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Monteiro CRM, Rodrigues LGG, Cesca K, Poletto P. Evaluation of hydrothermal sugarcane bagasse treatment for the production of xylooligosaccharides in different pressures. J FOOD PROCESS ENG 2022. [DOI: 10.1111/jfpe.13965] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Carla Roana M. Monteiro
- Laboratory of Biological Engineering, Department of Chemical and Food Engineering Federal University of Santa Catarina Florianópolis Santa Catarina Brazil
| | - Luiz Gustavo G. Rodrigues
- Laboratory of Biological Engineering, Department of Chemical and Food Engineering Federal University of Santa Catarina Florianópolis Santa Catarina Brazil
| | - Karina Cesca
- Laboratory of Biological Engineering, Department of Chemical and Food Engineering Federal University of Santa Catarina Florianópolis Santa Catarina Brazil
| | - Patrícia Poletto
- Laboratory of Biological Engineering, Department of Chemical and Food Engineering Federal University of Santa Catarina Florianópolis Santa Catarina Brazil
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Paini J, Benedetti V, Menin L, Baratieri M, Patuzzi F. Subcritical water hydrolysis coupled with hydrothermal carbonization for apple pomace integrated cascade valorization. BIORESOURCE TECHNOLOGY 2021; 342:125956. [PMID: 34852438 DOI: 10.1016/j.biortech.2021.125956] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 09/09/2021] [Accepted: 09/12/2021] [Indexed: 06/13/2023]
Abstract
This study evaluates an integrated biorefinery approach based on the waste hierarchy for the valorization of biodegradable waste, focusing on apple processing residues. Firstly, subcritical water hydrolysis was investigated at different experimental conditions (temperature 80 to 120 °C, dilution factor 10 to 30, residence time 10 to 30 min, initial pressure 10 to 30 bar) with the coincident aim of dissolving fermentable sugars and assess the effects of such treatment on the downstream solids. Secondly, spent solids were further processed by hydrothermal carbonization in the same reactor at fixed conditions (i.e., 180 °C, 3 h). The results showed that not only up to nearly 500 g kgdb-1 of sugars are dissolved but also lignocellulosic structure is amended, improving products valorization potential. Depending on pretreatment conditions, the proposed approach can deliver hydrochar with potential either as soil amendment or for long-term applications, sustainably valorizing food waste.
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Affiliation(s)
- Jacopo Paini
- Free University of Bozen-Bolzano, Piazza Università 1, 39100 Bolzano, Italy.
| | - Vittoria Benedetti
- Free University of Bozen-Bolzano, Piazza Università 1, 39100 Bolzano, Italy
| | - Lorenzo Menin
- Free University of Bozen-Bolzano, Piazza Università 1, 39100 Bolzano, Italy
| | - Marco Baratieri
- Free University of Bozen-Bolzano, Piazza Università 1, 39100 Bolzano, Italy
| | - Francesco Patuzzi
- Free University of Bozen-Bolzano, Piazza Università 1, 39100 Bolzano, Italy
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3
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Vodo S, Uemura K, Nakajima M, Neves MA. Conversion of aqueous extracts from thermochemical treatment of bagasse into functional emulsifiers. Int J Food Sci Technol 2021. [DOI: 10.1111/ijfs.15385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Sekove Vodo
- Tsukuba Life Science Innovation Program (T‐LSI) University of Tsukuba 1‐1‐1 Tennodai Tsukuba Ibaraki 305‐8572 Japan
| | - Kunihiko Uemura
- Food Research Institute NARO 2‐1‐12 Kannondai Tsukuba Ibaraki 305‐8642 Japan
| | - Mitsutoshi Nakajima
- Tsukuba Life Science Innovation Program (T‐LSI) University of Tsukuba 1‐1‐1 Tennodai Tsukuba Ibaraki 305‐8572 Japan
- Faculty of Life and Environmental Sciences University of Tsukuba 1‐1‐1 Tennodai Tsukuba Ibaraki 305‐8572 Japan
| | - Marcos A. Neves
- Tsukuba Life Science Innovation Program (T‐LSI) University of Tsukuba 1‐1‐1 Tennodai Tsukuba Ibaraki 305‐8572 Japan
