51
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Wallenius J, Maaheimo H, Eerikäinen T. Carbon 13-Metabolic Flux Analysis derived constraint-based metabolic modelling of Clostridium acetobutylicum in stressed chemostat conditions. BIORESOURCE TECHNOLOGY 2016; 219:378-386. [PMID: 27501035 DOI: 10.1016/j.biortech.2016.07.137] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Revised: 07/29/2016] [Accepted: 07/30/2016] [Indexed: 05/04/2023]
Abstract
The metabolism of butanol producing bacteria Clostridium acetobutylicum was studied in chemostat with glucose limited conditions, butanol stimulus, and as a reference cultivation. COnstraint-Based Reconstruction and Analysis (COBRA) was applied using additional constraints from (13)C Metabolic Flux Analysis ((13)C-MFA) and experimental measurement results. A model consisting of 451 metabolites and 604 reactions was utilized in flux balance analysis (FBA). The stringency of the flux spaces considering different optimization objectives, i.e. growth rate maximization, ATP maintenance, and NADH/NADPH formation, for flux variance analysis (FVA) was studied in the different modelled conditions. Also a previously uncharacterized exopolysaccharide (EPS) produced by C. acetobutylicum was characterized on monosaccharide level. The major monosaccharide components of the EPS were 40n-% rhamnose, 34n-% glucose, 13n-% mannose, 10n-% galactose, and 2n-% arabinose. The EPS was studied to have butanol adsorbing property, 70(butanol)mg(EPS)g(-1) at 37°C.
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Affiliation(s)
- Janne Wallenius
- Aalto University, School of Chemical Technology, Department of Biotechnology and Chemical Technology, P.O. Box 6100, FIN-02015, Finland.
| | - Hannu Maaheimo
- VTT, Technical Research Centre of Finland Ltd, P.O. Box 1000, FI-02044 VTT Espoo, Finland
| | - Tero Eerikäinen
- Aalto University, School of Chemical Technology, Department of Biotechnology and Chemical Technology, P.O. Box 6100, FIN-02015, Finland
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52
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Affiliation(s)
- Hope Aitchison
- School
of Chemistry, University of Bristol, Bristol BS8 1TS, United Kingdom
| | - Richard L. Wingad
- School
of Chemistry, University of Bristol, Bristol BS8 1TS, United Kingdom
| | - Duncan F. Wass
- School
of Chemistry, University of Bristol, Bristol BS8 1TS, United Kingdom
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53
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A Review of Process-Design Challenges for Industrial Fermentation of Butanol from Crude Glycerol by Non-Biphasic Clostridium pasteurianum. FERMENTATION-BASEL 2016. [DOI: 10.3390/fermentation2020013] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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54
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Johnson EE, Rehmann L. The role of 1,3-propanediol production in fermentation of glycerol by Clostridium pasteurianum. BIORESOURCE TECHNOLOGY 2016; 209:1-7. [PMID: 26946434 DOI: 10.1016/j.biortech.2016.02.088] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Revised: 02/18/2016] [Accepted: 02/20/2016] [Indexed: 06/05/2023]
Abstract
Waste crude glycerol from biodiesel production can be used to produce biobutanol using Clostridium pasteurianum with the main products being n-butanol, 1,3-propanediol (PDO) and ethanol. There has been much discrepancy and mystery around the cause and effect of process parameters on the product distribution, thus a better understanding of the pathway regulation is required. This study shows that as process pH decreased, the rate of cell growth and CO2 production also decreased, resulting in slower fermentations, increased duration of butanol production and higher butanol concentrations and yields. The production rate of PDO was multi-modal and the role of PDO appears to function in redox homeostasis. The results also showed that C. pasteurianum displayed little biphasic behavior when compared to Clostridia spp. typically used in ABE fermentation due to the alternative glycolysis-independent reductive pathway of PDO production, rendering it suitable for a continuous fermentation process.
