Process for the production of hydrogen by thermochemical route based on hydrogen chloride treatment of cerium

摘要

Thermochemical production of hydrogen from water, based on cerium-chlorine cycle, comprises: a first reaction comprising reducing chlorine, chlorinating cerium oxide and oxidizing cerium chloride; and a second reaction comprising reducing chlorine, chlorinating cerium oxide, oxidizing cerium chloride and oxidizing cerium oxychloride. Thermochemical production of hydrogen from water, based on cerium-chlorine cycle, comprises: a first reaction (comprising: reducing chlorine by reacting water (1 mol) and chlorine (1 mol) to give hydrochloric acid (2 mol) and oxygen (0.5 mol); chlorinating cerium oxide by reacting hydrochloric acid (8 mol) and cerium oxide (2 mol) to give cerium chloride (2 mol), chlorine (1 mol) and water (4 mol); and oxidizing cerium chloride by reacting cerium chloride (2 mol) and water (4 mol) to give cerium oxide (2 mol), hydrochloric acid (6 mol) and hydrogen (1 mol)); and a second reaction (comprising: reducing chlorine by reacting water (1 mol) and chlorine (1 mol) to give hydrochloric acid (2 mol) and oxygen (0.5 mol); chlorinating cerium oxide by reacting hydrochloric acid (8 mol) and cerium oxide (2 mol) to give cerium chloride (2 mol), chlorine (1 mol) and water (4 mol); and oxidizing cerium chloride by reacting cerium chloride (2 mol) and water (2 mol) to give cerium oxychloride (2 mol) and hydrochloric acid (4 mol); and reacting cerium oxychloride (2 mol) and water (2 mol) to give cerium oxide (2 mol), hydrochloric acid (2 mol) and hydrogen (1 mol)), where the chlorination of cerium oxide is carried out in liquid phase by passing the cerium chloride in solution.