- Faculty of Life and Environmental Sciences University of Tsukuba 1‐1‐1 Tennodai Tsukuba Ibaraki 305‐8572 Japan
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4
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Reaction network and kinetics for the one-pot hydrogenolysis of cellulose to ethylene glycol over NiOx-WOy-Cu/MgAl2O4. REACTION KINETICS MECHANISMS AND CATALYSIS 2021. [DOI: 10.1007/s11144-021-01975-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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6
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Effect of Severity Factor on the Subcritical Water and Enzymatic Hydrolysis of Coconut Husk for Reducing Sugar Production. BULLETIN OF CHEMICAL REACTION ENGINEERING & CATALYSIS 2020. [DOI: 10.9767/bcrec.15.3.8870.786-797] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Preventing the further degradation of monomeric or oligomeric sugar into by-product during biomass conversion is one of the challenges for fermentable sugar production. In this study, the performance of subcritical water (SCW) and enzymatic hydrolysis of coconut husk toward reducing sugar production was investigated using a severity factor (SF) approach. Furthermore, the optimal condition of SCW was optimized using response surface methodology (RSM), where the composition changes of lignocellulose and sugar yield as responses. From the results, at low SF of SCW, sugar yield escalated as increasing SF value. In the enzymatic hydrolysis process, the effect of SCW pressure is a significant factor enhancing sugar yield. A maximum total sugar yield was attained on the mild SF condition of 2.86. From this work, it was known that the SF approach is sufficient parameter to evaluate the SCW and enzymatic hydrolysis of coconut husk. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
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7
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Shen J, Li K, Muhammad Y, Zhang N, Guo X, Subhan S, Lan C, Liu K, Huang F. Removal of Cu(II) ions from simulated wastewater using bagasse pith grafted polyacrylamide copolymer. Chem Eng Res Des 2020. [DOI: 10.1016/j.cherd.2020.09.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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8
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Li H, Wu H, Yu Z, Zhang H, Yang S. CO 2 -Enabled Biomass Fractionation/Depolymerization: A Highly Versatile Pre-Step for Downstream Processing. CHEMSUSCHEM 2020; 13:3565-3582. [PMID: 32285649 DOI: 10.1002/cssc.202000575] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 04/11/2020] [Indexed: 06/11/2023]
Abstract
Lignocellulosic biomass is inevitably subject to fractionation and depolymerization processes for enhanced selectivity toward specific products, in most cases prior to catalytic upgrading of the three main fractions-cellulose, hemicellulose, and lignin. Among the developed pretreatment techniques, CO2 -assisted biomass processing exhibits some unique advantages such as the lowest critical temperature (31.0 °C) with moderate critical pressure, low cost, nontoxicity, nonflammability, ready availability, and the addition of acidity, alongside easy recovery by pressure release. This Review showcases progress in the study of sub- or supercritical CO2 -mediated thermal processing of lignocellulosic biomass-the key pre-step for downstream conversion processes. The auxo-action of CO2 in biomass pretreatment and fractionation, along with the involved variables, direct degradation of untreated biomass in CO2 by gasification, pyrolysis, and liquefaction with relevant conversion mechanisms, and CO2 -enabled depolymerization of lignocellulosic fractions with representative reaction pathways are summarized. Moreover, future prospects for the practical application of CO2 -assisted up- and downstream biomass-to-bioproduct conversion are also briefly discussed.
