1
|
Zhang T, Ma X, Cao J, Gong J, Jiang W, Cao H, Wang Y. Effect of B-Site Element on the Structure and Catalytic Performance for Toluene of the 3DOM CeBO 3 Catalyst. Inorg Chem 2023; 62:6352-6360. [PMID: 37045789 DOI: 10.1021/acs.inorgchem.3c00131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/14/2023]
Abstract
A series of 3DOM cerium-based perovskite catalysts with different B-site elements were prepared by the colloidal crystal template method and excess impregnation method with Cr, Ni, and Mn as the B-site elements. The physical and chemical properties of the catalysts were investigated by X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), hydrogen temperature-programmed reduction (H2-TPR), and oxygen temperature-programmed desorption (O2-TPD) characterization techniques. The results showed that the catalyst with Mn as the B-site element had a high-quality macropore structure (pore size 200-250 nm), large specific surface area (45.26 m2/g), and abundant surface adsorbed oxygen content (Oads/Olatt = 0.46). The addition of manganese enhanced the low-temperature reducibility, and the main reduction peak was below 400 °C. The O2-TPD results showed that 3DOM CeMnO3 expressed the highest adsorption oxygen content. The 3DOM CeMnO3 possessed the best catalytic performance with T50% = 102 °C and T90% = 203 °C during the catalytic oxidation of toluene. Intermediate product study hinted that toluene was first converted into benzoic acid and benzaldehyde and then further degraded into small molecules. The catalyst with the best activity also exhibited good stability, and toluene degradation rate remained above 85% at 200°C for more than 20 h of continuous experiments.
Collapse
Affiliation(s)
- Tianjiao Zhang
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, P. R. China
| | - Xiubiao Ma
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, P. R. China
| | - Jiawei Cao
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, P. R. China
| | - Jingyu Gong
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, P. R. China
| | - Wenchun Jiang
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, P. R. China
| | - Huaixiang Cao
- Shandong Giant E-Tech Co., Ltd, Jinan 250102, P. R. China
| | - Yongqiang Wang
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, P. R. China
- State Key Laboratory of Petroleum Pollution Control, Qingdao 266580, P. R. China
| |
Collapse
|
2
|
Jain A, Tamhankar S, Jaiswal Y. Role of La-based perovskite catalysts in environmental pollution remediation. REV CHEM ENG 2023. [DOI: 10.1515/revce-2022-0034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
Abstract
Abstract
Since the advent of the industrial revolution, there has been a constant need of efficient catalysts for abatement of industrial toxic pollutants. This phenomenon necessitated the development of eco-friendly, stable, and economically feasible catalytic materials like lanthanum-based perovskite-type oxides (PTOs) having well-defined crystal structure, excellent thermal, and structural stability, exceptional ionic conductivity, redox behavior, and high tunability. In this review, applicability of La-based PTOs in remediation of pollutants, including CO, NO
x
and VOCs was addressed. A framework for rationalizing reaction mechanism, substitution effect, preparation methods, support, and catalyst shape has been discussed. Furthermore, reactant conversion efficiencies of best PTOs have been compared with noble-metal catalysts for each application. The catalytic properties of the perovskites including electronic and structural properties have been extensively presented. We highlight that a robust understanding of electronic structure of PTOs will help develop perovskite catalysts for other environmental applications involving oxidation or redox reactions.
Collapse
Affiliation(s)
- Anusha Jain
- Chemical Engineering Department , Indian Institute of Technology Delhi , New Delhi 110016 , India
| | - Sarang Tamhankar
- Chemical Engineering Department , Institute of Chemical Technology Mumbai , Maharastra 400019 , India
| | - Yash Jaiswal
- Chemical Engineering Department, Faculty of Technology , Dharmsinh Desai University Nadiad , Gujarat 387001 , India
| |
Collapse
|
3
|
Review of Emission Characteristics and Purification Methods of Volatile Organic Compounds (VOCs) in Cooking Oil Fume. Processes (Basel) 2023. [DOI: 10.3390/pr11030705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023] Open
Abstract
Volatile organic compounds (VOCs) in cooking oil fumes need to be efficiently removed due to the significant damage they cause to the environment and human health. This review discusses the emission characteristics, which are influenced by different cooking temperatures, cooking oils, and cuisines. Then, various cooking oil fume purification methods are mainly classified into physical capture, chemical decomposition, and combination methods. VOCs removal rate, system operability, secondary pollution, application area, and cost are compared. The catalytic combustion method was found to have the advantages of high VOC removal efficiency, environmental protection, and low cost. Therefore, the last part of this review focuses on the research progress of the catalytic combustion method and summarizes its mechanisms and catalysts. The Marse-van Krevelen (MVK), Langmuir-Hinshelwood (L-H), and Eley-Rideal (E-R) mechanisms are analyzed. Noble metal and non-noble metal catalysts are commonly used. The former showed excellent activity at low temperatures due to its strong adsorption and electron transfer abilities, but the high price limits its application. The transition metals primarily comprise the latter, including single metal and composite metal catalysts. Compared to single metal catalysts, the interaction between metals in composite metal catalysts can further enhance the catalytic performance.
