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Special Issue "Catalysis for the Removal of Gas-Phase Pollutants"
Deadline for manuscript submissions: 30 November 2019.
Instituto de Tecnología Química (ITQ), Universitat Politècnica València-CSIC, Valencia, Spain
Interests: Environmental catalysis, environmental technology, air pollution (catalytic removal of NOx, Sox, and Cl–COVs) and water pollution (catalytic removal of nitrates and bromates)
As you know, air pollution is one of the most concerning world issues. According to the World Health Organization (WHO), more than 80% of people living in urban areas that monitor air pollution are exposed to air pollution levels that exceed the WHO recommended limits. While all regions of the world are affected, populations in low- and middle-income countries are the most impacted, and it is estimated that air pollution could cause 6 to 9 million premature deaths per year by 2060. In 2015, WHO and the Organisation for Economic Co-operation and Development (OECD) calculated that the economic cost of premature death and disability from air pollution in Europe is close to USD 1.6 trillion and will reach 1% of the global gross domestic product (GDP) by 2060.
Although the emissions of the main pollutants have decreased in the last years in developed countries as a result of more stringent emission limits, the global production of air pollutants has increased because of the emissions of newly industrialized countries. New technologies that contribute to the reduction of these emissions are a matter of urgent necessity. In this context, catalysis is playing an important role in the control of pollutants, and many of the technologies used for air pollutants abatement are based on the use of different catalysts. It is expected that the discovery and preparation of new materials and the understanding of the catalytic reaction mechanisms will result in the development of new catalytic technologies for the control of the gas-phase pollutants.
Submissions to this Special Issue on “Catalysis for the Removal of Gas-Phase Pollutants” are welcome in the form of original research papers or short reviews that reflect the state of research on this important subject in the following topics: catalytic control from stationary and mobile sources, catalysis for the reduction of greenhouse gases, catalytic abatement of NOx, VOCs, SOX, Cl-compounds, COx, ozone decomposition, household air pollution, catalytic oxidation and catalytic reduction of gas-phase pollutants, mechanisms for these reactions, and catalyst characterization and stability .
Dr. Antonio Eduardo Palomares
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 papers will be 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 1600 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.
- ozone decomposition
- catalytic oxidation
- catalytic reduction
- reaction mechanism
- catalyst characterization
The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.
Title: Recycling of gas phase residual dichloromethane by hydrodechlorination: Regeneration of deactivated Pd/C catalysts.
Abstract: Dichloromethane (DCM) is an important pollutant, with very harmful effects on human health and the environment. Among the available technologies for its removal from gas streams, the recycling to valuable hydrocarbons like alkanes or olefins of low molecular weight by catalytic hydrodeclorination appears as a very interesting alternative. When compared to other precious metals, the use of Pd on supported catalysts showed the better performance in obtaining hydrocarbons with more than one carbon atom or light olefins (C2-C4). However, the catalyst showed a significant deactivation during the reaction. In this study, the evolution of the oxidation state and particle size of Pd was monitored with time on stream in order to elucidate the causes of the deactivation of the catalyst. These were mainly ascribed to the irreversible chemisorption of reactants and reaction products in the active centers, which led to the formation of new PdCx phases. Nevertheless, the catalyst was regenerated by oxidizing treatment at 250 °C, recovering more than 80 % of initial DCM conversion.
