As the ethylene industry considers potential pathways to reduced CO2 emissions, partial or full fuel switching from methane-rich tail-gas to hydrogen has featured in numerous papers and presentations.
While the direct CO2 emission benefits of hydrogen combustion are straight-forward to calculate, the design of a hydrogen burner compatible with modern ethylene cracking furnaces must address numerous technical challenges. Included in those challenges are:
- Maintaining adequate heat distribution and avoidance of localized high coking rates.
- Managing NOx emissions as the fuel-gas hydrogen content increases.
- Providing acceptable burner stability across the full fuel-gas range from natural-gas to hydrogen.
This paper will review progress made in developing a full-scale hydrogen burner for 100% floor-fired ethylene furnaces, including test-furnace performance trends.
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