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Catalysts
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Novel Materials for Heterogeneous Catalysis and Energy Conversion
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Novel Materials for Heterogeneous Catalysis and Energy Conversion

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Catalytic Materials".

Deadline for manuscript submissions: closed (30 June 2024) | Viewed by 3677

Special Issue Editors

Dr. Giuseppe Bonura

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Guest Editor
Institute for Advanced Energy Technologies "Nicola Giordano" ITAE, Italian National Research Council (CNR), 98126 Messina, Italy
Interests: heterogeneous catalysis; CO2 hydrogenation; methanol/DME synthesis; temperature-programmed characterization; oxyfuels
Special Issues, Collections and Topics in MDPI journals
Dr. Catia Cannilla

E-Mail Website
Guest Editor
Institute for Advanced Energy Technologies "Nicola Giordano" ITAE, Italian National Research Council (CNR), 98126 Messina, Italy
Interests: heterogenous catalysis (synthesis, chemico-physical characterization, structure–activity relationship); biofuels; additives for biofuels; green chemistry; reaction kinetics and mechanisms; CO2 conversion
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The overall aim of this Special Issue is to promote novel materials for gas-to-liquid or biomass-to-liquid processes, encompassing the need to move towards an energy economy with greatly reduced net carbon emissions. In this context, sustainable technological approaches require the development of efficient solid catalysts or their optimization in order to deliver the constant and reliable management of energy for the production of large-volume chemicals, biofuels or building materials; this is performed so that these materials are able to quickly reach the market after follow-up, scale-up and validation activities. The Special Issue encourages original contributions and review articles on the most current and challenging areas of interest regarding energy, focusing on the conversion of fossil and renewable resources mediated by innovative catalytic materials, and in view of the ambitious decarbonization targets that are to be implemented worldwide in the coming decades.

Dr. Giuseppe Bonura
Dr. Catia Cannilla
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. Catalysts 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 2200 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

  • hybrid catalysts
  • CCUS
  • fuel production
  • energy materials
  • heterogeneous processes
  • power-to-gas processes

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Published Papers (3 papers)

