Production of dehydrated fuel ethanol by pressure swing adsorption process in the pilot plant

Jeong, Jun-Seong; Jang, Byung-Uk; Kim, Youngran; Chung, Bong-Woo; Choi, Gi-Wook

doi:10.1007/s11814-009-0226-3

Cited by 19 publications

(9 citation statements)

References 17 publications

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“…Several research projects have been conducted using molecular sieves zeolites (Jeong et al, 2009;Pruksathorn and Vitidsant 2009;Simo et al, 2009;Carmo and Gubulin 2002) and biobased adsorbents (Boonfung and Rattanaphanee 2010;Beery et al, 1998) in PSA processes to dehydrate ethanol. For example, Simo and his co-workers (Simo et al, 2009) As it can be seen from Figure 2.1, water and ethanol is mixed with nitrogen gas (carrier gas) in the CEM (control-evaporation-mixing) unit, which is a vapor generating system.…”

Section: Pressure Swing Adsorption For Ethanol Dehydrationmentioning

confidence: 99%

“…There are a number of adsorbents that can be employed to dry ethanol: zeolite (Jeong et al, 2009;Simo et al, 2009), silica gel, activated alumina, cassava (Boonfung and Rattanaphanee 2010;Liu et al, 2010;Quintero and Cardona 2009), cornmeal (Chang et al, 2006b;Hu and Xie 2001;Vareli et al, 1998), wood chips (Boonfung and Rattanaphanee 2010;Benson and George 2005), potato starch (Hu and Xie 2001), natural corncobs, natural and activated palm stone, oak (Al-Asheh et al, 2004). Among these adsorbents, 3A zeolite and corn grit are currently used in ethanol plants to dry ethanol (Kim et al, 2011;Simo et al, 2009).…”

Section: Adsorbentsmentioning

confidence: 99%

“…They reported that higher cycle time resulted in higher ethanol recovery. Jeong et al, (2009) used zeolite in their experiments and reported a production of about 2 kl/day of dehydrated ethanol (99.5 wt% EtOH) with a product recovery of 72% at feed concentration of 93.2 wt% EtOH.…”

Section: Zeolitementioning

confidence: 99%

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Ethanol Dehydration in a Pressure Swing Adsorption Process Using Canola Meal

2013

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Canola meal was used as an adsorbent in a pressure swing adsorption (PSA) apparatus for ethanol dehydration. The experiments were conducted at different pressures, temperatures, vapor superficial velocities, vapor concentrations and particle sizes. Adsorption experiments were performed at equilibrium and breakthrough points. The results demonstrated that canola meal can break the azeotropic point 95.6 wt% and produce over 99 wt% ethanol. At elevated temperature, feed water concentration, and vapor superficial velocity, it was found that the mass transfer rate increased. In addition, the mass transfer rate decreases when either the total pressure or the size of the adsorbent particles are increased. Breakthrough curves were simulated and the overall mass transfer resistance was evaluated at all experimental runs. The internal mass transfer resistance was identified as the relevant mass transfer mechanism.For canola meal, the equilibrium water/ethanol uptake was achieved at 100, 105, and 110˚C. The Frenkel-Halsey-Hill (FHH) and Guggenheim-Andrson-de-Boer (GAB) models perfectly simulated the water adsorption isotherms. By applying Dubinin-Polanyi model to the experimental data, canola meal was identified as a large pore (non-porous) material.The heat of adsorption on canola meal with particle size of 0.43-1.18 mm was determined to be -32.11 kJ/mol. The result confirms that the adsorption process is an exothermic phenomenon and is of physical type due to the fact that the value obtained as the heat of adsorption is negative and its magnitude is within the range 20-80 kJ/mol. The equilibrium water uptake on canola meal was similar to that reported for other starchy and cellulosic adsorbents, while the ethanol uptake was higher.Water saturated canola meal was successfully regenerated by passing nitrogen at 110˚C which is lower than that for molecular sieves commonly used in industry for bioethanol dehydration. The canola meal bio-adsorbent was re-used for more than 32 cycles and no significant change in adsorption capacity was observed.iii ACKNOWLEDGEMENTS

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Section: Pressure Swing Adsorption For Ethanol Dehydrationmentioning

confidence: 99%

Section: Adsorbentsmentioning

confidence: 99%

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Ethanol Dehydration in a Pressure Swing Adsorption Process Using Canola Meal

2013

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“…These results clearly show that 3 Å molecular sieve has the highest absorption capacity for water [3]. A number of researchers have studied the adsorption kinetics and pressure swing adsorption methods for dehydration of rectify-ing column ethanol to fuel grade ethanol [5,6,4,[7][8][9].…”

Section: Dehydration Of Ethanol Using Zeolite Molecular Sievesmentioning

confidence: 99%

Дегидратация Биоэтанола (Топливного Этанола)

Bojko¹,

Bondar²,

Kuc³

2018

НВвБ

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“…Distillation, a separation technology based on boiling point difference, cannot be used anymore to enhance bioethanol concentration of >95%. Several methods have been proposed for the dehydration of bioethanol including molecular sieve adsorption system [1,2] and entrainer distillation [3][4][5]. Both of these technologies in principle can increase the bioethanol purity, but the complexity and high operating costs hinder the industrial scale applications.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Zeolite Membrane for Bioethanol Purification

Purbasari

Istirokhatun

Kusumayanti

et al. 2013

Bull. Chem. React. Eng. Catal.

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The use of bioethanol as an alternative fuel with a purity of more than 99.5% wt has prompted research on bioethanol purification. One of the promising methods used for bioethanol purification is pervaporation membrane. This research is aimed to prepare and characterize zeolite membranes for pervaporation membrane. The membrane preparation consisted of two stages, namely support preparation and zeolite deposition on the support. In support preparation, α- alumina and kaolin with specific composition (50:30; 40:40; 50:30) was mixed with additives and water. After pugging and aging process, the mixture became paste and extruded into tubular shape. The tube was then calcined at temperature of 1250 °C for 3 hours. After that, zeolite 4A was deposited on the tubes using clear solution made of 10 %wt zeolite and 90 %wt water and heated at temperature of 80 °C for 3 hours. Furthermore, the resulting zeolite membranes was washed with deionized water for 5 minutes and dried in oven at temperature of 100 °C for 24 hours. Characterization of zeolite membranes included mechanical strength test, XRD, and SEM. In the mechanical strength test, the membrane sample with α- alumina:kaolin = 50:30 (membrane A) has the highest mechanical strength of 46.65 N/mm2. Result of XRD analysis for the membrane A indicated that mullite and corundum phases were formed, which mullite phase was more dominant. Meanwhile the result of SEM analysis shows that zeolite crystals have been formed and covered the pores support, but the deposition of zeolite has not been optimal yet. The performance examination for bioethanol purification showed that the membrane could increase the purity of bioethanol from 95% to 98.5% wt. © 2013 BCREC UNDIP. All rights reserve

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Production of dehydrated fuel ethanol by pressure swing adsorption process in the pilot plant

Cited by 19 publications

References 17 publications

Ethanol Dehydration in a Pressure Swing Adsorption Process Using Canola Meal

Ethanol Dehydration in a Pressure Swing Adsorption Process Using Canola Meal

Дегидратация Биоэтанола (Топливного Этанола)

Preparation and Characterization of Zeolite Membrane for Bioethanol Purification

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