1
|
Yan L, Zhu H, Liu X, Peng D, Zhang J, Cheng D, Chen A, Zhang D. Synergistic Catalytic Removal of NO x and n-Butylamine via Spatially Separated Cooperative Sites. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:11781-11790. [PMID: 38877971 DOI: 10.1021/acs.est.4c01840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/03/2024]
Abstract
Synergistic control of nitrogen oxides (NOx) and nitrogen-containing volatile organic compounds (NVOCs) from industrial furnaces is necessary. Generally, the elimination of n-butylamine (n-B), a typical pollutant of NVOCs, requires a catalyst with sufficient redox ability. This process induces the production of nitrogen-containing byproducts (NO, NO2, N2O), leading to lower N2 selectivity of NH3 selective catalytic reduction of NOx (NH3-SCR). Here, synergistic catalytic removal of NOx and n-B via spatially separated cooperative sites was originally demonstrated. Specifically, titania nanotubes supported CuOx-CeO2 (CuCe-TiO2 NTs) catalysts with spatially separated cooperative sites were creatively developed, which showed a broader active temperature window from 180 to 340 °C, with over 90% NOx conversion, 85% n-B conversion, and 90% N2 selectivity. A synergistic effect of the Cu and Ce sites was found. The catalytic oxidation of n-B mainly occurred at the Cu sites inside the tube, which ensured the regular occurrence of the NH3-SCR reaction on the outer Ce sites under the matching temperature window. In addition, the n-B oxidation would produce abundant intermediate NH2*, which could act as an extra reductant to promote NH3-SCR. Meanwhile, NH3-SCR could simultaneously remove the possible NOx byproducts of n-B decomposition. This novel strategy of constructing cooperative sites provides a distinct pathway for promoting the synergistic removal of n-B and NOx.
Collapse
Affiliation(s)
- Lijun Yan
- School of Environmental and Chemical Engineering, State Key Laboratory of Advanced Special Steel, International Joint Laboratory of Catalytic Chemistry, Innovation Institute of Carbon Neutrality, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Huifang Zhu
- School of Environmental and Chemical Engineering, State Key Laboratory of Advanced Special Steel, International Joint Laboratory of Catalytic Chemistry, Innovation Institute of Carbon Neutrality, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Xiangyu Liu
- School of Environmental and Chemical Engineering, State Key Laboratory of Advanced Special Steel, International Joint Laboratory of Catalytic Chemistry, Innovation Institute of Carbon Neutrality, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Dengchao Peng
- School of Environmental and Chemical Engineering, State Key Laboratory of Advanced Special Steel, International Joint Laboratory of Catalytic Chemistry, Innovation Institute of Carbon Neutrality, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Jin Zhang
- School of Environmental and Chemical Engineering, State Key Laboratory of Advanced Special Steel, International Joint Laboratory of Catalytic Chemistry, Innovation Institute of Carbon Neutrality, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Danhong Cheng
- School of Environmental and Chemical Engineering, State Key Laboratory of Advanced Special Steel, International Joint Laboratory of Catalytic Chemistry, Innovation Institute of Carbon Neutrality, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Aling Chen
- School of Environmental and Chemical Engineering, State Key Laboratory of Advanced Special Steel, International Joint Laboratory of Catalytic Chemistry, Innovation Institute of Carbon Neutrality, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Dengsong Zhang
- School of Environmental and Chemical Engineering, State Key Laboratory of Advanced Special Steel, International Joint Laboratory of Catalytic Chemistry, Innovation Institute of Carbon Neutrality, College of Sciences, Shanghai University, Shanghai 200444, China
| |
Collapse
|
2
|
Lin B, Guo Z, Tang J, Chen P, Ye D, Hu Y. Modulating the Microstructure and Surface Acidity of MnO 2 by Doping-Induced Phase Transition for Simultaneous Removal of Toluene and NO x at Low Temperature. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:10398-10408. [PMID: 38803193 DOI: 10.1021/acs.est.4c03162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
It is a great challenge to remove VOCs and NOx simultaneously from flue gas in nonelectric industries. This study focuses on the construction of Fe-MnO2 catalysts that perform well in the simultaneous removal of toluene and NOx at low temperatures. Utilizing the Fe-induced phase transition of MnO2, Fe-MnO2-F&R catalysts with a composite morphology of nanoflowers and nanorods were successfully prepared that provided an abundant microporous structure to facilitate the diffusion of molecules of different sizes. Through in-depth investigation of the active sites and reaction mechanism, we discovered that Fe-induced phase transition could modulate the surface acidity of Fe-MnO2-F&R. The higher concentration of surface Mn4+ provided numerous Brønsted acid sites, which effectively promoted the activation of toluene to reactive intermediates, such as benzyl alcohol/benzoate/maleic acid. Simultaneously, Fe provided a large number of Lewis acid sites that anchor and activate NH3 species, thereby inhibiting NH3 nonselective oxidation. Furthermore, additional Brønsted acid sites were generated during the simultaneous reaction process, enhancing toluene activation. Consequently, the simultaneous removal of toluene and NOx was achieved through regulation of the physical structure and the concentration of acidic sites. The present work provides new insights into the rational design of bifunctional catalysts for the synergistic control of VOCs and NOx emissions.
