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Catalysts for Water and Air Pollution Control: Present and Future,...
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Catalysts for Water and Air Pollution Control: Present and Future, 2nd Edition

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

Deadline for manuscript submissions: closed (15 November 2024) | Viewed by 2426

Special Issue Editors

Dr. Eduardo Miró

E-Mail Website
Guest Editor
Instituto de Investigaciones en Catálisis y Petroquímica, INCAPE (UNL-CONICET), Facultad de Ingeniería Química, Santiago del Estero 2829, Santa Fe 3000, Argentina
Interests: catalytic processes; environmental catalysis; air pollution control
Special Issues, Collections and Topics in MDPI journals
Dr. Ezequiel David Banus

E-Mail Website
Co-Guest Editor
Instituto de Investigaciones en Catálisis y Petroquímica, INCAPE (UNL-CONICET), Facultad de Ingeniería Química, Santiago del Estero 2829, Santa Fe 3000, Argentina
Interests: heterogeneous catalysts; soot combustion; phenol degradation; CO oxidation; 3D printing; structured catalysts
Dr. Juan Pablo Bortolozzi

E-Mail Website
Co-Guest Editor
Instituto de Investigaciones en Catálisis y Petroquímica, INCAPE (UNL-CONICET), Facultad de Ingeniería Química, Santiago del Estero 2829, Santa Fe 3000, Argentina
Interests: heterogeneous catalysis; flexible and rigid structured catalysts; oxidation reactions; oxidative dehydrogenation of hydrocarbons; pollutants abatement; 3D printing

Special Issue Information

Dear Colleagues,

Following the first successful Special Issue on this topic (available here), we are happy to announce a second edition entitled “Catalysts for Water and Air Pollution Control: Present and Future, 2nd Edition”.

For several years now, the use of catalytic processes for reducing environmental pollution has become essential. Due to increasing restrictions on emission limits, it is necessary to increase efforts and research activities in this area; developing more efficient catalytic processes is becoming evident. A typical example is a complex system currently used for the simultaneous reduction of CO, VOCs, NOx and soot particles in diesel engine exhausts, for which a tandem of several catalytic reactors has been developed. Other examples are Advanced Oxidation Processes (AOP) which remove organic contaminants from water and wastewater using different oxidants such as H2O2 or O3. This issue of catalysts has been dedicated to disseminating results from the efforts of research groups on both the basic and applied aspects of environmental catalysis, which is focused on water and air pollution control, aiming to generate new ideas and stimulate research in this fascinating area. Manuscripts are welcome from a broad spectrum of important topics relating to catalysts, reactors and processes.

Dr. Eduardo Miró
Dr. Ezequiel David Banus
Dr. Juan Pablo Bortolozzi
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

  • environmental catalysis
  • air pollution
  • CO, VOCs, NOx added soot particles
  • catalytic processes
  • water pollution
  • photocatalysis
  • Emerging Organic Contaminants (EOCs)
  • wastewater treatment
  • heterogeneous catalysts
  • Advanced Oxidation Processes (AOPs)

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Related Special Issue

Published Papers (4 papers)

