Kinetic and Thermodynamic Study on the Liquid Phase Adsorption by Starchy Materials in the Alcohol-Water System

Carmo, María Auxiliadora Vieira do; Adeodato, M.G.; Moreira, Allyne Marie Molina; Parente, Evandro; Vieira, Melissa Gurgel Adeodato

doi:10.1023/b:adso.0000046357.86218.16

Cited by 24 publications

(14 citation statements)

References 7 publications

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“…The effects of the adsorption temperature on the adsorption capacity for the oat hull based biosorbent was discussed in a previous study . The comprehensive conclusion is consistent with that of the previous work that increase of temperature caused the increase in adsorption rate, though it decreased the adsorption capacity at equilibrium …”

Section: Resultssupporting

confidence: 86%

See 1 more Smart Citation

Dynamics of Water Adsorption from Butanol–Water Vapor in a Biosorbent Packed Column

Huang

Dalai

Park

et al. 2019

Ind. Eng. Chem. Res.

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Drying is essential in the production of biobutanol. In this work, the dynamics of water adsorption from butanol–water vapor mixtures in a fixed bed column were investigated. The biosorbent used in this system was derived from a cellulosic material oat hull. Water adsorption breakthrough curves obtained from the biosorbent packed column were simulated by the Bohart–Adams model and Klinkenberg model. The Klinkenberg model provided a better simulation of the experimental data in comparison with the Bohart–Adams model. The mass transfer coefficient and mass transfer resistances were investigated from the modeling results. The results indicated that the rate of water adsorption was controlled by internal mass transfer resistance. The water adsorption on the biosorbent was visualized with the aid of microscope imaging. This study reveals that water saturated oat hull based biosorbent was regenerated and reused successfully.

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Section: Resultssupporting

confidence: 86%

“…21 The comprehensive conclusion is consistent with that of the previous work that increase of temperature caused the increase in adsorption rate, though it decreased the adsorption capacity at equilibrium. 47 4.4. Simulation of Breakthrough Curves for Different Feed Concentrations.…”

Section: Methodsmentioning

confidence: 99%

Dynamics of Water Adsorption from Butanol–Water Vapor in a Biosorbent Packed Column

Huang

Dalai

Park

et al. 2019

Ind. Eng. Chem. Res.

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show abstract

“…The concentration of the adsorbed phase was obtained by a simple mas balance, which considered alcohol as the nonadsorbable component, according to Equation ():

q_{(t)} = \frac{M_{f}}{M_{S}} ([], \frac{W_{b (t)} - W_{b}^{0}}{W_{b ((), t)}})

…”

Section: Methodsmentioning

confidence: 99%

Preparation and characterization of cassava starch‐based adsorbents for separating of azeotropic ethanol‐water in biofuels ethanol production

Liu

Gao

et al. 2015

J of Chemical Tech & Biotech

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BACKGROUND: Dehydration of biomass-based fermentation product is an essential process in the production of biofuels ethanol for industrial applications. Cassava starch, an adsorbent with high efficiency, can be fermented after saturating with water, which overcomes the shortcomings of high energy consumption bioethanol production. Therefore, the aim of the present study was to prepare cassava starch-based adsorbents with high adsorption efficiency that do not affect fermentative production.

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“…Reducing CO 2 emissions has evidently become one of the most important challenges of our time, and seeking for green energy alternatives has drawn considerable attention in both industry and academia. Ethanol, one of the fossil fuel alternatives, can be produced from renewable biomass via fermentation, but its production involves energy-intensive distillation to separate ethanol from dilute fermentation broth (∼10 wt % ethanol). , While siliceous zeolites have been demonstrated to effectively extract ethanol via adsorption owing to their hydrophobic nature, − the adsorbent regeneration remains difficult. , Membrane-based processes, particularly via pervaporation, also hold great promise for this particular application with a high solute concentration in the feed. Mixed matrix silicalite membranes with a high separation factor (i.e., ratio of the ethanol concentration in the permeate to that in the feed) of >50 have been achieved experimentally and reported in the literature ,− However, the low flux of zeolite membranes (on the order of a few kg/m 2 h) remains as a key limitation. − Different from traditional zeolite membranes, the nanoscale diffusion path of zeolite nanosheets − coupled with their hydrophobic nature may address the flux limitation.…”

Section: Introductionmentioning

confidence: 99%

Potential and Design of Zeolite Nanosheets as Pervaporation Membranes for Ethanol Extraction

Zou

Lin

2020

Ind. Eng. Chem. Res.

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To facilitate the production of ethanol from renewable biomass to meet the increasing energy demand with reduced CO 2 emissions, molecular simulations are employed to investigate zeolite nanosheets as pervaporation membranes for ethanol extraction with atomic-level understandings. More than 10 zeolite nanosheets with diverse geometric features are systematically studied. All of these studied zeolite nanosheets are computed to offer unprecedentedly large fluxes, with values correlating to the density and size of their permeation channels. Interestingly, our results also show that the separation factor of nanosheets can drastically vary from as promising as 440 to as poor as 6.7. A detailed investigation reveals that the separation factor strongly depends on the product of the adsorption selectivity in bulk zeolites and the ethanol fraction at the channel entrance on the surface. A selection guideline based on the geometric features of zeolites is also proposed; promising nanosheet candidates appear to have the largest cavity diameter of approximately 6 Å as well as a small product value between the number of silanols surrounding the channel opening and the largest opening diameter of permeation channels on the surface. The outcomes of this work can help guide the selection of zeolite nanosheets, based on the adsorption properties and/or geometric features, toward the future development of novel membranes for ethanol extraction.

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Kinetic and Thermodynamic Study on the Liquid Phase Adsorption by Starchy Materials in the Alcohol-Water System

Cited by 24 publications

References 7 publications

Dynamics of Water Adsorption from Butanol–Water Vapor in a Biosorbent Packed Column

Dynamics of Water Adsorption from Butanol–Water Vapor in a Biosorbent Packed Column

Preparation and characterization of cassava starch‐based adsorbents for separating of azeotropic ethanol‐water in biofuels ethanol production

Potential and Design of Zeolite Nanosheets as Pervaporation Membranes for Ethanol Extraction

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