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Special Issue "Sustainable Catalytic Conversion of Biomass for the Production of Biofuels and Bioproducts"
Deadline for manuscript submissions: 31 December 2019.
Biomass is widely considered a potential alternative to dwindling fossil fuel reserves. There is a large variety of biomass sources (oleaginous, lignocellulosic, algae, etc.), with many possible conversion routes and products, and currently it is, not just viewed as a source of biofuels, but also as an interesting feedstock for the production of bio-based chemicals that could largely replace petrochemicals. In this context, the search for new sustainable and efficient alternatives to fossil sources is gaining increasing relevance within the chemical industry, wherein the role of catalysis is often critical for the development of clean and sustainable processes, aiming to the production of commodity chemicals or liquid fuels with a high efficiency and atom economy.
This Special Issue embraces original research papers, reviews and commentaries focused on the current challenges in the catalytic valorization and conversion of biomass sources. Submissions are welcome especially, though not exclusively, in the following areas:
- Fundamentals and applied catalysis in the context of biorefineries.
- Catalytic routes for direct polysaccharides, lignin, and raw biomass transformation.
- Catalytic transformation of lignocellulosic platform chemicals.
- Catalytic transformation of vegetable oils, fats, algae and oleaginous chemicals.
- Catalytic upgrading technologies for bio-oils.
- Modeling aspects of the processes and mechanistic studies.
- Molecular insights in processing of biomass.
- Development of analytic tools, in situ characterization techniques.
Dr. Gabriel Morales
Dr. Jose Iglesias
Prof. Juan A. Melero
Manuscript Submission Information
Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.
Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Catalysts is an international peer-reviewed open access monthly journal published by MDPI.
Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.
- Biomass conversion
- Platform molecules
- Vegetable oils
- Biorefinery processes
The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.
Title: 5-Chloromethylfurfural production from glucose: A pioneer kinetic model development exploring the mechanism
Authors: Amal J. Chennattussery, Ajit Haridas, Churchil A. Antonyraj*
Affiliation: CSIR-National Institute for Interdisciplinary Science and Technology. Thiruvananthapuram PIN: 695019
E-mail: [email protected]
Abstract: Conversion of glucose to 5-chloromethylfurfural (CMF) is one of the well-known high yield unit processes for the ligno-cellulosic biomass valorization. Owing to the complexity in quantification of CMF, an experimental kinetic modeling study has to understand the mechanism never been reported for this reaction. Herein we have been successful in developing a rapid, sensitive, specific, reverse phase HPLC method to quantify generated CMF (range: 10 µg/mL - 650 µg/mL) in the dichloroethane (DCE) solvent. The Box-Behnken design of experiment (DOE) approach was used for the statistical optimization and kinetic model was developed based on the homogeneous first-order kinetics and the results are in good agreement with the experiment data. The mechanism of CMF formation glucose and HCl were modeled first time using a serial parallel reaction mechanism. The apparent activation energy (Ea) for glucose decomposition and CMF formation are 86 and 17 kJ/mol respectively.
Title: C-O hydrogenolysis of sugar polyols and sugars using ReOx-Rh/ZrO2 catalyst. Application to mixtures and to a hemicellulose extraction liquor
Authors: Michèle Besson [email protected]; Noemie Perret [email protected]; Catherine Pinel <[email protected]>
Abstract: Appropriate utilization of abundant hemicelluloses to prepare valuable chemicals is a key step in order to make lignocellulosic biomass conversion a cost effective process in a biorefinery. Catalytic hydrogenolysis of aqueous solutions of C5-C6 sugar polyols and sugars, alone or in different compositions, to linear deoxygenated polyols were compared over ReOx-Rh/ZrO2. The hydrogenolysis of an hemicellulose liquor extracted from maritime pine was then performed.
Title: "Mini-review of in situ methods of catalyst characterisation relevant to biomass transformations"
Description: This paper focused on in-situ methods of acid and base characterisation that move beyond conventional NH3 and CO2 titration.
