Study On Preparation Of Nano Copper Based Composite Materials And Its Performance Of Desulfurization And Regeneration

Considering the characteristics of odor in sewage treatment plant, it is necessaryto develop a cheap material to remove odor at room temperature. In order to improvethe activity of the desulfurizing agent need to reduce size of desulfurizer anddevelopment costs，so it is vital significant to research nano-CuO base desulfurizerwith highly active.Nano-CuO based composite doped by elements was prepared bydirect-precipitation to research the relationship between structure and desulfurizationperformance. Study shows that nano-CuO prepared by single-element doping canraise the desulfurization activity,while the active doped by iron (cobalt or cerium)slightly better than zinc. The nano-CuO based composite doped by double-elementprepared under optimal conditions of atomic ratio of Fe/Zn/Cu is2:1:25(Co/Ce/Cu is3:3:50) for direct precipitation exhibits the best desulfurization performance with aH2S breakthrough time of400min(540min) and have a better removal effect formethyl mercaptan. X-ray diffraction (XRD), transmission electron microscopy(TEM), X-ray photoelectron spectroscopy (XPS) and other characterization meanswere adopted to analyze the structure of nano-CuO based composite doped byelements, it shows that the main body of material composition is still nano-CuO;XPS fitting data showes out Cu2+δand Cu2+exited in material surface and the molarratio of Cu2+δ/Cu2+has obvious positive correlation with desulfurizer activity. Alongwith the increase of molar ratio of Cu2+δ/Cu2+, material surface can form moreoxygen vacancy is beneficial to the combination of sulphur in H2S with copper andthe desulfurization activity.To research the forming nano-CuO matrix composite and the regenerationperformance, in this paper, the forming binde were choiced and the regeneration experiments were carried out. After molding, result show that the active componentsof desulfurizer is still of copper oxide, the mechanical strength of the formingdesulfurizer increased and the specific surface area and pore volume has reducedsignificantly with the penetration is240min. It also has the potential industrialapplications,because regeneration experiments of molding-desulfurizer in hydrogensulfide can be four times regeneration with the breakthrough time can be up to500min, at the same time also has the capability of adsorption of sulfur fetor.