"Often... terms carbonization and pyrolysis are used almost interchangeably. Pyrolysis has the broader meaning: breaking... molecules by... heat or thermal energy. ...[P]yrolysis ...could be run to make gases and liquids rather than solids as the primary product. ... narrowly defined, refers to conversion of a starting material into carbon, or a carbon-rich solid. ...[One can] pyrolyze a hydrocarbon feedstock for the purpose of carbonization, but carbonization is not... pyrolysis by another name. Carbonization can be effected without heat as... primary driving force... Carbonization driven by thermal energy usually requires >500°C."