reformers

noun
  1. 1

    One who reforms, or who works for reform.

  2. 2

    (history) One who was involved in the Reformation.

  3. 3

    (chemical engineering, fuel cells) A device which converts hydrocarbons into a hydrogen-rich mixture of gases.

  4. 4

    (chemical engineering) A device used to convert petroleum refinery naphthas, typically having low octane ratings, into high-octane liquid products called reformates.

Source: https://en.wiktionary.org/wiki/reformer, https://en.wiktionary.org/wiki/reformers