The invention provides processes and apparatuses for safely, rapidly, cost-effectively and efficiently producing a superheated steam product or dry saturated steam product that can be employed to generate electrical power, or in other manufacturing and/or non-manufacturing processes, in an environmentally clean manner without causing corrosion to electrical power-generating devices. These processes and apparatuses involve the combustion of one or more fuels containing the elements hydrogen and/or carbon, which can be derived from waste materials, such as the rubber from scrap tires. Water that circulates around one or more combustion chambers and/or areas, but that does not enter into the combustion chambers or areas, becomes converted into a high purity steam product The present invention also provides processes and apparatuses for recycling or eliminating waste materials, and for transforming hazardous materials into non-hazardous materials, and fuels that can be employed in the foregoing processes and apparatuses.