Although a plentiful supply of hydrogen is available in nature, it does not occur in the form required for cold combustion in the Vitovalor. It must therefore be obtained from natural gas in an earlier process. Depending on requirements, the Vitovalor PT2 can be operated with natural gas H, E, LL or bio natural gas. The Vitovalor PA2 auxiliary unit can be operated with E and LL natural gas.
The combustion gas supplied flows through a reformer built into the unit, where a catalytic converter splits it into hydrogen in a two-stage reaction. The first stage of the conversion process produces a mixture of hydrogen and carbon monoxide. In the second, downstream gas cleaning process, carbon monoxide is converted to carbon dioxide. This is followed by cold combustion, which produces electricity and heat simultaneously.