Macroscopic And Microscopic Study Of Liquid Flow Behavior On The Sheet Of Structured Corrugation Si C Foam Packing

Structured Corrugation SiC Foam Packing(SCFP-SiC),combining the advantages of the corrugation packing and the solid open-cell material,has greater anti-corrosive ability and higher mass transfer efficiency.SCFP-SiC has been applied in highlydemanding separation and purification of strong corrosive system to intensify the process to reduce cost.Knowing the intensification mechanism of SCFP-SiC can broaden its application,guide the design of novel structured packing and achieve an optimal operation for the column equipped with SCFP-SiC.Liquid renewal process on the sheet of SCFP-SiC was studied by visual method,and the quantification was determined by image analysis.The renewal process can be categorized into two stages according the difference of renewal rate,and through corresponding images the behind flow behavior was recognized.Moreover,the effects of liquid flow rate,viscosity and surface tension on the renewal rate were studied.The results reveal that liquid flow rate is the most prominent factor among them,and the findings can broaden the application of SCFP-SiC and provide principles for operation optimization of SCFP-SiC packed column.The pulse-response method was used to obtain the residence time distribution,to which the analytical solution of a two dimensional advection-diffusion model was fitted to get the axial and radial dispersion coefficients providing basic parameters for column design.It was found SCFP-SiC preserves better liquid dispersing ability compared to KATAPAK-S,indicating the application of SCFP-SiC in reactive distillation is very promising with the development of catalyst coating technologyLiquid flow behavior on pores of SCFP-SiC was qualitively studied by a high-speed camera coupled with a micro lens,whose location,flow direction and axis orientation were obtained.In summary,the high mass transfer efficiency of SCFP-SiC is partly due to the unique liquid flow and renewal behavior,which were validated experimentally.The superior liquid dispersion ability of SCFP-SiC coupled with the maturing catalyst coating technology is making it become the next generation of reactive distillation packing possible.The vortex in the pores of SCFP-SiC,which may promote liquid mixing and renewal is a strong candidate explaining its superb mass transfer ability from microscopic stand.