Collapse
Affiliation(s)
- Beilong Lin
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, P. R. China
| | - Ziyang Guo
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, P. R. China
| | - Jiali Tang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, P. R. China
| | - Peirong Chen
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, P. R. China
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, P. R. China
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, P. R. China
| | - Daiqi Ye
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, P. R. China
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, P. R. China
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, P. R. China
| | - Yun Hu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, P. R. China
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, P. R. China
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, P. R. China
| |
Collapse
|
3
|
Chen X, Li C, Jiang M, Zhang J, Qian G. Enhanced Replenishment of Active Lattice Oxygen Using Chiral Copper Oxide. ACS APPLIED MATERIALS & INTERFACES 2024; 16:28517-28525. [PMID: 38769473 DOI: 10.1021/acsami.4c03699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
Effective catalytic performance of the transition metal oxide is attributed to high specific surface areas, abundant surface oxygen atoms, and balanced valence ratios. Although the chirality of the transition metal has attracted attention, most studies have focused on optical application. A few chiral transition metal oxides were used as electrocatalysts and photocatalysts. The influence of the chiral catalysts on the thermal catalysis process has been less explored. In this study, Mn-loaded chiral (M/l-CuO and M/d-CuO) and achiral CuO (M/a-CuO) were synthesized and compared in the catalytic oxidization of toluene. Spectrally analyzed Mn was well-dispersed on both chiral and achiral CuO. l-CuO and d-CuO showed nanoflower-like chirality. The angles between each (001) plane of CuO were the source of chirality. The toluene turnover frequency (TOF) of the samples was in the order of Mn/d-CuO (5.6 × 10-5 s-1) > Mn/l-CuO (4.4 × 10-5 s-1) > Mn/a-CuO (3.2 × 10-5 s-1) at 240 °C, consistent with the order of the oxygen replenishment rate. The as-prepared catalysts had similar ratios of lattice oxygen/surface adsorbed oxygen, Mn3+/Mn4+, and Cu+/Cu2+. A higher TOF was attributed to chirality, which increased the lattice oxygen replenishment speed from the gaseous phase to the solid surface. Our study indicates gas-solid catalysis from a structure-activity viewpoint.
Collapse
Affiliation(s)
- Xinru Chen
- SHU Center of Green Urban Mining & Industry Ecology, School of Environmental and Chemical Engineering, Shanghai University, No. 381 Nanchen Road, Shanghai 200444, P. R. China
| | - Chengyan Li
- SHU Center of Green Urban Mining & Industry Ecology, School of Environmental and Chemical Engineering, Shanghai University, No. 381 Nanchen Road, Shanghai 200444, P. R. China
| | - Meijia Jiang
- SHU Center of Green Urban Mining & Industry Ecology, School of Environmental and Chemical Engineering, Shanghai University, No. 381 Nanchen Road, Shanghai 200444, P. R. China
| | - Jia Zhang
- SHU Center of Green Urban Mining & Industry Ecology, School of Environmental and Chemical Engineering, Shanghai University, No. 381 Nanchen Road, Shanghai 200444, P. R. China
| | - Guangren Qian
- MGI of Shanghai University, Xiapu Town, Xiangdong District, Pingxiang City, Jiangxi 337022, P. R. China
| |
Collapse
|
4
|
Qi ZF, Wang S, Guo XL. Research on plasma modified fly ash denitration. Sci Rep 2024; 14:4390. [PMID: 38388827 PMCID: PMC10883978 DOI: 10.1038/s41598-024-54948-3] [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: 11/14/2023] [Accepted: 02/19/2024] [Indexed: 02/24/2024] Open
Abstract
The effects of reactor parameters and process parameters on the denitration rate of modified fly ash in different gas atmospheres were studied by using a dielectric barrier plasma reactor and using orthogonal experiments. The characteristics of modified fly ash were analyzed using scanning electron microscope, specific surface area analyzer, X-ray diffraction, Boehm titration and Fourier transform infrared spectroscopy. The experimental data were processed by variance analysis and linear regression to induce the denitration mechanism. R2 of the linear regression analysis model is 0.789, which means that the adsorption pore size, acid groups and basic group can explain 78.9% of the change in denitration rate. The basic group will have a significant positive impact on the denitration rate, and the adsorption pore size and acidic group will have a significant negative impact on the denitration rate. Through variance analysis of the experimental data, it was found that the input power and discharge gap have a significant effect on the denitration rate, but the ionization time and discharge length have no significant effect. The input power affects the denitration rate by impacting the basic group, and the discharge gap affects the denitration rate by influencing the adsorption pore size. There are three denitration mechanisms on the surface of fly ash: physical adsorption, chemical adsorption and absorption process. Among them, chemical adsorption is the main mechanism of action, accounting for approximately 60.86%.