Tentative title: Sulfonated hydrothermal carbons as catalysts for glycerol ketalization
Authors: Pablo Fernándeza, José M. Fraileb, Enrique García-Bordejéc, Raúl Grimaa, Elísabet Pires*a,b
Affiliations: a Departamento de Química Orgánica. Facultad de Ciencias. Universidad de Zaragoza. C/ Pedro Cerbuna, 12. E-50009 Zaragoza, Spain
b Instituto de Síntesis Química y Catálisis Homogénea (ISQCH). CSIC-Universidad de Zaragoza. C/ Pedro Cerbuna, 12. E-50009 Zaragoza, Spain
c Instituto de Carboquímica (ICB-CSIC). C/ Miguel Luesma Castán 4. E-50018 Zaragoza, Spain
Abstract: The substitution of conventional solvents in industrial processes and different applications is a relevant topic nowadays in order to overcome some of their main drawbacks, such as their (eco)toxicity, volatility or flammability. Among the different proposals, the use of glycerol and its derivatives as renewable solvents has attracted a great attention in the last decade1,2 and in particular glycerol carbonate3 and solketal4 can be considered the most popular glycerol derived solvents up to now.
In order to envisage the possibility of producing large amounts of solketal, a sustainable synthetic methodology must be developed and thus many works have been published so far related to the study of different catalytic systems for the reaction of glycerol with acetone.5
Scheme 1: Synthesis of solketal
Many efforts have been devoted in searching efficient heterogeneous catalysts for this reaction, as the use of homogeneous acid catalysts implies a work-up of the reaction that derives in a large transfer of the ketal to the aqueous phase, and thus a seriously lowering of the global isolated ketal yield.
Over the different catalytic systems, sulfonic solids such as Amberlyst 156 or SBA-157 have been described as effective catalysts for solketal production. An interesting point when developing sustainable processes is the possibility of using heterogeneous catalysts coming also from renewable raw materials. This is the case of carbons. Thus sulfonated activated carbon8 and hydrothermal carbon prepared from glycerine as biodiesel waste9 have been proposed as catalysts in the reaction of glycerol and acetone.
In this work, we present the study of the synthesis of solketal catalyzed by sulfonated hydrothermal carbons. Hydrothermal carbons from glucose and cellulose have been prepared with different textural properties depending on the hydrothermal treatment conditions.10 Sulfonation of these carbons provides active catalysts for the synthesis of solketal, Thus, up to nine different sulfonated carbons have been tested, their activity has been compared with sulfonic resins such as Amberlyst 15, Dowex 50W×2 or SAC13.
The study of the recoverability of the solids will be also presented. In this case, an influence of the preparation parameters of the catalyst on the activity of the solids upon reuse has been observed.
Title: Clean up and Conversion of Biomass Liquefaction Aqueous Phase to Olefins over ZnxZryOz Catalyst
Authors: Robert A Dagle [email protected], Stephen D Davidson [email protected]
Abstract: The viability of using a previously studied ZnxZryOz catalyst for the direct production of olefins from aqueous phase bio-oil feedstocks was explored. In this work, we looked at three different bio-mass derived aqueous phases: hydrothermal liquefaction of cornstover (PNNL), fluidized bed fast pyrolysis of horse litter (USDA), and screw pyrolysis of wood pellets (KIT). While overall composition varied for each feedstock, the main components for each were the carboxylic acids: acetic acid and propionic acid. Expanding on a previously reported clean-up process, a continuous liquid-liquid extraction process was developed instead of a batch process. Complete conversion of the carboxylic acids over the ZnxZryOz catalyst was achieved for all feedstocks. The main product for all feedstocks was isobutene, followed by CO2. The effect of gas environment was also studied. By changing the carrier gas from N2 to H2, the selectivity to propene was increased while selectivity to isobutene decreased.
Tentative title: Kinetics of enzymatic esterification of mammalian fat for acidity reduction
Authors: António A. Martins, Soraia Andrade, Daniela Correia, Elisabete Matos, Nídia S. Caetano, Teresa M. Mata