Deoxygenation of coke oven gas
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Due to the requirements of the downstream processes, we need to further deoxidize the coke oven gas coming from the desulfurization and benzene washing tower； The composition of the coke oven gas after passing through the benzene washing tower is as follows: CO2: 2.5%, CmCn: 1.5%, CO: 4%, CH4: 24%, H2: 60%, N2: 7%, O2: 0.6%, and others: 0.4%. The temperature is 27°C, the pressure is 7 kPa(g), and the flow rate is 15,000 Nm3/h. It is necessary to deeply deoxidize this gas to 50 PPM ； I’m seeking advice from experts: what kind of deoxygenation process should be used? What deoxidizer should be used?
For the deoxygenation of coke oven gas, the mainstream process still involves the use of palladium catalysts for deoxygenation and molecular sieves for dehydration. I wonder what the specific use of this gas is, according to the poster?
After deep deoxygenation of coke oven gas, it needs to be fed into an anaerobic fermentation tank; therefore, the concentration must be below 50PPM； Do you have a flowchart for deoxidation using a palladium catalyst + molecular sieve? Which engineering company is good at this process? My email: cz05110137@163.com
After desulfurization and benzene washing, coke oven gas still contains a high amount of heavy components such as tar, sulfides, benzene, naphthalene, etc. If these components are not subjected to further treatment, they can still be harmful to palladium catalysts. So it’s also difficult to remove this deoxygenation here.
Would it be better to first use a dry treatment method, followed by activated carbon adsorption and then oxygen removal?
As long as components such as hydrogen sulfide, benzene, and naphthalene are reduced to trace levels, palladium catalysts can be used for deoxygenation; it is no problem to reduce oxygen levels to below 10PPM.
Can it be heated to 200°C? If possible, I can do it.
It leads to the anaerobic tank – your sulfides are still too high! This path doesn’t work. . . We manufacture anaerobic reactors such as ICEGSB/USB/ABR/USR, and we are all concerned about high sulfate levels
This post was last edited by lishouqiang_198 on 2016-1-15 21:30. In the hydrodesulfurization of iron molybdenum/nickel molybdenum, oxygen reacts with hydrogen; however, a dechlorinating agent is required in the appropriate desulfurization stage to ensure the safety of the methanation catalyst.
Has the original poster’s problem been solved? I just sent you an email; you can take a look :)