Two problems with the honeycomb activated carbon adsorption/desorption + RCO process
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1. Water-resistant honeycomb activated carbon: after reaching saturation in terms of adsorption, it is desorbed using 90°C hot air. Desorption is carried out approximately once every 3 days, with continuous production over 24 hours. As the activated carbon goes through repeated cycles of adsorption and desorption, how long can it be used before it needs to be replaced? 2. Can a fixed-bed activated carbon adsorption bed be used, with the pressure difference between the inlet and outlet used to determine whether the activated carbon has reached saturation? I would like to ask the experts here, thank you
We are not familiar with activated carbon; our main focus is on activated carbon fibers. Nevertheless, we hope that someone experienced can help you solve this problem
RCO is probably used for the desorption process, right? 1. The time required to replace activated carbon is determined by factors such as the quality of the activated carbon, the volume of exhaust gas, its components, and concentration; therefore, no specific figure can be given – it’s generally somewhere between 3 months and 1 year. 2. No, saturation does not have a significant impact on the pressure difference. The currently reliable method is to measure the concentration of exhaust gas at the inlet and outlet of the activated carbon adsorber in order to calculate the adsorption efficiency. When the adsorption efficiency is below a preset value (usually 80-90%), the activated carbon needs to be replaced.
The time required to replace activated carbon is determined by factors such as the quality of the activated carbon, the volume of exhaust gas, its components, and concentration; therefore, it cannot be generalized. It is generally around 3 months to 1 year:time:
Thank you, as I’ve contacted many companies that deal with RCOs; some say the activated carbon needs to be replaced after 6 uses, while others claim it can last for 2 years, so I’m not sure what to do. Additionally, I saw several sources stating that differential pressure is used to determine when activated carbon becomes saturated with adsorbates; I tried to figure it out on my own but didn’t understand it, so it seems I need to keep looking for an answer.
We have the multi-chamber furnace activated carbon regeneration technology introduced from the United States; Beijing Rikson Di Environmental Protection Technology Co., Ltd., 13466363427.
We have the multi-chamber furnace activated carbon regeneration technology introduced from the United States; Beijing Rikson Di Environmental Protection Technology Co., Ltd., 13466363427.
Does the presence of water vapor in the exhaust gas affect the adsorption efficiency of activated carbon?
Since the surface of activated carbon usually contains a large number of oxygen-containing groups, activated carbon generally has a strong water absorption capacity, which leads to competitive adsorption with organic substances. Additionally, activated carbon contains ash (metal oxides), further enhancing its water absorption capacity. As a result, the adsorption efficiency of activated carbon will be reduced
When asking about RCO and the issues related to activated carbon, it’s necessary to adjust the approach; haha, it seems to be related to gas concentration and composition. I’ve encountered situations where the activated carbon became saturated in a very short time. It’s recommended to consult suppliers who have dealt with similar gases for more direct advice
I have conducted experiments on the catalytic deactivation process; the specific surface area of the catalyst becomes clogged, and there are pressure differences between the upper and lower layers, ranging from 20 to 100 Pa. Blowing and ash removal operations are carried out based on changes in differential pressure. Similarly, once the activated carbon becomes saturated with adsorbate, its specific surface area will change, and as a result the differential pressure will also change. The exact amount of change in pressure in pascals will need to be determined through process experimentation.