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Affiliation(s)
- Hu Li
- State Key Laboratory Breeding Base of Green Pesticide & Agricultural Bioengineering, Key Laboratory of Green Pesticide & Agricultural Bioengineering, Ministry of Education, State-Local Joint Laboratory for Comprehensive Utilization of Biomass, Center for Research & Development of Fine Chemicals, Guizhou University, Guiyang, Guizhou, 550025, P.R. China
| | - Hongguo Wu
- State Key Laboratory Breeding Base of Green Pesticide & Agricultural Bioengineering, Key Laboratory of Green Pesticide & Agricultural Bioengineering, Ministry of Education, State-Local Joint Laboratory for Comprehensive Utilization of Biomass, Center for Research & Development of Fine Chemicals, Guizhou University, Guiyang, Guizhou, 550025, P.R. China
| | - Zhaozhuo Yu
- State Key Laboratory Breeding Base of Green Pesticide & Agricultural Bioengineering, Key Laboratory of Green Pesticide & Agricultural Bioengineering, Ministry of Education, State-Local Joint Laboratory for Comprehensive Utilization of Biomass, Center for Research & Development of Fine Chemicals, Guizhou University, Guiyang, Guizhou, 550025, P.R. China
| | - Heng Zhang
- State Key Laboratory Breeding Base of Green Pesticide & Agricultural Bioengineering, Key Laboratory of Green Pesticide & Agricultural Bioengineering, Ministry of Education, State-Local Joint Laboratory for Comprehensive Utilization of Biomass, Center for Research & Development of Fine Chemicals, Guizhou University, Guiyang, Guizhou, 550025, P.R. China
| | - Song Yang
- State Key Laboratory Breeding Base of Green Pesticide & Agricultural Bioengineering, Key Laboratory of Green Pesticide & Agricultural Bioengineering, Ministry of Education, State-Local Joint Laboratory for Comprehensive Utilization of Biomass, Center for Research & Development of Fine Chemicals, Guizhou University, Guiyang, Guizhou, 550025, P.R. China
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9
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Pitfalls in the 3, 5-dinitrosalicylic acid (DNS) assay for the reducing sugars: Interference of furfural and 5-hydroxymethylfurfural. Int J Biol Macromol 2020; 156:180-185. [PMID: 32289426 DOI: 10.1016/j.ijbiomac.2020.04.045] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 03/21/2020] [Accepted: 04/03/2020] [Indexed: 11/21/2022]
Abstract
Transformation of renewable biomass into value-added chemicals and biofuels has evolved to be a vital field of research in recent years. Accurate estimation of reducing sugars post pretreatment of lignocellulosic biomass has been very inconsistent. For a few decades, 3,5-dinitrosalicylic acid (DNS) assay has been widely employed for the estimation of reducing sugars derived from pretreatment of lignocellulosic biomass. This assay tests for the presence of free carbonyl group (C=O), the so-called reducing sugars. This involves the oxidation of the aldehyde functional group present to the corresponding acid while DNS is simultaneously reduced to 3-amino-5-nitrosalicylic acid under alkaline conditions. However, the presence of other active carbonyl groups can potentially also react with DNS leading to incorrect yields of reducing sugars. Therefore, a detailed study has been carried out to evaluate the influence of active carbonyl compounds like furfural and 5-hydroxymethylfurfural (5-HMF) in the overall estimation of reducing sugars (glucose, xylose and arabinose) by DNS assay. In addition to this, reducing sugars estimation in the presence of furans were also investigated, it reveals that reducing sugars estimation was found to be 68% higher than actual sugars. Therefore, current findings strongly indicate that the employment of DNS assay for quantifying the reducing sugars in the presence of furans is not appropriate.
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Bhatia SK, Jagtap SS, Bedekar AA, Bhatia RK, Patel AK, Pant D, Rajesh Banu J, Rao CV, Kim YG, Yang YH. Recent developments in pretreatment technologies on lignocellulosic biomass: Effect of key parameters, technological improvements, and challenges. BIORESOURCE TECHNOLOGY 2020; 300:122724. [PMID: 31926792 DOI: 10.1016/j.biortech.2019.122724] [Citation(s) in RCA: 207] [Impact Index Per Article: 51.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 12/27/2019] [Accepted: 12/30/2019] [Indexed: 05/12/2023]
Abstract
Lignocellulosic biomass is an inexpensive renewable source that can be used to produce biofuels and bioproducts. The recalcitrance nature of biomass hampers polysaccharide accessibility for enzymes and microbes. Several pretreatment methods have been developed for the conversion of lignocellulosic biomass into value-added products. However, these pretreatment methods also produce a wide range of secondary compounds, which are inhibitory to enzymes and microorganisms. The selection of an effective and efficient pretreatment method discussed in the review and its process optimization can significantly reduce the production of inhibitory compounds and may lead to enhanced production of fermentable sugars and biochemicals. Moreover, evolutionary and genetic engineering approaches are being used for the improvement of microbial tolerance towards inhibitors. Advancements in pretreatment and detoxification technologies may help to increase the productivity of lignocellulose-based biorefinery. In this review, we discuss the recent advancements in lignocellulosic biomass pretreatment technologies and strategies for the removal of inhibitors.
