VOCs exhaust gas treatment consultation Xiamen catalytic combustion

Description :

　　After the solid surface adsorbs the adsorbate, a portion of the adsorbed adsorbate can detach from the adsorbent surface, which is now attached. After a period of adsorption, due to the concentration of surface adsorbates, their adsorption capacity significantly decreases and the requirements for adsorption purification are met. At this time, certain measures need to be taken to desorb the adsorbates already adsorbed on the adsorbent to enhance its adsorption capacity. This process is called adsorbent regeneration. Therefore, in practical adsorption engineering, it is the cycle of adsorption regeneration and repeated adsorption that is used to remove pollutants from the exhaust gas and recover useful components from the exhaust gas.

　　Catalytic combustion is a purification method that uses catalysts to oxidize and decompose combustible substances in exhaust gas at lower temperatures. So, catalytic combustion is also known as catalytic chemical conversion. Due to the acceleration of the oxidation decomposition process by the catalyst, most hydrocarbons can be completely oxidized by the catalyst at temperatures of 300-450 ℃.

　　Compared with the thermal combustion method, catalytic combustion requires less auxiliary fuel, consumes less energy, and has smaller equipment and facilities. However, the promotion and application of this method in industrial production processes have been affected by issues such as catalyst poisoning, replacement of catalytic beds, and high cleaning costs.

　　RCO， It refers to the regenerative catalytic combustion method, which decomposes VOCs into CO2 and H2O under low temperature conditions ranging from 100 to 400 degrees Celsius under the action of a catalyst. It is one of the effective means of purifying hydrocarbon waste gas and eliminating odors. RCO is a new catalytic technology that has the characteristics of RTO energy recovery and low-temperature operation of catalytic reactions. The catalyst is placed on top of the thermal storage material to achieve purification standards, and its heat recovery rate is as high as 95%. The key to the excellent performance of RCO systems is the use of dedicated precious metal or transition metal catalysts impregnated on saddle shaped or honeycomb shaped ceramics, where oxidation occurs at low temperatures of 250 to 5 degrees Celsius, reducing fuel consumption and equipment costs. Nowadays, some countries have started using RCO technology to replace CO for the purification of organic waste gas, and many RTO equipment have also begun to convert to RCO, which can reduce operating costs by 33% -50%. After the reaction, harmful HC compounds are converted into CO2 and H2O, thereby enabling pollution control.

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