# What emission factors apply to blast furnace gas and coke oven gas?

Canonical: https://senseible.earth/answers/blast-furnace-gas-and-coke-oven-gas-emission-factors

The IPCC 2006 defaults are about 260 t CO2 per TJ for blast furnace gas and 44.4 t per TJ for coke oven gas. Blast furnace gas is mostly CO and CO2, so it is very carbon-heavy per unit of energy. Use the supplier measured composition when it is available.

## Who counts what

- A steel plant counts the gas it burns itself.
- A buyer who burns bought gas counts it in Scope 1.
- Under CBAM, waste gases follow their own allocation rules.

## Data to ask for

- Volume delivered in Nm3 per month.
- Calorific value and composition from the supplier lab.
- Carbon content, if a buyer wants a measured factor.

## What Senseible does here

Senseible reads fuel invoices and electricity bills and applies IPCC 2006 factors and the CEA grid factor (0.710 kg CO2 per kWh), so you can compare Scope 1 and 2 before and after a change from the documents themselves.

- [Vizag steel BF-BOF CBAM figure](https://senseible.earth/answers/vizag-steel-plant-bf-bof-cbam-figure)
- [Cupola coke emissions](https://senseible.earth/answers/cupola-furnace-coke-emissions-per-tonne)

Sources: [2006 IPCC Guidelines, Volume 2 Energy](https://www.ipcc-nggip.iges.or.jp/public/2006gl/vol2.html), [European Commission, CBAM legislation and guidance](https://taxation-customs.ec.europa.eu/carbon-border-adjustment-mechanism/cbam-legislation-and-guidance_en), [GHG Protocol Corporate Standard](https://ghgprotocol.org/corporate-standard)

Last reviewed 2026-10-23.