Inadequate water supply is one of the most crucial issue to laid down as a priority. Water demand increases worldwide by 1% per year, due to a combination of population growth, economic development, production of energy and human consumption habits, associated with climate change. Therefore, it becomes necessary to find new water resources for meeting the increasing demand. The possibility to extract water from air gives attention to the development of atmospheric water harvesting technologies, in particular that one based on adsorption materials. This work aims to study the behaviour of alginate-based sorption material in an atmospheric water extraction system. The adsorption process is simulated by a Computational Fluid Dynamic model, performed by the software STAR CCM+.