Methanol Production from Coke Oven Gas and Blast Furnace Gas

In this paper, a novel process is proposed which converts coke oven gas (COG) and blast furnace gas (BFG) from steel refineries into methanol. Specifically, we propose to use blast furnace gases (BFG) as a carbon source, which is a fuel with a low heating value that contains CO2 and other gases. CO2 is stripped from the BFG and blended with H2-rich COG to adjust the (H2 - CO2)/(CO + CO2) molar ratio for methanol conversion. We also propose an advanced desulphurization process to remove certain sulphur compounds from the COG which can poison the methanol synthesis catalysts. The process design and simulation results using Aspen Plus are reported and used in a feasibility analysis to determine the potential environmental and energy benefits.