Treatment of carbon monoxide in catalytic cracking flue gas
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Recently, environmental regulations have begun to require monitoring of the CO content in the flue gases from catalytic cracking. Are there any specific figures available? Experts, please provide such information. Additionally, are there any new processes that can be used to treat carbon monoxide so that it meets the required standards?
Environmental assessments consider carbon monoxide? I haven’t heard of that! We only assess nitrogen oxides, particulate matter, and sulfides
Carbon monoxide in the regeneration flue gas of catalytic cracking units needs to be monitored, but specific control parameters do not seem to be clearly defined. However, since carbon monoxide in the regenerated flue gas needs to be catalytically burned using an oxidizer in order to reduce its concentration, this should be considered in conjunction with the process and online monitoring.
In the first two years, it was said that the CO level needed to be controlled, and proposals were sought for a limit of no more than 300 ppm; now there’s no activity on this matter
I haven’t heard of any, and anyway we don’t conduct tests. The safety and environmental inspections also check for carbon monoxide
This post was last edited by zirulinwu on 2018-8-14 at 12:38. The contents of CO, O2, SO2, and H2O in flue gas were measured a few years ago in our laboratory; through the use of catalysts, CO levels could be reduced to below 15 ppm, with simultaneous removal of NOx. If the content of these impurities can be adjusted to an appropriate level, SO2 can also be removed to several dozen ppm.
For this issue, it is more apparent in devices that are not fully regenerative, but abroad, carbon monoxide burners are used! The energy consumption is quite high; domestic equipment does not meet the requirements, so it is impossible to implement this!
Shanxi Coal Chemistry Institute. I worked on it during my postgraduate studies, but the problem of the catalyst’s sensitivity to oxygen was not resolved.
For a fully regenerated device, the CO level in the flue gas chromatography analysis is zero.
Fully regenerated, no issues with CO control； It is mainly oxygen-deficient regeneration; in backside CO incinerators, poor control can lead to overheating. With sufficient temperature, air volume, and residence time, it should work fine – the issue lies in control.