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Affiliation(s)
- Erin E Johnson
- Department of Chemical & Biochemical Engineering, The University of Western Ontario, 1151 Richmond St., London, Ontario N6A 3K7, Canada
| | - Lars Rehmann
- Department of Chemical & Biochemical Engineering, The University of Western Ontario, 1151 Richmond St., London, Ontario N6A 3K7, Canada; Department of Biochemical Engineering, AVT - Aachener Verfahrenstechnik, RWTH Aachen University, Worringer Weg 1, 52074 Aachen, Germany.
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55
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Consolidating biofuel platforms through the fermentative bioconversion of crude glycerol to butanol. World J Microbiol Biotechnol 2016; 32:103. [DOI: 10.1007/s11274-016-2056-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Accepted: 03/18/2016] [Indexed: 12/11/2022]
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56
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Amiri H, Karimi K. Integration of Autohydrolysis and Organosolv Delignification for Efficient Acetone, Butanol, and Ethanol Production and Lignin Recovery. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.6b00110] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hamid Amiri
- Department
of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
- Department
of Biotechnology, Faculty of Advanced Sciences and Technologies, University of Isfahan, Isfahan 81746-73441, Iran
| | - Keikhosro Karimi
- Department
of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
- Industrial
Biotechnology Group, Institute of Biotechnology and Bioengineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
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57
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Wu YD, Xue C, Chen LJ, Yuan WJ, Bai FW. Improvements of metabolites tolerance in Clostridium acetobutylicum by micronutrient zinc supplementation. BIOTECHNOL BIOPROC E 2016. [DOI: 10.1007/s12257-015-0583-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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58
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DeJaco RF, Bai P, Tsapatsis M, Siepmann JI. Adsorptive Separation of 1-Butanol from Aqueous Solutions Using MFI- and FER-Type Zeolite Frameworks: A Monte Carlo Study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:2093-2101. [PMID: 26818393 DOI: 10.1021/acs.langmuir.5b04483] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Anaerobic fermentation can transform carbohydrates to yield a multicomponent mixture comprising mainly of acetone, 1-butanol, and ethanol (ABE) in a typical weight ratio of 3:6:1. Compared to ethanol, 1-butanol, the main product of ABE fermentation, offers significant advantages as a biofuel or a fuel additive. However, the toxicity of 1-butanol for cell cultures requires broth concentrations to be low in 1-butanol (≈1-2 wt %). An energy-efficient recovery method that performs well even at low 1-butanol concentrations is therefore necessary to ensure economic feasibility of the ABE fermentation process. In this work, configurational-bias Monte Carlo simulations in the Gibbs ensemble are performed to probe the adsorption of 1-butanol/water solutions onto all-siliceous zeolites with the framework types MFI and FER. At low solution concentration, the selectivity and capacity for 1-butanol in MFI are larger than those in FER, while the opposite is true for concentrations at or above those of ABE broths. Structural analysis at various loadings sheds light on the different sorbate-sorbate and sorbate-sorbent interactions that govern trends in adsorption in each zeolite.
