1
|
Zhang L, Zhao R, Li H, Bao J, Song L, Shan W, Zhu C. Enhanced NO x reduction on CePO 4 catalysts: Cu-loading, phosphotungstic acid, and insights from In-situ DRIFTs and DFT. JOURNAL OF HAZARDOUS MATERIALS 2024; 476:135023. [PMID: 38986406 DOI: 10.1016/j.jhazmat.2024.135023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 06/04/2024] [Accepted: 06/23/2024] [Indexed: 07/12/2024]
Abstract
This study investigates the effects of varying Cu/Ce doping ratios on the NH3-SCR denitrification efficiency using Cu-HPW/CePO4 catalysts, where CePO4 serves as the support and copper-doped phosphotungstic acid (HPW) acts as the active phase. The NH3-SCR reaction mechanism was studied by In-situ Diffuse Reflectance Infrared Fourier Transform Spectroscopy (In-situ DRIFTs) and Density Functional Theory (DFT). In-situ DRIFTs were employed to delve into the intricacies of adsorption and transformation dynamics at the surface sites of catalysts. This approach furnished a robust theoretical foundation aimed at augmenting the efficacy of low-temperature denitrification catalysts. DFT calculations were used to systematically investigate the reaction pathways, intermediates, transition states, and energy barriers over the HPW structure model to complete the NH3-SCR reaction. Empirical evidence suggests that modifying the catalysts with copper substantially enhances their denitrification efficacy and extends their operational temperature spectrum. A notable initial increase in denitrification efficiency was observed with increasing levels of copper modification, followed by a decline. Within the HPW-O15H site, the NH3-SCR reaction advances through both the E-R and L-H mechanisms, encompassing processes such as NH3 adsorption, intermediate formation and transformation, and product release.
Collapse
Affiliation(s)
- Lantian Zhang
- School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia 014000, China
| | - Ran Zhao
- College of Environment and Energy, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia 014000, China; Baotou rare earth research and development center, China.
| | - Hongxia Li
- School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia 014000, China.
| | - Jinxiao Bao
- School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia 014000, China
| | - Lijun Song
- Baotou rare earth research and development center, China
| | - Wenpo Shan
- Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Chaoyang Zhu
- School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia 014000, China
| |
Collapse
|
2
|
Zhao Z, Wang L, Lin X, Xue G, Hu H, Ma H, Wang Z, Su X, Gao Y. Effect of Tourmaline Addition on the Anti-Poisoning Performance of MnCeO x@TiO 2 Catalyst for Low-Temperature Selective Catalytic Reduction of NO x. Molecules 2024; 29:4079. [PMID: 39274928 PMCID: PMC11396665 DOI: 10.3390/molecules29174079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2024] [Revised: 08/15/2024] [Accepted: 08/17/2024] [Indexed: 09/16/2024] Open
Abstract
In view of the flue gas characteristics of cement kilns in China, the development of low-temperature denitrification catalysts with excellent anti-poisoning performance has important theoretical and practical significance. In this work, a series of MnCeOx@TiO2 and tourmaline-containing MnCeOx@TiO2-T catalysts was prepared using a chemical pre-deposition method. It was found that the MnCeOx@TiO2-T2 catalyst (containing 2% tourmaline) exhibited the best low-temperature NH3-selective catalytic reduction (NH3-SCR) performance, yielding 100% NOx conversion at 110 °C and above. When 100-300 ppm SO2 and 10 vol.% H2O were introduced to the reaction, the NOx conversion of the MnCeOx@TiO2-T2 catalyst was still higher than 90% at 170 °C, indicating good anti-poisoning performance. The addition of appropriate amounts of tourmaline can not only preferably expose the active {001} facets of TiO2 but also introduce the acidic SiO2 and Al2O3 components and increase the content of Mn4+ and Oα on the surface of the catalyst, all of which contribute to the enhancement of reaction activity of NH3-SCR and anti-poisoning performance. However, excess amounts of tourmaline led to the formation of dense surface of catalysts that suppressed the exposure of catalytic active sites, giving rise to the decrease in catalytic activity and anti-poisoning capability. Through an in situ DRIFTS study, it was found that the addition of appropriate amounts of tourmaline increased the number of Brønsted acid sites on the catalyst surface, which suppressed the adsorption of SO2 and thus inhibited the deposition of NH4HSO4 and (NH4)2HSO4 on the surface of the catalyst, thereby improving the NH3-SCR performance and anti-poisoning ability of the catalyst.
