Kinetic studies of vapor-phase hydrogenolysis of butyl butyrate to butanol over Cu/ZnO/Al2O3 catalyst

Ju, In Bum; Jeon, Wonjin; Park, Myung-June; Suh, Young Woong; Suh, Dong Jin; Lee, Chang Ha

doi:10.1016/j.apcata.2010.08.009

Cited by 16 publications

(16 citation statements)

References 11 publications

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“…Several avenues for producing biofuels and solvents from butyrate have been investigated. For example, butanol which is a promising biofuel and an important solvent can be produced by catalytical reduction of biologically derived butyrate with hydrogen (Ju et al, 2010). Ethanol and butanol derived from fermentation technologies can be enzymatically esterified with butyrate to produce ethyl-, and butyl butyrate (Van den Berg et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Production of butyric acid by Clostridium tyrobutyricum (ATCC25755) using sweet sorghum stalks and beet molasses

Sjöblom

Μάτσακας

Christakopoulos

et al. 2015

Industrial Crops and Products

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a b s t r a c tEnzymatically liquefied sweet sorghum stalks and beet molasses were evaluated for butyrate production using Clostridium tyrobutyricum in 1 L scale fed-batch fermentations. The hydrolysates used for the fermentations were prepared separately by liquefying the sorghum stalks at 50 • C, pH 5.0 for 18 h, with 30% (w/v) DM content using the enzyme preparation Cellic ® CTec2 at an activity of 26.5 FPU/g DM. To enhance sucrose consumption, the fermentations were supplemented with invertase at an activity equivalent to 8.3 U/g DM. With the hydrolysate as the feedstock, a butyrate concentration of 37.2 ± 0.8 g/L, a productivity of 0.86 ± 0.02 g/L h and a yield of 0.39 ± 0.02 g/g (p = 0.05) consumed sugars were obtained. Finally, a butyrate concentration of 58.8 g/L, a productivity of 1.9 g/L h, a butyrate yield of 0.52 g/g consumed sugars and a dry cell mass concentration of 15.7 g/L were obtained with fed-batch cultivation and a constant feed consisting of 64% sorghum hydrolysate juice and 36% molasses. Evidence for inducible saccharolytic activity was also proven, as the cellulase activity in the culture supernatant was found more than double during feed with limiting sugar concentrations. The present study clearly demonstrates that combinations of low cost raw materials can be used for efficient butyrate production, also without cell immobilization.

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Section: Introductionmentioning

confidence: 99%

Production of butyric acid by Clostridium tyrobutyricum (ATCC25755) using sweet sorghum stalks and beet molasses

Sjöblom

Μάτσακας

Christakopoulos

et al. 2015

Industrial Crops and Products

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“…For the production of larger molecules appropriate for diesel and jet fuels, C–C coupling reactions such as ketonization or esterification reactions can also be exploited [ 25 , 38 , 39 ]. In addition, butyl butyrate produced by esterification with butyric acid can be used for the production of butanol by hydrogenolysis with hydrogen [ 27 ]. The intermediate step of esterification allows milder conditions to be used compared to direct catalytic conversion to butanol.…”

Section: Resultsmentioning

confidence: 99%

“…One such attempt is the use of a transition-metal catalyst for alkylation in ABE fermentation for conversion to a higher-molecular-mass fuel [ 21 ]. Another is the upgrading of butyric acid to butanol by hydrogenation [ 24 ] or by esterification [ 25 , 26 ], and hydrogenolysis [ 27 – 29 ] (Fig. 1 ).…”

Section: Introductionmentioning

confidence: 99%

Enhanced extraction of butyric acid under high-pressure CO2 conditions to integrate chemical catalysis for value-added chemicals and biofuels

Chun

Choi

Sang

2018

Biotechnol Biofuels

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BackgroundExtractive fermentation with the removal of carboxylic acid requires low pH conditions because acids are better partitioned into the solvent phase at low pH values. However, this requirement conflicts with the optimal near-neutral pH conditions for microbial growth.ResultsCO2 pressurization was used, instead of the addition of chemicals, to decrease pH for the extraction of butyric acid, a fermentation product of Clostridium tyrobutyricum, and butyl butyrate was selected as an extractant. CO2 pressurization (50 bar) improved the extraction efficiency of butyric acid from a solution at pH 6, yielding a distribution coefficient (D) 0.42. In situ removal of butyric acid during fermentation increased the production of butyric acid by up to 4.10 g/L h, an almost twofold increase over control without the use of an extraction process.ConclusionIn situ extraction of butyric acid using temporal CO2 pressurization may be applied to an integrated downstream catalytic process for upgrading butyric acid to value-added chemicals in an organic solvent.Electronic supplementary materialThe online version of this article (10.1186/s13068-018-1120-1) contains supplementary material, which is available to authorized users.

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“…In principle, 1 mol of butyric acid and 1 mol of 1-butanol are esterified to 1 mol of butyl-butyrate which subsequently is hydrogenolyzed to 2 mol of 1-butanol (Ju et al . 2010 ; Kang et al . 2011 ).…”

Section: Chemocatalytic Upgrading Of Carboxylic Acidsmentioning

confidence: 99%

“… 2009 ; Ju et al . 2010 ; Chuck and Donnelly 2014 ). Hence, there is a great interest to explore methods to upgrade carboxylic acids to its derivatives as means for more efficient process concepts.…”

Section: Introductionmentioning

confidence: 99%

Catalytic upgrading of butyric acid towards fine chemicals and biofuels

Sjöblom¹,

Μάτσακας²,

Christakopoulos³

2016

FEMS Microbiology Letters

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Fermentation-based production of butyric acid is robust and efficient. Modern catalytic technologies make it possible to convert butyric acid to important fine chemicals and biofuels. Here, current chemocatalytic and biocatalytic conversion methods are reviewed with a focus on upgrading butyric acid to 1-butanol or butyl-butyrate. Supported Ruthenium- and Platinum-based catalyst and lipase exhibit important activities which can pave the way for more sustainable process concepts for the production of green fuels and chemicals.

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Kinetic studies of vapor-phase hydrogenolysis of butyl butyrate to butanol over Cu/ZnO/Al2O3 catalyst

Cited by 16 publications

References 11 publications

Production of butyric acid by Clostridium tyrobutyricum (ATCC25755) using sweet sorghum stalks and beet molasses

Production of butyric acid by Clostridium tyrobutyricum (ATCC25755) using sweet sorghum stalks and beet molasses

Enhanced extraction of butyric acid under high-pressure CO2 conditions to integrate chemical catalysis for value-added chemicals and biofuels

Catalytic upgrading of butyric acid towards fine chemicals and biofuels

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