Collapse
|
4
|
Dong N, Ye Q, Zhang D, Xiao Y, Dai H. Reduced graphene oxide as an effective promoter to the layered manganese oxide-supported Ag catalysts for the oxidation of ethyl acetate and carbon monoxide. JOURNAL OF HAZARDOUS MATERIALS 2022; 431:128518. [PMID: 35219061 DOI: 10.1016/j.jhazmat.2022.128518] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Revised: 02/09/2022] [Accepted: 02/17/2022] [Indexed: 06/14/2023]
Abstract
The layered manganese oxide (δ-MnO2)-supported reduced graphene oxide (rGO)-promoted silver catalysts (xAg- yrGO/δ-MnO2; x and y are the Ag and rGO contents (wt%), respectively) were prepared via a polyvinyl alcohol-protected reduction route. Physicochemical properties of these materials were determined using the numerous techniques, and their catalytic activities were evaluated for the oxidation of CO and ethyl acetate. It is found that the loading of rGO as an electron transfer promoter could significantly strengthen the metal-support interaction (SMSI) between Ag and δ-MnO2 and increase specific surface area of the sample, hence improving catalytic performance of the sample. Activity evaluation reveals that 1Ag- 1.0rGO/δ-MnO2 showed the best catalytic activity and the lowest apparent activation energy (Ea), giving a T90% of 140 °C and an Ea of 42.7 kJ/mol for CO oxidation, and a T90% of 160 °C and an Ea of 39.8 kJ/mol for ethyl acetate oxidation at space velocity (SV) = 60,000 mL/(g h). The good performance of 1Ag- 1.0rGO/δ-MnO2 was associated with its high Mn3+/Mn4+ or Oads/Olatt molar ratio, good low-temperature reducibility, and strong SMSI between Ag and δ-MnO2. The in situ DRIFTS characterization demonstrates that the carbonate and acetate species were the main intermediate products in CO and ethyl acetate oxidation over 1Ag- 1.0rGO/δ-MnO2, respectively. The 1Ag- 1.0rGO/δ-MnO2 sample was not significantly altered in physicochemical property after 55 h of stability test, but its activity decreased in the presence of water vapor, especially such an effect on ethyl acetate oxidation was more obvious, which was possibly due to the competitive adsorption of water and reactants on the catalyst surface.
Collapse
Affiliation(s)
- Ning Dong
- Key Laboratory of Beijing on Regional Air Pollution Control, Department of Environmental Science, School of Environmental and Chemical Engineering, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
| | - Qing Ye
- Key Laboratory of Beijing on Regional Air Pollution Control, Department of Environmental Science, School of Environmental and Chemical Engineering, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China.
| | - Dan Zhang
- Key Laboratory of Beijing on Regional Air Pollution Control, Department of Environmental Science, School of Environmental and Chemical Engineering, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
| | - Yang Xiao
- Key Laboratory of Beijing on Regional Air Pollution Control, Department of Environmental Science, School of Environmental and Chemical Engineering, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
| | - Hongxing Dai
- Beijing Key Laboratory for Green Catalysis and Separation, Key Laboratory of Beijing on Regional Air Pollution Control, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Beijing 100124, China; Laboratory of Catalysis Chemistry and Nanoscience, Department of Environmental Chemical Engineering, School of Environmental and Chemical Engineering, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China.
| |
Collapse
|
5
|
Zhang L, Yang Y, Li Y, Wu J, Wu S, Tan X, Hu Q. Highly efficient UV-visible-infrared photothermocatalytic removal of ethyl acetate over a nanocomposite of CeO2 and Ce-doped manganese oxide. CHINESE JOURNAL OF CATALYSIS 2022. [DOI: 10.1016/s1872-2067(21)63816-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|
6
|
Zhang W, Liu Z, Chen P, Zhou G, Liu Z, Xu Y. Preparation of Supported Perovskite Catalyst to Purify Membrane Concentrate of Coal Chemical Wastewater in UV-Catalytic Wet Hydrogen Peroxide Oxidation System. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:4906. [PMID: 34064535 PMCID: PMC8125239 DOI: 10.3390/ijerph18094906] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 04/20/2021] [Accepted: 04/21/2021] [Indexed: 11/16/2022]
Abstract
The effective treatment of membrane concentrate is a major technical challenge faced by the new coal chemical industry. In this study, a supported perovskite catalyst LaCoO3/X was prepared by a sol-impregnation two-step method. The feasibility of the supported perovskite catalyst LaCoO3/X in the UV-catalytic wet hydrogen peroxide oxidation (UV-CWPO) system for the purification of concentrated liquid of coal chemical wastewater was investigated. The effects of catalyst support, calcination temperature, calcination time, and re-use time on catalytic performance were investigated by batch experiments. The catalysts were characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET), and X-ray photoelectron spectroscopy (XPS). Experimental results showed that the supported perovskite catalyst LaCoO3/CeO2 prepared using CeO2 as support, calcination temperature of 800 °C, and calcination time of 8 h had the best catalytic effect. The catalytic performance of the catalyst remained excellent after seven cycles. The best prepared catalyst was used in UV-CWPO of coal chemical wastewater membrane concentrate. The effects of H2O2 dosage, reaction temperature, reaction pressure, and catalyst dosage on UV-CWPO were determined. Under the conditions of H2O2 dosage of 40 mM, reaction temperature of 120 °C, reaction pressure of 0.5 MPa, catalyst dosage of 1 g/L, pH of 3, and reaction time of 60 min, the removal efficiencies of COD, TOC, and UV254 were 89.7%, 84.6%, and 98.1%, respectively. Under the optimal operating conditions, the oxidized effluent changed from high toxicity to non-toxicity, the BOD5/COD increased from 0.02 to 0.412, and the biodegradability of the oxidized effluent was greatly improved. The catalyst has a simple synthesis procedure, excellent catalytic performance, and great potential in the practical application of coal chemical wastewater treatment.
