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Catalysts
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Catalysts Based on Mesoporous Materials for Environmental Application
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Catalysts Based on Mesoporous Materials for Environmental Application

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

Deadline for manuscript submissions: closed (20 November 2021) | Viewed by 10236

Special Issue Editors

Prof. Dr. Silvia Todorova

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Guest Editor
Institute of Catalysis, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
Interests: heterogeneous catalysis; complete oxidation of volatile organic compounds; in situ infrared spectroscopy; characterization of new catalysts by different methods (FTIR, TPR, solid-state NMR, XRD, XPS, and adsorption); catalysis of supported metal on porous materials
Special Issues, Collections and Topics in MDPI journals
Dr. Bénédicte Lebeau

E-Mail Website
Guest Editor
Equipe Matéraiux à Porosité Contrôlée, Institut de Science des Matériaux de Mulhouse, CNRS LRC 7228, Université de Haute Alsace, 68093 Mulhouse, France
Interests: mesoporous oxides; materials with hierarchized porosity; sol-gel synthesis; mechanisms of formation; organic and inorganic functionalization; shaping, encapsulation/vectorization; adsorption; catalysis; thermal insulation
Special Issues, Collections and Topics in MDPI journals
Dr. Jean-Luc Blin

E-Mail Website
Guest Editor
Faculty of Sciences and Technology, University of Lorraine, 54000 Nancy, France
Interests: organized molecular systems; surfactants; mesostructured materials; hierarchical (macro–meso, meso–meso) porous materials; catalyst supports (silica, titania, zirconia, alumina)

Special Issue Information

Dear Colleagues,

Since the discovery of ordered mesoporous silica materials in the 1990s, the synthesis and applications of mesoporous solids have been studied extensively. These materials have attracted much attention because of their large surface area, uniform pore-size distribution, large pore size, and wide range of potential applications in the fields of separation, adsorption, and catalysis.Hierarchically porous catalysts have recently attracted scientific and technological interest due to their improved diffusion performance and high surface area. The hierarchically porous materials combine the chemical and physical characteristics of different porous materials and show great potential in both fundamental research and practical application. Bimodal mesoporous and macroporous silica has multiple benefits arising from the different pore-size regimes. The processes of molecular diffusion and mass transfer are greatly improved by the novel structure. In this Special Issue of Catalysts, we invite authors to submit original research papers focused on the synthesis, characterization, and modification of mesoporous and macro-mesoporous materials with transition and noble metals, and their application in processes for the removal of different pollutants from water and waste gases.

Dr. Silvia Todorova
Dr. Bénédicte Lebeau
Dr. Jean-Luc Blin
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 2700 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

  • Synthesis of mesoporous and macro/mesoporous materials
  • Modification of mesoporous and macro/mesoporous materials
  • Heterogeneous catalysis
  • Catalyst preparation
  • Acid–base catalysis
  • Redox catalysis
  • VOC combustion
  • Environmental catalysis
  • Water and wastewater treatment

Published Papers (4 papers)