Collapse
Affiliation(s)
- Zhenzhen Zhao
- School of Advanced Agricultural Science, Weifang University, Weifang 261061, China
| | - Liyin Wang
- Institute of Power Source and Ecomaterials Science, Hebei University of Technology, Tianjin 300130, China
| | - Xiangqing Lin
- School of Advanced Agricultural Science, Weifang University, Weifang 261061, China
| | - Gang Xue
- Institute of Power Source and Ecomaterials Science, Hebei University of Technology, Tianjin 300130, China
| | - Hui Hu
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan University, Haikou 570228, China
| | - Haibin Ma
- School of Chemistry, Chemical & Environmental Engineering, Weifang University, Weifang 261061, China
| | - Ziyu Wang
- School of Advanced Agricultural Science, Weifang University, Weifang 261061, China
| | - Xiaofang Su
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan University, Haikou 570228, China
| | - Yanan Gao
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan University, Haikou 570228, China
| |
Collapse
|
3
|
Luo J, Xu S, Xu H, Zhang Z, Chen X, Li M, Tie Y, Zhang H, Chen G, Jiang C. Overview of mechanisms of Fe-based catalysts for the selective catalytic reduction of NO x with NH 3 at low temperature. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:14424-14465. [PMID: 38291211 DOI: 10.1007/s11356-024-32113-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Accepted: 01/17/2024] [Indexed: 02/01/2024]
Abstract
With the increasingly stringent control of NOx emissions, NH3-SCR, one of the most effective de-NOx technologies for removing NOx, has been widely employed to eliminate NOx from automobile exhaust and industrial production. Researchers have favored iron-based catalysts for their low cost, high activity, and excellent de-NOx performance. This paper takes a new perspective to review the research progress of iron-based catalysts. The influence of the chemical form of single iron-based catalysts on their performance was investigated. In the section on composite iron-based catalysts, detailed reviews were conducted on the effects of synergistic interactions between iron and other elements on catalytic performance. Regarding loaded iron-based catalysts, the catalytic performance of iron-based catalysts on different carriers was systematically examined. In the section on iron-based catalysts with novel structures, the effects of the morphology and crystallinity of nanomaterials on catalytic performance were analyzed. Additionally, the reaction mechanism and poisoning mechanism of iron-based catalysts were elucidated. In conclusion, the paper delved into the prospects and future directions of iron-based catalysts, aiming to provide ideas for the development of iron-based catalysts with better application prospects. The comprehensive review underscores the significance of iron-based catalysts in the realm of de-NOx technologies, shedding light on their diverse forms and applications. The hope is that this paper will serve as a valuable resource, guiding future endeavors in the development of advanced iron-based catalysts.
Collapse
Affiliation(s)
- Jianbin Luo
- School of Mechanical and Automotive Engineering, Guangxi University of Science and Technology, Liuzhou, 545006, China
- Institute of the New Energy and Energy-Saving & Emission-Reduction, Guangxi University of Science and Technology, Liuzhou, 545006, China
| | - Song Xu
- School of Mechanical and Automotive Engineering, Guangxi University of Science and Technology, Liuzhou, 545006, China
- Institute of the New Energy and Energy-Saving & Emission-Reduction, Guangxi University of Science and Technology, Liuzhou, 545006, China
| | - Hongxiang Xu
- School of Mechanical and Automotive Engineering, Guangxi University of Science and Technology, Liuzhou, 545006, China
- Institute of the New Energy and Energy-Saving & Emission-Reduction, Guangxi University of Science and Technology, Liuzhou, 545006, China
| | - Zhiqing Zhang
- School of Mechanical and Automotive Engineering, Guangxi University of Science and Technology, Liuzhou, 545006, China.
