sustainability-logo

Journal Browser

Journal Browser

Utilization of Biomass: Energy, Catalysts, and Applications

A special issue of Sustainability (ISSN 2071-1050). This special issue belongs to the section "Sustainable Chemical Engineering and Technology".

Deadline for manuscript submissions: 30 December 2025 | Viewed by 483

Special Issue Editors


E-Mail Website
Guest Editor
Chemical Engineering Department, Federal University of Rio Grande do Norte, Natal, Brazil
Interests: biomass; chemical engineering; fermentation; second-generation ethanol
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Chemical Engineering Department, Federal University of Rio Grande do Norte, Natal, Brazil
Interests: lignin valorization; 2G ethanol; thermochemical conversion; mathematical modeling; process intensification

E-Mail Website
Guest Editor
Chemical Engineering Department, Federal University of Rio Grande do Norte, Natal, Brazil
Interests: Biocatalysis; enzyme immobilization; bioprocess
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The current global scenario, with the focus on reducing the demand for fossil fuels as well as the need to reduce carbon emissions, especially those resulting from combustion fuels, has led researchers and the scientific community to search for alternative sources of energy. In this context, the use of renewable energy plays a key role, since it does not have an environmental impact, mainly when compared to traditional non-renewable ones. Thus, biomass is the most common form of renewable energy—being a source of primary energy supply—and can be converted into other usable forms of energy, such as biofuels. In order to exploit the full potential of biomass in the context of a biorefinery, one can use biocatalysts. Indeed, many of them have been used mainly in the thermochemical approach. Also, biocatalysts can be used in the pretreatment or the hydrolysis step in the lignocellulosic ethanol process, or even during biodiesel production. Therefore, considering all these possibilities, this Special Issue of Sustainability will cover the use of biomass in the context of energy, biocatalysts, and applications. The Editor invites you to submit manuscripts covering all these topics since all are welcome. The main aim is to contribute to the state of the art and to highlight the importance of biomass use as a means of achieving a more sustainable world.

Prof. Dr. Everaldo Silvino dos Santos
Prof. Dr. Carlos Eduardo De Araújo Padilha
Prof. Dr. Nathália Saraiva Rios
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. Sustainability 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 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

  • biocatalysis applied to biofuels
  • biomass pretreatment
  • biorefinery
  • lignocellulosic ethanol
  • thermochemical processes

Benefits of Publishing in a Special Issue

  • Ease of navigation: Grouping papers by topic helps scholars navigate broad scope journals more efficiently.
  • Greater discoverability: Special Issues support the reach and impact of scientific research. Articles in Special Issues are more discoverable and cited more frequently.
  • Expansion of research network: Special Issues facilitate connections among authors, fostering scientific collaborations.
  • External promotion: Articles in Special Issues are often promoted through the journal's social media, increasing their visibility.
  • Reprint: MDPI Books provides the opportunity to republish successful Special Issues in book format, both online and in print.

Further information on MDPI's Special Issue policies can be found here.

Published Papers (1 paper)

Order results
Result details
Select all
Export citation of selected articles as:

Research

20 pages, 2557 KiB  
Article
Improving Reusability of Biocatalysts by Exploiting Cross-Linked Enzyme Aggregates (CLEAs) with Commercial Cellulolytic Cocktails for Hydrolysis of Green Coconut Waste
by Jéssica R. F. Morais, Isabela O. Costa, Carlos E. A. Padilha, Nathália S. Rios and Everaldo S. dos Santos
Sustainability 2025, 17(9), 4221; https://doi.org/10.3390/su17094221 - 7 May 2025
Viewed by 162
Abstract
Efficient hydrolysis of cellulose in agricultural waste (e.g., coconut fiber) is critical for biorefining processes such as second-generation bioethanol (2G ethanol) production. However, free cellulases suffer from low thermal stability and challenges in recovery. To address this, we developed cross-linked enzyme aggregates (CLEAs) [...] Read more.
Efficient hydrolysis of cellulose in agricultural waste (e.g., coconut fiber) is critical for biorefining processes such as second-generation bioethanol (2G ethanol) production. However, free cellulases suffer from low thermal stability and challenges in recovery. To address this, we developed cross-linked enzyme aggregates (CLEAs) combined with magnetic nanoparticles (magnetic CLEAs, m-CLEAs) to enhance enzyme stability and reusability. In this context, solutions of ethanol, acetone, and ammonium sulfate were used to prepare enzymatic aggregates, with subsequent use of glutaraldehyde and magnetic nanoparticles to obtain the biocatalysts. The addition of bovine serum albumin (BSA) protein was also tested to improve immobilization. Biocatalysts with ethanol and acetone performed better. Acetone (AC) and BSA yielded the highest enzymatic activities (287.27 ± 42.59 U/g for carboxymethyl cellulase (CMCase) with Celluclast; 425.37 ± 48.11 U/g for CMCase with Cellic CTec2). Magnetic nanoparticles were incorporated to expand the industrial applicability, producing m-CLEAs with excellent thermal stability and high catalytic activities. The m-CLEA–Celluclast–AC–BSA–GA 5% maintained 58% of its activity after 72 h at 70 °C. The m-CLEA–Celluclast-AC–BSA–GA 2.5% proved effective in hydrolyzing coconut fiber and isolated cellulose, producing up to 0.91 ± 0.01 g/L of glucose and 2.7 ± 0.15 g/L of glucose, respectively, after 72 h. Therefore, this approach supports sustainability by using coconut fiber, which is often discarded into the environment. Full article
(This article belongs to the Special Issue Utilization of Biomass: Energy, Catalysts, and Applications)
Show Figures

Figure 1

Back to TopTop