Filtration Behavior Of Nano-sized Nickel Particles Using Plate Ceramic Membranes

In order to implement continuous industrial application of coupling nanocatalysis and membrane separation technology, enrich the theory and method of design of application-oriented ceramic membrane materials, this thesis used the plate ceramic symmetric membrane to separate the nano-sized nickel from liquid. The research work was carried out from three aspects in this dissertation:Firstly, the relationship between membrane microstructure parameters and macroscopic performance of the ceramic membrane was investigated. Through fitting ceramic membrane's microstructure parameters (pore size, thickness of membrane and so on) and the pure water flux(PWF), we found that for the porous ceramic membranes prepared with state particle sintering method(SPSM), the modified Kozeny-Carman(K-C) equation can reflect the correlation between the membrane permeability and membrane microstructure parameters more accurately. The predicted value from the Hagen-Poiseuille(H-P) equation which simply abstracted ceramic membrane pores into capillary beams has greater deviation with the experimental value.Secondly, the static adsorption and dynamic deposition behavior of nano-sized nickel on the surface of the plate ceramic symmetric membrane were investigated. The experiments about the effect of the concentration of nano-sized nickel suspension, temperature, operating time and pore size of membrane on the nano-sized nickel adsorption were carried out; meanwhile the static adsorption and dynamic deposition data were measured. The results indicated that the static adsorption isotherm of nano-sized nickel accords with Langmuir isothermal adsorption model and with increasing time and feed concentration, the adsorption increased rapidly in the first few minutes, then rose slowly and tended towards stability. The adsorption of nano-sized nickel increased with the membrane pore size and decreased with the temperature. In the cross-flow filtration process, the deposition of nano-sized nickel increased rapidly with feed concentration and time, which made steady flux decrease quickly. For the different pore size of membrane, there was an optimum pore size in range of 0.1~1.5μm in the filtration of nano-sized nickel suspension, which made the permeate flux maximum. Therefore the plate ceramic membranes with pore size of...