- Institute of the New Energy and Energy-Saving & Emission-Reduction, Guangxi University of Science and Technology, Liuzhou, 545006, China.
| | - Xiaofeng Chen
- Guangxi Automobile Group Co., Ltd, Liuzhou, 545007, China
| | - Mingsen Li
- School of Mechanical and Automotive Engineering, Guangxi University of Science and Technology, Liuzhou, 545006, China
- Institute of the New Energy and Energy-Saving & Emission-Reduction, Guangxi University of Science and Technology, Liuzhou, 545006, China
| | - Yuanhao Tie
- School of Mechanical and Automotive Engineering, Guangxi University of Science and Technology, Liuzhou, 545006, China
- Institute of the New Energy and Energy-Saving & Emission-Reduction, Guangxi University of Science and Technology, Liuzhou, 545006, China
| | - Haiguo Zhang
- School of Mechanical and Automotive Engineering, Guangxi University of Science and Technology, Liuzhou, 545006, China
- Institute of the New Energy and Energy-Saving & Emission-Reduction, Guangxi University of Science and Technology, Liuzhou, 545006, China
| | - Guiguang Chen
- School of Mechanical and Automotive Engineering, Guangxi University of Science and Technology, Liuzhou, 545006, China
- Institute of the New Energy and Energy-Saving & Emission-Reduction, Guangxi University of Science and Technology, Liuzhou, 545006, China
| | - Chunmei Jiang
- Institute of the New Energy and Energy-Saving & Emission-Reduction, Guangxi University of Science and Technology, Liuzhou, 545006, China
| |
Collapse
|
4
|
Ai W, Wang J, Wen J, Wang S, Tan W, Zhang Z, Liang K, Zhang R, Li W. Research landscape and hotspots of selective catalytic reduction (SCR) for NO x removal: insights from a comprehensive bibliometric analysis. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:65482-65499. [PMID: 37081369 DOI: 10.1007/s11356-023-26993-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 04/06/2023] [Indexed: 05/03/2023]
Abstract
Selective catalytic reduction (SCR) has been one of the most efficient and widely used technologies to remove nitrogen oxides (NOx). SCR research has developed rapidly in recent years, which can be reflected by the dramatic increase of related academic publications. Herein, based on the 10,627 documents from 2001 to 2020 in Web of Science, the global research landscape and hotspots in SCR are investigated based on a comprehensive bibliometric analysis. The results show that SCR research has developed positively; the annul number of articles increase sharply from 246 in 2001 to 1092 in 2020. People's Republic of China and Chinese Academy of Sciences are the most productive country and institution, respectively. The global collaboration is extensive and frequent, while People's Republic of China and USA have the most frequent research cooperation. Applied Catalysis B-Environmental is the leading publication source with 711 records. Five major research areas on SCR are identified and elaborated, including catalyst, reductant, deactivation, mechanism, and others. Zeolite is the most widely studied SCR catalyst, while copper, silver, platinum, and iron are the most popular metal elements in catalyst. Ammonia (NH3) is dominated among various SCR reductants, while hydrocarbon reductant has gained more attention. Sulfur dioxide (SO2) and vapor are the two most concerned factors leading to catalyst deactivation, and catalyst regeneration is also an important research topic. Density functional theory (DFT), in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and kinetics are the most widely used methods to conduct mechanism study. The studies on "low temperature," "atomic-scale insight," "elemental mercury," "situ DIRFTS investigation," "arsenic poisoning," "SPOA-34," "Cu-CHA catalyst," "TiO2 catalyst," and "Ce catalyst" have been the hotspots in recent years.
Collapse
Affiliation(s)
- Weikun Ai
- School of Ecology and Environment, Zhengzhou University, No. 100 Science Avenue, High-tech District, Zhengzhou, 450001, People's Republic of China
| | - Jiabin Wang
- School of Ecology and Environment, Zhengzhou University, No. 100 Science Avenue, High-tech District, Zhengzhou, 450001, People's Republic of China
| | - Junhui Wen
- School of Ecology and Environment, Zhengzhou University, No. 100 Science Avenue, High-tech District, Zhengzhou, 450001, People's Republic of China
| | - Shuai Wang
- School of Ecology and Environment, Zhengzhou University, No. 100 Science Avenue, High-tech District, Zhengzhou, 450001, People's Republic of China
| | - Wanting Tan
- School of Ecology and Environment, Zhengzhou University, No. 100 Science Avenue, High-tech District, Zhengzhou, 450001, People's Republic of China
| | - Zhenzong Zhang
- College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, People's Republic of China
| | - Ke Liang
- School of Ecology and Environment, Zhengzhou University, No. 100 Science Avenue, High-tech District, Zhengzhou, 450001, People's Republic of China
| | - Ruiqin Zhang
- School of Ecology and Environment, Zhengzhou University, No. 100 Science Avenue, High-tech District, Zhengzhou, 450001, People's Republic of China
- Henan Key Laboratory of Environmental Chemistry and Low Carbon Technology, Zhengzhou, 450001, People's Republic of China
| | - Wenjie Li
- School of Ecology and Environment, Zhengzhou University, No. 100 Science Avenue, High-tech District, Zhengzhou, 450001, People's Republic of China.
