### Question
How is the "oxygen-fuel systems" defined?


### Answer
The term **oxygen-fuel systems** is defined in *42 U.S.C. § 16494* as follows -

> systems that utilize fuel efficiency benefits of oil, gas, coal, and biomass combustion using substantially pure oxygen, with high flame temperatures and the exclusion of air from the boiler, in industrial or electric utility steam generating units

#### Citation:
  - *42 U.S.C. § 16494*
  - Heading: **CHAPTER 149-NATIONAL ENERGY POLICY AND PROGRAMS > SUBCHAPTER XIII-MISCELLANEOUS**

