Microwave Desorption Mechanism and Microwave Effect based on SO2 Chemical Dissociation and Mass Transfer of Basic Aluminium Sulfate Desulfurization Rich Liquid

A microwave liquid-phase desorption technique for enhancing mass transfer with chemical dissociation had been proposed for the first time. In this paper, the static desorption system of basic aluminium sulfate...

Sulfur Dioxide Was Carried out by Activated Carbon Adsorption in Combination with Microwave Desorption in Scene

The desulfurization of low-concentration sulfur dioxide in laboratory simulated flue gas and on-site metallurgical flue gas was carried out by activated carbon adsorption in combination with microwave desorption. In comparison with the results of desulfurization, the effect of gas impurities in on-site metallurgical flue gas on the performance of activated carbon adsorption and microwave desorption, as well as the consumption of activated carbon during the desorption process, was also studied. The results show that the gas impurities decrease the unit adsorption capacity by 28.73mg/g and increase the consumption of activated carbon by 0.25g, thus go against the adsorption of activated carbon. Moreover, the use of on-site flue gas as microwave carrier gas in the desorption process can benefit the accumulation of medium-or high-concentration SO2 from the desorption process which can be used to produce acids.

Study on Microwave Desorption Azeotropic Distillation of Ethanol-Loaded Activated Carbon under Vacuum Condition

The microwave desorption azeotropic distillation was used to recover ethanol in waste water from ethanol industry under vacuum condition. The flow charts for microwave desorption azeotropic distillation of ethanol-loaded activated carbon under vacuum condition were designed. Activated carbon is used in adsorption of low concentration ethanol in water, and the saturated carbon is regenerated by microwave irradiation under vacuum condition. The results showed that the ethanol-loaded activated carbon can be desorbed nearly completely after 100s; the microwave power has an important effect on the outlet concentration curve of ethanol; the mass defect of the regenerated carbon is lower than 5%. After several processes of activated carbon adsorption and microwave desorption azeotropic distillation under vacuum condition, the concentration of ethanol can come up to 98%.

Study on “Vacuum Migration” of the Desorption of Ethanol-Loaded Activated Carbon by Microwave Irradiation

The utilized ethanol in waste water from ethanol industry may be recovered through activated carbon adsorption and microwave desorption of the ethanol-loaded activated carbon. The flow charts for microwave desorption of ethanol-loaded activated carbon under N2 condition and vacuum condition are designed respectively. The institute parts of the desorbed vapors change when the tests are taken under vacuum condition and the system pressure affects the separation effect obviously. The quantity of ethanol in the vapors will increase when the system pressure is reduced, and this law is still right in the case of taking microwave as the heat source. The experimental results show that the ethanol-loaded activated carbon can be desorbed nearly completely after 100s when the microwave power is not weaker than 320W. After three processes of activated carbon adsorption and microwave desorption under vacuum condition, the concentration of ethanol can come up to over than 97%～98% from 4%～8%. The separation effect of microwave desorption can be enhanced when it is combined with the method of vacuum desorption. This law will be significant for the treatment of wastewater containing organic matter from industry using microwave desorption technology.

Catalytic Oxidation of Toluene over CuyMnzOx/γ-Al2O3 Catalysts

Experimental investigations using granular activated carbon (GAC) adsorption and then desorpted with microwave irradiation for toluene abatement are reported in this paper. The results indicated that For different kinds of catalysts, Cu0.33Mn0.67Ox/γ-Al2O3 had the highest catalytic activity. For toluene combustion, the temperature required for 99% toluene conversion was lower than 300°C. In combination process of microwave desorption with catalytic combustion, the toluene conversion was ranged from 92% to 99% and the optimum volume flow rate ratio of carrier and air was 1:1.