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Affiliation(s)
- Robert F DeJaco
- Department of Chemical Engineering and Materials Science, ‡Chemical Theory Center, and §Department of Chemistry, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Peng Bai
- Department of Chemical Engineering and Materials Science, ‡Chemical Theory Center, and §Department of Chemistry, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Michael Tsapatsis
- Department of Chemical Engineering and Materials Science, ‡Chemical Theory Center, and §Department of Chemistry, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - J Ilja Siepmann
- Department of Chemical Engineering and Materials Science, ‡Chemical Theory Center, and §Department of Chemistry, University of Minnesota , Minneapolis, Minnesota 55455, United States
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59
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Youn SH, Lee KM, Kim KY, Lee SM, Woo HM, Um Y. Effective isopropanol-butanol (IB) fermentation with high butanol content using a newly isolated Clostridium sp. A1424. BIOTECHNOLOGY FOR BIOFUELS 2016; 9:230. [PMID: 27800016 PMCID: PMC5080687 DOI: 10.1186/s13068-016-0650-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Accepted: 10/18/2016] [Indexed: 05/17/2023]
Abstract
BACKGROUND Acetone-butanol-ethanol fermentation has been studied for butanol production. Alternatively, to achieve acetone-free butanol production, use of clostridium strains producing butanol and 1,3-propanediol (1,3-PDO) from glycerol, natural and engineered isopropanol-butanol-ethanol (IBE) producers has been attempted; however, residual 1,3-PDO and acetone, low IBE production by natural IBE producers, and complicated gene modification are limitations. RESULTS Here, we report an effective isopropanol and butanol (IB) fermentation using a newly isolated Clostridium sp. A1424 capable of producing IB from various substrates with a small residual acetone. Notably, this strain also utilized glycerol and produced butanol and 1,3-PDO. After 46.35 g/L of glucose consumption at pH 5.5-controlled batch fermentation, Clostridium sp. A1424 produced 9.43 g/L of butanol and 13.92 g/L of IB at the productivity of 0.29 and 0.44 g/L/h, respectively, which are the highest values in glucose-based batch fermentations using natural IB producers. More interestingly, using glucose-glycerol mixtures at ratios ranging from 20:2 to 14:8 led to not only acetone-free and 1,3-PDO-free IB fermentation but also enhanced IB production along with a much higher butanol content (butanol/isopropanol ratio of 1.81 with glucose vs. 2.07-6.14 with glucose-glycerol mixture). Furthermore, when the mixture of glucose and crude glycerol at the ratio of 14:8 (total concentration of 35.68 g/L) was used, high butanol/isopropanol ratio (3.44) and butanol titer (9.86 g/L) were achieved with 1.4-fold enhanced butanol yield (0.28 g/g) and productivity (0.41 g/L/h) compared to those with glucose only at pH 5.5. CONCLUSIONS A newly isolated Clostridium sp. A1424 was able to produce butanol and isopropanol from various carbon sources. The productivity and titer of butanol and total alcohol obtained in this study were higher than the previously reported results obtained using other natural IB producers. Use of the mixture of glucose and glycerol was successful to achieve acetone-free, 1,3-PDO-free, and enhanced IB production with higher yield, productivity, and selectivity of butanol compared to those with glucose only, providing great advantages from the perspective of carbon recovery to alcohols. This notable result could be accomplished by isolating an effective IB producer Clostridium sp. A1424 as well as by utilizing glucose-glycerol mixtures.
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Affiliation(s)
- Sung Hun Youn
- Clean Energy Research Center, Korea Institute of Science and Technology (KIST), Hwarangno 14‑gil 5, Seongbuk‑gu, Seoul, 02792 South Korea
| | - Kyung Min Lee
- Clean Energy Research Center, Korea Institute of Science and Technology (KIST), Hwarangno 14‑gil 5, Seongbuk‑gu, Seoul, 02792 South Korea
| | - Ki-Yeon Kim
- Clean Energy Research Center, Korea Institute of Science and Technology (KIST), Hwarangno 14‑gil 5, Seongbuk‑gu, Seoul, 02792 South Korea
| | - Sun-Mi Lee
- Clean Energy Research Center, Korea Institute of Science and Technology (KIST), Hwarangno 14‑gil 5, Seongbuk‑gu, Seoul, 02792 South Korea
- Clean Energy and Chemical Engineering, Korea University of Science and Technology, 217 Gajeong‑ro, Yuseong‑gu, Daejeon, 34113 South Korea
| | - Han Min Woo
- Department of Food Science and Biotechnology, Sungkyunkwan University (SKKU), 2066 Seobu-ro, Jangan-gu, Suwon, 16419 South Korea
| | - Youngsoon Um
- Clean Energy Research Center, Korea Institute of Science and Technology (KIST), Hwarangno 14‑gil 5, Seongbuk‑gu, Seoul, 02792 South Korea
- Clean Energy and Chemical Engineering, Korea University of Science and Technology, 217 Gajeong‑ro, Yuseong‑gu, Daejeon, 34113 South Korea
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60
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Gandarias I, Nowicka E, May BJ, Alghareed S, Armstrong RD, Miedziak PJ, Taylor SH. The selective oxidation of n-butanol to butyraldehyde by oxygen using stable Pt-based nanoparticulate catalysts: an efficient route for upgrading aqueous biobutanol. Catal Sci Technol 2016. [DOI: 10.1039/c5cy01726b] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Supported Pt nanoparticles are shown to be active and selective towards butyraldehyde in the base-free oxidation of n-butanol by O2 in an aqueous phase.