Collapse
Affiliation(s)
- Zhan-Feng Qi
- College of Mechanical Engineering, Dalian University, Dalian, 116622, China
| | - Shuo Wang
- College of Mechanical Engineering, Dalian University, Dalian, 116622, China
| | - Xiu-Li Guo
- College of Mechanical Engineering, Dalian University, Dalian, 116622, China.
| |
Collapse
|
5
|
Adoor P, Hegde SS, Bhat BR, Yethadka SN, Yeenduguli R. Elucidating the Role of Copper-Induced Mixed Phases on the Electrochemical Performance of Mn-Based Thin-Film Electrodes. ACS OMEGA 2023; 8:46640-46652. [PMID: 38107935 PMCID: PMC10719916 DOI: 10.1021/acsomega.3c05614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 10/07/2023] [Accepted: 11/20/2023] [Indexed: 12/19/2023]
Abstract
Manganese oxide is a fascinating material for use as a thin-film electrode in supercapacitors. Herein, the consequences of copper incorporation on spray pyrolyzed manganese oxide thin films and their electrochemical performance were investigated. The Cu-incorporated manganese oxide thin films were deposited by spray pyrolysis, and their structural and electrochemical properties were thoroughly evaluated. The formation of the spinel Mn3O4 phase with effective Cu incorporation was confirmed by X-ray diffraction investigation. Through Raman studies, it was noticed that mixed phases of manganese oxide tend to form after Cu incorporation, and this result was also reflected in X-ray photoelectron spectroscopic studies. The surface morphology and roughness were also altered by the addition of copper. However, electrochemical measurements implied a reduction in the specific capacitance upon copper inclusion. The cyclic voltammetry test indicated a specific capacitance of 132 F/g for Mn3O4 electrodes, but a substantial drop for copper-incorporated samples due to the mixed manganese phase. The decremental tendency was further supported by galvanostatic charge-discharge studies and electrochemical impedance spectroscopic measurements. These results provide valuable insights into the effects of copper addition in manganese oxide thin-film-based electrodes for energy storage applications.
