Advances in Catalytic Oxidation of Hydrocarbons and Volatile Organic Compounds (VOCs)

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

Deadline for manuscript submissions: closed (10 September 2022) | Viewed by 10564

Special Issue Editors


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Guest Editor
Department of Electrical and Computer Engineering, Purdue University, West Lafayette, IN 47907, USA
Interests: catalysts; environmental application

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Guest Editor
College of Chemistry, Central China Normal University, Wuhan 430079, China
Interests: environmental catalysis; catalytic oxidation of VOCs; nanomaterial engineering; electrochemical reactions

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Guest Editor
School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Interests: environmental catalysis; heterogeneous catalysis in environment; catalytic oxidation of VOCs; advanced oxidation process for aqueous-polluted organic matter removal
William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH 43210, USA
Interests: energy storage and electrocatalysis applications; oxygen evolution reaction; electrochemical reduction of carbon dioxide; Li-ion batteries

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Guest Editor
School of Resources and Environmental Engineering, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China
Interests: Catalytic oxidation of industry exhaust volatile organic compounds, and advanced oxidation process for aqueous-polluted organic matter removal; Indoor air cleaner technology, such as formaldehyde, ozone decomposition; bio-aerosol disinfection; cost-effective indoor dehumidification

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Guest Editor
State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
Interests: environmental catalysis; catalytic oxidation of VOCs; photocatalytic oxidation of micro-organic contaminants; interfacial catalysis; adsorption material

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Guest Editor
School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China
Interests: environmental catalysis; catalytic oxidation of VOCs; catalytic reforming of tar; photocatalytic oxidation of organic pollutant

Special Issue Information

Dear Colleagues, 

This is a Special Issue on the recent advances in catalysts that are used in oxidation of hydrocarbons and Volatile Organic Compounds (VOCs), which include halogenated hydrocarbons, alcohols, aldehydes, aromatics, alkanes, ketones, olefins, ethers, esters, paraffins, sulfur-containing compounds, and others. We are requesting submissions showcasing both computational calculations as well as experimental results. Additionally, applied studies focusing on investigating catalysts in realistic environments and improving stability are of interest. New methodologies for in situ and operando catalyst characterization are welcome. We hope to compile a set of manuscripts that inform the field of the state-of-the-art in catalysis.

Dr. Yanliu Dang
Prof. Dr. Zhu Luo
Prof. Dr. Shaopeng Rong
Dr. Jianhang Shi
Prof. Dr. Jinlong Wang
Dr. Tongzhou Xu
Prof. Dr. Xuehua Zou
Guest Editors

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Published Papers (6 papers)

