pyrolyse BrE
pyrolyze AmE

Finally, a truck equipped with a pyrolyzer can move from place to place to pyrolyze biomass.

To generate four pounds of charcoal (which is mostly carbon), you'd have to pyrolyze about 12 pounds of wood.

Another option is to make more methane than needed and pyrolyze the excess of it into carbon and hydrogen (see above section) where the hydrogen is recycled back into the reactor to produce further methane and water.