Collapse
Affiliation(s)
| | | | | | | | - Zhiying Liu
- College of Environmental Science and Engineering, Nanjing Tech University, Nanjing 211800, China; (W.Z.); (Z.L.); (P.C.); (G.Z.)
| | - Yanhua Xu
- College of Environmental Science and Engineering, Nanjing Tech University, Nanjing 211800, China; (W.Z.); (Z.L.); (P.C.); (G.Z.)
| |
Collapse
|
7
|
Dong N, Fu J, Ye Q, Chen M, Fu Z, Dai H. Effect of Preparation Method on Catalytic Performance of Ag/OMS-2 for the Oxidation of Ethyl Acetate and Formaldehyde. CATALYSIS SURVEYS FROM ASIA 2020. [DOI: 10.1007/s10563-020-09311-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
8
|
|
9
|
Moreno-Román EJ, Cruz-López A, García-Gómez C, Zanella R, Suárez-Vázquez SI. Evaluation of the catalytic oxidation of soot by CeO X-LaMnO 3 at different O 2 pressures synthesized by ultrasonic-assisted hydrothermal method. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:15475-15487. [PMID: 32077020 DOI: 10.1007/s11356-020-08003-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Accepted: 02/05/2020] [Indexed: 06/10/2023]
Abstract
In this work, the synthesis of catalyst with perovskite structure and chemical formula La1-XCeXMnO3 at x = 0 - 0.5 were successfully obtained by an ultrasonic-assisted hydrothermal method. Results show that the addition of Ce in La1-XCeXMnO3 have not substantial effect in textural and morphological properties; however, the formation of a new crystalline phase with final composition CeOX-La1-XCeXMnO3 was detected at values x > 0.3. All synthesized catalysts were tested in the soot oxidation under both, loose and tight contact in 20% O2/N2 or 5% O2/N2 atmospheres. CeOX-La1-XCeXMnO3 at x = 0.3 resulted in the best catalytic activity with activation energy values of 57.9 kJ.mol-1. The interaction between Ce3+ and Mn4+ species in this catalyst can transfer electrons generating Mn3+ and Ce4+. This reduction from Mn4+ to Mn3+ is accompanied by migration of vacancies to the surface promoting the adsorbed oxygen from the gas phase, need for balancing the chemical states. By increasing the temperature above 300 °C, the bulk oxygen migration to the surface is enhanced being the responsible for the oxygen availability. The formation of CeOX-La1-XCeXMnO3 promotes a stable redox cycle allowing the reusability of this catalyst even at low oxygen pressures after three different reaction cycles.
Collapse
Affiliation(s)
- Eddy Jonatan Moreno-Román
- Universidad Autónoma de Nuevo León, Facultad de Ingeniería Civil, Av. Universidad S/N, Cd. Universitaria, 66455, San Nicolás de los Garza, Nuevo León, México
| | - Arquímedes Cruz-López
- Universidad Autónoma de Nuevo León, Facultad de Ingeniería Civil, Av. Universidad S/N, Cd. Universitaria, 66455, San Nicolás de los Garza, Nuevo León, México
| | - Celestino García-Gómez
- Universidad Autónoma de Nuevo León, Facultad de Agronomía, Francisco Villa, S/N, 66050, General Escobedo, Nuevo León, México
| | - Rodolfo Zanella
- Instituto de Ciencias Aplicadas y Tecnología, Universidad Nacional Autónoma de México, Circuito Exterior S/N, C.U, 04510, Ciudad de México, México
| | - Santiago Iván Suárez-Vázquez
- Universidad Autónoma de Nuevo León, Facultad de Ingeniería Civil, Av. Universidad S/N, Cd. Universitaria, 66455, San Nicolás de los Garza, Nuevo León, México.
| |
Collapse
|