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Affiliation(s)
- Shashi Kant Bhatia
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea; Institute for Ubiquitous Information Technology and Application, Konkuk University, Seoul 05029, Republic of Korea
| | - Sujit Sadashiv Jagtap
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, 600 S. Mathews Ave, Urbana, IL 61801, USA; DOE Center for Advanced Bioenergy and Bioproducts Innovation, University of Illinois at Urbana-Champaign, 600 S. Mathews Ave, Urbana, IL 61801, USA
| | - Ashwini Ashok Bedekar
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, 600 S. Mathews Ave, Urbana, IL 61801, USA
| | - Ravi Kant Bhatia
- Department of Biotechnology, Himachal Pradesh University, Summer Hill-171005 (H.P), India
| | - Anil Kumar Patel
- Department of Chemical and Biological Engineering, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Deepak Pant
- Department of Chemistry, Central University of Haryana, Mahendragarh, Haryana 123031, India
| | - J Rajesh Banu
- Department of Civil Engineering, Anna University Regional Campus, Tirunelveli, India
| | - Christopher V Rao
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, 600 S. Mathews Ave, Urbana, IL 61801, USA; DOE Center for Advanced Bioenergy and Bioproducts Innovation, University of Illinois at Urbana-Champaign, 600 S. Mathews Ave, Urbana, IL 61801, USA
| | - Yun-Gon Kim
- Department of Chemical Engineering, Soongsil University, 06978 Seoul, Republic of Korea
| | - Yung-Hun Yang
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea; Institute for Ubiquitous Information Technology and Application, Konkuk University, Seoul 05029, Republic of Korea.
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11
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Antunes FAF, Chandel AK, Terán-Hilares R, Ingle AP, Rai M, Dos Santos Milessi TS, da Silva SS, Dos Santos JC. Overcoming challenges in lignocellulosic biomass pretreatment for second-generation (2G) sugar production: emerging role of nano, biotechnological and promising approaches. 3 Biotech 2019; 9:230. [PMID: 31139545 DOI: 10.1007/s13205-019-1761-1] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Accepted: 05/13/2019] [Indexed: 01/12/2023] Open
Abstract
Production of green chemicals and biofuels in biorefineries is the potential alternative for petrochemicals and gasoline in transitioning of petro-economy into bioeconomy. However, an efficient biomass pretreatment process must be considered for the successful deployment of biorefineries, mainly for use of lignocellulosic raw materials. However, biomass recalcitrance plays a key role in its saccharification to obtain considerable sugar which can be converted into ethanol or other biochemicals. In the last few decades, several pretreatment methods have been developed, but their feasibility at large-scale operations remains as a persistent bottleneck in biorefineries. Pretreatment methods such as hydrodynamic cavitation, ionic liquids, and supercritical fluids have shown promising results in terms of either lignin or hemicellulose removal, thus making remaining carbohydrate fraction amenable to the enzymatic hydrolysis for clean and high amount of fermentable sugar production. However, their techno-economic feasibility at industrial scale has not been yet studied in detail. Besides, nanotechnological-based technologies could play an important role in the economically viable 2G sugar production in future. Considering these facts, in the present review, we have discussed the existing promising pretreatment methods for lignocellulosic biomass and their challenges, besides this strategic role of nano and biotechnological approaches towards the viability and sustainability of biorefineries is also discussed.