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Research

13 pages, 2056 KiB  
Article
Insight into the Effect of Oxygen Vacancy Prepared by Different Methods on CuO/Anatase Catalyst for CO Catalytic Oxidation
by Wei Chen, Huan Shen, Xiaoxiao Zhu, Guoli Liu, Chuanqi Pan, Fajun Huang, Yarong Fang, Yanbing Guo and Zhu Luo
Catalysts 2023, 13(1), 70; https://doi.org/10.3390/catal13010070 - 30 Dec 2022
Viewed by 1620
Abstract
In this study, CuO loaded on anatase TiO2 catalysts (CuO/anatase) with oxygen vacancies was synthesized via reduction treatments by NaHB4 and H2 (CuO/anatase-B, CuO/anatase-H), respectively. The characterizations suggest that different reduction treatments bring different concentration of oxygen vacancies in the [...] Read more.
In this study, CuO loaded on anatase TiO2 catalysts (CuO/anatase) with oxygen vacancies was synthesized via reduction treatments by NaHB4 and H2 (CuO/anatase-B, CuO/anatase-H), respectively. The characterizations suggest that different reduction treatments bring different concentration of oxygen vacancies in the CuO/anatase catalysts, which finally affect the CO catalytic performance. The CuO/anatase-B and CuO/anatase-H exhibit CO conversion of 90% at 182 and 198 °C, respectively, which is lower than what occurred for CuO/anatase (300 °C). The XRD, Raman, and EPR results show that the amount of the oxygen vacancies of the CuO/anatase-H is the largest, indicating a stronger reduction effect of H2 than NaHB4 on the anatase surface. The in situ DRIFTS results exhibit that the Cu sites are the adsorption sites of CO, and the oxygen vacancies on the anatase can active the O2 molecules into reactive oxygen species. According to the in situ DRIFTS results, it can be concluded that in the CO oxidation reaction, only the CuO/anatase-H catalyst can be carried out by the Mvk mechanism, which greatly improves its catalytic efficiency. This study explained the reaction mechanisms of CO oxidation on various anatase surfaces, which offers detailed insights into how to prepare suitable catalysts for low-temperature oxidation reactions. Full article
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16 pages, 4987 KiB  
Article
Catalytic Combustion of Propane over Ce-Doped Lanthanum Borate Loaded with Various 3d Transition Metals
by Weilu Wang, Xudong Gong, Fang Wang, Xinyi Wei, Yanliu Dang, Yun Wu and Xianming Zhang
Catalysts 2022, 12(12), 1632; https://doi.org/10.3390/catal12121632 - 13 Dec 2022
Viewed by 1459
Abstract
Ce-doped LaBO3 (Ce0.05La0.95BO3) and a corresponding incorporation with 3d transition metals (TMs) were prepared and evaluated for eliminating propane. Our results showed the catalytic activity toward propane combustion has a close relationship with the loaded TMs, [...] Read more.
Ce-doped LaBO3 (Ce0.05La0.95BO3) and a corresponding incorporation with 3d transition metals (TMs) were prepared and evaluated for eliminating propane. Our results showed the catalytic activity toward propane combustion has a close relationship with the loaded TMs, which promoted oxygen vacancies density and further enhanced the reduction and acidity of this material. This eventually led to 90% propane conversion at 718 K for a Cu-loaded Ce0.05La0.95BO3 catalyst. During 10 h of catalytic propane oxidation, the propane-elimination rate was maintained very well, with no degradation of the catalyst. Full article
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12 pages, 3108 KiB  
Article
Peroxymonosulfate Activation by BaTiO3 Piezocatalyst
by Maogen Yu, Cheng Ni, Tian Hou, Weihong Guo and Jinlong Wang
Catalysts 2022, 12(11), 1452; https://doi.org/10.3390/catal12111452 - 17 Nov 2022
Cited by 3 | Viewed by 1498
Abstract
Peroxymonosulfate (PMS) plays an important role in the advanced oxidation process for environmental remediation. In this study, barium titanate (BTO) piezocatalyst was selected for the activation of PMS driven by ultrasonic power. The degradation of Rhodamine B (RhB) by BTO single component, PMS [...] Read more.
Peroxymonosulfate (PMS) plays an important role in the advanced oxidation process for environmental remediation. In this study, barium titanate (BTO) piezocatalyst was selected for the activation of PMS driven by ultrasonic power. The degradation of Rhodamine B (RhB) by BTO single component, PMS single component, and BTO/PMS double components were investigated. The results indicated that PMS can be efficiently activated by BTO under an ultrasound with an RhB degradation rate of 98% within 20 min. The ultrasound not only promoted the activation of the PMS itself, but the surface charge carriers of BTO induced by the ultrasound also contributed to the activation of PMS. ·O2, ·OH, and ·SO4 radicals were found to be the main active species that participated in the reaction. In order to verify the reaction’s environmental applicability, amoxicillin (AMX) as a typical environmental pollutant was studied. BTO/PMS displayed 80% removal efficiency of AMX, and the products generated were less toxic as demonstrated by eco-toxicity comparison. This work provides a promising strategy to improve the utilization of ultrasonic energy and apply it to the field of environmental pollutants treatment. Full article
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14 pages, 3884 KiB  
Article
Hollow CuFe2O4/MgFe2O4 Heterojunction Boost Photocatalytic Oxidation Activity for Organic Pollutants
