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http://dx.doi.org/10.7316/KHNES.2022.33.6.636

Life Cycle Analysis of Greenhouse Gas Emissions of By-Product Hydrogen Produced from Coke Oven Gas in Steel Mill  

YEIM LEE (Department of Mechanical Engineering, Seoul National University)
WOOJAE SHIN (Department of Mechanical Engineering, Seoul National University)
YEJIN YU (Department of Mechanical Engineering, Seoul National University)
HANHO SONG (Department of Mechanical Engineering, Seoul National University)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.33, no.6, 2022 , pp. 636-642 More about this Journal
Abstract
The "Hydrogen Economic Activation Road map" was announced in 2019, and hydrogen demand is expected to exceed 470,000 tons per year in 2022 and keep increasing. Under this circumstance, it has become important to understand the greenhouse gas (GHG) emissions associated with various hydrogen production pathways. In this study, the evaluation of life cycle GHG emissions regarding the hydrogen produced as by-product from coke oven gas (COG) in steel mill is conducted. To cover the possible range of operations, three literatures were reviewed and their data of inputs and outputs for the process were adopted for calculation. Life cycle inventories and emission factors were mostly referred to GaBi and Intergovernmental Panel on Climate Change (IPCC) guidelines, respectively. When there are multiple products from a single process, the energy allocation method was applied. Based on these sources and the assumptions, the life cycle emission values of COG-based hydrogen were found to be 3.8 to 4.7 kg/CO2-eq./kg-H2.
Keywords
By-product hydrogen; Life cycle analysis; COG; Coke Dry Quenching; COG purification;
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