ISO 14404-1:2013 pdf free
ISO 14404-1:2013 pdf free.Calculation method of carbon dioxide emission intensity from iron and steel production
CO2 emissions from imported material related to outsourced steel production activities outside the boundary and from imported electricity and steam into the boundary
Note 1 to entry: Possible outsourced activities are, for example, production of coke, burnt lime, burnt dolomite,pellet, sintered ore, hot metal, cold iron, direct reduced iron, oxygen, nitrogen and argon.
Note 2 to entry: CO2 emissions from imported material in this term is categorized as “other indirect GHG emissions” in ISO 14064-1.
Note 3 to entry: CO2 emissions from imported electricity and steam in this term are categorized as “energy indirect GHG emissions” in ISO 14064-1.
Coke oven gas, blast furnace gas and BOF gas, which are produced in blast furnace-BOF process in the integrated steel plants, are generically called by-product gas. Although they are burnable and used as fuel, the gases are selectively utilized depending on their chemical composition and generated volume which differs largely from gas to gas. Especially, blast furnace gas, called lean gas due to the low heat value, is generally used as fuel for electrical power generation. Coke oven gas has higher heat value and then is widely used as fuel for a reheating furnace and other heating processes. The generated volume of BOF gas is not large and then the gas is often used as the mixture with other by-product gases.
In an integrated steel plant, by-product gases are used for various heat sources inside the plants, but excess by-product gases are often exported and used outside of the boundary. These exported by-product gases are subject to credit emission. As the energy amount of these exported gases is relatively large, their evaluation is critical to calculate CO2 intensity of the steel plant.
Two credit emission factors for by-product gases are given in Table 4. The first one is based on world average electricity equivalent (D.1) and the second one is based on natural gas equivalent (D.2).ISO 14404-1 pdf download.
