Development of Automatic Adsorption Apparatus for Binary Mixture: Measurement of Individual Adsorption Isotherms of Ethanol and Water from Their Mixed Vapors by Active Carbon Fiber

Nakai, Kenta

doi:10.1006/jcis.2001.7561

Cited by 6 publications

(2 citation statements)

References 8 publications

(15 reference statements)

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“…Compared with distillation, membrane pervaporation saves energy, but this new method can be difficult to scale up for industrial-quantity production. Adsorption technologies , have also been reported to remove low levels of water from ethanol, − for example, dehydration with molecular sieves using zeolite 3A. The objective of this work is to compare selected biosorbentspotato starch, corn starch, cassava starch, and cellulosewith zeolite 3A in gas-phase and liquid-phase adsorption.…”

Section: Introductionmentioning

confidence: 99%

Equilibrium Isotherms of Water and Ethanol Vapors on Starch Sorbents and Zeolite 3A

et al. 2010

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An adsorption equilibrium apparatus (gravimetric method) was used to obtain the water vapor isotherms on zeolite 3A, potato starch, corn starch, cassava starch, and cellulose at room temperature. Experimental results show that at low relative pressure, P/P 0 = 0.6, the water−ethanol sorption ratio in potato starch was the highest at 64.2. The obtained sorption ratios from high to low are potato starch, cellulose, corn starch, cassava starch, and zeolite 3A. It was found that starch biosorbents are a better choice than zeolite 3A for the selective adsorption of water and ethanol. Several isotherm modelsLangmuir, modified Brunauer−Emmett−Teller (mod-BET), Halsey, Smith, Henderson, Oswin, Ferro−Fintan, Guggenheium−Anderson−De Boer (GAB), or Pelegwere applied to fit the water and ethanol vapor equilibrium data obtained from this study. The accuracy of the models was evaluated by using the average relative deviation. The Langmuir model was better for the zeolite 3A adsorption system. The starch biosorbent isotherms were fitted well using the GAB, Ferro−Fintan, or Peleg models. The Peleg model with four parameters gave the best fit for the starch system, and the Smith model was good for the cellulose system.

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Section: Introductionmentioning

confidence: 99%

Equilibrium Isotherms of Water and Ethanol Vapors on Starch Sorbents and Zeolite 3A

et al. 2010

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“…The CO 2 adsorption isotherms in the absence of water vapor were measured at 313 K on a ChemiSorb HTP chemical adsorption analyzer (Micromeritics, Japan) after pretreatment of the adsorbent material under a He flow at 343 K for 6 h. In contrast, the CO 2 adsorption isotherms in the presence of water vapor (moisture pre-adsorption) at 313 K were obtained on BELSORP-BG (BEL Japan, Inc.) after pretreatment of the adsorbent material at 343 K for 6 h under vacuum. Measurements obtained on BELSORP-BG are based on a gravimetric–volumetric method for determination of the binary component gaseous adsorption isotherms. − …”

Section: Methodsmentioning

confidence: 99%

Carbon Dioxide Adsorption onto Polyethylenimine-Functionalized Porous Chitosan Beads

Fujiki

Yogo

2014

Energy Fuels

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Polyethylenimine-functionalized porous chitosan (PEI−CS) beads were prepared and their CO 2 adsorption performance was evaluated. The CO 2 adsorption capacity of PEI−CS was dependent upon both the amine content and surface area of the functionalized beads. PEI−CS showed a CO 2 adsorption capacity of 2.3 mmol/g at 313 K and 15 kPa of CO 2 in the absence of water vapor that considerably increased to 3.6 mmol/g in the presence of water vapor. To rationalize this phenomenon, the CO 2 adsorption mechanisms in the absence and presence of water vapor were investigated by diffuse reflectance infrared Fourier transform spectroscopy. The results indicated that the mechanism of CO 2 adsorption onto PEI−CS, in both the absence and presence of water vapor, involved the formation of carbamate. Therefore, the higher CO 2 adsorption capacity in the presence of water vapor was attributed to the increased accessibility to amino groups of PEI−CS, owing to swelling of the polyethylenimine chain and/or chitosan framework upon adsorption of water. The herein reported chitosan-based material displays high CO 2 adsorption capacity as well as excellent regenerability and, thereby, shows potential as an adsorbent for CO 2 capture.

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Production of green energy – ethanol dehydration using rice straw, rice husk and castor oil

Kularathne

Gunathilake

Yatipanthalawa

et al. 2019

Biomass Conv. Bioref.

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Development of Automatic Adsorption Apparatus for Binary Mixture: Measurement of Individual Adsorption Isotherms of Ethanol and Water from Their Mixed Vapors by Active Carbon Fiber

Cited by 6 publications

References 8 publications

Equilibrium Isotherms of Water and Ethanol Vapors on Starch Sorbents and Zeolite 3A

Equilibrium Isotherms of Water and Ethanol Vapors on Starch Sorbents and Zeolite 3A

Carbon Dioxide Adsorption onto Polyethylenimine-Functionalized Porous Chitosan Beads

Production of green energy – ethanol dehydration using rice straw, rice husk and castor oil

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