화학공학소재연구정보센터
Chemical Engineering and Processing, Vol.126, 23-37, 2018
A simplified strategy to reduce the desorbent consumption and equipment installed in a three-zone simulated moving bed process for the separation of glucose and fructose
The operating strategy of the three-zone simulated moving bed aiming for decreasing the desorbent consumption and the numbers of pump for the separation of glucose and fructose was proposed. Its principle was based on the port-relocation and port-closing/opening technique. The proposed strategy called PR-PCO-NFZIII was the rearrangement of the outlet port such that the raffinate and extract were alternately collected with no flow in zone III during raffinate collecting period. The adsorption model was first verified with experiments in the three-zone simulated moving bed operational mode (TZ-SMB). Then the model was used in the simulation of PR-PCO-NFZIII. The calculated performance parameters of the TZ-SMB, port-relocation, and PR-PCO-NFZIII were compared. The results revealed that PR-PCO-NFZIII outperformed the TZ-SMB mode in terms of solvent consumption, reduced number of pumps, and pressure drop. With this simplified approach, the purities and productivides of both extract and raffinate product were not compromised with adjustable product concentration as a function of extract collecting time to suit the specific demand. Furthermore, with the suitable choice of partial collecting/discarding strategy, the extract and raffinate were greatly concentrated.