- Henan Key Laboratory of Environmental Chemistry and Low Carbon Technology, Zhengzhou, 450001, People's Republic of China.
| |
Collapse
|
5
|
Wang X, Pei C, Zhao ZJ, Chen S, Li X, Sun J, Song H, Sun G, Wang W, Chang X, Zhang X, Gong J. Coupling acid catalysis and selective oxidation over MoO 3-Fe 2O 3 for chemical looping oxidative dehydrogenation of propane. Nat Commun 2023; 14:2039. [PMID: 37041149 PMCID: PMC10090184 DOI: 10.1038/s41467-023-37818-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 03/31/2023] [Indexed: 04/13/2023] Open
Abstract
Redox catalysts play a vital role in chemical looping oxidative dehydrogenation processes, which have recently been considered to be a promising prospect for propylene production. This work describes the coupling of surface acid catalysis and selective oxidation from lattice oxygen over MoO3-Fe2O3 redox catalysts for promoted propylene production. Atomically dispersed Mo species over γ-Fe2O3 introduce effective acid sites for the promotion of propane conversion. In addition, Mo could also regulate the lattice oxygen activity, which makes the oxygen species from the reduction of γ-Fe2O3 to Fe3O4 contribute to selectively oxidative dehydrogenation instead of over-oxidation in pristine γ-Fe2O3. The enhanced surface acidity, coupled with proper lattice oxygen activity, leads to a higher surface reaction rate and moderate oxygen diffusion rate. Consequently, this coupling strategy achieves a robust performance with 49% of propane conversion and 90% of propylene selectivity for at least 300 redox cycles and ultimately demonstrates a potential design strategy for more advanced redox catalysts.
Collapse
Affiliation(s)
- Xianhui Wang
- School of Chemical Engineering & Technology, Key Laboratory for Green Chemical Technology of Ministry of Education, Tianjin University, 300072, Tianjin, China
- Collaborative Innovation Center for Chemical Science & Engineering (Tianjin), 300072, Tianjin, China
- Haihe Laboratory of Sustainable Chemical Transformations, 300192, Tianjin, China
| | - Chunlei Pei
- School of Chemical Engineering & Technology, Key Laboratory for Green Chemical Technology of Ministry of Education, Tianjin University, 300072, Tianjin, China
- Collaborative Innovation Center for Chemical Science & Engineering (Tianjin), 300072, Tianjin, China
- Haihe Laboratory of Sustainable Chemical Transformations, 300192, Tianjin, China
| | - Zhi-Jian Zhao
- School of Chemical Engineering & Technology, Key Laboratory for Green Chemical Technology of Ministry of Education, Tianjin University, 300072, Tianjin, China
- Collaborative Innovation Center for Chemical Science & Engineering (Tianjin), 300072, Tianjin, China
- Haihe Laboratory of Sustainable Chemical Transformations, 300192, Tianjin, China
| | - Sai Chen
- School of Chemical Engineering & Technology, Key Laboratory for Green Chemical Technology of Ministry of Education, Tianjin University, 300072, Tianjin, China
- Collaborative Innovation Center for Chemical Science & Engineering (Tianjin), 300072, Tianjin, China
- Haihe Laboratory of Sustainable Chemical Transformations, 300192, Tianjin, China
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, 350207, Binhai New City, Fuzhou, China
| | - Xinyu Li
- School of Chemical Engineering & Technology, Key Laboratory for Green Chemical Technology of Ministry of Education, Tianjin University, 300072, Tianjin, China
- Collaborative Innovation Center for Chemical Science & Engineering (Tianjin), 300072, Tianjin, China
- Haihe Laboratory of Sustainable Chemical Transformations, 300192, Tianjin, China
| | - Jiachen Sun
- School of Chemical Engineering & Technology, Key Laboratory for Green Chemical Technology of Ministry of Education, Tianjin University, 300072, Tianjin, China
- Collaborative Innovation Center for Chemical Science & Engineering (Tianjin), 300072, Tianjin, China
- Haihe Laboratory of Sustainable Chemical Transformations, 300192, Tianjin, China
