What is the composition of hydrogen produced as a by-product of coke oven gas methanation?
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More and more coking plants are opting for the methanization process to convert coke oven gas into natural gas, in order to maximize profits. I wonder if anyone knows what the purity of the hydrogen gas produced as a by-product of this methanization process is What are the main impurities? How are such hydrogen plants generally used? How much would it cost per cubic meter if we wanted to purchase it?
I’ll only talk about the situation in our plant. Under conditions where no carbon supplementation is used, 20 to 30 percent of the hydrogen remaining after methanation stays in the mixture. After methanation, our plant carries out liquefaction; following that, a PSA pressure swing adsorption system is used to produce hydrogen, which is then sent to the inlet of the facility using fans
I want to know what the components are before hydrogen production via pressure swing adsorption Thank you
The hydrogen content ranges from 60 to 80; the rest is methane and nitrogen. The composition and processing methods vary from plant to plant, so you can have someone do the calculations
Can production staff figure it out without using laboratory analysis data?
Thank you so much! However, I’m still a bit confused: sending the hydrogen gas after pressure swing adsorption back to the inlet increases its concentration and partial pressure. My understanding is that this makes the methanation reaction easier to occur, but it’s not possible to increase the hydrogen concentration indefinitely – hydrogen must eventually be removed from the system, right? Is the hydrogen produced generally burned or sold as an industrial gas?
I think it can be sold or used as fuel, but our factory operates in a carbon-replenishment mode, capable of adding carbon dioxide and thereby increasing the load indirectly
Oh, I see. But at the moment, there isn’t much available as a complement to carbon dioxide, and it’s still difficult to find large sources of carbon dioxide. It’s really impressive that your company is able to achieve this – you’re truly at the forefront in China!