Preparation And Research Of New-type ZnO-based Compound Desulfurizer

Desulfurizer is used widely in such area as chemical industry, petrochemical industry, oil refining, metallurgy, environment maintaining, et al. Desulfurized technology has been always crucial to petrochemical industry. In petrochemical industry, above 80 percent of producing process is related to desulrurization. With exploying and application of high activity catalyzer, desulfurized technology is under higher press. As the core of the desulfurized technology, exploying of desulfurizer is of very important meaning. In diversities of dry desulfurizers, zinc oxide has many strongpoints such as high precision of desulrurization, steady and convenient operating, high capacity of desulrurization, et al.In this article, A kind of ZnO-based desulfurizer which was applied to low-temperature(200-350) process was studied. In this desulfurizer, zinc oxide is primary active component and manganese oxide and copper oxide was intermingled as compound acclerant in order to improve capacity of desulfurizing. Through experiment, Technological process of preparation desulfurizer is determined. Consequently, capacity of desulfurizing is studied.In the process of experimentation, preparation method of anterior product of desulfurizer was studied and the method of chemical deposition was determined. In the process of deposition, the technology of super-disperse was applied and anterior product of desulfurizer which was prepared is of nano-size. In order to solidify the desulfurizer powder, cement was applied as carrier. Through experimentation, the content of cement was ascertained and desulfurizer's rigidity was improved effectively. At last, after 2 hours calcination under 350 centigrade, final product was obtained.In order to improve desulfurized activity, the proportion of Mn2+ and Cu2+ was studied and an orthogonal experiment was designed. By orthogonal experimental design, Zn2+:Mn2+:Cu2"l"=72.5:18.1:9.4 was selected originally as preferable proportion and 280 centigrade was confirmed as better operating temperature at the same time. Subsequently, through furthermore study, Zn2+:Mn2+:Cu2+=72.5:18.1:9.4 was considered as the best proportion. And then, appropriate content of cenment was studied and the result that twenty percent of cement is proper was acquired. At last, the influence of operating temperature to desulfurized activity was researched and 280 centigrade was determined as thebest operating temperature.By testing desulfurized activity, the desulfurizer's best desulfurizing capacity is 25.2 percent under the best condition.In addition, the influence of La2O3 to the desulfurizer was studied. As the result showed, suitable la2O3 can improve its desulfurizing capacity.Based on above research, the best preparation technology and the best operating temperature was determined. By testing desulfurized activity, as the result showed, in low-temperature (200-350 ), the desulfurizer shows excellent behavior for removal of fyS which contained in gas. It was proved that the desulfurizer has excellent desulfurizing capacity and expansive applying future.