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Hydrogen is the most abundant element in the universe which is a source of energy obtained through several processes, one of which is the decomposition of water by aluminum.This reaction aided by NaOH as a binder layer of aluminum oxide on the surface of the aluminum so that the aluminum dissolved with the solution. This study aims to design a hydrogen reactor with a semi-continuous flow system where this system can produce hydrogen gas by refilling aluminum and removing wasted periodically without affecting the hydrogen gas produced. Hydrogen gas produced by semi-continuous hydrogen reactors to be used as fuel in gas stoves, and compared to gas stoves fueled by LPG. The design of hydrogen reactors uses materials that are not affected by the corrosive of NaOH. The hydrogen reactor is consist of several main parts including the reactor made of glass, reservoir, inlet and bubbler made of PVC, and gas storage tubes with iron plate material. The reactor performance was tested by reacting two variations of materials including used aluminum cans and aluminum foil. The first testing using 30 grams of used aluminum cans produces hydrogen gas of 24 liters, while the second testing using 36.54 grams of aluminum foil produced of 49 liters of hydrogen gas. The power produced by hydrogen stove ranges from 1.02 1.11 kW with a maximum efficiency of 66.02%, while the LPG stove ranges from 1.18 1.27 kW with a maximum efficiency of 80.13%.

Design of hydrogen reactor based on decomposition of water by aluminum as an alternative to gas fuel