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Catalysts
Special Issues
Heterogeneous Catalysts in Environmental Applications and in Energy Generation
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Heterogeneous Catalysts in Environmental Applications and in Energy Generation

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

Deadline for manuscript submissions: closed (31 October 2020) | Viewed by 8620

Special Issue Editors

Prof. Dr. Renaud Cousin

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Guest Editor
Unité de Chimie Environmentale et Interactions sur le Vivant (UCEIV EA 4492), 145 Avenue Maurice Schumann, Dunkerque, France
Interests: VOC total oxidation; heterogeneous catalysis; environmental catalysis
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Svetlana Ivanova

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Guest Editor
Department of Inorganic Chemistry, Institute of Materials Science of Sevilla, University of Seville, 41092 Seville, Spain
Interests: Design and application of heterogeneous catalysts, CO and hydrocarbons oxidation, H2 clean-up processes, biorefinery, CO2 capture and utilization, biomass chemical valorization
Special Issues, Collections and Topics in MDPI journals
Dr. Satu Ojala

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Guest Editor
Evironmental and Chemical Engineering, Faculty of Technology, POB 4300, 90014 University of Oulu, Oulu, Finland
Interests: Environmental catalysis, VOC total oxidation, heterogeneous catalysis, photocatalysis, operando spectroscopy, catalyst characterization, by-products and waste as raw materials for catalysts and adsorbents, utilization of gaseous emissions

Special Issue Information

Dear Colleagues,

The world energy consumption is expected to continue to increase dramatically in the coming years along with associated environmental issues. Although there is no universal solution to solve all energy- and environment-related problems, heterogeneous catalysis offers multiple ways to approach sustainable development and environmental safety.
This Special Issue of Catalysts aims to cover the recent progress and novel trends in the field of Heterogeneous Catalysts in Environmental Applications and in Energy Generation.  Potential topics include, but are not limited to, the following:

  • Catalytic removal of air and water pollutants
  • Catalytic abatement of model pollutants and real mixtures of pollutants
  • CO2 conversion and utilization
  • Biomass valorization
  • Biofuel production
  • Design of innovative catalytic materials for environmental applications or energy generation
  • …

Authors with expertise in these topics are cordially invited to submit their manuscripts to Catalysts. Significant full original papers and review articles are welcome.

Prof. Dr. Renaud Cousin
Dr. Satu Ojala
Prof. Dr. Svetlana Ivanova
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

  • Catalytic oxidation
  • Valorization of gases and solid waste
  • Catalytic emission treatment
  • Energy
  • Catalytic water purification
  • Biomass

Published Papers (3 papers)

