Comparative study on life cycle energy consumption, carbon emissions and economic performance of various coke-oven gas utilization schemes

•Comprehensive competitiveness of coke-oven gas utilization schemes is conducted.•Effects of allocation principle and price on scheme’s performances are investigated.•Power generation is the most competitive scheme as performs better in all aspects.•Natural gas production competitiveness is slightly higher than hydrogen production.•Methanol production only slightly outperforms natural gas in capital investment.