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Affiliation(s)
- Inaki Gandarias
- Department of Chemical and Environmental Engineering
- University of the Basque Country (UPV/EHU)
- Bilbao
- Spain
| | - Ewa Nowicka
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University, Main Building
- Cardiff
- UK
| | - Blake J. May
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University, Main Building
- Cardiff
- UK
| | - Shaimaa Alghareed
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University, Main Building
- Cardiff
- UK
| | - Robert D. Armstrong
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University, Main Building
- Cardiff
- UK
| | - Peter J. Miedziak
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University, Main Building
- Cardiff
- UK
| | - Stuart H. Taylor
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University, Main Building
- Cardiff
- UK
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61
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Amiri H, Karimi K. Autohydrolysis: A promising pretreatment for the improvement of acetone, butanol, and ethanol production from woody materials. Chem Eng Sci 2015. [DOI: 10.1016/j.ces.2015.07.020] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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62
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Wu YD, Xue C, Chen LJ, Wan HH, Bai FW. Transcriptional analysis of micronutrient zinc-associated response for enhanced carbohydrate utilization and earlier solventogenesis in Clostridium acetobutylicum. Sci Rep 2015; 5:16598. [PMID: 26586044 PMCID: PMC4653742 DOI: 10.1038/srep16598] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Accepted: 10/15/2015] [Indexed: 12/15/2022] Open
Abstract
The micronutrient zinc plays vital roles in ABE fermentation by Clostridium acetobutylicum. In order to elucidate the zinc-associated response for enhanced glucose utilization and earlier solventogenesis, transcriptional analysis was performed on cells grown in glucose medium at the exponential growth phase of 16 h without/with supplementary zinc. Correspondingly, the gene glcG (CAC0570) encoding a glucose-specific PTS was significantly upregulated accompanied with the other two genes CAC1353 and CAC1354 for glucose transport in the presence of zinc. Additionally, genes involved in the metabolisms of six other carbohydrates (maltose, cellobiose, fructose, mannose, xylose and arabinose) were differentially expressed, indicating that the regulatory effect of micronutrient zinc is carbohydrate-specific with respects to the improved/inhibited carbohydrate utilization. More importantly, multiple genes responsible for glycolysis (glcK and pykA), acidogenesis (thlA, crt, etfA, etfB and bcd) and solventogenesis (ctfB and bdhA) of C. acetobutylicum prominently responded to the supplementary zinc at differential expression levels. Comparative analysis of intracellular metabolites revealed that the branch node intermediates such as acetyl-CoA, acetoacetyl-CoA, butyl-CoA, and reducing power NADH remained relatively lower whereas more ATP was generated due to enhanced glycolysis pathway and earlier initiation of solventogenesis, suggesting that the micronutrient zinc-associated response for the selected intracellular metabolisms is significantly pleiotropic.