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Research

13 pages, 2415 KiB  
Article
A Study on the Effect of Different Ball Milling Methods on the NH3-SCR Activity of Aluminum-Laden Bayan Obo Tailings
by Xinrui Bai, Jiawei Lin, Zedong Chen, Limin Hou and Wenfei Wu
Catalysts 2021, 11(5), 568; https://doi.org/10.3390/catal11050568 - 29 Apr 2021
Cited by 4 | Viewed by 1859
Abstract
Rich in Fe, Ce, Mn, Si and other elements which have good catalytic activity, Bayan Obo rare-earth tailings are naturally advantaged as the carrier of denitrification catalysts. In this paper, pseudo boehmite (γ-Al2O3) was mixed with Bayan Obo tailings [...] Read more.
Rich in Fe, Ce, Mn, Si and other elements which have good catalytic activity, Bayan Obo rare-earth tailings are naturally advantaged as the carrier of denitrification catalysts. In this paper, pseudo boehmite (γ-Al2O3) was mixed with Bayan Obo tailings using different ball milling methods for modification to prepare NH3-SCR catalysts. The effect of different mixing methods on the SCR denitrification activity at a low temperature was investigated and the prepared catalysts were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), temperature programed desorption (NH3-TPD), temperature programed reduction (H2-TPR) and other means. The conversion rate of NOx at 250–350 °C was above 80% and the highest conversion rate of NOx of 90% was achieved at 300 °C. SEM and XRD revealed that the tailings modified by pseudo boehmite (γ-Al2O3) using the ordinary ball milling method have loose structure and good dispersion of active substances, and specific surface area (BET) analysis shows that the tailings have the maximum specific surface area and pore volume. However, over grinding and secondary spheronization were observed in the tailings modified by pseudo boehmite (γ-Al2O3) using high energy ball milling method, leading to the decrease of specific surface area and pore volume, poor dispersion of active substances, and ultimately low denitrification rate. Full article
(This article belongs to the Special Issue Catalysts Based on Mesoporous Materials for Environmental Application)
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19 pages, 3799 KiB  
Article
Combined Iron-Loaded Zeolites and Ozone-Based Process for the Purification of Drinking Water in a Novel Hybrid Reactor: Removal of Faecal Coliforms and Arsenic
by Amir Ikhlaq, Rida Fatima, Umair Yaqub Qazi, Rahat Javaid, Asia Akram, Sami Ibn Shamsah and Fei Qi
Catalysts 2021, 11(3), 373; https://doi.org/10.3390/catal11030373 - 12 Mar 2021
Cited by 14 | Viewed by 2857
Abstract
This study was carried out to provide a novel solution to treat drinking water at household levels, specifically removing arsenic (As) and faecal coliforms (microbes). In the current investigation, a synergistic iron-loaded zeolites and ozonation process (O3/Fe-ZA) was used for the [...] Read more.
This study was carried out to provide a novel solution to treat drinking water at household levels, specifically removing arsenic (As) and faecal coliforms (microbes). In the current investigation, a synergistic iron-loaded zeolites and ozonation process (O3/Fe-ZA) was used for the first time in a modified batch reactor to remove coliform bacteria and arsenic in tap water. Moreover, the study utilizes the human health risk assessment model to confirm the health risk due to As intake in drinking water. The risk assessment study revealed a health risk threat among the residents suffering from the adverse effects of As through its intake in drinking water. Furthermore, the results also suggested that the O3/Fe-ZA process significantly removes faecal coliforms and As, when compared with single ozonation processes. Additionally, the ozone dose 0.2 mg/min and Fe-ZA dose of 10 g (in the O3/Fe-ZA process) gives the maximum removal efficiency of 100% within 15 min for faecal coliform removal. In 30 min, the removal efficiency of 88.4% was achieved at the ozone dose of 0.5 mg/min and 93% removal efficiency was achieved using 10 g Fe-ZA for the removal of As in the O3/Fe-ZA process. Hence, it was concluded that the O3/Fe-ZA process may be regarded as an effective method for removing faecal coliforms and As from drinking water compared to the single ozonation processes. Full article
(This article belongs to the Special Issue Catalysts Based on Mesoporous Materials for Environmental Application)
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14 pages, 2573 KiB  
Article
Co–Ce Oxides Supported on SBA-15 for VOCs Oxidation
by Jean-Luc Blin, Laure Michelin, Bénédicte Lebeau, Anton Naydenov, Ralitsa Velinova, Hristo Kolev, Pierrick Gaudin, Loïc Vidal, Anna Dotzeva, Krasimir Tenchev and Silviya Todorova
Catalysts 2021, 11(3), 366; https://doi.org/10.3390/catal11030366 - 11 Mar 2021
Cited by 5 | Viewed by 2308
Abstract
Reported here are new data on the structural and catalytic properties of a series of mono-component cobalt and bi-component Co–Ce catalysts supported on SBA-15 (Santa Barbara Amorphous-15)). The catalysts performance has been evaluated by tests on combustion of methane, propane, and n-hexane. [...] Read more.
Reported here are new data on the structural and catalytic properties of a series of mono-component cobalt and bi-component Co–Ce catalysts supported on SBA-15 (Santa Barbara Amorphous-15)). The catalysts performance has been evaluated by tests on combustion of methane, propane, and n-hexane. It was established that the preparation of the Co–Ce catalysts by the ‘two-solvent’ technique does not significantly change the mesoporous structure, however, its pores are clogging with the Co and Ce guest species. Cobalt and cerium are uniformly distributed and preferentially fill up the channels of SBA-15, but oxide agglomerates located on the surface are observed as well. The highest activity of the mono-component cobalt sample is explained by its higher reducibility as a result of lower interaction of the cobalt oxide with the SBA-15. The fine dispersion of cobalt and cerium oxide and their strong interaction in the channels of the SBA-15 molecular sieve, leads to the formation of difficult-to-reduce oxide phases and, consequently, to lower catalytic activity compared to monocomponent cobalt oxide catalyst. The synthesised mesoporous structure can prevent the agglomeration of the oxide particles, thus leading to the successful development of a new and stable catalyst for decreasing greenhouse gas emissions. Full article
(This article belongs to the Special Issue Catalysts Based on Mesoporous Materials for Environmental Application)
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10 pages, 2716 KiB  
Article
Effect of Mesostructured Zirconia Support on the Activity and Selectivity of 4,6-Dimethydibenzothiophene Hydrodesulfurization
by Sylvette Brunet, Bénédicte Lebeau, Issam Naboulsi, Laure Michelin, Jean Dominique Comparot, Claire Marichal, Séverinne Rigolet, Magali Bonne and Jean-Luc Blin
Catalysts 2020, 10(10), 1162; https://doi.org/10.3390/catal10101162 - 10 Oct 2020
Cited by 4 | Viewed by 2226
Abstract
In contrast with the conventional CoMoS/alumina catalyst, the use of amorphous mesostructured ZrO2 as support for the dispersion of the CoMoS active phase in deep hydrodesulfurization (HDS) of 4,6-dimethyldibenzothiophene led to a higher promotion rate and a better sulfidation of the cobalt [...] Read more.
In contrast with the conventional CoMoS/alumina catalyst, the use of amorphous mesostructured ZrO2 as support for the dispersion of the CoMoS active phase in deep hydrodesulfurization (HDS) of 4,6-dimethyldibenzothiophene led to a higher promotion rate and a better sulfidation of the cobalt species. The CoMoS, dispersed over mesostructured amorphous ZrO2 as catalyst, also induced a modification of the main desulfurization way; in this case, a shift towards direct desulfurization selectivity was observed. This result was unexpected regarding the literature. Indeed, the hydrogenated route was observed for commercial zirconia. The designed catalysts are therefore more eco-friendly, since they consume less hydrogen. This implies a better use of the fossil resources. Full article
(This article belongs to the Special Issue Catalysts Based on Mesoporous Materials for Environmental Application)
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