Coke oven gas contains many impurities; how can it be further purified?
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The coke oven gas produced by our company’s coking unit, after going through processes such as cold drum treatment, ammonium sulfide treatment, benzene extraction, and desulfurization, contains a high amount of impurities. As a result, the air valves of the reciprocating compressors located after the gas holder often get clogged, requiring frequent cleaning. What are the possible components? How to control it? Currently, tar dust: 30g/m3, NA: 0.4g/m3
This is a common problem in many methanol or LNG plants that use coke oven gas; what blocks the compressors at the later stages is mainly a mixture of naphthalene and tar. The commonly used method at present is temperature-controlled adsorption to remove these impurities; depending on the requirements, naphthalene can be reduced to 1–5 milligrams, and tar to less than 5 milligrams. In this regard, we have many installations for the pretreatment of coke oven gas in China. Feel free to come and discuss if needed. If the original poster is interested, they can add QQ123807447 for further discussion.
The treatment of coke oven gas in coking operations should be fairly well-established; you can consult with technology providers or design firms. The common methods include washing, filtration, adsorption, and electrostatic tar collectors
After the preliminary treatment of coke oven gas in the chemical processing stage, tar, naphthalene, and dust still precipitate during compression. At present, our facility uses the TSA method for removal. The effect is okay.
This treatment process is now well-established; after temperature-controlled adsorption treatment, both tar and naphthalene meet the corresponding process requirements, and the catalysts used are also reliable and effective.