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Research

21 pages, 5506 KiB  
Article
Innovative In/H-SSZ-39 Catalysts: An Exploration in NOx Reduction via CH4-SCR
by Jiuhu Zhao, Jingjing Jiang, Meng Wang, Jianxiong Chen, Jin Li, Xianbin Wang and Rongshu Zhu
Catalysts 2024, 14(9), 582; https://doi.org/10.3390/catal14090582 - 1 Sep 2024
Viewed by 823
Abstract
Nitrogen oxides (NOx), pivotal atmospheric pollutants, significantly threaten the environment and human health. The CH4-SCR process, leveraging the abundance and accessibility have methane, emerges as a promising avenue for NOx abatement. Previous studies have demonstrated that zeolite support [...] Read more.
Nitrogen oxides (NOx), pivotal atmospheric pollutants, significantly threaten the environment and human health. The CH4-SCR process, leveraging the abundance and accessibility have methane, emerges as a promising avenue for NOx abatement. Previous studies have demonstrated that zeolite support with twelve-membered ring (12-MR) and five-membered ring (5-MR) structures are susceptible to framework collapse in the presence of H2O, leading to catalyst deactivation. Consequently, there is a necessity to explore novel zeolites with enhanced hydrothermal stability for application in CH4-SCR processes. This research introduced for the first time an investigation into a novel In/H-SSZ-39 catalyst, which was synthesized via ion exchange and meticulously optimized for preparation conditions, including calcination temperature and In ions concentration, and reaction conditions, including CH4/NO ratio, O2 concentration, H2O content, and Gas Hourly Space Velocity (GHSV). Furthermore, long-term operation tests and stability tests were conducted on the In/H-SSZ-39 catalyst. In addition, a series of characterizations were conducted to delve into the reasons behind how preparation conditions influence catalytic activity, as well as to investigate the changes in physicochemical properties during the reaction process. Full article
(This article belongs to the Special Issue Novel Materials for Heterogeneous Catalysis and Energy Conversion)
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14 pages, 6272 KiB  
Article
Biodiesel Synthesis from Coconut Oil Using the Ash of Citrus limetta Peels as a Renewable Heterogeneous Catalyst
by Priyal Kaushik, Gurmeet Kaur and Imran Hasan
Catalysts 2024, 14(8), 549; https://doi.org/10.3390/catal14080549 - 22 Aug 2024
Viewed by 962
Abstract
The synthesis of biodiesel can be achieved using either homogeneous or heterogeneous catalysts. Given the non-renewable nature of homogeneous catalysts, heterogeneous catalysts are increasingly preferred for biodiesel production. Agricultural wastes serve as a viable source for these heterogeneous catalysts, contributing to environmental sustainability. [...] Read more.
The synthesis of biodiesel can be achieved using either homogeneous or heterogeneous catalysts. Given the non-renewable nature of homogeneous catalysts, heterogeneous catalysts are increasingly preferred for biodiesel production. Agricultural wastes serve as a viable source for these heterogeneous catalysts, contributing to environmental sustainability. This study introduces a novel, eco-friendly, cost-effective, and efficient heterogeneous catalyst that was developed and derived from Citrus limetta peels for biodiesel production. The catalyst was thoroughly characterized using Fourier-transform infrared spectroscopy (FTIR), X-ray diffractograms (XRD), Field Emission Scanning electron microscopy (FESEM), and energy-dispersive X-ray (EDX). Coconut oil, a rich and renewable resource, was used as the feedstock for the biodiesel synthesis. The conversion process was confirmed by 1H NMR, IR spectra, mass spectra, and 13C NMR of the biodiesel. The developed method using the Citrus limetta peel-derived catalyst demonstrated a 100% yield. The results show the optimum conditions for biodiesel synthesis are 1 w/v (for the catalytical dose), with a 6:1 methanol/oil ratio at 60 °C for 3 h. The synthesized biodiesel exhibited a high cetane value of 54, contributing to improved ignition and reduced engine noise. Its sulfur-free composition, boiling point of 294 °C, high viscosity of 2.5 mm2/s, acid value of 0.09 mgKOH/g, and flash point of 142 °C enhance its environmental profile. The catalyst can be used for up to five cycles, underscoring its potential as a cost-effective and sustainable approach for biodiesel production. Full article
(This article belongs to the Special Issue Novel Materials for Heterogeneous Catalysis and Energy Conversion)
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12 pages, 1779 KiB  
Article
Unravelling the Influence of Binder Typology during the Additive Manufacturing of Hybrid Multi-Channel Cylinders for Catalytic Purposes
by Serena Todaro, Giuseppe Bonura, Alessandro Cajumi, Mariarita Santoro, Fabrizio Randazzo, Giosuè Giacoppo, Francesco Frusteri and Catia Cannilla
Catalysts 2024, 14(2), 101; https://doi.org/10.3390/catal14020101 - 25 Jan 2024
Viewed by 1339
Abstract
In this work, a 3D printing methodology based on the robocasting of catalytic ink pastes was applied to obtain structured matrix-like cylinders as innovative materials for an effective utilization of carbon dioxide. The influence of three different binders (i.e., PEI, HPMC and MC) [...] Read more.
In this work, a 3D printing methodology based on the robocasting of catalytic ink pastes was applied to obtain structured matrix-like cylinders as innovative materials for an effective utilization of carbon dioxide. The influence of three different binders (i.e., PEI, HPMC and MC) on the physio-chemical, mechanical and catalytic properties of multi-channel monoliths was studied against a reference binder-free powdered system in order to envisage the effectiveness of the printing procedure in realizing hybrid advanced materials at a higher control and reproducibility than from traditional preparation techniques. In terms of textural and structural properties, the micro-extruded 3D cylinders only evidenced a slight difference in terms of relative crystallinity, with minor effects on the surface area exposure in relation to the specific binder used during the direct ink writing process. More importantly, the typology of binder significantly affected the rheological properties of the catalytic ink, with the need of a controlled viscosity to ensure a suitable thixotropic behaviour of the extrudable pastes, finally determining an optimal mechanical resistance of the final 3D monolith. The experimental validation of the hybrid multi-channel cylinders under conditions of CO2 hydrogenation demonstrated the great potential of additive manufacturing in the realization of catalyst architectures characterized by unique features and fidelity scarcely reproducible via conventional synthetic techniques. Full article
(This article belongs to the Special Issue Novel Materials for Heterogeneous Catalysis and Energy Conversion)
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