Clean technology for acetone absorption and recovery

Márki, Edit; Lenti, B.; Vatai, Gyula; Békássy-Molnár, Erika

doi:10.1016/s1383-5866(00)00121-0

Cited by 10 publications

(5 citation statements)

References 4 publications

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“…The separation factor which describes the efficiency of the process varied in different ranges for different compounds (Table 3) as ethanol had 3-10 times higher values than n-butanol. Usually ethanol separation factor is lower (10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) in case of pervaporation [3]. The increased separation factor for ethanol can be explained by the presence of other compounds which as a coupling effect can modify the diffusivity as if they were alone [8].…”

Section: Resultsmentioning

confidence: 99%

Recovery of aroma compounds from model solution by pervaporation membrane

Hornyák

Hornyák-Holczman

Márki

et al. 2014

Per. Pol. Chem. Eng.

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The aim of our study was to examine applicability of pervaporation in reference to the apple aroma recovery and the effects of the operating parameters on the process. Based on performed experiments the pervaporation, as membrane process, may be capable to reduce the loss of aroma compounds in the beverages production, due to its low operating temperature and high aroma recovery efficiency so organoleptic characteristics of the products would satisfy the growing consumer expectations as well. The studied main aroma compounds were i-amyl-alcohol, ethanol, butanol, i-butanol, ethyl-acetate, which

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Section: Resultsmentioning

confidence: 99%

Recovery of aroma compounds from model solution by pervaporation membrane

Hornyák

Hornyák-Holczman

Márki

et al. 2014

Per. Pol. Chem. Eng.

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“…According to the dynamic programming, the pervaporation unit is involved in the subsequent step. The cost of the pervaporation unit consists of the capital cost and the operation costs considering heating and cooling, pumping, and vacuum cost [34]. The cost of the pervaporation related to annual basis should be summed up with the cost of distillation shown in Figure 10 but there can be two basic alternatives for consideration of the pervaporation: isothermal and adiabatic ones.…”

Section: Results Of the Rigorous Modelling And Optimizationmentioning

confidence: 99%

Rigorous modelling and optimization of hybrid separation processes based on pervaporation

2007

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Hybrid separation processes are becoming more and more important in the practice if membrane technologies are also involved. In this work, a systematic investigation is completed for three sequence alternatives of distillation and pervaporation. These are the following: pervaporation followed with distillation (PV+D), distillation followed with pervaporation (D+PV), two distillation columns and a pervaporation unit between them (D+PV+D). The hybrid separation process alternatives are evaluated with rigorous modelling tools, but first, a rigorous simulation algorithm is determined for the pervaporation. The three hybrid separation processes are rigorously modelled with CHEMCAD, and optimized with the dynamic programming optimization method for the case of the separation of ethanol-water mixture. The objective function is the total annual cost (TAC).The energy consumption is also investigated. The selection of the ethanol-water mixture has two motivations: (i) it is quite often studied and well known, and (ii) to make biofuel (ethanol) production more economical, membrane technologies might also be applied. The results are compared with each other and with the classical separation completed with heteroazeotropic distillation. The optimized TAC shows that the distillation column followed with pervaporation is the most economical hybrid separation process alternative. Its TAC is about 66% of that of the classical separation.

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“…3 and 4) results in K g a values as high as ∼7 for high fluids velocities and ∼2.5 for optimal conditions. Mârki et al [25] presented data on acetone absorption into water with use of 1 m high column filled with Sulzer Mellapak 250.Y. The removal efficiency was in the range ∼30-80% for superficial gas velocity ∼0.9-0.2 m s −1 .…”

Section: Discussionmentioning

confidence: 99%