CO₂-neutral Process Heating for Carburizing Furnaces – an Ecological Analysis*

Abstract In order to achieve the goal of a massive reduction CO 2 -emissions, fossil fuels have be substituted. Germany, continuous carburizing furnaces for high capacities are almost exclusively fired by natural gas due lower energy costs. Electrical heating and hydrogen combustion obvious alternatives. While electrical elements state-of-the-art these types furnaces, has not been investigated. Furthermore, two alternatives strongly depend on specific mix, which determines -emissions. This case study compares different process heat generation options ring hearth automotive steel parts quantitative approach. The investigated gas/air as reference, hydrogen/air heating. Besides balances, primary consumption resulting -emissions calculated. possible developments until 2050 analysed. results show that both alternative cases potential decrease development mix and, therefore, future expansion renewable sources.