| | - Hongbo Song
- School of Chemical Engineering & Technology, Key Laboratory for Green Chemical Technology of Ministry of Education, Tianjin University, 300072, Tianjin, China
- Collaborative Innovation Center for Chemical Science & Engineering (Tianjin), 300072, Tianjin, China
- Haihe Laboratory of Sustainable Chemical Transformations, 300192, Tianjin, China
| | - Guodong Sun
- School of Chemical Engineering & Technology, Key Laboratory for Green Chemical Technology of Ministry of Education, Tianjin University, 300072, Tianjin, China
- Collaborative Innovation Center for Chemical Science & Engineering (Tianjin), 300072, Tianjin, China
- Haihe Laboratory of Sustainable Chemical Transformations, 300192, Tianjin, China
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, 350207, Binhai New City, Fuzhou, China
| | - Wei Wang
- School of Chemical Engineering & Technology, Key Laboratory for Green Chemical Technology of Ministry of Education, Tianjin University, 300072, Tianjin, China
- Collaborative Innovation Center for Chemical Science & Engineering (Tianjin), 300072, Tianjin, China
- Haihe Laboratory of Sustainable Chemical Transformations, 300192, Tianjin, China
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, 350207, Binhai New City, Fuzhou, China
| | - Xin Chang
- School of Chemical Engineering & Technology, Key Laboratory for Green Chemical Technology of Ministry of Education, Tianjin University, 300072, Tianjin, China
- Collaborative Innovation Center for Chemical Science & Engineering (Tianjin), 300072, Tianjin, China
- Haihe Laboratory of Sustainable Chemical Transformations, 300192, Tianjin, China
| | - Xianhua Zhang
- School of Chemical Engineering & Technology, Key Laboratory for Green Chemical Technology of Ministry of Education, Tianjin University, 300072, Tianjin, China
- Collaborative Innovation Center for Chemical Science & Engineering (Tianjin), 300072, Tianjin, China
- Haihe Laboratory of Sustainable Chemical Transformations, 300192, Tianjin, China
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, 350207, Binhai New City, Fuzhou, China
| | - Jinlong Gong
- School of Chemical Engineering & Technology, Key Laboratory for Green Chemical Technology of Ministry of Education, Tianjin University, 300072, Tianjin, China.
- Collaborative Innovation Center for Chemical Science & Engineering (Tianjin), 300072, Tianjin, China.
- Haihe Laboratory of Sustainable Chemical Transformations, 300192, Tianjin, China.
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, 350207, Binhai New City, Fuzhou, China.
| |
Collapse
|
6
|
Zhang X, Jin S, Liu S, Chen Y, Fang C, Wang K, Wang X, Wu X, Wang J. Low-Temperature NH 3-SCR over Hierarchical MnO x Supported on Montmorillonite Prepared by Different Methods. ACS OMEGA 2023; 8:13384-13395. [PMID: 37065025 PMCID: PMC10099437 DOI: 10.1021/acsomega.3c00718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 03/21/2023] [Indexed: 06/19/2023]
Abstract
Hierarchical MnO x pillared or supported on montmorillonite were prepared by three methods, i.e., impregnation (IM), chemical precipitation (CP), and in situ deposition (SP). The catalysts were characterized by low-temperature N2 adsorption (BET), XRD, XPS, SEM, TEM, H2-TPR, NH3-TPD, NO-TPD, TPSR, in situ DRIFTS, and evaluation of catalytic performance for NH3-SCR. The best catalytic performance was obtained for catalysts prepared by SP in terms of activity and selectivity, obtaining >90% NO conversion with >95% selectivity to N2 in 100-300 °C and GHSV of 70,000 h-1. Compared to IM and CP, SP greatly simplified catalyst preparation, resulting in higher BET surface areas; a spongy pore structure; more highly dispersed, pillared MnO x species; and higher density of acid sites distributed on catalysts surface, which all contributed to its superior performance for NH3-SCR. The activity for low-temperature NH3-SCR of manganese catalysts could be widely tailored by preparation methods.