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Affiliation(s)
- Felipe Antonio Fernandes Antunes
- 1Department of Biotechnology, Engineering School of Lorena, University of São Paulo, Estrada Municipal do Campinho, s/n-Campinho, Lorena, 12602-810 Brazil
| | - Anuj Kumar Chandel
- 1Department of Biotechnology, Engineering School of Lorena, University of São Paulo, Estrada Municipal do Campinho, s/n-Campinho, Lorena, 12602-810 Brazil
| | - Ruly Terán-Hilares
- 1Department of Biotechnology, Engineering School of Lorena, University of São Paulo, Estrada Municipal do Campinho, s/n-Campinho, Lorena, 12602-810 Brazil
| | - Avinash P Ingle
- 3Nanotechnology Laboratory, Department of Biotechnology, SGB Amravati University, Amravati, 444 602 India
| | - Mahendra Rai
- 3Nanotechnology Laboratory, Department of Biotechnology, SGB Amravati University, Amravati, 444 602 India
| | | | - Silvio Silvério da Silva
- 1Department of Biotechnology, Engineering School of Lorena, University of São Paulo, Estrada Municipal do Campinho, s/n-Campinho, Lorena, 12602-810 Brazil
| | - Júlio César Dos Santos
- 1Department of Biotechnology, Engineering School of Lorena, University of São Paulo, Estrada Municipal do Campinho, s/n-Campinho, Lorena, 12602-810 Brazil
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12
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Fractionation of Lignocellulosic Biomass by Selective Precipitation from Ionic Liquid Dissolution. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9091862] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We propose the treatment of barley straw with 1-ethyl-3-methylimidazolium acetate [EMIMAcO] ionic liquids (ILs) and subsequent precipitation with antisolvent mixtures, thus allowing the separation of the sugar-rich fractions (cellulose and hemicellulose) from the lignin fraction. For this purpose, different concentration ranges of acetone:water antisolvent mixtures were studied. In all cases, a high recovery percentage and a high and effective separation of fractions was achieved for 1:1 acetone:water. The fractionated lignocellulosic compounds were studied by using infrared spectroscopy, scanning electron microscopy and 1H nuclear magnetic resonance characterization techniques. This method allows the possibility of reusing IL, confirming the versatility of the established method. The fraction rich in cellulose and hemicellulose was subjected to acid hydrolysis (0.2 mol/L H2SO4) for 5 h at 140 °C, obtaining a yield of total reducing sugars of approximately 80%, much higher than those obtained in non-pretreated samples.
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Wu K, Feng G, Liu Y, Liu C, Zhang X, Liu S, Liang B, Lu H. Enhanced hydrolysis of mechanically pretreated cellulose in water/CO 2 system. BIORESOURCE TECHNOLOGY 2018; 261:28-35. [PMID: 29653331 DOI: 10.1016/j.biortech.2018.03.098] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Revised: 03/17/2018] [Accepted: 03/19/2018] [Indexed: 06/08/2023]
Abstract
The aim of this work was to study promotion of ball milling and CO2 assistance on cellulose hydrolysis kinetics in water medium. Kinetic behaviors were analyzed based on first-order and shrinking core models. The results showed that cellulose hydrolysis is enhanced by ball milling and CO2 assistance. Ball milling reduced crystallinity and particle size of cellulose, resulting in high cellulose conversion, while hydrolysis promoted by CO2 assistance was weaker. Double-layer hydrolysis was observed for ball-milled cellulose, and rate constant in active layer is higher. Based on double-layer shrinking core model (DL-SCM), activation energy of cellulose conversion decreased from 73.6 to 39.8 kJ/mol when ball milling and CO2 assistance were applied. Hydrolysis active layer was about 0.9 μm, representing activated thickness of ball-milled cellulose. Hydrolysis promotion by crystallinity and particle size reduction was distinguished via DL-SCM, and crystal evolution possesses greater improvement than particle size decrease on hydrolysis of ball-milled cellulose.
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Affiliation(s)
- Kejing Wu
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, China
| | - Guangrong Feng
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, China
| | - Yingying Liu
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, China
| | - Changjun Liu
- School of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Xingyilong Zhang
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, China
| | - Shijie Liu
- Department of Paper and Bioprocess Engineering, State University of New York College of Environmental Science and Forestry, Syracuse, NY 13210, USA
| | - Bin Liang
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, China; School of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Houfang Lu
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, China; School of Chemical Engineering, Sichuan University, Chengdu 610065, China.
