MFI zeolite as adsorbent for selective recovery of hydrocarbons from ABE fermentation broths

Faisal, Abrar; Zarebska, Agata; Saremi, Pardis; Korelskiy, Danil; Ohlin, Lindsay; Hedlund, Jonas; Grahn, Mattias

doi:10.1007/s10450-013-9576-6

Cited by 37 publications

(34 citation statements)

References 13 publications

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“…At this pH, the adsorbed loading of butanol and butyric acid in the zeolite was 0.06 and 0.07 g/g zeolite respectively. It should here be pointed out that the saturation loading of butanol or butyric acid in high-silica MFI zeolite is ca 0.12 g/g zeolite [16,20]. Summing up the adsorbed amounts of butanol and butyric acid yields 0.13 g/g zeolite, i.e., almost the same as the single component saturation capacity for these two compounds.…”

Section: Resultsmentioning

confidence: 92%

“…We previously showed that the adsorption of butyric acid in high-silica MFI zeolite can be controlled by adjusting the pH of the solutions. Butyric acid is more hydrophobic than the deprotonated butyrate ion and thus shows higher affinity towards hydrophobic high-silica MFI zeolite [20]. By increasing the pH of the fermentation broth well above the pKa value of butyric acid (i.e., 4.82), the adsorption of butyric acid can be reduced, thus increasing the selectivity towards butanol.…”

Section: Resultsmentioning

confidence: 94%

“…However, as the adsorption of the acids is decreased at high pH, the adsorption of acetone increases, whereas adsorption of ethanol decreases. This is expected as acetone shows higher affinity towards high-silica MFI than ethanol [16,18,20]. Tables 3 and 4 show the batch adsorption experiment results from modified black liquor fermentation broth at pH 5.2 and 8, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…However, these lower concentrations may be typical for the case where it is desirable to remove butanol from the fermentor during the fermentation to prevent the inhibition of production by high concentration of butanol in the fermentor. In a previous study, we showed that even at a butanol concentration of 2 g/L, saturation loading was reached in high-silica MFI zeolite [20]. Consequently, the selectivity towards butanol in the present work should still be high.…”

Section: Resultsmentioning

confidence: 99%

“…On the other hand, the well-defined pore size of high-silica MFI zeolite (ca 5.5 Å) may be expected to exclude the typical phenolic compounds found in black liquor by molecular sieving. After adsorption, the products may be recovered from the adsorbent by, e.g., thermal desorption, to recover products and the zeolite can be thereafter be reused [19,20,33]. In this work, we therefore for the first time present data on the recovery of butanol and butyric acid from real ABE fermentation broths prepared from a black liquor hydrolyzate using a high-silica MFI zeolite adsorbent.…”

Section: Introductionmentioning

confidence: 98%

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Zeolite MFI adsorbent for recovery of butanol from ABE fermentation broths produced from an inexpensive black liquor-derived hydrolyzate

Faisal

Zhou

Hedlund

et al. 2018

Biomass Conv. Bioref.

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In this work, high-silica MFI zeolite adsorbent was evaluated for selective recovery of butanol from a real ABE (acetone, butanol, and ethanol) fermentation broth by batch adsorption measurements. The fermentation broth was produced using a hydrolyzate originating from Kraft black liquor, an internal stream in pulp mills, i.e., a low-cost substrate. The adsorbent was very selective towards butanol and butyric acid and became nearly saturated with a mixture of butanol and butyric acid with relative amounts of butanol and butyric acid depending on the pH. The presence of phenolic compounds in significant amounts in the fermentation broths, originating from the black liquor hydrolyzate, did not affect the adsorption of butanol and butyric acid.

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Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

See 3 more Smart Citations

Zeolite MFI adsorbent for recovery of butanol from ABE fermentation broths produced from an inexpensive black liquor-derived hydrolyzate

Faisal

Zhou

Hedlund

et al. 2018

Biomass Conv. Bioref.

