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Processes
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Advanced Biodiesel Production Processes
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Advanced Biodiesel Production Processes

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

Deadline for manuscript submissions: closed (5 June 2022) | Viewed by 5132

Special Issue Editors

Prof. Dr. María Dolores Redel-Macías

E-Mail Website
Guest Editor
Department Rural Engineering, Ed Leonardo da Vinci, Campus de Rabanales, University of Cordoba, Campus de Excelencia Internacional Agroalimentario, ceiA3, 14071 Cordoba, Spain
Interests: renewable energy; biofuels; sound quality; scientific disclosure; women in engineering
Dr. Meisam Babaie

E-Mail Website
Guest Editor
School of Science, Engineering and Environment, University of Salford, Manchester M54WT, UK
Interests: renewable/alternative energy; energy system analysis; modelling and optimization; air quality and emission control; modern automotive engineering

Special Issue Information

Dear Colleagues, 

Biofuel is one of the main renewable fuels capable of substituting fossil fuel in power generation and transportation. Although electric vehicles will be the one of the options for the substitution of internal combustion engines, until this substitution is complete, biofuel is an excellent alternative. It is particularly relevant in the mid-term for road transport and in the long-term for rail, marine, and aviation transport as well as electricity generation. Biofuel is a renewable and sustainable energy source made from raw materials and wastes, among other resources. Advanced technologies and processes are employed to produce biofuels, such as transesterification, esterification, pyrolysis, etc. Thus, due to the merits of biodiesel for environmental sustainability, bioenergy technologies and processes play a crucial role in renewable energy development. This Special Issue aims to publish a comprehensive overview and in-depth technical research papers addressing recent progress in biofuel processes and applications. Studies of advanced techniques and methods for biofuel production and biofuel applications are also welcomed. Research involving experimental and numerical studies, review papers, recent developments, and the current state-of-the-art and emerging technologies in this field are highly encouraged.

Prof. Dr. María Dolores Redel-Macías
Dr. Meisam Babaie
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

  • biofuel production technologies
  • biofuel processing
  • biofuel process design and optimization
  • biofuel resources
  • emissions and environmental impact
  • bioenergy
  • biofuel applications

Published Papers (2 papers)

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Research

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11 pages, 5295 KiB  
Article
A Hybrid Genetic Programming–Gray Wolf Optimizer Approach for Process Optimization of Biodiesel Production
by Vikas Kumar, Kanak Kalita, S Madhu, Uvaraja Ragavendran and Xiao-Zhi Gao
Processes 2021, 9(3), 442; https://doi.org/10.3390/pr9030442 - 01 Mar 2021
Cited by 12 | Viewed by 1846
Abstract
Biodiesel is one the most sought after alternate fuels in the current global need for sustainable and renewable energy sources due to their lower emissions and no major modification requirement to existing engines. However, the performance and productivity of the biodiesel production process [...] Read more.
Biodiesel is one the most sought after alternate fuels in the current global need for sustainable and renewable energy sources due to their lower emissions and no major modification requirement to existing engines. However, the performance and productivity of the biodiesel production process are significantly dependent on the process parameters. In this regard, a novel hybrid genetic programming-gray wolf optimizer approach for the process optimization of biodiesel production is proposed in this paper. For an illustration of the proposed approach, kinematic viscosity is expressed as a symbolic regression metamodel to account for the influence of catalyst concentration, reaction temperature, alcohol-to-oil molar ratio, and reaction time. Then, the genetic programming-based symbolic regression metamodel is used as an objective function by the gray wolf optimizer to optimize the process parameters. The obtained results show that the proposed approach is simple, accurate, and robust. Full article
(This article belongs to the Special Issue Advanced Biodiesel Production Processes)
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Review

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15 pages, 303 KiB  
Review
Noncatalytic Biodiesel Synthesis under Supercritical Conditions
by Violeta Makareviciene and Egle Sendzikiene
Processes 2021, 9(1), 138; https://doi.org/10.3390/pr9010138 - 12 Jan 2021
Cited by 13 | Viewed by 2102
Abstract
The constant increase in greenhouse gases in the environment is forcing people to look for different ways to reduce such pollution. One of these ways is the use of biodiesel for road transport. Conventional biodiesel production involves the catalytic triglyceride transesterification process. When [...] Read more.
The constant increase in greenhouse gases in the environment is forcing people to look for different ways to reduce such pollution. One of these ways is the use of biodiesel for road transport. Conventional biodiesel production involves the catalytic triglyceride transesterification process. When using homogeneous two-stage catalysis, it is difficult to purify the resulting product from the by-products formed, and the catalysts cannot be reused. In the case of heterogeneous catalysis, the process costs are increased due to separation and regeneration of the catalysts. To solve these problems of catalytic synthesis, a noncatalytic process has been recently studied that which takes place under supercritical conditions for an alcohol or other acyl receptor. In such biodiesel production, fatty feedstocks and alcohols are used as raw materials, with the synthesis taking place at supercritical conditions for alcohol, i.e., high temperature and pressure, thus making the process quite simple. This paper reviews the results obtained from biodiesel synthesis using a noncatalytic supercritical process for transesterification using both alcohols and carboxylate esters of low molecular weight, evaluating the optimal conditions for these processes and biofuel stability at high temperatures. Full article
(This article belongs to the Special Issue Advanced Biodiesel Production Processes)
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