Beschreibung:
To meet the requirements of efficient adsorption of atmospheric pollutant SO 2 and low energy consumption regeneration of adsorbent, biomass carbon materials modified by metal oxides were prepared under microwave heating and the effects such as microwave power, loading of iron oxides, and calcination time on the active carbon load with iron oxides (ACIO) were investigated. Through characterization by multiple methods, and simulation of the desulfurization process by DFT, the desulfurization mechanism of ACIO was explored. The results indicate that the optimum preparation conditions are: the loading amount of iron oxides is 10 wt.%, the microwave power is 500 W and the calcination time is 10 min. The adsorption capacity of ACIO corresponding to the optimum preparation conditions is 146.31mg/g, and the thermal conductivity is 0.58W/(m·K), which leading the regeneration energy consumption is reduced by about 2800J/g. Moreover, ACIO possess a good SO 2 cyclic adsorption-desorption performance, and the SO 2 adsorption capacity after 5 cycles of adsorption and desorption maintains at 46.98mg/g. The DFT calculation results indicate that chemical adsorption between SO 3 and Fe 2 O 3 under anhydrous conditions existed in the desulfurization process, contribute to the sulfate formation reaction of the two to form sulphate