Apparatus and method for generating oxygen from sodium percarbonate and water, including seawater

A method for generating oxygen gas from sodium percarbonate and water comprising:

• combining a first quantity of the sodium percarbonate, a second quantity of the water, a third quantity of potassium iodide, and a fourth quantity of sodium sulfate decahydrate in a chamber, wherein:
• a first ratio of the second quantity to the first quantity is in a first range of 2.5 to 8 by weight between the water and the sodium percarbonate,
• a second ratio of the third quantity to the second quantity yields a molarity in a second range of 0.25 to 1.25 moles of the potassium iodide per liter of the water, and
• a third ratio of the fourth quantity to the first quantity is in a third range of greater than zero to 75% of that needed to balance an endothermic heat of dissolution of an adduct of the sodium percarbonate and an endothermic heat of dissociation of the sodium sulfate decahydrate with an exothermic heat of formation of the oxygen gas;
• chemically reacting a chemical reaction between the sodium percarbonate and the water in the chamber, wherein the potassium iodide is a catalyst for the chemical reaction and the sodium sulfate decahydrate is a temperature moderator for the chemical reaction;
• and
• outputting the oxygen gas generated from the chemical reaction at an output port from the chamber.