Collapse
Affiliation(s)
- Xianlong Zhang
- School
of Chemistry and Chemical Engineering, Hefei
University of Technology, Hefei 230009, China
- Anhui
Province Key Laboratory of Advanced Catalytic Materials and Reaction
Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, China
| | - Shi Jin
- School
of Chemistry and Chemical Engineering, Hefei
University of Technology, Hefei 230009, China
| | - Shiwen Liu
- School
of Chemistry and Chemical Engineering, Hefei
University of Technology, Hefei 230009, China
| | - Yazhong Chen
- School
of Chemistry and Chemical Engineering, Hefei
University of Technology, Hefei 230009, China
| | - Cheng Fang
- School
of Chemistry and Chemical Engineering, Hefei
University of Technology, Hefei 230009, China
| | - Kui Wang
- School
of Chemistry and Chemical Engineering, Hefei
University of Technology, Hefei 230009, China
| | - Xinyu Wang
- School
of Chemistry and Chemical Engineering, Hefei
University of Technology, Hefei 230009, China
| | - Xueping Wu
- School
of Chemistry and Chemical Engineering, Hefei
University of Technology, Hefei 230009, China
- Anhui
Province Key Laboratory of Advanced Catalytic Materials and Reaction
Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, China
- Engineering
Research Center of Advanced Composite Materials Design & Application
of Anhui Province, Hefei 230009, China
| | - Junwei Wang
- College
of Chemistry and Chemical Engineering, Anqing
Normal University, Anqing 246011, China
| |
Collapse
|
7
|
Du Y, Wu X, Liu L, Li X, Liu L, Wu X. Low‐Temperature NH
3
Selective Catalytic Reduction Performance Enhancement of Fe‐Based Oxides by Employing Carbon Nanotubes to Decorate the MgFe‐LDH. ChemistrySelect 2023. [DOI: 10.1002/slct.202203767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Affiliation(s)
- Yali Du
- College of Chemistry and Chemical Engineering Jinzhong University Jinzhong 030619 China
| | - Xianfeng Wu
- College of Chemistry and Chemical Engineering Taiyuan University of Technology Taiyuan 030024 China (Xu Wu
| | - Lili Liu
- College of Chemistry and Chemical Engineering Taiyuan University of Technology Taiyuan 030024 China (Xu Wu
| | - Xiaodong Li
- College of Chemistry and Chemical Engineering Jinzhong University Jinzhong 030619 China
| | - Lifei Liu
- College of Chemistry and Chemical Engineering Taiyuan University of Technology Taiyuan 030024 China (Xu Wu
| | - Xu Wu
- College of Chemistry and Chemical Engineering Taiyuan University of Technology Taiyuan 030024 China (Xu Wu
- Shanxi Huadun Industrial Co. Ltd Taiyuan 030062 China
| |
Collapse
|
8
|
Ma Y, Lai J, Wu J, Zhang H, Yan J, Li X, Lin X. Efficient synergistic catalysis of chlorinated aromatic hydrocarbons and NO x over novel low-temperature catalysts: Nano-TiO 2 modification and interaction mechanism. CHEMOSPHERE 2023; 315:137640. [PMID: 36584823 DOI: 10.1016/j.chemosphere.2022.137640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 12/12/2022] [Accepted: 12/21/2022] [Indexed: 06/17/2023]
Abstract
For efficient and synergistic elimination of chlorinated aromatic hydrocarbons (e.g., dioxins and chlorobenzenes) and NOx at low temperatures, a novel VOx-CeOx-WOx/TiO2 catalyst was systemically studied, involving the nano-TiO2 modification and the interaction mechanism between 1,2-dichlorobenzen (1,2-DCB) catalytic oxidation (DCBCO) and NH3-SCR. The VOx-CeOx-WOx/TiO2 performed excellent oxygen storage/release capacity (OSRC) and desirable 1,2-DCB conversion efficiency (95.1-97.4%) at 160-200 ℃ via M‒K and L‒H mechanism. The nano-TiO2 modification slightly impaired the 1,2-DCB oxidation to 93.6-96.2% owing to the reduced surface area and Brønsted acidity, while it distinctly enhanced NO conversion and lowered the T50 (from 162 to 112 ℃) and T90 (from 232 to 205 ℃) by improving catalyst reducibility. Based on further synergistic catalysis evaluation and in-situ DRIFT analysis, NO enhanced the 1,2-DCB conversion and complete oxidation capacity of VOx-CeOx-WOx/TiO2 by promoting active oxygen (O2-, O-, O2-) generation and improving 1,2-DCB chemosorption and subsequent oxidation. In detail, the produced HCl and H2O improved the catalyst acidity and promoted the formation of HONO and HNO3. Moreover, their generation not only facilitated the chemisorption of NH3 but also participated in the NH3-SCR via L‒H mechanism. The ensuing problem was the competitive chemisorption among 1,2-DCB, NH3, and their subsequent intermediates. As a result, NH3 had distinct advantages in competing for acid sites and active oxygen species, especially at the higher temperature, resulting in the improved NO conversion with elevated reaction temperature but the reduced 1,2-DCB conversion. The results provided essential basics for developing new catalysts to synergistically control the emission of chloroaromatic organics and NOx at low temperature.
