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Ketonization of fatty acids with TiO2 catalyst as a valorisation strategy to produce bio-based ketones for hydrophobization wax applications.
Bert Boekaerts; Margot Vandeputte; Kranti Navaré; Joost Van Aelst; Karel Van Acker; Jan Cocquyt; Chris Van Caneyt; Peter Van Puyvelde; Bert F. Sels. Assessment of the environmental sustainability of solvent-less fatty acid ketonization to bio-based ketones for wax emulsion applications. Green Chemistry 2021, 1 .
AMA StyleBert Boekaerts, Margot Vandeputte, Kranti Navaré, Joost Van Aelst, Karel Van Acker, Jan Cocquyt, Chris Van Caneyt, Peter Van Puyvelde, Bert F. Sels. Assessment of the environmental sustainability of solvent-less fatty acid ketonization to bio-based ketones for wax emulsion applications. Green Chemistry. 2021; ():1.
Chicago/Turabian StyleBert Boekaerts; Margot Vandeputte; Kranti Navaré; Joost Van Aelst; Karel Van Acker; Jan Cocquyt; Chris Van Caneyt; Peter Van Puyvelde; Bert F. Sels. 2021. "Assessment of the environmental sustainability of solvent-less fatty acid ketonization to bio-based ketones for wax emulsion applications." Green Chemistry , no. : 1.
Circular economy (CE) principles distinguish between technical and biological cycles. Technical cycles involve the management of stocks of non-renewable abiotic resources that cannot be appropriately returned to the biosphere, whereas, biological cycles involve the flows of renewable biotic resources that can safely cycle in and out of the biosphere. Despite this distinction, existing CE monitors are typically developed for technical cycles, and focus mainly on the extent to which resources are looped back in the technosphere. These monitors seem less apt to assess the circularity of biological cycles. This study aims to identify this gap by critically reviewing the CE monitoring criteria and CE assessment tools, and evaluate if they include the four key characteristics of biological cycles. Firstly, biotic resources, although renewable, require to be harvested sustainably. Secondly, while abiotic resources can be restored and recycled to their original quality, biotic resources degrade in quality with every subsequent use and are, hence, cascaded in use. Thirdly, biotic resources should safely return as nutrients to the biosphere to support the regeneration of ecosystems. Fourthly, biological cycles have environmental impacts due to resource extraction, resulting from land-use and resource-depletion and biogenic carbon flows. The CE monitoring criteria lack in thoroughly assessing these characteristics. With the growing demand for biotic resources, the gap in the assessment could exacerbate the overexploitation of natural resources and cause the degradation of ecosystems. The study discusses measures to bridge this gap and suggests ways to design a CE assessment framework that is also apt for biological cycles.
Kranti Navare; Bart Muys; Karl C. Vrancken; Karel Van Acker. Circular economy monitoring – How to make it apt for biological cycles? Resources, Conservation and Recycling 2021, 170, 105563 .
AMA StyleKranti Navare, Bart Muys, Karl C. Vrancken, Karel Van Acker. Circular economy monitoring – How to make it apt for biological cycles? Resources, Conservation and Recycling. 2021; 170 ():105563.
Chicago/Turabian StyleKranti Navare; Bart Muys; Karl C. Vrancken; Karel Van Acker. 2021. "Circular economy monitoring – How to make it apt for biological cycles?" Resources, Conservation and Recycling 170, no. : 105563.
Birch bark was converted to a hydrocarbon biofuel through solubilization and hydrotreatment. The procedure implements a recyclable, salt- and metal-free solvent system and has been evaluated by Life-Cycle Assessment.
Ivan Kumaniaev; Kranti Navare; Natalia Crespo-Mendes; Vincent Placet; Karel Van Acker; Joseph S. M. Samec. Conversion of birch bark to biofuels. Green Chemistry 2020, 22, 2255 -2263.
AMA StyleIvan Kumaniaev, Kranti Navare, Natalia Crespo-Mendes, Vincent Placet, Karel Van Acker, Joseph S. M. Samec. Conversion of birch bark to biofuels. Green Chemistry. 2020; 22 (7):2255-2263.
Chicago/Turabian StyleIvan Kumaniaev; Kranti Navare; Natalia Crespo-Mendes; Vincent Placet; Karel Van Acker; Joseph S. M. Samec. 2020. "Conversion of birch bark to biofuels." Green Chemistry 22, no. 7: 2255-2263.
