A gas generator assembly comprising: a pressure generator; a propellant chamber coupled with the pressure generator, the propellant chamber houses a fluid amine based mono-propellant; a reaction chamber coupled with the propellant chamber, the reaction chamber includes: a reaction chamber housing, a porous reaction matrix including a plurality of linear matrix passages within the reaction chamber housing, the reaction matrix includes a catalyzing agent coupled along the plurality of linear matrix passages, and the catalysing agent is configured to non-combustibly catalyse the amine based mono-propellant into one or more pressurized gases as the amine based mono-propellant passes through the plurality of linear matrix passages, an injector in communication with the propellant chamber, the injector is configured to deliver the amine based mono-propellant to the porous reaction matrix, and a preheating substrate coupled with the porous reaction matrix, the preheating substrate including a hypergolic substance configured to react with the amine based mono-propellant to preheat the porous reaction matrix; and a discharge nozzle coupled with the reaction chamber, the discharge nozzle is configured to accelerate and discharge the one or more pressurized gases. a pressure generator; a propellant chamber coupled with the pressure generator, the propellant chamber houses a fluid amine based mono-propellant; a reaction chamber coupled with the propellant chamber, the reaction chamber includes: a reaction chamber housing, a porous reaction matrix including a plurality of linear matrix passages within the reaction chamber housing, the reaction matrix includes a catalyzing agent coupled along the plurality of linear matrix passages, and the catalysing agent is configured to non-combustibly catalyse the amine based mono-propellant into one or more pressurized gases as the amine based mono-propellant passes through the plurality of linear matrix passages, an injector in communication with the propellant chamber, the injector is configured to deliver the amine based mono-propellant to the porous reaction matrix, and a preheating substrate coupled with the porous reaction matrix, the preheating substrate including a hypergolic substance configured to react with the amine based mono-propellant to preheat the porous reaction matrix; and a discharge nozzle coupled with the reaction chamber, the discharge nozzle is configured to accelerate and discharge the one or more pressurized gases. a reaction chamber housing, a porous reaction matrix including a plurality of linear matrix passages within the reaction chamber housing, the reaction matrix includes a catalyzing agent coupled along the plurality of linear matrix passages, and the catalysing agent is configured to non-combustibly catalyse the amine based mono-propellant into one or more pressurized gases as the amine based mono-propellant passes through the plurality of linear matrix passages, an injector in communication with the propellant chamber, the injector is configured to deliver the amine based mono-propellant to the porous reaction matrix, and a preheating substrate coupled with the porous reaction matrix, the preheating substrate including a hypergolic substance configured to react with the amine based mono-propellant to preheat the porous reaction matrix; and a discharge nozzle coupled with the reaction chamber, the discharge nozzle is configured to accelerate and discharge the one or more pressurized gases.