Collapse
Affiliation(s)
- Yunfeng Ma
- State Key Laboratory for Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Jianwen Lai
- State Key Laboratory for Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Jiayao Wu
- State Key Laboratory for Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Hao Zhang
- State Key Laboratory for Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Jianhua Yan
- State Key Laboratory for Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Xiaodong Li
- State Key Laboratory for Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Xiaoqing Lin
- State Key Laboratory for Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou, 310027, China.
| |
Collapse
|
9
|
Wu YW, Zhou XY, Zhou JL, Hu Z, Cai Q, Lu Q. A comprehensive review of the heavy metal issues regarding commercial vanadium‑titanium-based SCR catalyst. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 857:159712. [PMID: 36302402 DOI: 10.1016/j.scitotenv.2022.159712] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 10/01/2022] [Accepted: 10/21/2022] [Indexed: 06/16/2023]
Abstract
Facing the increasing demand of atmosphere pollutant control, selective catalytic reduction (SCR) technology has been widely applied in various industries for NOx abatement. However, in the condition of complicated flue gas components, the heavy metal issue is a great challenge to the catalyst deactivation and atmospheric pollution control. In this review, with the comprehensive consideration of SCR catalysts in heavy metal-rich flue gas scenarios, the distribution character of heavy metals in SCR system is firstly summarized, then the detailed interaction mechanism between heavy metals and the vanadium‑titanium-based catalyst is discussed. Focusing on the mercury oxidation as well as against arsenic/lead poisoning, certain modification strategies are also concluded to develop novel SCR catalysts with multiple functions. Furthermore, the state-of-the-art technologies regarding the regeneration, the valuable metal recovery, and the harmless treatment of the spent SCR catalyst are also reported. This paper provides theoretical guidance for the manufacture of novel SCR catalysts under multiple scenarios, as well as the synergistic control of NOx and heavy metals.
Collapse
Affiliation(s)
- Yang-Wen Wu
- National Engineering Research Center of New Energy Power Generation, North China Electric Power University, Beijing 102206, China
| | - Xin-Yue Zhou
- National Engineering Research Center of New Energy Power Generation, North China Electric Power University, Beijing 102206, China
| | - Jia-le Zhou
- National Engineering Research Center of New Energy Power Generation, North China Electric Power University, Beijing 102206, China
| | - Zhuang Hu
- National Engineering Research Center of New Energy Power Generation, North China Electric Power University, Beijing 102206, China
| | - Qi Cai
- National Engineering Research Center of New Energy Power Generation, North China Electric Power University, Beijing 102206, China
| | - Qiang Lu
- National Engineering Research Center of New Energy Power Generation, North China Electric Power University, Beijing 102206, China.
| |
Collapse
|
10
|
Liu Y, Liu J, Zhu B, Chen J, Li F, Sun Y. Insight into the micro-mechanism of Co doping to improve the deNOx performance and H2O resistance of β-MnO2 catalysts. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2023.130983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
|
11
|
Wang S, Zhao Y, Ma J, Bai C, Zhang H, Ren Y. Phosphomolybdic acid-modified polyaniline nanowires with abundant acidic sites for efficient photocatalytic reduction of nitrate to nitrogen in water. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
|
12
|
NO Reduction Reaction by Kiwi Biochar-Modified MnO2 Denitrification Catalyst: Redox Cycle and Reaction Process. Catalysts 2022. [DOI: 10.3390/catal12080870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
NO is a major environmental pollutant. MnO2 is often used as a denitrification catalyst with poor N2 selectivity and weak SO2 resistance. Kiwi twig biochar was chosen to modify MnO2 samples by using the hydrothermal method. The NO conversion rates of the biochar-modified samples were >90% at 125–225 °C. Kiwi twig biochar made the C2MnO2 sample with a larger specific surface area, a higher number of acidic sites and Oβ/Oα molar ratio, leading to more favorable activity at high temperatures and better SO2 resistance. Moreover, the inhibition of the NH3 oxidation reaction and the Mn3+ → Mn4+ process played a crucial role in the redox cycle. What was more, Brønsted acidic sites present on the C1MnO2 sample participate in the reaction more rapidly. This study identified the role of biochar in the reaction process and provides a reference for the wide application of biochar.