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Research

15 pages, 1855 KiB  
Article
Mechanistic and Kinetic Analysis of Complete Methane Oxidation on a Practical PtPd/Al2O3 Catalyst
by Min Wang, Hai-Ying Chen, Yuliana Lugo-Jose, Joseph M. Fedeyko, Todd J. Toops and Jacqueline Fidler
Catalysts 2024, 14(12), 847; https://doi.org/10.3390/catal14120847 - 23 Nov 2024
Viewed by 290
Abstract
A PtPd/Al2O3 catalyst developed for the complete oxidation of methane from the ventilation air of underground coal mines is compared against a model PdO/Al2O3 catalyst. Although the PtPd/Al2O3 catalyst is substantially more active and [...] Read more.
A PtPd/Al2O3 catalyst developed for the complete oxidation of methane from the ventilation air of underground coal mines is compared against a model PdO/Al2O3 catalyst. Although the PtPd/Al2O3 catalyst is substantially more active and stable than the model catalyst, the nature of active sites between the two catalysts is deemed to be fundamentally the same based on their response to different feed gas compositions and the evolution of surface CO adsorption complexes during time-resolved CO adsorption DRIFTS experiment. For both catalysts, coordinatively unsaturated Pd sites are considered the active centers for methane activation and the subsequent oxidation reaction. H2O competes with CH4 for the same active sites, resulting in severe inhibition. Additionally, the CH4 oxidation reaction also causes self-inhibition. Taking both inhibition effects into consideration, a relatively simple kinetic model is developed. The model provides a good fit of the 72 sets of kinetic data collected on the PtPd/Al2O3 catalyst under practically relevant reaction conditions with CH4 concentration in the range of 0.05–0.4%, H2O concentration of 1.0–5.0%, and reaction temperatures of 450–700 °C. Kinetic parameters based on the model suggest that the CH4 activation energy on the PtPd/Al2O3 catalyst is 96.7 kJ/mol, and the H2O adsorption energy is −31.0 kJ/mol. Both values are consistent with the parameters reported in the literature. The model can be used to develop catalyst sizing guidelines and be incorporated into the control algorithm of the catalytic system. Full article
(This article belongs to the Special Issue Catalysts for Water and Air Pollution Control: Present and Future, 2nd Edition)
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14 pages, 4643 KiB  
Article
Degradation of Tetracycline (TC) by ZrO2-3DG/PMS System: Revealing the Role of Defects in the Conditions of Light Irradiation and Sulfate Accumulation
by Jixiang Duan, Xin Wang, Zhihong Ye and Fuming Chen
Catalysts 2024, 14(12), 846; https://doi.org/10.3390/catal14120846 - 23 Nov 2024
Viewed by 292
Abstract
The application of advance oxidation processes (AOPs) based on the activation of peroxymonosulfate (PMS) is a great concern for wastewater treatment. Herein, ZrO2-3DG was constructed using a hydrothermal method for the degradation of tetracycline (TC) with PMS. The defective ZrO2 [...] Read more.
The application of advance oxidation processes (AOPs) based on the activation of peroxymonosulfate (PMS) is a great concern for wastewater treatment. Herein, ZrO2-3DG was constructed using a hydrothermal method for the degradation of tetracycline (TC) with PMS. The defective ZrO2-3DG materials were also prepared with plasma treatment. SEM and XPS results show that the ZrO2-3DG composite and the corresponding defective materials were successfully fabricated. The ZrO2 particles are distributed uniformly on the substrate material. Plasma can induce defects on the composite materials and create highly active sites. TC degradation results show that the ZrO2-3DG/PMS system can achieve a degradation efficiency of 92.9% for TC. The influences of defects on materials, light irradiation and sulfate accumulation were investigated. It has been found that defects can induce an inhibiting effect on the degradation process, which can be tuned by plasma time. The defective ZrO2-3DG/PMS system exhibits excellent resistance to the accumulation of sulfate, even showing enhanced degradation performances in specific conditions. The light irradiation has led to a higher degradation efficiency with the accumulation of sulfate compared with a dark environment. These findings give great guidance to the application of the ZrO2-3DG/PMS system for environmental protection. Full article
(This article belongs to the Special Issue Catalysts for Water and Air Pollution Control: Present and Future, 2nd Edition)
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17 pages, 4438 KiB  
Article
Significant Effects of Adding Mode on Low-Temperature De-NOx Performance and SO2 Resistance of a MnCeTiOx Catalyst Prepared by the Co-Precipitation Method
by Xi Yang, Hongyan Xue, Lei Wang, Jun Yu, Lupeng Han and Dongsen Mao
Catalysts 2024, 14(10), 690; https://doi.org/10.3390/catal14100690 - 4 Oct 2024
Viewed by 531
Abstract
Three MnCeTiOx catalysts with the same composition were prepared by conventional co-precipitation (MCT-C), reverse co-precipitation (MCT-R), and parallel co-precipitation (MCT-P), respectively, and their low-temperature SCR performance for de-NOx was evaluated. The textural and structural properties, surface acidity, redox capacity, and reaction [...] Read more.
Three MnCeTiOx catalysts with the same composition were prepared by conventional co-precipitation (MCT-C), reverse co-precipitation (MCT-R), and parallel co-precipitation (MCT-P), respectively, and their low-temperature SCR performance for de-NOx was evaluated. The textural and structural properties, surface acidity, redox capacity, and reaction mechanism of the catalysts were investigated by a series of characterizations including N2 adsorption and desorption, XRD, SEM, XPS, H2-TPR, NH3-TPD, NO-TPD, and in situ DRIFTs. The results revealed that the most excellent catalytic performance was achieved on MCT-R, and more than 90% NOx conversion can be obtained at 100–300 °C under a high GHSV of 80,000 mL/(gcat·H). Furthermore, MCT-R possessed optimal tolerance to H2O and SO2 poisoning. The excellent catalytic performance of MCT-R can be attributed to its larger BET specific surface area; higher contents of Mn4+, Ce3+, and adsorbed oxygen species; and more adsorption capacity for NH3 and NO. Moreover, in situ DRIFTs results indicated that the NH3-SCR reaction follows simultaneously the Langmuir–Hinshelwood and Eley–Rideal mechanisms at 100 °C. By adjusting the adding mode during the co-precipitation process, excellent low-temperature de-NOx activity of MCT-R can be obtained simply and conveniently, which is of great practical value for the preparation of a MnCeTiOx catalyst for denitrification. Full article
(This article belongs to the Special Issue Catalysts for Water and Air Pollution Control: Present and Future, 2nd Edition)
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15 pages, 8013 KiB  
Article
Shining a Light on Sewage Treatment: Building a High-Activity and Long-Lasting Photocatalytic Reactor with the Elegance of a “Kongming Lantern”
by Xiaohan Xu, Yi Wang, Zhuo Deng, Jin Wang, Xile Wei, Peng Wang and Dun Zhang
Catalysts 2024, 14(9), 645; https://doi.org/10.3390/catal14090645 - 21 Sep 2024
Viewed by 551
Abstract
Photocatalysis is a promising technology for efficient sewage treatment, and designing a reactor with a stable loading technique is crucial for achieving long-term stability. However, there is a need to improve the current state of the art in both reactor design and loading [...] Read more.
Photocatalysis is a promising technology for efficient sewage treatment, and designing a reactor with a stable loading technique is crucial for achieving long-term stability. However, there is a need to improve the current state of the art in both reactor design and loading techniques to ensure reliable and efficient performance. In this study, we propose an innovative solution by employing polydimethylsiloxane as a bonding layer on a substrate of 3D-printed polyacrylic resin. By means of mechanical extrusion, the active layer interacts with the bonding layer, ensuring a stable loading of the active layer onto the substrate. Simultaneously, 3D printing technology is utilized to construct a photocatalytic reactor resembling a “Kongming Lantern”, guaranteeing both high activity and durability. The reactor exhibited remarkable performance in degrading organic dyes and eliminating microbes and displayed a satisfactory purification effect on real water samples. Most significantly, it maintained its catalytic activity even after 50 weeks of cyclic degradation. This study contributes to the development of improved photocatalysis technologies for long-term sewage treatment applications. Full article
(This article belongs to the Special Issue Catalysts for Water and Air Pollution Control: Present and Future, 2nd Edition)
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