A two-stage blade-packing rotating packed bed for intensification of continuous distillation

A two-stage blade-packing rotating packed bed(TSBP-RPB) was designed and developed for the intensification of continuous distillation. The mass transfer parameters of the TSBP-RPB were investigated using a chemisorption system. Continuous distillation experiments were conducted in the TSBP-RPB by the methanol–water binary system. Experimental results showed that values of the effective interfacial area and liquid-side mass transfer coefficient of the TSBP-RPB were 93–337 m^2·m^(-3) and 0.05–0.19 cm·s^(-1), respectively. The height of equivalent theoretical plate(HETP) of the TSBP-RPB ranged from 1.9 to 10 cm. Moreover, the TSBP-RPB is easy to be manufactured, which shows great potential for the application of continuous distillation.

An efficient method for enhancing adhesion and uniformity of Al_(2)O_(3) coatings on nickel micro-foam used in micropacked beds

Methods of coating Al_(2)O_(3) on nickel micro-foam were compared and screened,aiming to overcome the capillary force and prepare the micro-foam monolithic catalyst coatings.The surface of micro-foam substrate was pretreated by a chemical etching method to improve the adhesion of the coatings on the substrate.The results showed that the slurry circulation at 162 ml·min^(-1) was evaluated as the optimal method.The pore size on the substrate surface can be controlled by changing the pretreatment conditions.An empirical correlation was also proposed,showing an excellent practicality for predicting the pore size.The adhesion of the coatings with substrate pretreatment was significantly better than that without substrate pretreatment.The minimum value of mass loss after ultrasonic vibration was 3.9%.This mainly attributes to the squeezing of Al_(2)O_(3) particles in the pores of substrate surface.The coatings on nickel micro-foam are hopefully used in micropacked beds for catalytic reactions.

Microreactor platform for continuous synthesis of electronic doped quantum dots

Electronic doped quantum dots(Ed-QDs),by heterovalent cations doping,have held promise for future device concepts in optoelectronic and spin-based technologies due to their broadband Stokes-shifted luminescence,enhanced electrical transport and tailored magnetic behavior.Considering their scale-up requirement and the low yielding of several current colloidal synthesis methods,a stable and efficient bulk synthesis strategy must be developed.Microreactors have long been recognized as an effective platform for producing nanomaterials and fabricating large-scale structures.Here,we chose microreactor platform for continuous synthesis of Ed-QDs in the air at low temperatures.By original reverse cation exchange reaction mechanism together with varying the kinetic conditions of microreactor platform,such as liquid flow rate,the Ag doped CdS(CdS:Ag)Ed-QDs with higher yield have been synthesized successfully due to the continuous synthesis advantages with a high degree of size selectivity.Enabled by microreactor engineering simulation,this research not only provides a new synthetic method towards scale-up production but also enables to improve chemical mass production of similar functional QDs for optical devices,bioimaging and innovative information processing applications.