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Processes
Special Issues
State of the Art of Bio-Oil Production and Processing
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State of the Art of Bio-Oil Production and Processing

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Environmental and Green Processes".

Deadline for manuscript submissions: closed (10 August 2022) | Viewed by 5041

Special Issue Editors

Prof. Dr. J.C. Bordado

E-Mail Website
Guest Editor
Centre for Natural Resources and the Environment (CERENA), Instituto Superior Técnico da Universidade de Lisboa, 1049-001 Lisbon, Portugal
Interests: polymers; biomass valorization; liquefaction; biomass conversion; sustainable materials and energy
Dr. Rui Galhano dos Santos

E-Mail Website1 Website2
Guest Editor
CERENA, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, Lisboa, Portugal
Interests: biomass and wastes conversion and valorization; bio-based chemicals and products; bio-based polymers
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Claudia Irina Koncsag

E-Mail Website
Guest Editor
Chemistry and Chemical Engineering Department, Faculty of Applied Sciences and Engineering, Ovidius University of Constanta, 900527 Constanta, Romania
Interests: chemical engineering; mass transfer; separation processes; chemical process simulation

Special Issue Information

Dear Colleagues,

Biomass can be exploited to produce bio-oil, a straightforward alternative raw material for fossil sources. Bio-oil can be used to separate different bio-chemicals or as energy carriers. The main processes that convert biomass into bio-oil are fast pyrolysis, direct liquefaction, and hydrothermal liquefaction.

Scientific and technological developments regarding bio-oil production and quality have been conducted, stressing out the bio-oil applications and upgrading. Generally, the research on bio-oil features its production from biomass (composition and chemistry), application, environmental and economic issues and impact.

This Special Issue on “State of the Art of Bio-Oil Production and Processing” aims to present outstanding research and the comprehensive coverage of all aspects related to bio-oil. The Special Issue targets the production and conversion technology, namely, the technologies and methodologies to produce bio-oil from natural feedstocks in sustainable, economically, and environmentally responsible ways, as well as to cover the work regarding its applications.

This Special Issue will bring together high-quality research papers on the different aspects of bio-oils, including forthcoming challenges. Reviews on the status quo and emerging topics are also welcome. Topics include but not are limited to:

  • Bio-oil production techniques;
  • Bio-oil characterization;
  • Bio-oil applications;
  • Feedstock for bio-oil production;
  • Bio-based materials from bio-oil.

Prof. Dr. J.C. Bordado
Dr. Rui Galhano dos Santos
Prof. Dr. Claudia Irina Koncsag
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. Processes 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 2400 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

  • bio-oil
  • biomass conversion
  • bio-oil characterization
  • bio-oil application
  • bio-based materials
  • bio-oil upgrading
  • bio-oil processing

Published Papers (2 papers)

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Research

17 pages, 5642 KiB  
Article
Valorization of Vine Prunings by Slow Pyrolysis in a Fixed-Bed Reactor
by Suzana Ioana Calcan, Oana Cristina Pârvulescu, Violeta Alexandra Ion, Cristian Eugen Răducanu, Liliana Bădulescu, Tănase Dobre, Diana Egri, Andrei Moț, Vlad Popa and Mihaela Emanuela Crăciun
Processes 2022, 10(1), 37; https://doi.org/10.3390/pr10010037 - 24 Dec 2021
Cited by 7 | Viewed by 2233
Abstract
The paper aimed at studying the slow pyrolysis of vine pruning waste in a fixed bed reactor and characterizing the pyrolysis products. Pyrolysis experiments were conducted for 60 min, using CO2 as a carrier gas and oxidizing agent. The distribution of biochar [...] Read more.
The paper aimed at studying the slow pyrolysis of vine pruning waste in a fixed bed reactor and characterizing the pyrolysis products. Pyrolysis experiments were conducted for 60 min, using CO2 as a carrier gas and oxidizing agent. The distribution of biochar and bio-oil was dependent on variations in heat flux (4244–5777 W/m2), CO2 superficial velocity (0.004–0.008 m/s), and mean size of vegetal material (0.007–0.011 m). Relationships among these factors and process performances in terms of yields of biochar (0.286–0.328) and bio-oil (0.260–0.350), expressed as ratio between the final mass of pyrolysis product and initial mass of vegetal material, and final value of fixed bed temperature (401.1–486.5 °C) were established using a 23 factorial design. Proximate and ultimate analyses, FT-IR and SEM analyses, measurements of bulk density (0.112 ± 0.001 g/cm3), electrical conductivity (0.55 ± 0.03 dS/m), pH (10.35 ± 0.06), and water holding capacity (58.99 ± 14.51%) were performed for biochar. Water content (33.2 ± 1.27%), density (1.027 ± 0.014 g/cm3), pH (3.34 ± 0.02), refractive index (1.3553 ± 0.0027), and iodine value (87.98 ± 4.38 g I2/100 g bio-oil) were measured for bio-oil. Moreover, chemical composition of bio-oil was evaluated using GC-MS analysis, with 27 organic compounds being identified. Full article
(This article belongs to the Special Issue State of the Art of Bio-Oil Production and Processing)
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9 pages, 6101 KiB  
Article
Thermal Treatment under Vacuum for Obtaining a Quenchant from Rapeseed Oil
by Ana Maria Sivriu, Olga Valerica Sapunaru, Ancaelena Eliza Sterpu, Doinita-Roxana Cioroiu Tirpan, Timur Vasile Chis and Tanase Dobre
Processes 2021, 9(12), 2189; https://doi.org/10.3390/pr9122189 - 04 Dec 2021
Cited by 1 | Viewed by 1943
Abstract
The aim of this study was to improve the quality of a vegetable oil, having in view its use as a quenchant for metallic parts in aircrafts. A process of pyrolysis under vacuum was applied to obtain a bio-oil with reduced viscosity and [...] Read more.
The aim of this study was to improve the quality of a vegetable oil, having in view its use as a quenchant for metallic parts in aircrafts. A process of pyrolysis under vacuum was applied to obtain a bio-oil with reduced viscosity and good quenching properties. Preliminarily, the rapeseed oil was fast pyrolyzed at temperature in the range of 300–375 °C and absolute pressure of 1 μbar. Some results such as viscosity and yields of bio-oil were obtained with a narrowing of the temperature range between 300–320 °C, for further processing. Quenching tests with bio-oils on stainless steel 25CD4 showed cooling curves closer to those of the standard mineral oil (Castrol IloquenchTM 1), by comparing them with unprocessed vegetable oil. The hardness of the steel after treatment rose from 29–30 HRC to 43–45 HRC, in accordance with requirements (35–45 HRC). Therefore, the conclusion is that bio-oils obtained by pyrolysis under vacuum are good quenchant proceeds from this study. Full article
(This article belongs to the Special Issue State of the Art of Bio-Oil Production and Processing)
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