevention, sometimes it may generate heat. Many users are not aware of the reasons, so they may have some doubts when using it. Therefore, in order to ensure the efficiency of daily use, the following will introduce the causes of heat generation in its products.

The reason why silica gel desiccant generates heat during the moisture absorption process is because it undergoes a chemical reaction. As long as the desiccant absorbs water, it will undergo a chemical reaction to release heat, so there is a slight heat when in contact.

There are two types of chemical reactions in our natural world. One is endothermic and cannot occur spontaneously, requiring heating equipment during the reaction. The other is exothermic. When a desiccant absorbs water, the chemical reaction will release heat, and this is a slow reaction process. The heat will gradually be released, so it is always hot. And desiccants are hygroscopic for a long time, so the heat will gradually accumulate.