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Energies
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Renewable Resources and Biorefineries 2021
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Renewable Resources and Biorefineries 2021

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A4: Bio-Energy".

Deadline for manuscript submissions: closed (30 April 2022) | Viewed by 9354

Special Issue Editors

Prof. Dr. Luísa Seuanes Serafim

E-Mail Website
Guest Editor
CICECO—Aveiro Institute of Materials, Chemistry Department, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
Interests: polyhydroxyalkanoates; mixed cultures; bioethanol; bacterial cellulose; biorefineries
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Ana Maria Rebelo Barreto Xavier

E-Mail Website
Guest Editor
CICECO–Aveiro Institute of Materials, Chemistry Department, University of Aveiro, Campus Universitario de Santiago, 3810-193 Aveiro, Portugal
Interests: biorefinery; bioprocess of renewable resources for new products; bioethanol and biopolymers production; potentialities of hardwood spent sulfite liquor; laccase production, biocatalyses and immobilization; ligninolytic activity in pulp and paper industry: bleaching processes and effluent cleaning processes
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Worries about climate change call for the substitution of the linear strategy of the economy, based on non-renewable resources via the circular economy concept. Moreover, the current world dependence on oil and other non-renewable resources generates geopolitical instability in producing countries; this often results in the oscillation of its prices, contributing to the economic vulnerability of non-producing countries. The development and establishment of processes that allow for the production of materials and chemicals from renewable resources, especially as the concept of biorefineries has gained worldwide interest since the beginning of the 21st century.

The International Conference on Renewable Resources and Biorefineries (RRB) has been taking place since 2005 and is a gathering of delegates from universities, industry, governmental and non-governmental organizations and venture capital providers. Different perspectives on industrial biotechnology, sustainable (green) chemistry and agricultural policy related to the use of renewable raw materials for non-food applications and energy supply are presented and discussed. The conference aims to provide an overview of the scientific, technical, economic, environmental and social issues of renewable resources and biorefineries, in order to give an impetus to the biobased economy and to present new developments in this area. The 17th edition of the International Conference on Renewable Resources and Biorefineries will take place in September 2021 at the University of Aveiro, Portugal, with the scope “Biobased solutions for climate change”.

This Special Issue intends to cover the latest and most promising results related to energy in one of the conference topics:

-Bio-based and biodegradable materials

- Biocatalysis

- Bioenergy

- Biorefining

- Chemical platform molecules

- CO2 capture and utilization

- Food and agricultural wastes

- Marine bio-economy

- Novel fermentation processes

- Nutrient recycling

- Polysaccharides

- Sustainability analysis

- Wood and forestry

The Special Issue will include papers presented at the congress, which will go through the rigorous peer revision process of the journal.

Prof. Dr. Luísa Seuanes Serafim
Prof. Dr. Ana Maria Rebelo Barreto Xavier
Guest Editors

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 submissions that pass pre-check are 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. Energies is an international peer-reviewed open access semimonthly 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 2600 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.

Keywords

  • Renewable resources
  • Biorefineries
  • Biofuels
  • Waste valorization
  • Bioenergy

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Published Papers (2 papers)

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28 pages, 7870 KiB  
Article
Fast Pyrolysis Oil Upgrading via HDO with Fe-Promoted Nb2O5-Supported Pd-Based Catalysts
by Mariana Myriam Campos Fraga, Bruno Lacerda de Oliveira Campos, Handoyo Hendrawidjaja, Caroline Carriel Schmitt, Klaus Raffelt and Nicolaus Dahmen
Energies 2022, 15(13), 4762; https://doi.org/10.3390/en15134762 - 29 Jun 2022
Cited by 8 | Viewed by 2221
Abstract
Due to the high acid, oxygen and water contents of fast pyrolysis oil, it requires the improvement of its fuel properties by further upgrading, such as catalytic hydrodeoxygenation (HDO). In this study, Nb2O5 was evaluated as a support of Pd-based [...] Read more.
Due to the high acid, oxygen and water contents of fast pyrolysis oil, it requires the improvement of its fuel properties by further upgrading, such as catalytic hydrodeoxygenation (HDO). In this study, Nb2O5 was evaluated as a support of Pd-based catalysts for HDO of fast pyrolysis oil. A Pd/SiO2 catalyst was used as a reference. Additionally, the impact of iron as a promoter in two different loadings was investigated. The activity of the synthesized catalysts was evaluated in terms of H2 uptake and composition of the upgraded products (gas phase, upgraded oil and aqueous phase) through elemental analysis, Karl Fischer titration, GC-MS/FID and 1H-NMR. In comparison to SiO2, due to its acid sites, Nb2O5 enhanced the catalyst activity towards hydrogenolysis and hydrogenation, confirmed by the increased water formation during HDO and a higher content of hydrogen and aliphatic protons in the upgraded oil. Consequently, the upgraded oil with Nb2O5 had a lower average molecular weight and was therefore less viscous than the oil obtained with SiO2. When applied as a promoter, Fe enhanced hydrogenation and hydrogenolysis, although it slightly decreased the acidity of the support, owing to its oxophilic nature, leading to the highest deoxygenation degree (42.5 wt.%) and the highest product HHV (28.2 MJ/kg). Full article
(This article belongs to the Special Issue Renewable Resources and Biorefineries 2021)
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Review

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31 pages, 762 KiB  
Review
Getting Value from Pulp and Paper Industry Wastes: On the Way to Sustainability and Circular Economy
by Mariana S. T. Amândio, Joana M. Pereira, Jorge M. S. Rocha, Luísa S. Serafim and Ana M. R. B. Xavier
Energies 2022, 15(11), 4105; https://doi.org/10.3390/en15114105 - 2 Jun 2022
Cited by 15 | Viewed by 6159
Abstract
The pulp and paper industry is recognized as a well-established sector, which throughout its process, generates a vast amount of waste streams with the capacity to be valorized. Typically, these residues are burned for energy purposes, but their use as substrates for biological [...] Read more.
The pulp and paper industry is recognized as a well-established sector, which throughout its process, generates a vast amount of waste streams with the capacity to be valorized. Typically, these residues are burned for energy purposes, but their use as substrates for biological processes could be a more efficient and sustainable alternative. With this aim, it is essential to identify and characterize each type of waste to determine its biotechnological potential. In this context, this research highlights possible alternatives with lower environmental impact and higher revenues. The bio-based pathway should be a promising alternative for the valorization of pulp and paper industry wastes, in particular for bioproduct production such as bioethanol, polyhydroxyalkanoates (PHA), and biogas. This article focuses on state of the art regarding the identification and characterization of these wastes, their main applied deconstruction technologies and the valorization pathways reported for the production of the abovementioned bioproducts. Full article
(This article belongs to the Special Issue Renewable Resources and Biorefineries 2021)
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