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Affiliation(s)
- You-Duo Wu
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian 116024, China
| | - Chuang Xue
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian 116024, China
| | - Li-Jie Chen
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian 116024, China
| | - Hui-Hui Wan
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, Liaoning, China
| | - Feng-Wu Bai
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian 116024, China.,School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
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63
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Peleteiro S, Rivas S, Alonso JL, Santos V, Parajó JC. Utilization of Ionic Liquids in Lignocellulose Biorefineries as Agents for Separation, Derivatization, Fractionation, or Pretreatment. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:8093-8102. [PMID: 26335846 DOI: 10.1021/acs.jafc.5b03461] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Ionic liquids (ILs) can play multiple roles in lignocellulose biorefineries, including utilization as agents for the separation of selected compounds or as reaction media for processing lignocellulosic materials (LCM). Imidazolium-based ILs have been proposed for separating target components from LCM biorefinery streams, for example, the dehydration of ethanol-water mixtures or the extractive separation of biofuels (ethanol, butanol) or lactic acid from the respective fermentation broths. As in other industries, ILs are potentially suitable for removing volatile organic compounds or carbon dioxide from gaseous biorefinery effluents. On the other hand, cellulose dissolution in ILs allows homogeneous derivatization reactions to be carried out, opening new ways for product design or for improving the quality of the products. Imidazolium-based ILs are also suitable for processing native LCM, allowing the integral benefit of the feedstocks via separation of polysaccharides and lignin. Even strongly lignified materials can yield cellulose-enriched substrates highly susceptible to enzymatic hydrolysis upon ILs processing. Recent developments in enzymatic hydrolysis include the identification of ILs causing limited enzyme inhibition and the utilization of enzymes with improved performance in the presence of ILs.
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Affiliation(s)
- Susana Peleteiro
- Chemical Engineering Department, Faculty of Science, University of Vigo (Campus Ourense) , Polytechnical Building, As Lagoas, 32004 Ourense, Spain
- CITI (Centro de Investigación, Transferencia e Innovación), University of Vigo , Tecnopole, San Cibrao das Viñas, 32900 Ourense, Spain
| | - Sandra Rivas
- Chemical Engineering Department, Faculty of Science, University of Vigo (Campus Ourense) , Polytechnical Building, As Lagoas, 32004 Ourense, Spain
- CITI (Centro de Investigación, Transferencia e Innovación), University of Vigo , Tecnopole, San Cibrao das Viñas, 32900 Ourense, Spain
| | - José L Alonso
- Chemical Engineering Department, Faculty of Science, University of Vigo (Campus Ourense) , Polytechnical Building, As Lagoas, 32004 Ourense, Spain
- CITI (Centro de Investigación, Transferencia e Innovación), University of Vigo , Tecnopole, San Cibrao das Viñas, 32900 Ourense, Spain
| | - Valentín Santos
- Chemical Engineering Department, Faculty of Science, University of Vigo (Campus Ourense) , Polytechnical Building, As Lagoas, 32004 Ourense, Spain
- CITI (Centro de Investigación, Transferencia e Innovación), University of Vigo , Tecnopole, San Cibrao das Viñas, 32900 Ourense, Spain
| | - Juan C Parajó
- Chemical Engineering Department, Faculty of Science, University of Vigo (Campus Ourense) , Polytechnical Building, As Lagoas, 32004 Ourense, Spain
- CITI (Centro de Investigación, Transferencia e Innovación), University of Vigo , Tecnopole, San Cibrao das Viñas, 32900 Ourense, Spain
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64
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Cray JA, Stevenson A, Ball P, Bankar SB, Eleutherio ECA, Ezeji TC, Singhal RS, Thevelein JM, Timson DJ, Hallsworth JE. Chaotropicity: a key factor in product tolerance of biofuel-producing microorganisms. Curr Opin Biotechnol 2015; 33:228-59. [PMID: 25841213 DOI: 10.1016/j.copbio.2015.02.010] [Citation(s) in RCA: 110] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Revised: 02/13/2015] [Accepted: 02/18/2015] [Indexed: 10/23/2022]
Abstract
Fermentation products can chaotropically disorder macromolecular systems and induce oxidative stress, thus inhibiting biofuel production. Recently, the chaotropic activities of ethanol, butanol and vanillin have been quantified (5.93, 37.4, 174kJ kg(-1)m(-1) respectively). Use of low temperatures and/or stabilizing (kosmotropic) substances, and other approaches, can reduce, neutralize or circumvent product-chaotropicity. However, there may be limits to the alcohol concentrations that cells can tolerate; e.g. for ethanol tolerance in the most robust Saccharomyces cerevisiae strains, these are close to both the solubility limit (<25%, w/v ethanol) and the water-activity limit of the most xerotolerant strains (0.880). Nevertheless, knowledge-based strategies to mitigate or neutralize chaotropicity could lead to major improvements in rates of product formation and yields, and also therefore in the economics of biofuel production.