Collapse
Affiliation(s)
- Pramitha Adoor
- Semiconductor
and Photovoltaics Lab, Department of Physics, Manipal Academy of Higher
Education, Manipal Institute of Technology, Manipal 576104, Karnataka, India
| | - Shreeganesh Subraya Hegde
- Catalysis
and Materials Chemistry Laboratory, Department of Chemistry, National Institute of Technology Karnataka, Surathkal, Mangalore 575025, Karnataka, India
| | - Badekai Ramachandra Bhat
- Catalysis
and Materials Chemistry Laboratory, Department of Chemistry, National Institute of Technology Karnataka, Surathkal, Mangalore 575025, Karnataka, India
| | - Sudhakar Narahari Yethadka
- Department
of Chemistry, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
| | - Raviprakash Yeenduguli
- Semiconductor
and Photovoltaics Lab, Department of Physics, Manipal Academy of Higher
Education, Manipal Institute of Technology, Manipal 576104, Karnataka, India
| |
Collapse
|
6
|
Feng C, Wang Y, Chen C, Fu X, Pan Y, Xin H, Wang Z, Lu Y, Li X, Zhang R, Liu Y. Fabrication of highly dispersed Pd-Mn 3O 4 catalyst for efficient catalytic propane total oxidation. J Colloid Interface Sci 2023; 650:1415-1423. [PMID: 37460387 DOI: 10.1016/j.jcis.2023.07.076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 07/04/2023] [Accepted: 07/12/2023] [Indexed: 08/17/2023]
Abstract
Adjusting the interaction between dual active components for enhancing volatile organic compounds (VOCs) degradation is an effective but still challenging means of air pollution control. Herein, a limited pyrolysis oxidation strategy was adopted to prepare Pd-Mn3O4 spinel catalysts with uniform morphology and active component dispersion. Among these, 1.08Pd-Mn3O4 presented the highest catalytic efficiency with a T90 value of 240 °C, which was 94 °C lower than that of Mn3O4. Characterization and density functional theory (DFT) calculation results revealed that the strong metal-support interaction (SMSI) effect between Pd and Mn3O4 promoted the redistribution of surface charges, thus strengthening the oxidation-reduction ability of the active sites. Moreover, the SMSI effect led to a better migration of surface oxygen species, and boosted the generation of active surface oxygen species. Simultaneously, the Pd catalyst further reduced the energy barrier in the initial stage of the dehydrogenation of propane. Overall, this study provided a novel design strategy for dual active components catalysts with SMSI effect and extended the application of these catalysts in the important field of VOCs elimination.
Collapse
Affiliation(s)
- Chao Feng
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao 266580, China; Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China.
| | - Yunxia Wang
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao 266580, China
| | - Chong Chen
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao 266580, China
| | - Xueqing Fu
- Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
| | - Yuan Pan
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao 266580, China.
| | - Hongchuan Xin
- Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
| | - Zhong Wang
- Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
| | - Yukun Lu
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao 266580, China
| | - Xuebing Li
- Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
| | - Runduo Zhang
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Energy Environmental Catalysis, Beijing University of Chemical Technology, Beijing 100029, China
| | - Yunqi Liu
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao 266580, China.
| |
Collapse
|
7
|
Yang X, Liu K, Han X, Xu J, Bian M, Zheng D, Xie H, Zhang Y, Yang X. Transformation of waste battery cathode material LiMn 2O 4 into efficient ultra-low temperature NH 3-SCR catalyst: Proton exchange synergistic vanadium modification. JOURNAL OF HAZARDOUS MATERIALS 2023; 459:132209. [PMID: 37567137 DOI: 10.1016/j.jhazmat.2023.132209] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 07/18/2023] [Accepted: 08/01/2023] [Indexed: 08/13/2023]
Abstract
It is essential to develop the catalyst for NH3-SCR with excellent performance at ultra-low temperature (≤150 °C), and resource recycling is another important part of environmental protection. Based on the principle of environmental friendliness, the LiMn2O4, one of the waste battery cathode materials, was successfully modified into a novel high-value catalyst for ultra-low temperature NH3-SCR through hydrogen ion exchange and two-dimensional vanadic oxide modification. The optimized LiMn2O4-0.5V-10H catalyst performed the best balance of NOx conversion and N2 selectivity, with activity reaching 96 % at 150 °C and N2 selectivity exceeding 70 % at ultra-low temperature. Due to the unique three-dimensional network structural characteristics of LiMn2O4 spinel, hydrogen exchange could exchange Li+ from the lattice and increase surface acidity; and a small amount of two-dimensional vanadic oxide loading could appropriately regulate redox ability and increase acidic sites. The in-situ DRIFTS results still showed that the L-H and E-R mechanisms coexisted during the reaction. Moreover, combining first-principles calculations and in-situ DRIFTS, the dual modification of H and V could enhance the adsorption of NH3 on the surface of LiMn2O4 but weaken the adsorption of NO, and promote the decomposition of nitrites while inhibit the formation of surface nitrate species, which was the core reason for the improvement of N2 selectivity. The modification mode in this work was simple and inexpensive, which provided a new idea for the high-value utilization of waste batteries and the design of NOx purification catalyst at ultra-low temperature.
