For reactive distillation (RD) process limited by the separation efficiency of gas–liquid mass transfer, if the physical size of the alternating operation in reaction and separation can be further reduced, it would greatly promote the efficiency of the RD process. For this purpose, a structured HY@SiC catalytic packing was developed in which the gas–liquid mass transfer separation process and the catalytic reaction occurred simultaneously on its surface. The HY@SiC catalytic packing was used in a pilot-scale column for experimental study on production of cyclohexyl acetate (CA) by RD to verify the performance of the catalytic packing for the first time. Furthermore, a RD model based on the HY@SiC catalytic packing was established based on the reaction kinetics of HY zeolite catalyst obtained in this work. Finally, a novel RD process with double recycle stream for CA production was proposed, which will be optimized design with TAC minimize as the optimization objective based on sequential iterative algorithm.
In reactive distillation processes constrained by the efficiency of vapor–liquid mass transfer, reducing the physical dimensions of simultaneous reaction and separation operations can significantly enhance overall process efficiency. To achieve this, HY@SiC, a structured catalytic packing was developed, allowing for concurrent catalytic reactions and vapor–liquid mass transfer on its surface. This innovative catalytic packing was employed in a pilot reactive distillation column to experimentally investigate the production of dimethyl maleate via reactive distillation, marking the first validation of its performance. Additionally, a reactive distillation model incorporating HY@SiC structured catalytic packing was established. Ultimately, a new double-column reactive distillation process for producing dimethyl maleate was proposed, with plans for optimization aimed at minimizing total annual cost, which was 4.08 × 10 5 $/y, utilizing a sequential iterative algorithm as the core focus for design improvements, while achieving DMM yield and purity levels of 99.42 % and 99.0 wt%, respectively.
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