19 research outputs found
CHROMATOGRAPHIC SEPARATION OF VERAPAMIL RACEMATE USING A VARICOL CONTINUOUS MULTICOLUMN PROCESS
Compositional changes of sub-20-nm Er-doped phase-separated nanoparticles in silicates
International audienc
Direct observations of compositional changes of sub-20-nm Er-doped phase-separated nanoparticles in optical fibers
International audienc
Continuous chromatographic processes with a small number of columns: Comparison of simulated moving bed with Varicol, PowerFeed, and ModiCon
Measurements of absolute L- and M-subshell x-ray production cross sections of Pb by electron impact
Effective generation of characteristic K-rays from large laser-excited SF6 clusters in the presence of an Ar carrier gas
Simulation assessment of continuous simulating moving bed chromatography process with partial feed and new strategy with partial feed
Partial Feed simulating moving bed (SMB) has proved to be more efficient in binary separation performance (purity, recovery, productivity) because of its two additional degrees of freedom, namely feed length and feed time, as compared to classical SMB process. The binary separation of dextran T6 and fructose with linear isotherm is modeled with Aspen Chromatography simulator in a four zone SMB with one column per zone for both normal-feed and Partial Feed. Increase in number of feed length and feed time in the cycle plays a very important role in the separation performance with Partial Feed. In addition, the effect of mode of operation (early or late introduction of increase in number of feed length in the cycle) on product purity and recovery is also investigated. Furthermore, the binary separation system is designed with the safety margin method and the optimum operating parameters for simulation are calculated with triangle theory. Finally, a new strategy with Partial Feed is developed, showing improved separation performance relative to the basic four-zone SMB with regard to extract stream purity and recovery. The results of the proposed study can served as a useful summary of Partial Feed operation