Estudo da viabilidade da extração de água atmosférica utilizando dessecante líquido

Abstract

This work aims to evaluate the feasibility of the drinking water production process through the extraction of humidity contained in atmospheric air in the presence of a lithium chloride solution. This material is a hygroscopic salt that can be used as a liquid desiccant with the goal of absorbing water present in the atmospheric air at a given relative humidity. The drinking water can be later extracted from the weak solution of lithium chloride using a regeneration process, where the solution undergoes a phase change and the water vapor is collected for posterior condensation. For the feasibility study of this process, the computational tool AspenPlus was used, it allows the modeling and analysis of thermal, chemical and dynamic systems through a primary interface with the use of graphic diagrams with blocks and customizable libraries. With the developed model, it was possible to obtain values for the energy consumption needed for the system to operate eight hours a day with the goal of a daily production of 10 liters of water.