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Zhou D, Wang L, Chen X, Wei X, Liang J, Zhang D, Ding G. A novel acid catalyst based on super/subcritical CO 2-enriched water for the efficient esterification of rosin. ROYAL SOCIETY OPEN SCIENCE 2018; 5:171031. [PMID: 30109033 PMCID: PMC6083657 DOI: 10.1098/rsos.171031] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Accepted: 06/04/2018] [Indexed: 06/08/2023]
Abstract
Rosin esters are widely applied as masticatory substances and beverage stabilizers, while classical acid-catalysed processes will lead to metal residue or environmental issues. Super/subcritical CO2-enriched high temperature liquid water (HTLW) as a green acid catalyst in the esterification reaction of rosin with glycerol was investigated. The pH of CO2-H2O binary system, as calculated based on gas-liquid equilibrium, charge balance and chemical equilibrium equations, ranged from 3.49 to 3.70 depending on the reaction conditions, indicating effective acid catalysis. Response surface methodology experiments showed the optimum conditions were 3.5 h, 3.9 MPa CO2 pressure, a rosin-to-glycerol molar ratio of 1.32 and 269°C, and an enhanced esterification yield of 94.74% was achieved, which was superior to that obtained using a ZnO catalyst. It was found that the esterification kinetics was a pseudo first-order reaction, and the enthalpy and entropy of activation were calculated using the Arrhenius-Polanyi equation. The presence of super/subcritical CO2-enriched HTLW catalyst can decrease the activation energy and significantly accelerate the reaction rate.
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Affiliation(s)
- Dan Zhou
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, People's Republic of China
| | - Linlin Wang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, People's Republic of China
- Guangxi Key Laboratory of Petrochemical Resources Processing and Process Intensification Technology, Guangxi University, Nanning 53004, People's Republic of China
| | - Xiaopeng Chen
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, People's Republic of China
- Guangxi Key Laboratory of Petrochemical Resources Processing and Process Intensification Technology, Guangxi University, Nanning 53004, People's Republic of China
| | - Xiaojie Wei
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, People's Republic of China
- Guangxi Key Laboratory of Petrochemical Resources Processing and Process Intensification Technology, Guangxi University, Nanning 53004, People's Republic of China
| | - Jiezhen Liang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, People's Republic of China
- Guangxi Key Laboratory of Petrochemical Resources Processing and Process Intensification Technology, Guangxi University, Nanning 53004, People's Republic of China
| | - Dong Zhang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, People's Republic of China
| | - Guoxin Ding
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, People's Republic of China
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15
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Jiang Z, Zhao P, Hu C. Controlling the cleavage of the inter- and intra-molecular linkages in lignocellulosic biomass for further biorefining: A review. BIORESOURCE TECHNOLOGY 2018; 256:466-477. [PMID: 29478782 DOI: 10.1016/j.biortech.2018.02.061] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 02/08/2018] [Accepted: 02/13/2018] [Indexed: 06/08/2023]
Abstract
The abundant intermolecular linkages among cellulose, hemicellulose and lignin significantly limit the utilization of the most promising renewable biomass. Process control with solvents, catalysts and temperature is of significant importance providing ways to break the above linkages, and benefiting to the further conversion of the main biomass components to small molecular products. This article discusses the effect of catalyst under hydrothermal and organosolv treatment emphasizing the cleavage of the intermolecular linkage. Acidic catalysts show good performance on cleaving the linkages between carbohydrates and lignin. Basic catalysts promoted the dissolution of lignin component. Hydrogenolysis assisted conversion of lignin can efficiently break the intermolecular linkages to yield lignin-derived bio-oil, especially in co-solvent reaction system. Besides, the effects of single solvent and co-solvent systems, as well as the cleavage of the intramolecular linkages to yield target chemicals are also included. Several further study strategies are proposed.
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Affiliation(s)
- Zhicheng Jiang
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, Sichuan, China
| | - Pingping Zhao
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, Sichuan, China
| | - Changwei Hu
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, Sichuan, China.
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Gharib-Bibalan S. High Value-added Products Recovery from Sugar Processing By-products and Residuals by Green Technologies: Opportunities, Challenges, and Prospects. FOOD ENGINEERING REVIEWS 2018. [DOI: 10.1007/s12393-018-9174-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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