TECHNOLOGY FOCUS - CHEMICAL ENGINEERING - Preferred Processes: In the preparation of hydrogen (H2), the unstable water is cracked by supplying energy, especially low energy, and/or at the molecular level by separating the diamagnetic fraction from the paramagnetic fraction. In the production of a fuel (mixture), the concentration of ammonium nitrite (NH4NO2) and/or ammonium nitrate (NH4NO3) is suited to or varied according to the fuel requirement of the engine. Nitrogen-oxygen (N-O) compound(s), especially nitrogen dioxide (NO2), hydrogen (H)-N-O compound(s), especially nitrous acid (HNO2) or nitric acid (HNO3) and/or N-H compound(s), especially ammonia (NH3), and water (H2O) are mixed in the first reaction zone and converted to fuel (mixture) by charge transfer into the unstable state. In particular, the N-O compound, especially NO2, is produced by dissociation of HNO3 into NO2, H2O and O2 or by catalytic decomposition of air. In the first zone, the H-N-O compound especially HNO2 or HNO3, is converted to the N-H compound, especially NH3, using metal(s), e.g. zinc. Energy is supplied to the first and/or second reaction zone.Equipment: (claimed) For production of H2 as fuel, the equipment has reaction unit(s) or chamber(s) for converting H2O to an unstable state with O3 and catalyst(s) or with NOx and O3; and subsequent or parallel separation unit(s) or chamber(s) for cracking this unstable water into O2 and H2. For production of fuel (mixture), the equipment has second chamber(s) fed with a mixture of H2O, NH4NO2 and/or NH4NO3 and a mixture of air, O2 and/or O3 for shifting this into an unstable state.Preferred Equipment: In H2 production, the separation unit/chamber is followed by a unit or chamber for recycling liquid separated from the fuel to the reaction unit/camber. In production of fuel (mixture), the NH4NO2 and/or NH4NO3 concentration is controlled to suit or according to the fuel consumption of the engine(s). The second reaction zone is preceded by a first reaction zone. Energy is supplied to one or both zones. The first zone is preceded by a 2-stage or 2-part gas generator unit with high tension circuit for producing NOx, especially NO2, and O3. The gas generator, separation unit and/or second reaction zone is connected to energy source(s), preferably low energy source(s), especially (12 V) voltage source(s). The equipment also has pump(s) for supplying or recycling the fuel.