Ethanol production from starch in a pervaporation membrane bioreactor using <i>Clostridium thermohydrosulfuricum</i>

Mori, Yutaka; Inaba, Toshiharu

doi:10.1002/bit.260360815

Cited by 86 publications

(32 citation statements)

References 15 publications

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“…The separation factor Table 2 shows the pervaporation performance of other polymeric membranes. As can be shown, our PDMS-b-PPO asymmetric membrane exhibit better flux than that of the reported polymeric membranes while the separation factors maintained on a relatively high level [26][27][28][29][30][31][32][33][34].…”

Section: The Effect Of Raw Materials Ratio On the Structure Of Pdms-b-mentioning

confidence: 66%

A new PDMS-b-PPO block copolymer membrane with novel non-perforated structure towards high flux for alcohol permselective pervaporation

Liu¹,

Guo

Ji³

et al. 2015

Express Polym. Lett.

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Section: The Effect Of Raw Materials Ratio On the Structure Of Pdms-b-mentioning

confidence: 66%

A new PDMS-b-PPO block copolymer membrane with novel non-perforated structure towards high flux for alcohol permselective pervaporation

Liu¹,

Guo

Ji³

et al. 2015

Express Polym. Lett.

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“…This strain is able to utilize xylose from lignocellulosic hyrolysates, and has been shown to digest corn stover pretreated with dilute acid [93] and wheat straw hydrolysate [94]. Other species which have been evaluated for the production of ethanol are T. thermohydrosulphuricus and T. brockii [69,95].…”

Section: Thermoanaerobacterium Saccharolyticummentioning

confidence: 99%

Extremophiles in biofuel synthesis

Barnard

Casanueva

Tuffin

et al. 2010

Environmental Technology

132

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“…[7][8][9][10] Most of the membranes were based on homopolymers or copolymers of siloxanes. However, polydimethylsiloxane membranes prepared using conventional methods, such as solvent casting and hot pressing, were dense membranes.…”

mentioning

confidence: 99%

Pervaporation of Ethanol/Water Mixtures Using Novel Hydrophobic Membranes Based on Concentrated Emulsion Polymerization

Shi

Zhang

et al. 2005

Polym J

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ABSTRACT:A pervaporation membrane was prepared via the concentrated emulsion polymerization method. The concentrated emulsion formed was pre-polymerized, after which a mixture of another hydrophobic monomer, a crosslinker and an initiator were added with stirring to the system. The gel formed was located between two glass plates and subjected to polymerization. The membrane copied the structure of its precursor concentrated emulsion and composed of closely packed latexes that squeezed each other. The micro-channel among the latexes provided additional pathways for the permeates. The morphologies of the concentrated emulsion and membrane were examined via optical and electron microscopies. The pervaporation performance of the membrane in the extraction of ethanol from ethanol/water mixtures was investigated. In certain ranges of composition, the flux and selectivity simultaneously increased. [DOI 10.1295/polymj.37.925] KEY WORDS Pervaporation Membrane / Ethanol / Concentrated Emulsion /The emphasis in this paper is on a new method to prepare pervaporation membranes. The prepared membranes will be used to pervaporate ethanol from ethanol/water mixtures. While the pervaporation of water from ethanol/water mixtures was investigated in a large numbers of papers, 1-6 the pervaporation of ethanol from such mixtures was examined in much fewer papers and is more difficult to achieve.Between ethanol and water, ethanol is more hydrophobic; for this reason, hydrophobic materials were naturally selected to pervaporate ethanol from ethanol/water mixtures.7-10 Most of the membranes were based on homopolymers or copolymers of siloxanes. However, polydimethylsiloxane membranes prepared using conventional methods, such as solvent casting and hot pressing, were dense membranes. Their total permeation rates were between 7 and 160 g/(m 2 Áh), with selectivity between 2.4 and 6.7 (30-37 C, 10 wt % ethanol in water), and an increase in selectivity was often associated with a decrease in the flux. 11,12Such performances are not satisfactory in applications.It was noticed that the polymeric membrane prepared via traditional methods are all dense ones, [13][14][15][16] in which the gap among the chains provides the pathway of the permeates. However, the average interchain distance among the amorphous flexible chains is 0.4-0.5 nm 17 and the van der Waals radius of ethanol molecules is 0.52 nm. For this reason, the interchain gap is not big enough for ethanol molecules to diffuse. In other words, the separation selectivity is not only controlled by the polarity, but also by the size of the molecule. For the purpose of preferably separation of ethanol from water, additional larger pathway for permeates should be provided. Among various preparation methods developed, concentrated emulsion polymerization constitutes the first choice.A series of hydrophilic/hydrophobic composite membranes was prepared via the concentrated emulsion polymerization method. 18,19 In a concentrated emulsion, the volume fraction of the dispersed phase is larger t...

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Ethanol production from starch in a pervaporation membrane bioreactor using Clostridium thermohydrosulfuricum

Cited by 86 publications

References 15 publications

A new PDMS-b-PPO block copolymer membrane with novel non-perforated structure towards high flux for alcohol permselective pervaporation

A new PDMS-b-PPO block copolymer membrane with novel non-perforated structure towards high flux for alcohol permselective pervaporation

Extremophiles in biofuel synthesis

Pervaporation of Ethanol/Water Mixtures Using Novel Hydrophobic Membranes Based on Concentrated Emulsion Polymerization

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