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Affiliation(s)
- Jonathan A Cray
- Institute for Global Food Security, School of Biological Sciences, MBC, Queen's University Belfast, Belfast BT9 7BL, Northern Ireland, UK
| | - Andrew Stevenson
- Institute for Global Food Security, School of Biological Sciences, MBC, Queen's University Belfast, Belfast BT9 7BL, Northern Ireland, UK
| | - Philip Ball
- 18 Hillcourt Road, East Dulwich, London SE22 0PE, UK
| | - Sandip B Bankar
- Department of Chemical Engineering, College of Engineering, Bharati Vidyapeeth University, Pune-Satara Road, Pune 411043, India
| | - Elis C A Eleutherio
- Universidade Federal do Rio de Janeiro, Instituto de Quimica, Programa de Pós-graduação Bioquimica, Rio de Janeiro, RJ, Brazil
| | - Thaddeus C Ezeji
- Department of Animal Sciences and Ohio Agricultural Research and Development Center (OARDC), The Ohio State University, 305 Gerlaugh Hall, 1680 Madison Avenue, Wooster, OH 44691, USA
| | - Rekha S Singhal
- Department of Food Engineering and Technology, Institute of Chemical Technology, N.P. Marg, Matunga, Mumbai, Maharashtra 400019, India
| | - Johan M Thevelein
- Laboratory of Molecular Cell Biology, Institute of Botany and Microbiology, KU Leuven and Department of Molecular Microbiology, VIB, Kasteelpark Arenberg 31, Flanders, Leuven-Heverlee B-3001, Belgium
| | - David J Timson
- Institute for Global Food Security, School of Biological Sciences, MBC, Queen's University Belfast, Belfast BT9 7BL, Northern Ireland, UK
| | - John E Hallsworth
- Institute for Global Food Security, School of Biological Sciences, MBC, Queen's University Belfast, Belfast BT9 7BL, Northern Ireland, UK.
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65
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Gandarias I, Miedziak PJ, Nowicka E, Douthwaite M, Morgan DJ, Hutchings GJ, Taylor SH. Selective oxidation of n-butanol using gold-palladium supported nanoparticles under base-free conditions. CHEMSUSCHEM 2015; 8:473-480. [PMID: 25522346 DOI: 10.1002/cssc.201403190] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Revised: 11/14/2014] [Indexed: 06/04/2023]
Abstract
The base-free selective catalytic oxidation of n-butanol by O2 in an aqueous phase has been studied using Au-Pd bimetallic nanoparticles supported on titania. Au-Pd/TiO2 catalysts were prepared by different methods: wet impregnation, physical mixing, deposition-precipitation and sol immobilisation. The sol immobilisation technique, which used polyvinyl alcohol (PVA) as the stabilizing agent, gave the catalyst with the smallest average particle size and the highest stable activity and selectivity towards butyric acid. Increasing the amount of PVA resulted in a decrease in the size of the nanoparticles. However, it also reduced activity by limiting the accessibility of reactants to the active sites. Heating the catalyst to reflux with water at 90 °C for 1 h was the best method to enhance the surface exposure of the nanoparticles without affecting their size, as determined by TEM, X-ray photoelectron spectroscopy and CO chemisorption analysis. This catalyst was not only active and selective towards butyric acid but was also stable under the operating conditions.