The profitability and sustainability of future biorefineries are dependent on efficient feedstock use. Therefore, it is essential to valorize lignin when using wood. We have developed an integrated biorefinery that converts 78 weight % (wt %) of birch into xylochemicals. Reductive catalytic fractionation of the wood produces a carbohydrate pulp amenable to bioethanol production and a lignin oil. After extraction of the lignin oil, the crude, unseparated mixture of phenolic monomers is catalytically funneled into 20 wt % of phenol and 9 wt % of propylene (on the basis of lignin weight) by gas-phase hydroprocessing and dealkylation; the residual phenolic oligomers (30 wt %) are used in printing ink as replacements for controversial para-nonylphenol. A techno-economic analysis predicts an economically competitive production process, and a life-cycle assessment estimates a lower carbon dioxide footprint relative to that of fossil-based production.
Yuhe Liao; Steven-Friso Koelewijn; Gil Van Den Bossche; Joost Van Aelst; Sander Van Den Bosch; Tom Renders; Kranti Navare; Thomas Nicolaï; Korneel Van Aelst; Maarten Maesen; Hironori Matsushima; Johan M. Thevelein; Karel Van Acker; Bert Lagrain; Danny Verboekend; Bert F. Sels. A sustainable wood biorefinery for low–carbon footprint chemicals production. Science 2020, 367, 1385 -1390.
AMA StyleYuhe Liao, Steven-Friso Koelewijn, Gil Van Den Bossche, Joost Van Aelst, Sander Van Den Bosch, Tom Renders, Kranti Navare, Thomas Nicolaï, Korneel Van Aelst, Maarten Maesen, Hironori Matsushima, Johan M. Thevelein, Karel Van Acker, Bert Lagrain, Danny Verboekend, Bert F. Sels. A sustainable wood biorefinery for low–carbon footprint chemicals production. Science. 2020; 367 (6484):1385-1390.
Chicago/Turabian StyleYuhe Liao; Steven-Friso Koelewijn; Gil Van Den Bossche; Joost Van Aelst; Sander Van Den Bosch; Tom Renders; Kranti Navare; Thomas Nicolaï; Korneel Van Aelst; Maarten Maesen; Hironori Matsushima; Johan M. Thevelein; Karel Van Acker; Bert Lagrain; Danny Verboekend; Bert F. Sels. 2020. "A sustainable wood biorefinery for low–carbon footprint chemicals production." Science 367, no. 6484: 1385-1390.
It is challenging to quantify the production of wood-based biomass, to define the type and where it comes from, how it is used, and the amount that remains available. This information is crucial for the implementation of national and transnational regulations and is a pillar for the development of the future bio-based circular economy. A variety of studies estimate the production of biomass, performs material flow analyses, or addresses supply chain modelling. These studies are often built upon distinct assumptions, tailored to a specific purpose, and often poorly described. This makes comparison amongst studies, generalization of results, or replication hard to even impossible. This paper presents a comprehensive methodology for wood-based biomass material flow analysis, anchored in Material Flow Analysis, built upon literature review and deducted through systematization of previous studies. This is a five-step approach, consisting of (1) adopt proper terminology; (2) obtain accurate estimates for the biomass flows; (3) Sankey diagram for resource balance representation; (4) scenario analysis; (5) stakeholders validation. The focus is to provide instructions for producing a generalized Sankey diagram, from the categorization of biomass resources, uses/applications in a circular economy setting, towards the development of scenario analysis. Its practical implementation is presented by defining the yearly wood-based biomass resource balance of Portugal and the waste wood resource balance of Flanders. The main data sources for the quantification of the biomass sources and uses/applications are identified. Based on the insights from these case studies, our methodological approach already shows to be replicable and with comparable results. This enables the comparison of resource flows between different regions and countries and also monitoring the progress over time. This leads to improved data which can be instruments for supporting companies’ decision-making processes (e.g., infrastructure investments or other strategic decisions), as well as designing policy strategies and incentives.
Alexandra Marques; Jorge Cunha; Annelies De Meyer; Kranti Navare. Contribution Towards a Comprehensive Methodology for Wood-Based Biomass Material Flow Analysis in a Circular Economy Setting. Forests 2020, 11, 106 .
AMA StyleAlexandra Marques, Jorge Cunha, Annelies De Meyer, Kranti Navare. Contribution Towards a Comprehensive Methodology for Wood-Based Biomass Material Flow Analysis in a Circular Economy Setting. Forests. 2020; 11 (1):106.
Chicago/Turabian StyleAlexandra Marques; Jorge Cunha; Annelies De Meyer; Kranti Navare. 2020. "Contribution Towards a Comprehensive Methodology for Wood-Based Biomass Material Flow Analysis in a Circular Economy Setting." Forests 11, no. 1: 106.