by Zhicheng Zhang, Wei Cai, Shaopeng Rong, Hongxia Qu and Huifang Xie
Catalysts 2022, 12(8), 910; https://doi.org/10.3390/catal12080910 - 18 Aug 2022
Cited by 7 | Viewed by 1604
Abstract
P-n heterojunction-structured CuFe2O4/MgFe2O4 hollow spheres with a diameter of 250 nm were synthesized using a template-free solvothermal method, and time-dependent morphological studies were carried out to investigate the hollow formation mechanism. The CuFe2O4 [...] Read more.
P-n heterojunction-structured CuFe2O4/MgFe2O4 hollow spheres with a diameter of 250 nm were synthesized using a template-free solvothermal method, and time-dependent morphological studies were carried out to investigate the hollow formation mechanism. The CuFe2O4/MgFe2O4 with a molar ratio of 1:2 (Cu:Mg) had the highest degradation efficiency with the model organic dye Acid Orange 7, with a degradation rate of 91.96% over 60 min. The synthesized CuFe2O4/MgFe2O4 nanocomposites were characterized by XRD, TEM, HRTEM, UV-vis spectroscopy, Mott–Schottky, and EIS. Due to the synthesis of the p-n heterojunction, CuFe2O4/MgFe2O4 has efficient photogenerated carriers, and the hollow structure has a higher specific surface area and stronger adsorption capacity, which is significantly better than that of CuFe2O4 and MgFe2O4 in terms of photocatalytic performance. The outstanding performance shows that the p-n heterostructure of CuFe2O4/MgFe2O4 has potential for application in wastewater degradation. Full article
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14 pages, 9059 KiB  
Article
Catalytic Oxidation of Toluene over Fe-Rich Palygorskite Supported Manganese Oxide: Characterization and Performance
by Shiwei Dong, Tianhu Chen, Fan Xu, Haibo Liu, Can Wang, Yinsheng Zhang, Minghao Ji, Chengrui Xu, Chengzhu Zhu, Zhiguo Li and Xuehua Zou
Catalysts 2022, 12(7), 763; https://doi.org/10.3390/catal12070763 - 09 Jul 2022
Cited by 4 | Viewed by 1849
Abstract
A series of Fe–rich palygorskite supported manganese oxide (X%Mn–Pal) catalysts were prepared by co-precipitation method and used as catalysts for toluene oxidation. The components and structure of the as-prepared catalysts were characterized by XRD, Raman, TEM, XPS, and in situ DRIFTS. The results [...] Read more.
A series of Fe–rich palygorskite supported manganese oxide (X%Mn–Pal) catalysts were prepared by co-precipitation method and used as catalysts for toluene oxidation. The components and structure of the as-prepared catalysts were characterized by XRD, Raman, TEM, XPS, and in situ DRIFTS. The results showed that the 15%Mn–Pal catalyst exhibited the highest catalytic activity (T90 = 227 °C) and excellent cycling stability for the oxidation of toluene compared with other catalysts. The characterization results indicated that remarkable activity of the 15%Mn–Pal catalyst for toluene oxidation should be ascribed to the abundant surface oxygen vacancies. In situ DRIFTS results elucidated that benzoate was the main intermediate, which can be further oxidized into H2O and CO2. The objectives of this study are to (i) investigate the synergistic effect between Fe and Mn for toluene oxidation, (ii) develop an efficient catalyst for toluene abatement with high activity and low–cost, and (iii) promote the application of natural Fe–rich palygorskite in the control of VOCs. Full article
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17 pages, 4431 KiB  
Article
Dimethyl Ether Oxidation over Copper Ferrite Catalysts
by Maria Smyrnioti and Theophilos Ioannides
Catalysts 2022, 12(6), 604; https://doi.org/10.3390/catal12060604 - 02 Jun 2022
Cited by 3 | Viewed by 1842
Abstract
The depletion of fossil energy sources and the legislation regarding emission control demand the use of alternative fuels and rapid progression of aftertreatment technologies. The study of dimethyl ether (DME) catalytic oxidation is important in this respect, as DME is a promising clean [...] Read more.
The depletion of fossil energy sources and the legislation regarding emission control demand the use of alternative fuels and rapid progression of aftertreatment technologies. The study of dimethyl ether (DME) catalytic oxidation is important in this respect, as DME is a promising clean fuel and at the same time a VOC pollutant present in the tail gases of industrial processes. In the present work, copper ferrite catalysts synthesized via the citrate complexation method have been evaluated in DME oxidation. N2-physisorption, XRD, H2-TPR, and XPS were employed for the characterization of the mixed oxide catalysts. The copper ferrite spinel phase was detected in all samples accompanied by a gradual decrease in the bulk CuO phase upon increase in iron content, with the latter never vanishing completely. The Fe0.67Cu0.33 catalyst exhibited the highest catalytic activity in DME oxidation, attaining approximately a 4-fold higher oxidation rate compared to the respective pure copper and iron oxides. The enhanced catalytic performance was attributed to the higher specific surface area of the catalyst and its enhanced redox properties. Highly dispersed copper species were developed owing to the formation of the spinel phase. DME-TPD/TPSR experiments showed that the surface lattice oxygen of the Fe0.67Cu0.33 catalyst can oxidize preadsorbed DME at a lower temperature than all other catalysts which is in agreement with the H2-TPR findings. Full article
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