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Research

20 pages, 3554 KiB  
Article
Preparation of Granulated Biomass Carbon Catalysts—Structure Tailoring, Characterization, and Use in Catalytic Wet Air Oxidation of Bisphenol A
by Riikka Juhola, Anne Heponiemi, Sari Tuomikoski, Tao Hu, Mika Huuhtanen, Davide Bergna and Ulla Lassi
Catalysts 2021, 11(2), 251; https://0-doi-org.brum.beds.ac.uk/10.3390/catal11020251 - 13 Feb 2021
Cited by 4 | Viewed by 2783
Abstract
New carbonized biomass–metakaolin (PSD/MK_Fe) granular composite catalyst materials were manufactured for the catalytic wet air oxidation (CWAO) of bisphenol A (BPA). These catalysts were characterized using different analytical and spectroscopic techniques, and results showed that the catalysts’ final properties were influenced by the [...] Read more.
New carbonized biomass–metakaolin (PSD/MK_Fe) granular composite catalyst materials were manufactured for the catalytic wet air oxidation (CWAO) of bisphenol A (BPA). These catalysts were characterized using different analytical and spectroscopic techniques, and results showed that the catalysts’ final properties were influenced by the addition of metakaolin (MK), polyvinyl alcohol, boric acid, and iron. Under the optimal CWAO experimental conditions (p: 20 bar, T: 160 °C, initial pH: 5–6, c[catalyst]: 1.0 g/L), nearly complete BPA conversion (>98%) and total organic carbon (TOC) conversion of 70% were reached. A key factor behind the enhanced catalytic activity was high specific surface area, although catalytic activity was also affected by surface acidity. These results confirmed the high efficiency of the current BPA conversion process involving the use of the easily separable and reusable PSD/MK_Fe catalyst. Therefore, biomass composite catalysts can be regarded as efficient catalysts for the oxidation of BPA during the CWAO process. Full article
(This article belongs to the Special Issue Heterogeneous Catalysts in Environmental Applications and in Energy Generation)
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24 pages, 6331 KiB  
Article
On the Activity and Selectivity of CoAl and CoAlCe Mixed Oxides in Formaldehyde Production from Pulp Mill Emissions
by Tiina Laitinen, Satu Ojala, Eric Genty, Julien Brunet, Guy De Weireld, Christophe Poupin, Stéphane Siffert, Renaud Cousin and Riitta L. Keiski
Catalysts 2020, 10(4), 424; https://0-doi-org.brum.beds.ac.uk/10.3390/catal10040424 - 13 Apr 2020
Cited by 4 | Viewed by 2264
Abstract
Contaminated methanol has very good potential for being utilized in formaldehyde production instead of its destructive abatement. The activities, selectivities and stabilities of cobalt–alumina and cobalt–alumina–ceria catalysts prepared by the hydrotalcite-method were investigated in formaldehyde production from emissions of methanol and methanethiol. Catalysts [...] Read more.
Contaminated methanol has very good potential for being utilized in formaldehyde production instead of its destructive abatement. The activities, selectivities and stabilities of cobalt–alumina and cobalt–alumina–ceria catalysts prepared by the hydrotalcite-method were investigated in formaldehyde production from emissions of methanol and methanethiol. Catalysts were thoroughly characterized and the relationships between the characterization results and the catalytic performances were drawn. The preparation method used led to the formation of spinel-type structures in the form of Co2AlO4 based on x-ray diffraction (XRD) and Raman spectroscopy. Ceria seems to be present as CeO2, even though interaction with alumina is possible in the fresh catalyst. The same structure is maintained after pelletizing the cobalt–alumina–ceria catalyst. The cobalt–alumina–ceria catalyst was slightly better in formaldehyde production, probably due to lower redox temperatures and higher amounts of acidity and basicity. Methanol conversion is negatively affected by the presence of methanethiol; however, formaldehyde yields are improved. The stability of the pelletized catalyst was promising based on a 16 h experiment. During the experiment, cobalt was oxidized (Co2+ → Co3+), cerium was reduced (Ce4+ → Ce3+) and sulfates were formed, especially on the outer surface of the pellet. These changes affected the low temperature performance of the catalyst; however, the formaldehyde yield was unchanged. Full article
(This article belongs to the Special Issue Heterogeneous Catalysts in Environmental Applications and in Energy Generation)
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14 pages, 3523 KiB  
Article
Silica Nanoflowers-Stabilized Pickering Emulsion as a Robust Biocatalysis Platform for Enzymatic Production of Biodiesel
by Lihui Wang, Xinlong Liu, Yanjun Jiang, Peng Liu, Liya Zhou, Li Ma, Ying He, Heyu Li and Jing Gao
Catalysts 2019, 9(12), 1026; https://0-doi-org.brum.beds.ac.uk/10.3390/catal9121026 - 04 Dec 2019
Cited by 17 | Viewed by 2798
Abstract
Enzymatic production of biodiesel had attracted much attention due to its high efficiency, mild conditions and environmental protection. However, the high cost of enzyme, poor solubility of methanol in oil and adsorption of glycerol onto the enzyme limited the popularization of the process. [...] Read more.
Enzymatic production of biodiesel had attracted much attention due to its high efficiency, mild conditions and environmental protection. However, the high cost of enzyme, poor solubility of methanol in oil and adsorption of glycerol onto the enzyme limited the popularization of the process. To address these problems, we developed a silica nanoflowers-stabilized Pickering emulsion as a biocatalysis platform with Candida antarctica lipase B (CALB) as model lipase for biodiesel production. Silica nanoflowers (SNFs) were synthesized in microemulsion and served as a carrier for CALB immobilization and then used as an emulsifier for constructing Pickering emulsion. The structure of SNFs and the biocatalytic Pickering emulsion (CALB@SNFs-PE) were characterized in detail. Experimental data about the methanolysis of waste oil to biodiesel was evaluated by response surface methodology. The highest experimental yield of 98.5 ± 0.5% was obtained under the optimized conditions: methanol/oil ratio of 2.63:1, a temperature of 45.97 °C, CALB@SNFs dosage of 33.24 mg and time of 8.11 h, which was closed to the predicted value (100.00%). Reusability test showed that CALB@SNFs-PE could retain 76.68% of its initial biodiesel yield after 15 cycles, which was better than that of free CALB and N435. Full article
(This article belongs to the Special Issue Heterogeneous Catalysts in Environmental Applications and in Energy Generation)
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