Membrane permeation of a binary compound for co-current and cross flow modes

Basu, Biswadeep; Visvanathan, C.

doi:10.1016/s0011-9164(00)00079-5

Cited by 1 publication

(1 citation statement)

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“…Figure also shows that in the studied concentration range, the PDMS membrane expresses better separation performance than that observed in distillation and when using the POMS membrane reported by Lux et al This is because in the PV process, the separation mechanism follows a solution‐diffusion model, and the transport is obviously solubility dominated in the separation of larger molecules from the smaller ones . Therefore, a greater difference in the adsorption amount of the separated species suggests better separation performance.…”

Section: Resultsmentioning

confidence: 49%

Pervaporative separation of methyl acetate–methanol azeotropic mixture using high‐performance polydimethylsiloxane/ceramic composite membrane

Zong

Zhou

et al. 2019

Asia-Pacific J Chem Eng

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Methyl acetate is a very important green solvent, which is often produced by esterification using excess methanol as one of the reagents. Therefore, costefficient separation of the methyl acetate/methanol mixture is important. However, the formation of a methanol/methyl acetate azeotrope at atmospheric pressure results in high energy consumption for their separation using distillation such as extractive distillation. In order to reduce the energy consumption, pervaporation (PV) was used to replace the distillation in this study. Two membranes, polydimethylsiloxane and polyoctylmethylsiloxane, were first compared in the PV separation of the methyl acetate/methanol mixture. Then the effects of different operating parameters such as temperature, feed flow rate, permeate pressure, and so on were investigated. Total flux was up to 100 kg/(m 2 ·hr) at 50°C, whereas the separation factor ranges from 1.2 to 5.0.Results showed that the methyl acetate/methanol azeotrope could be broken in the studied concentration range and high flux could be obtained. Furthermore, the change of activation energy with feed methyl acetate concentration and membrane thickness with temperature was investigated. To demonstrate the potential of the industrial applications, the stability in separation of 32 wt.% methyl acetate-methanol mixtures for 15 days was investigated. ORCIDWanqin Jin https://orcid.org/0000-0001-8103-4883 FIGURE 15 Membrane stability in the PV of 32 wt.% methyl acetate-methanol mixture at 25°C FIGURE 14Effects of downstream pressure on separation factor and total flux at 20°C and a fixed flow rate of 1,000 ml/min 10 of 12 LI ET AL.

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Section: Resultsmentioning

confidence: 49%