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- 저자 : Naixin Wang (검색결과 2 건)
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Calcination of layered double hydroxide membrane with enhanced nanofiltration performance
Zheng Huang,Naixin Wang,Xiaoting Li,Quan-Fu An 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.89 No.-
Two-dimensional layered double hydroxides (LDH) as a membrane material has tremendous potential inthe water treatmentfield. However, the stability and permeance of the LDH membrane should be furtherimproved for the industrial application. In this study, the LDH separation layer was in situ grown on thetubular Al2O3 substrate. The obtained LDH composite membrane was then calcined to reduce the surfacefree energy and remove some interlayer anions. Therefore, the calcined LDH composite membraneexhibited enhanced stability and permeance for removing dye molecules from water. The permeance ofthe calcined LDH membrane reached 367 L m 2 h 1MPa 1 and the rejection for Eriochrome black T wasstill above 99%. Moreover, the membrane can maintain the separation performance more than 110 h inthe nanofiltration process. The morphologies and structures of the LDH membranes before and aftercalcination were also investigated. The results indicated that this facile method is effective to improve theseparation performance of the LDH membrane.
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Wei Zhang,Shulan Ji,Naixin Wang,Jiding Li 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.27 No.-
In this work, the solution and diffusion properties of n-heptane, thiophene, 2-methylthiophene, 2,5-dimethylthiophene, ethyl sulfide, butyl mercaptan in poly[bis(phenoxy)phosphazene] (PBPP) werestudied by inverse gas chromatography. The infinite dilute activity coefficients and diffusion coefficientswere determined. Effects of temperatures and solvent species on the activity coefficients and diffusioncoefficients were investigated. The results showed that higher temperature was beneficial for bothsolution and diffusion process. Compared with pervaporation desulfurization performance in ourprevious work, the order of infinite dilute diffusion coefficients was in agreement with that of partialflux, which indicated that diffusion decided the permeability within solution–diffusion model.
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