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Affiliation(s)
- Inaki Gandarias
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT (UK)
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66
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Zhang P, Zheng PY, Zhao FY, An QF, Gao CJ. Preparation and pervaporation characteristics of novel ethanol permselective polyelectrolyte–surfactant complex membranes. RSC Adv 2015. [DOI: 10.1039/c5ra09308b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Recovery of ethanol from a low concentration aqueous solution is a critical step for biofuel production.
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Affiliation(s)
- Ping Zhang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science & Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Pei-Yao Zheng
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science & Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Feng-Yang Zhao
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science & Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Quan-Fu An
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science & Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Cong-Jie Gao
- The Development Center of Water Treatment Technology
- Hangzhou 310012
- China
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67
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Su H, Zhao Y, Wang M, Xu Y. Development and application of a novel screening method and experimental use of the mutant bacterial strain Clostridium beijerinckii NCIMB 8052 for production of butanol via fermentation of fresh cassava. RSC Adv 2015. [DOI: 10.1039/c4ra16576d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Classic chemical mutagenesis has a demonstrated potential to create a strain ofClostridiumwith improved fermentation performance for obtaining high butanol yield.
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Affiliation(s)
- Haifeng Su
- Enviromentally-Begnin Chemical Process Research Center
- Division of Ecological & Enviromental Research on the Three Gorges
- Chongqing Institute of Green and Interligent Technology
- Chinese Academy of Science
- P. R. China
| | - Yun Zhao
- Key Laboratory of Bio-resources and Eco-environment of Ministry of Education
- College of Life Sciences
- Sichuan University
- Chengdu 610064
- P. R. China
| | - Maolin Wang
- Key Laboratory of Bio-resources and Eco-environment of Ministry of Education
- College of Life Sciences
- Sichuan University
- Chengdu 610064
- P. R. China
| | - Yuanjian Xu
- Enviromentally-Begnin Chemical Process Research Center
- Division of Ecological & Enviromental Research on the Three Gorges
- Chongqing Institute of Green and Interligent Technology
- Chinese Academy of Science
- P. R. China
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68
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Bai Y, Dong L, Lin J, Zhu Y, Zhang C, Gu J, Sun Y, Xu Y. High performance polydimethylsiloxane pervaporative membranes with hyperbranched polysiloxane as a crosslinker for separation of n-butanol from water. RSC Adv 2015. [DOI: 10.1039/c5ra06886j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Novel hyperbranched polysiloxane crosslinkers, HPSiO, were synthesized to prepare high performance polydimethylsiloxane pervaporation membranes HPSiO-c-PDMS membranes for recoveringn-butanol from aqueous solution by pervaporation.
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Affiliation(s)
- Yunxiang Bai
- The Key Laboratory of Food Colloids and Biotechnology
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122
| | - Liangliang Dong
- The Key Laboratory of Food Colloids and Biotechnology
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122
| | - Jiaqiang Lin
- The Key Laboratory of Food Colloids and Biotechnology
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122
| | - Yuanhua Zhu
- The Key Laboratory of Food Colloids and Biotechnology
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122
| | - Chunfang Zhang
- The Key Laboratory of Food Colloids and Biotechnology
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122
| | - Jin Gu
- The Key Laboratory of Food Colloids and Biotechnology
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122
| | - Yuping Sun
- The Key Laboratory of Food Colloids and Biotechnology
- Ministry of Education
- School of Chemical and Material Engineering
- Jiangnan University
- Wuxi 214122
| | - Youyi Xu
- MOE Key Laboratory of Macromolecule Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- P. R. China
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69
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The use of (green field) biomass pretreatment liquor for fermentative butanol production and the catalytic oxidation of biobutanol. Chem Eng Res Des 2014. [DOI: 10.1016/j.cherd.2014.01.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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70
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Lütke-Eversloh T. Application of new metabolic engineering tools for Clostridium acetobutylicum. Appl Microbiol Biotechnol 2014; 98:5823-37. [DOI: 10.1007/s00253-014-5785-5] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Revised: 04/22/2014] [Accepted: 04/23/2014] [Indexed: 01/30/2023]
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