Collapse
Affiliation(s)
- Xin Yang
- School of Rare Earths, University of Science and Technology of China, Hefei 230026, China; Ganjiang Innovation Academy, Chinese Academy of Sciences, No.1, Science Academy Road, Ganzhou 341000, China
| | - Kaijie Liu
- School of Rare Earths, University of Science and Technology of China, Hefei 230026, China; Ganjiang Innovation Academy, Chinese Academy of Sciences, No.1, Science Academy Road, Ganzhou 341000, China.
| | - Xinyu Han
- School of Rare Earths, University of Science and Technology of China, Hefei 230026, China; Ganjiang Innovation Academy, Chinese Academy of Sciences, No.1, Science Academy Road, Ganzhou 341000, China
| | - Jianheng Xu
- School of Rare Earths, University of Science and Technology of China, Hefei 230026, China; Ganjiang Innovation Academy, Chinese Academy of Sciences, No.1, Science Academy Road, Ganzhou 341000, China
| | - Mengyao Bian
- School of Rare Earths, University of Science and Technology of China, Hefei 230026, China; Ganjiang Innovation Academy, Chinese Academy of Sciences, No.1, Science Academy Road, Ganzhou 341000, China
| | - Daying Zheng
- School of Rare Earths, University of Science and Technology of China, Hefei 230026, China; Ganjiang Innovation Academy, Chinese Academy of Sciences, No.1, Science Academy Road, Ganzhou 341000, China
| | - Haijiao Xie
- Hangzhou Yanqu Information Technology Co., Ltd., No.712, Wen'er West Road, Hangzhou 310003, China
| | - Yibo Zhang
- School of Rare Earths, University of Science and Technology of China, Hefei 230026, China; Ganjiang Innovation Academy, Chinese Academy of Sciences, No.1, Science Academy Road, Ganzhou 341000, China.
| | - Xiangguang Yang
- School of Rare Earths, University of Science and Technology of China, Hefei 230026, China; Ganjiang Innovation Academy, Chinese Academy of Sciences, No.1, Science Academy Road, Ganzhou 341000, China
| |
Collapse
|
8
|
Chen Y, Chen R, Chang X, Yan J, Gu Y, Xi S, Sun P, Dong X. Degradation of Sodium Acetate by Catalytic Ozonation Coupled with a Mn-Functionalized Fly Ash: Reaction Parameters and Mechanism. TOXICS 2023; 11:700. [PMID: 37624205 PMCID: PMC10457793 DOI: 10.3390/toxics11080700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 08/04/2023] [Accepted: 08/09/2023] [Indexed: 08/26/2023]
Abstract
Supported ozone catalysts usually take alumina, activated carbon, mesoporous molecular sieve, graphene, etc. as the carrier for loading metal oxide via the impregnation method, sol-gel method and precipitation method. In this work, a Mn-modified fly ash catalyst was synthesized to reduce the consumption and high unit price of traditional catalyst carriers like alumina. As a solid waste discharged from coal-fired power plants fueled by coal, fly ash also has porous spherical fine particles with constant surface area and activity, abd is expected to be applied as the main component in the synthesis of ozone catalyst. After the pretreatment process and modification with MnOx, the obtained Mn-modified fly ash exhibited stronger specific surface area and porosity combined with considerable ozone catalytic performance. We used sodium acetate as the contaminant probe, which is difficult to directly decompose with ozone as the end product of ozone oxidation, to evaluate the performance of this Mn-modified fly. It was found that ozone molecules can be transformed to generate ·OH, ·O2- and 1O2 for the further oxidation of sodium acetate. The oxygen vacancy produced via Mn modification plays a crucial role in the adsorption and excitation of ozone. This work demonstrates that fly ash, as an industrial waste, can be synthesized as a potential industrial catalyst with stable physical and chemical properties, a simple preparation method and low costs.
Collapse
Affiliation(s)
- Yaoji Chen
- Zhejiang Tiandi Environmental Protection Technology Co., Ltd., 2159-1 Yuhangtang Road, Hangzhou 311199, China; (Y.C.)
| | - Ruifu Chen
- Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, School of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, 928 Second Avenue, Xiasha Higher Education Zone, Hangzhou 310018, China
| | - Xinglan Chang
- Zhejiang Tiandi Environmental Protection Technology Co., Ltd., 2159-1 Yuhangtang Road, Hangzhou 311199, China; (Y.C.)
| | - Jingying Yan
- Zhejiang Tiandi Environmental Protection Technology Co., Ltd., 2159-1 Yuhangtang Road, Hangzhou 311199, China; (Y.C.)
| | - Yajie Gu
- Zhejiang Tiandi Environmental Protection Technology Co., Ltd., 2159-1 Yuhangtang Road, Hangzhou 311199, China; (Y.C.)
