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Nanomaterials
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Applications of Nanocatalysts in Biomass Conversion: Volume II
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Applications of Nanocatalysts in Biomass Conversion: Volume II

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Energy and Catalysis".

Deadline for manuscript submissions: closed (20 September 2023) | Viewed by 4817

Special Issue Editor

Prof. Dr. Juan Carlos Serrano-Ruiz

E-Mail Website
Guest Editor
Department of Engineering, University Loyola Andalucía, 41014 Seville, Spain
Interests: biomass conversion; CO2 valorization; catalysis; energy storage; hydrogen technologies
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The world energy demand has increased continuously over the past decade, which directly affects the increase in fossil fuel consumption, resulting in a rise in greenhouse gas emissions. Considering the pollution problems associated with fossil fuels, biomass resources emerge as a promising alternative energy source and as a mean to produce high-value chemicals, which are currently being obtained by nonrenewable sources. However, the complex heterogeneity of biomass places new demands on the design and optimization of catalysts. In this context, the role of nanocatalysts becomes crucial when considering process activity, product quality and optimal operating conditions. Thus, exploring novel nanocatalysts could provide new and efficient methods for the production of renewable biofuels under environmentally friendly conditions.

In this Special Issue, recent results in the production of advanced biofuels using stable, highly active, inexpensive, and reusable nanocatalysts are presented. Papers providing physicochemical properties of nanocatalysts and insights into structure–activity relationships are very welcome.

Prof. Dr. Juan Carlos Serrano-Ruiz
Guest Editor

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. Nanomaterials 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 2900 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

  • biomass
  • biofuel
  • bioenergy
  • nanocatalyst
  • sustainability
  • green energy

Published Papers (3 papers)

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Review

21 pages, 2597 KiB  
Review
A Conceptual Approach for the Design of New Catalysts for Ammonia Synthesis: A Metal—Support Interactions Review
by Javier Arroyo-Caire, Manuel Antonio Diaz-Perez, Mayra Anabel Lara-Angulo and Juan Carlos Serrano-Ruiz
Nanomaterials 2023, 13(22), 2914; https://doi.org/10.3390/nano13222914 - 08 Nov 2023
Viewed by 1562
Abstract
The growing interest in green ammonia production has spurred the development of new catalysts with the potential to carry out the Haber–Bosch process under mild pressure and temperature conditions. While there is a wide experimental background on new catalysts involving transition metals, supports [...] Read more.
The growing interest in green ammonia production has spurred the development of new catalysts with the potential to carry out the Haber–Bosch process under mild pressure and temperature conditions. While there is a wide experimental background on new catalysts involving transition metals, supports and additives, the fundamentals behind ammonia synthesis performance on these catalysts remained partially unsolved. Here, we review the most important works developed to date and analyze the traditional catalysts for ammonia synthesis, as well as the influence of the electron transfer properties of the so-called 3rd-generation catalysts. Finally, the importance of metal–support interactions is highlighted as an effective pathway for the design of new materials with potential to carry out ammonia synthesis at low temperatures and pressures. Full article
(This article belongs to the Special Issue Applications of Nanocatalysts in Biomass Conversion: Volume II)
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Graphical abstract

25 pages, 3614 KiB  
Review
Design of Bifunctional Nanocatalysts Based on Zeolites for Biomass Processing
by Valentina G. Matveeva and Lyudmila M. Bronstein
Nanomaterials 2023, 13(16), 2274; https://doi.org/10.3390/nano13162274 - 08 Aug 2023
Viewed by 1216
Abstract
Bifunctional catalysts consisting of metal-containing nanoparticles (NPs) and zeolite supports have received considerable attention due to their excellent catalytic properties in numerous reactions, including direct (biomass is a substrate) and indirect (platform chemical is a substrate) biomass processing. In this short review, we [...] Read more.
Bifunctional catalysts consisting of metal-containing nanoparticles (NPs) and zeolite supports have received considerable attention due to their excellent catalytic properties in numerous reactions, including direct (biomass is a substrate) and indirect (platform chemical is a substrate) biomass processing. In this short review, we discuss major approaches to the preparation of NPs in zeolites, concentrating on methods that allow for the best interplay (synergy) between metal and acid sites, which is normally achieved for small NPs well-distributed through zeolite. We focus on the modification of zeolites to provide structural integrity and controlled acidity, which can be accomplished by the incorporation of certain metal ions or elements. The other modification avenue is the adjustment of zeolite morphology, including the creation of numerous defects for the NP entrapment and designed hierarchical porosity for improved mass transfer. In this review, we also provide examples of synergy between metal and acid sites and emphasize that without density functional theory calculations, many assumptions about the interactions between active sites remain unvalidated. Finally, we describe the most interesting examples of direct and indirect biomass (waste) processing for the last five years. Full article
(This article belongs to the Special Issue Applications of Nanocatalysts in Biomass Conversion: Volume II)
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Graphical abstract

24 pages, 4217 KiB  
Review
Recent Advances of Triglyceride Catalytic Pyrolysis via Heterogenous Dolomite Catalyst for Upgrading Biofuel Quality: A Review
by Mohd Faiz Muaz Ahmad Zamri, Abd Halim Shamsuddin, Salmiaton Ali, Raihana Bahru, Jassinnee Milano, Sieh Kiong Tiong, Islam Md Rizwanul Fattah and Raja Mohd Hafriz Raja Shahruzzaman
Nanomaterials 2023, 13(13), 1947; https://doi.org/10.3390/nano13131947 - 27 Jun 2023
Cited by 1 | Viewed by 1741
Abstract
This review provides the recent advances in triglyceride catalytic pyrolysis using heterogeneous dolomite catalysts for upgrading biofuel quality. The production of high-quality renewable biofuels through catalytic cracking pyrolysis has gained significant attention due to their high hydrocarbon and volatile matter content. Unlike conventional [...] Read more.
This review provides the recent advances in triglyceride catalytic pyrolysis using heterogeneous dolomite catalysts for upgrading biofuel quality. The production of high-quality renewable biofuels through catalytic cracking pyrolysis has gained significant attention due to their high hydrocarbon and volatile matter content. Unlike conventional applications that require high operational costs, long process times, hazardous material pollution, and enormous energy demand, catalytic cracking pyrolysis has overcome these challenges. The use of CaO, MgO, and activated dolomite catalysts has greatly improved the yield and quality of biofuel, reducing the acid value of bio-oil. Modifications of the activated dolomite surface through bifunctional acid–base properties also positively influenced bio-oil production and quality. Dolomite catalysts have been found to be effective in catalyzing the pyrolysis of triglycerides, which are a major component of vegetable oils and animal fats, to produce biofuels. Recent advances in the field include the use of modified dolomite catalysts to improve the activity and selectivity of the catalytic pyrolysis process. Moreover, there is also research enhancement of the synthesis and modification of dolomite catalysts in improving the performance of biofuel yield conversion. Interestingly, this synergy contribution has significantly improved the physicochemical properties of the catalysts such as the structure, surface area, porosity, stability, and bifunctional acid–base properties, which contribute to the catalytic reaction’s performance. Full article
(This article belongs to the Special Issue Applications of Nanocatalysts in Biomass Conversion: Volume II)
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