Submit to Catalysts Review for Catalysts Propose a Special Issue

Journal Menu

Journal Browser

► Journal Browser

Special Issue "Catalysts for Mobile Source: Low-Carbon and Pollution Emission Control"

Print Special Issue Flyer
Special Issue Editors
Special Issue Information
Keywords
Published Papers

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

Deadline for manuscript submissions: closed (30 November 2023) | Viewed by 1315

Share This Special Issue

Special Issue Editors

Dr. Zhenguo Li
E-Mail Website
Guest Editor

National Engineering Laboratory for Mobile Source Emission Control Technology, China Automotive Technology & Research Center, Tianjin 300300, China
Interests: catalysis; collaborative control technology; carbon dioxide; pollution emission; mobile sources

Dr. Xiaodong Wu

E-Mail Website
Guest Editor

School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
Interests: environmental catalysis; noble metal catalysts; rare earth oxides; zeolites; exhaust purification; photocatalysis

Special Issue Information

Dear Colleagues,

The global energy shortage and environmental pollution are becoming increasingly prominent issues, hindering the sustainable development of our planet. Mobile sources are a major source of energy consumption and pollution emissions. After-treatment technology is the most effective way to solve this pollution issue. Well-known traditional after-treatment catalysts include SCR (selective catalytic reduction), cDPF (catalyzed diesel particulate filter), ASC (ammonia slip catalyst), DOC (diesel oxidation catalyst), TWC (three-way catalyst), MOC (methane oxidation catalyst), etc. In addition to these typical thermal catalysts, other advanced catalytic technologies, such as electro-assisted catalysis, have been developed. Moreover, new catalytic materials have been developed for internal combustion engines that burn low- and zero-carbon fuels. With increasingly strict emission standards and the application of green fuels, it is necessary to further optimize and upgrade existing catalysts and design new catalysts to cope with future ultra-low/near-zero emission requirements.

This Special Issue will feature the works presented at The 6th International Symposium on Mobile Source Low Carbon Energy Conservation and Pollutant Emission Control Technology that collect the research results of catalytic materials currently used to solve the problems of carbon dioxide and pollutant emissions from mobile sources, and explores the key research directions in the next stage, being committed to promoting the development of catalysis science in the field. It involves various aspects of catalyst design, preparation, characterization, reaction mechanisms, and deactivation mechanisms, including, but not limited to, catalysts used to address the main pollutants such as HC, CO, NO_x, and PM, catalysts used to address unconventional pollutants such as CH₄, N₂O, NH₃ and NMHC, electrocatalysts and plasma-assisted catalysts, low-temperature adsorption materials, etc.

More information about the symposium can be found at: https://mp.weixin.qq.com/s/1zSOBMKA2U0CAkbjVyosmg

Additionally, scientists are cordially invited to contribute original research papers or reviews in modeling and simulation based on the catalysts, collaborative control technology for mobile source pollution and carbon reduction, and ultra-low emission after-treatment technology to this special issue of Catalysts.

Dr. Zhenguo Li
Dr. Xiaodong Wu
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

CO₂ and pollution emission cooperative control technology
after-treatment technology
ultra-low-emission after-treatment technology
catalyst design
catalyst synthesis and characterization
heterogeneous catalyst
mechanism of catalytic reaction
catalyst deactivation mechanism
thermodynamics and kinetics
modeling and simulation of catalytic reactions

Published Papers (3 papers)

Download All Papers

Order results

Result details

Show export options Show export options

Select all

Export citation of selected articles as:

Research

Jump to: Review

15 pages, 3847 KiB

Open AccessArticle

New Insights into the Effect of Ce Doping on the Catalytic Performance and Hydrothermal Stability of Cu-USY Zeolite Catalysts for the Selective Catalytic Reduction of NO with NH₃

and

Catalysts 2023, 13(12), 1485; https://doi.org/10.3390/catal13121485 - 30 Nov 2023

