Iranian Association of Chemical Engineering (IAChE) Iranian Journal of Chemical Engineering (IJChE) 1735-5397 18 4 2021 12 01 Optimization of the Carbon Dioxide Absorption (CDA) and Surface Erosion (SE) of Potassium Superoxide Based Respiratory Air Tablets Using the Taguchi Method 81 98 154281 10.22034/ijche.2022.336914.1427 EN Mahdi Norouzi tehran lavizan malek e ashtar university Seyyed Ghorban Hosseini Faculty of Chemistry and Chemical Engineering, Malek-Ashtar University of Technology, Tehran, Iran. Manoochehr Fathollahi Faculty of Chemistry and Chemical Engineering, Malek-Ashtar University of Technology, Tehran, Iran Seyyed Alireza Rezvan Leylan Faculty of Chemistry and Chemical Engineering, Malek-Ashtar University of Technology, Tehran, Iran. Sajjad Ebrahimi Faculty of Chemistry and Chemical Engineering, Malek-Ashtar University of Technology, Tehran, Iran. Azam Karimian Department of Chemistry, Faculty of Science, Gonabad University, Gonabad, Iran Journal Article 2022 04 10 <em>Potassium superoxide tablets can be used in respiratory air regeneration systems within confined spaces such as spacecraft, submarines, coal mines and individual and collective masks. These tablets react with moisture and carbon dioxide in air and release oxygen. In this study, The effect of five parameters; the pressing pressure</em> <em>(0.5, 2, 4 and 5 bar), humidity (10, 15, 20, 25 %), Catalyst additives (CuSO<sub>4</sub>.5H<sub>2</sub>O, (Cu<sub>2</sub>(OH)<sub>3</sub>Cl<sub>2</sub>)<sub>2</sub>, CuO, TiO<sub>2</sub>), H<sub>2</sub>O Absorbent additives  (SiO<sub>2</sub>, LiCl, CaO, SiO<sub>2</sub>.Al<sub>2</sub>O<sub>3</sub>) and CO<sub>2</sub> Absorbent additives (LiOH, NaOH, KOH, Ca(OH)<sub>2</sub>) were investigated in four levels using the Taguchi method. The carbon dioxide absorption and Surface Erosion were selected as criteria for optimizing the performance of Potassium Superoxide tablets based on the analysis of variance and the optimal conditions of each were evaluated separately and simultaneously. The optimal conditions for the higher carbon dioxide absorption and smaller Surface Erosion include the Humidity of 15 %, pressing pressure</em> <em>of 4 bar, CuSO<sub>4</sub>.5H<sub>2</sub>O as the Catalyst, SiO<sub>2</sub> as the H<sub>2</sub>O absorbent and Ca(OH)<sub>2</sub> as the CO<sub>2</sub> absorbent. Experiments performed in the performance test show that the optimized tablets in this study show a 28 % and 79 % increase in the carbon dioxide absorption compared to commercial tablets and pure potassium superoxide respectively. The results showed that the catalysts with copper cation had the greatest effect on the performance of the tablets</em><em>.</em><br />  Potassium Superoxide Carbon Dioxide Absorption surface erosion optimaization Taguchi method https://www.ijche.com/article_154281_6472017a1a4befd198ccd500c0f8f8f3.pdf