Collapse
|
13
|
Zhang Y, Zhang K, Yang C, Yang M, Peng G, Xie Y, Wen J, Xia F, Jia L, Zhang Q. The promoting mechanism of SO42− on CeO2 for selective catalytic reduction of NO by NH3: A DFT study. Theor Chem Acc 2022. [DOI: 10.1007/s00214-022-02898-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
14
|
Xu S, Yin L, Wang H, Gao L, Tian X, Chen J, Zhang Q, Ning P. Improved Alkali-Tolerance of FeOx-WO3 Catalyst for NO Removal via in situ Reserving FeOx Active Species. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121824] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
15
|
Jia Y, Zheng R, Jiang J, Yuan J, Guo L, Wang R, Gu M, Zhao R, Zhang S. Excellently Remove NOx Over V-Modified Heteropolyacid Catalyst (V-HPMo/TiO2): Activity, Characterization and Mechanism. Catal Letters 2022. [DOI: 10.1007/s10562-022-04061-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
16
|
Zhang Y, Han B, Chen Y, Xia K, Gao Q, Zhou C. Understanding the mechanism of selective catalytic reduction on spinel TiMn2O4(001) surface. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2021.112070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
17
|
Gao R, Ma X, Liu L, Gao S, Zhang X, Xu Y, Cheng X, Zhao H, Huo L. In-situ deposition of POMA/ZnO nanorods array film by vapor phase polymerization for detection of trace ammonia in human exhaled breath at room temperature. Anal Chim Acta 2022; 1199:339563. [DOI: 10.1016/j.aca.2022.339563] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 01/27/2022] [Accepted: 01/28/2022] [Indexed: 11/15/2022]
|
18
|
Wu YW, Zhou XY, Cai Q, Hu Z, Mi TG, Zhang B, Zhao L, Lu Q. Intrinsic mechanism insight of the interaction between lead species and the Vanadium-based catalysts based on First-principles investigation. J Colloid Interface Sci 2021; 607:1362-1372. [PMID: 34583041 DOI: 10.1016/j.jcis.2021.09.081] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 08/17/2021] [Accepted: 09/15/2021] [Indexed: 12/21/2022]
Abstract
Lead (Pb) species trigger serious poisoning of selective catalytic reduction (SCR) catalysts. To improve the Pb resistance ability, revealing the impact mechanism of Pb species on the commercial SCR catalysts from a molecular level is of great significance. Herein, first-principles calculations were applied to unveil the Pb adsorption mechanism on the vanadium-based catalysts, the results were also compared with the previous experimental findings. The intrinsic interaction mechanism between Pb and catalyst components was interpreted by clarifying the change of the catalyst electronic structures (including charge transfer, bond formation situations, and active sites reactivities). It is found that the adsorption of Pb species belongs to chemisorption, evident electron transfer with the catalyst surface is inspected and intense charge transfer indicates strong adsorption. A remarkable interaction with the V = O active sites occurs and stable Pb-O bonds are formed, which significantly changes the electronic structures of the V = O sites and inhibits the NH3 adsorption, thus suppressing the SCR activity. Finally, thermodynamic analysis was applied to elucidate the temperature influence on Pb adsorption. It is found that Pb adsorption on catalysts cannot proceed spontaneously over 500 K. At higher temperatures the adsorption is inhibited and the Pb species become less stable, which partially explains why the Pb-poisoning effect at high temperatures is relatively moderate than that at low temperatures.
Collapse
Affiliation(s)
- Yang-Wen Wu
- National Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, Beijing 102206, China
| | - Xin-Yue Zhou
- National Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, Beijing 102206, China
| | - Qi Cai
- National Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, Beijing 102206, China
| | - Zhuang Hu
- National Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, Beijing 102206, China
| | - Teng-Ge Mi
- National Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, Beijing 102206, China
| | - Bing Zhang
- National Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, Beijing 102206, China
| | - Li Zhao
- National Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, Beijing 102206, China
| | - Qiang Lu
- National Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, Beijing 102206, China.
| |
Collapse
|