Discussion on the process of producing LNG by liquid nitrogen washing of coke oven gas and simultaneous ammonia synthesis
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Our company is planning to carry out technical upgrades to use the liquid nitrogen washing process for the production of LNG from coke oven gas, with ammonia synthesis as a by-product. Do anyone have any good suggestions or recommendations? What aspects need to be taken into consideration in this process?
After being subjected to naphthalene removal, pressurization, dry purification, decarburization, dehydration, mercury removal, and removal of heavy hydrocarbons, the coke oven gas enters a cold box where it is cooled using a main cooling heat exchanger. It then passes through a dehydrogenation tower; the hydrogen-rich gas coming out of the top of this tower goes into a nitrogen washing tower, while the liquid at the bottom of the tower is sent to a decarburization tower. The nitrogen and hydrogen gases are then sent on to ammonia synthesis. The specific design hasn’t been finalized yet; this is the general process