Viewed by 237

Abstract

5Cu-USY and Ce-doped 5Cu8Ce-USY zeolite catalysts were prepared by the conventional impregnation method. The obtained catalysts were subjected to the hydrothermal ageing process. The catalytic performance of the selective catalytic reduction of NO_x with NH₃ (NH₃-SCR) was evaluated on both fresh and aged catalysts. Physical/chemical characterizations such as X-ray diffraction (XRD), H₂ temperature-programmed reduction (H₂-TPR), and X-ray photoelectron spectroscopy (XPS) were performed, along with detailed in situ diffuse reflectance infrared Fourier-transform spectroscopy (DRIFTS) experiments including CO adsorption, NH₃ adsorption, and NO + O₂ reactions. Results showed that, for the 5Cu-USY catalyst, hydrothermal ageing treatment could somehow improve the low-temperature SCR activity, but it also led to significant formation of unfavorable byproducts NO₂ and N₂O. Such an activity change can be attributed to hydrothermal ageing inducing the migration of isolated Cu⁺ species in the sodalite cavities towards the super cages of the USY zeolites. The increased content of Cu⁺ species in the super cages was beneficial for the low-temperature activity improvement, but, at the same time, it also facilitated ammonia oxidation at high temperatures. Ce doping after hydrothermal ageing has a “double-edged sword” effect on the catalytic performance. First of all, Ce doping can inhibit Cu species migration by self-occupying the internal cage sites; thus, the catalytic performance of 5Cu8Ce-USY-700H remains stable after ageing. Secondly, Ce doping introduces a CuO_x–CeO₂ strong interaction, which facilitates lattice oxygen mobility by forming more oxygen vacancies so as to increase the concentration of surface active oxygen. These changes, on the one hand, could help to promote further oxidative decomposition of nitrate/nitrite intermediates and improve the catalytic performance. But, on the other hand, it also causes the byproduct generation to become more severe. Full article

(This article belongs to the Special Issue Catalysts for Mobile Source: Low-Carbon and Pollution Emission Control)

► Show Figures

Figure 1

11 pages, 6021 KiB

Open AccessArticle

Enhanced Soot Oxidation Activity of a CuO-Doped CeO₂ Catalyst via Acid Etching

and

Catalysts 2023, 13(12), 1463; https://doi.org/10.3390/catal13121463 - 23 Nov 2023

Viewed by 287

Abstract

Copper oxides tend to agglomerate on the surface of CeO₂, with a high amount of Cu. In this study, a CeO₂ catalyst with a high CuO doping amount was treated with nitric acid to improve its catalytic performance for soot oxidation. The effect of acid etching on the structural properties of the CuO-doped CeO₂ catalyst were elucidated. The characterization results indicated that aggregated CuO particles formed over CuCe. The acid etching resulted in a remarkable increase in the surface area of CuCe. Additionally, acid etching promoted the formation of surface-adsorbed oxygen species and oxygen vacancy, and reduced the content of CuO_x species with weak interaction with CeO₂. The soot temperature-programmed oxidation results show the acid etching of CuCe catalyst could reduce the T₅₀ from 443 to 383 °C. The isothermal reaction results also suggest that acid etching of CuCe leads to an increase in reaction rate from 16.2 to 46.0 μmol min⁻¹ g⁻¹. Full article

(This article belongs to the Special Issue Catalysts for Mobile Source: Low-Carbon and Pollution Emission Control)

► Show Figures

Figure 1

Review

Jump to: Research

30 pages, 9516 KiB

Open AccessReview

Application of Unconventional External-Field Treatments in Air Pollutants Removal over Zeolite-Based Adsorbents/Catalysts

and

Catalysts 2023, 13(12), 1461; https://doi.org/10.3390/catal13121461 - 23 Nov 2023

Viewed by 556

Abstract

Zeolite-based materials are widely used as adsorbents and catalysts for purifying air pollutants like NO_x and VOCs due to abundant pore structure, regular pore distribution, and numerous ion exchange sites. Thermal treatment is a necessary procedure for both removing impurities in pores and promoting the metal active dispersed evenly before the zeolite-based adsorbents/catalysts were applied for purifying the NO_x/VOCs. Nevertheless, the conventional thermal field treatment (i.e., high-temperature calcination, high-temperature purging, etc.) takes large energy consumption. In contrast, unconventional external-field treatments such as non-thermal plasma and microwave show significant advantages of high efficiency, low energy consumption as well and low pollution, which were used to substitute the traditional thermal treatment in many fields. In this paper, the roles of non-thermal plasma or microwave in the adsorption/catalysis of the NO_x/VOCs are reviewed from three aspects assisting activation of materials, cooperative catalysis process, and assisting zeolites synthesis. The reasons for unconventional treatments in improving textural properties, active sites, performance, etc. of zeolite-based materials were illuminated in detail. Moreover, the influences of various parameters (i.e., power, time, temperature, etc.) on the above aspects are elaborated. It is hoped that this review could provide some advanced guidance for the researchers to develop highly efficient materials. Full article

(This article belongs to the Special Issue Catalysts for Mobile Source: Low-Carbon and Pollution Emission Control)

► Show Figures

Journal Menu

Journal Browser

Special Issue "Catalysts for Mobile Source: Low-Carbon and Pollution Emission Control"

Share This Special Issue

Special Issue Editors

Special Issue Information

Keywords

Published Papers (3 papers)

Research

Review

Further Information

Guidelines

MDPI Initiatives

Follow MDPI