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Vapor‐ and liquid‐phase adsorption of alcohol and water in silicalite‐1 synthesized in fluoride media

et al. 2020

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In this work, batch-adsorption experiments and molecular simulations are employed to probe the adsorption of binary mixtures containing ethanol or a linear alkane-1,n-diol solvated in water or ethanol onto silicalite-1. Since the batch-adsorption experiments require an additional relationship to determine the amount of solute (and solvent) adsorbed, as only the bulk liquid reservoir can be probed directly, molecular simulations are used to provide a relationship between solute and solvent adsorption for input to the experimental bulk measurements. The combination of bulk experimental measurements and simulated solutesolvent relationship yields solvent and solute loadings that are self-consistent with simulation alone, and allow for an assessment of the various assumptions made in the literature. At low solution concentrations, the solute loading calculated is independent of the assumption made. At high concentrations, a negligent choice of assumption can lead to systematic overestimation or underestimation of calculated solute loading.

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Facile Preparation of Hydrophobic Colloidal MFI and CHA Crystals and Oriented Ultrathin Films

Zhou

Hedlund

2018

Angewandte Chemie

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We report novel routes for synthesis of defect-free, hydrophobic and monodispersed 10 nm (5 unit cells) thick MFI crystals and 100 nm CHA crystals.T he crystals are obtained in high yield and displayv ery high 1-butanol adsorption from aqueous solution. These crystals are assembled in monolayers for the growth of ultrathin and uniformly oriented films with thicknesses of 36 nm and 330 nm, respectively,u sing as ynthesis gel in the form of ap owder.T his method is very simple and may open up for industrial preparation of materials with improved performances.Increasing efforts have been devoted to synthesizing zeolites with enhanced accessibility to their micropores. [1,2] The particle size reduction of zeolites to the nanometer scale leads to significant changes in properties such as increased external surface areas and decreased diffusion path lengths and the possibility to use for preparation of ultrathin films. However,t he synthesis of nanosized zeolites in hydroxide media brings less desired properties of silanol groups as surface defects.The synthesis of zeolites in fluoride media was developed to alleviate these problems by preparing silanolfree zeolites.H owever,t he zeolite crystals harvested in fluoride media usually have as ize of several micrometers. Consequently,t here is an eed to produce silanol-free zeolite crystals with nanometer size.Here,wereport on the preparation of very small and welldefined, colloidal nanocrystals using straightforward conventional methods in fluoride media. Approaches for synthesis of nanosized zeolite can be classified into two distinct categories:1 )b ottom-up,b ye ngineering of the crystallization process,s uch as controlling the kinetics of nucleation versus crystal growth, [3,4] introducing organic additives [5] or confinedspace synthesis; [6] 2) top-down, that is,p ost-treatment using mechanical force to break large zeolite crystals into nanosized units,t he disadvantages of this method, like partial amorphization and broader particle size distribution, can be remedied by recrystallization. [7,8] Here,weadopted the two approaches and successfully synthesized 10 nm thick pure silica MFI crystals through the bottom-up approach and 100 nm pure silica CHA crystals by the top-down approach. Them ono-dispersed and silanol-free crystals prepared in the present work are the smallest ever reported.The10nmthick MFI crystals are comparable to the 5nm (2.5 unit cells) thick nanosheets produced by seeded growth in hydroxide (OH À )m edia with an on-commercially available template. [9] Our defect-free,h ydrophobic MFI crystals produced in fluoride medium displays very high adsorption capacity of 1-butanol (0.13 gg À1 zeolite) from aw ater solution, equal to the equilibrium adsorption ability estimated by Monte Carlo simulations. [10] The1 00 nm CHA crystal shows very high 1-butanol adsorption (0.18 gg À1 zeolite) from aqueous solution, which is two times higher than the reported adsorption of micrometer sized Si-CHA crystals from vaporphase. [11] Furthermore,t he MFI crystals are o...

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MFI zeolite as adsorbent for selective recovery of hydrocarbons from ABE fermentation broths

Cited by 37 publications

References 13 publications

Zeolite MFI adsorbent for recovery of butanol from ABE fermentation broths produced from an inexpensive black liquor-derived hydrolyzate

Zeolite MFI adsorbent for recovery of butanol from ABE fermentation broths produced from an inexpensive black liquor-derived hydrolyzate

Vapor‐ and liquid‐phase adsorption of alcohol and water in silicalite‐1 synthesized in fluoride media

Facile Preparation of Hydrophobic Colloidal MFI and CHA Crystals and Oriented Ultrathin Films

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