Hydrogen extraction from coke oven gas
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Our company is currently conducting feasibility studies for a coal tar hydrogenation project, and hydrogen is planned to be obtained by extracting it from coke oven gas. I would like to ask the following: What is generally done with the remaining gas after hydrogen extraction from coke oven gas? Can it be returned to the coke ovens, or are there other uses for it? (The company does not want to install a methane liquefaction facility.) How much coke oven gas is required to produce one cubic meter of hydrogen? Is extracting hydrogen from coke oven gas the most economical approach? Thank you to all experts for your guidance!
The exhaust gas after hydrogen extraction can be used as fuel, and the simplest method for hydrogen extraction is pressure swing adsorption. As for how much feed gas is required to produce one cubic meter of hydrogen, it depends on the hydrogen content in the feed gas. What is the hydrogen content in your coke oven gas? Normally, about two cubic meters of coke oven gas are needed to produce one cubic meter of hydrogen through purification.
The H2 content is around 52%. Thank you! Can the exhaust gas be reused in the furnace? The calorific value of this portion of the exhaust gas is high.
The yield of PSA can generally reach over 90%, the hydrogen purity can be greater than 99.9%, and the off-gas is recycled as fuel gas.
The desorbed gas obtained from pressure swing adsorption for hydrogen production contains a relatively high sulfur content; if it is to be used for other purposes, the issue of sulfur removal must be taken into account. This is something we encounter in real life. Please refer to
The yield of PSA can generally reach around 85%, the purity of hydrogen can be above 99.9%, and the off-gases are recycled as fuel gas. :)
Hello, the technology for hydrogen extraction from coke oven gas is quite mature. The key issue at present is the hydrogen demand for tar hydrogenation; if there is enough coke oven gas, hydrogen extraction can be carried out directly, otherwise conversion processes are used instead. It’s necessary to consider the investment and energy consumption involved. If possible, please provide me with the composition of the coke oven gas so that I can prepare a simple plan for you