Metrol® is an engineered fuel initially combining hydrogen with nitrogen from the air, not unlike other nitrogenous compounds similar to ammonia [ NH 3 ] or urea [ CO(NH 2 ) 2 ]. Metrol® chemically stores and distributes energy for on-demand use of hydrogen as a fuel for internal combustion engines and fuel cells; it provides storage, transport, and user convenience as an energy-dense liquid.

When Metrol is 'burned" the hydrogen becomes water vapor and the nitrogen returns to atmosphere for endless preparation of net-hydrogen liquid fuel. Metrol® is the registered trademark of McAlister Technologies for net-hydrogen liquid fuel that can be stored in existing gasoline, diesel and jet fuel tanks.

McAlister's hydrogen-carbon production process provides an exponential multiplier of economic and environmental values. As a result, this new technology enables sustainable co-production of low-cost hydrogen and durable carbon. The carbon can reinforce equipment to convert solar, wind, moving water and geothermal energy into far more electricity, hydrogen and heat compared to burning such carbon one time. Carbon is prevented from forming harmful pollutants by becoming a sustainable energy conversion economic asset.