Code of Federal Regulations > Title 40 > Chapter I > Part 98 > Subpart K > Appendix - Table K-1 to Subpart K of Part 98—Electric Arc Furnace (EAF) CH4 Emission Factors

Regulations last checked for updates: Feb 21, 2025

Title 40 - Protection of Environment last revised: Nov 21, 2025

Appendix - Table K-1 to Subpart K of Part 98—Electric Arc Furnace (EAF) CH4 Emission Factors

Alloy product produced in EAF	CH4 emission factor (kg CH4 per metric ton product)
	EAF Operation
	Batch-charging	Sprinkle-charging ^a	Sprinkle-charging and >750 °C ^b
Silicon metal	1.5	1.2	0.7
Ferrosilicon 90%	1.4	1.1	0.6
Ferrosilicon 75%	1.3	1.0	0.5
Ferrosilicon 65%	1.3	1.0	0.5

^a Sprinkle-charging is charging intermittently every minute.

^b Temperature measured in off-gas channel downstream of the furnace hood.

authority: 42 U.S.C. 7401-7671q.

source: 74 FR 56374, Oct. 30, 2009, unless otherwise noted.