Title: Model studies of catalytic CO abatement: single crystals, structure libraries, supported particles
Authors: Suchorski, G. Rupprechter
Affiliation: Institute of Materials Chemistry, Technische Universität Wien, 1060 Vienna, Austria
Abstract: The surfaces of noble metal single crystals have served for long as successful model systems enabling studies of catalytic CO abatement from combustion engines exhausts. However, the materials gap between single crystals and supported nanoparticles of technological catalysts calls for more realistic model systems. In recent years, new types of model systems have been established, exhibiting regions of different crystallographic orientations or different particle sizes within one sample: polycrystalline foils of precious metals, consisting of many µm-sized domains of different structures, differently sized curved crystals with differently oriented facets and metal powder aggregates supported on thin oxide films. The signature property of such model systems is the possibility to examine the inherent catalytic properties of different crystallographic orientations/particle sizes simultaneously under identical reaction conditions by spatially-resolved kinetic experiments (photoelectron and field ion/electron microscopy). Such heterogeneous model systems can be considered as surface structure libraries from which the desired surface structure can be chosen from dozens or even hundreds present on the specimen. In the present contribution we discuss some new insights into catalytic ignition, reaction front propagation, and long-ranging metal/oxide interface effects in catalytic CO oxidation, obtained using these model systems and the novel kinetics by imaging approach.
Title: Cobalt oxide catalysts in the form of thin films prepared by magnetron sputtering on stainless steel meshes: performance in ethanol oxidation
Authors: Květa Jirátová 1,*, Roman Perekrestov 2 , Michaela Dvořáková 3, Jana Balabánová 1, Pavel Topka 1, Martin Koštejn 1, Jiří Olejníček 2, Martin Čada 2, Zdeněk Hubička 2, and František Kovanda 3
Affiliation: 1 Institute of Chemical Process Fundamentals of the CAS, v.v.i., Rozvojová 135, 165 02 Prague, Czech Republic;
2 Institute of Physics of the CAS, v.v.i., Na Slovance 2, 182 21 Prague, Czech Republic
3 Department of Solid State Chemistry, University of Chemistry and Technology, Technická 5, 166 28 Prague, Czech Republic
Abstract: Emissions of volatile organic compounds (VOC) in industrial gases can be reduced applying the catalytic total oxidation. Catalysts in the form of meshes are interesting as they minimize the effect of internal diffusion of reactants during the reaction and as well as the need of expensive active components. In this paper, various conditions of radio frequency magnetron sputtering of cobalt on stainless steel meshes was applied during catalyst preparation. Properties of the supported Co3O4 catalysts were characterized by SEM, XRD, TPR, FTIR, XPS, and Raman spectroscopy. Catalytic activity was examined in deep oxidation of ethanol chosen as a model VOC. Performance of the catalysts depended on the amount of Co3O4 deposited on the supporting meshes. According to specific activities (the amounts of ethanol converted per unit weight of Co3O4) smaller Co3O4 particle size led to increased catalytic activity. The catalyst prepared by sputtering in an Ar+O2 atmosphere without calcination showed the highest catalytic activity, which decreased after calcination due to enlargement of Co3O4 particles. However, specific activity of this catalyst was more than 20 times higher than that of pelletized commercial Co3O4 catalyst used for comparison.
Title: VOC Removal from Manure Gaseous Emissions with UV Light
Abstract: Control of gaseous emissions from livestock operations is needed to assure compliance with environmental regulations and sustainability of the industry. The focus of this research was to mitigate livestock odor emissions with UV light. Effects of the UV dose, wavelength, TiO2 catalyst, air temperature and relative humidity were tested at lab scale on a synthetic mixture of 9 odorous volatile organic compounds (VOCs) and real poultry manure offgas. Results show that it was feasible to control odorous VOCs with both photolysis and photocatalysis (synthetic VOCs mixture) and with photocatalysis (manure offgas). The treatment effectiveness R (defined as % conversion), was proportional to the light intensity for synthetic VOCs mixtures and followed an order of UV185+254 + TiO2 > UV254+TiO2 > UV185+254; no catalyst > UV254; no catalyst. VOC conversion R>80% was achieved when light energy was > 10 J. The use of deep UV (UV185+254) improved the R particularly when photolysis was the primary treatment. Odor removal up to ~80% was also observed for synthetic VOCs mixture, and actual poultry manure offgas. R from ~80 to nearly 100% at a treatment time of at least ~5 s. Scale-up studies are warranted.