| | - Shuang Xi
- Zhejiang Tiandi Environmental Protection Technology Co., Ltd., 2159-1 Yuhangtang Road, Hangzhou 311199, China; (Y.C.)
| | - Pengfei Sun
- Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, School of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, 928 Second Avenue, Xiasha Higher Education Zone, Hangzhou 310018, China
| | - Xiaoping Dong
- Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, School of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, 928 Second Avenue, Xiasha Higher Education Zone, Hangzhou 310018, China
| |
Collapse
|
9
|
Wang X, Guo N, Peng J, Wang Y, Li H, Ren D, Gui K. Excellent operating temperature window and H 2O/SO 2 resistances of Fe-Ce catalyst modified by different sulfation strategies for NH 3-SCR reaction. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:50635-50648. [PMID: 36797387 DOI: 10.1007/s11356-023-25912-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 02/09/2023] [Indexed: 04/16/2023]
Abstract
Expecting to gain an excellent operating temperature window and superior catalytic activity of the catalyst in SCR reaction, the Fe-Ce bimetallic oxide catalyst was firstly prepared and sulfated with two different sulfation strategies by H2SO4. It is interestingly found that both the two sulfation strategies can significantly broaden the operating temperature window of the catalyst. In particular, the SFC and FCS both exhibit superior resistance to H2O + SO2, and the NOx conversion of the SFC even displays no changes in the coexistence of H2O and SO2. The characterization results show that different sulfation strategies can generate amorphous sulfate species rather than bulk sulfate species. Furthermore, more surface-adsorbed oxygen as well as higher contents of Ce3+ and Fe3+ can be obtained on the sulfated catalysts, especially for the SFC catalyst. Meanwhile, different sulfation strategies will progressively enhance the redox ability and amounts of strong acid sites, which will contribute to broadening the operating temperature window for the NH3-SCR reaction. Additionally, different sulfation methods do not change the reaction pathway of catalysts. However, the adsorption of ad-NH3 species and reactivity of ad-NOx species are significantly changed. These lead to the reaction pathway shifts to E-R direct over the SFC and the promotion of E-R and L-H mechanisms over the FCS catalyst.
Collapse
Affiliation(s)
- Xiaobo Wang
- School of Environmental Science, Nanjing Xiaozhuang University, Nanjing, 211171, Jiangsu, China.
- College of Chemistry and Materials Science, The Key Laboratory of Electrochemical Clean Energy of Anhui Higher Education Institutes, Anhui Provincial Engineering Laboratory for New-Energy Vehicle Battery Energy-Storage Materials, Anhui Normal University, Wuhu, 241002, Anhui, China.
| | - Ning Guo
- School of Environmental Science, Nanjing Xiaozhuang University, Nanjing, 211171, Jiangsu, China
| | - Jiaqi Peng
- School of Environmental Science, Nanjing Xiaozhuang University, Nanjing, 211171, Jiangsu, China
| | - Yue Wang
- School of Environmental Science, Nanjing Xiaozhuang University, Nanjing, 211171, Jiangsu, China
| | - Haijie Li
- School of Environmental Science, Nanjing Xiaozhuang University, Nanjing, 211171, Jiangsu, China
| | - Dongdong Ren
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266520, Shandong, China
| | - Keting Gui
- School of Energy and Environment, Southeast University, Nanjing, 210096, Jiangsu, China
| |
Collapse
|
10
|
Qin Y, Fan S, Gao J, Tadé MO, Liu S, Li X. Effect of Cu-Doped Co-Mn Spinel for Boosting Low-Temperature NO Reduction by CO: Exploring the Structural Properties, Performance, and Mechanisms. ACS APPLIED MATERIALS & INTERFACES 2023; 15:11885-11894. [PMID: 36827641 DOI: 10.1021/acsami.2c23120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Cobalt-manganese spinel catalysts performed unsatisfactory activity at low-temperature and narrow reaction temperature window, which greatly limited the application in NO reduction by CO. Herein, we synthesize a series of Cu-doped CoMn2O4 catalysts and apply to NO reduction by CO. The Cu0.3Co0.7Mn2O4 exhibited superior catalytic performance, reaching 100% NO conversion and 80% N2 selectivity at 250 °C. Detailed structural analysis showed that the introduced Cu replaces some Co in tetrahedral coordination to induce a strong synergistic effect between different metals. This endows the catalyst with the promotion of both electron transfer and oxygen vacancy generation on the catalyst surface. Importantly, the reaction mechanism and pathway were further revealed by in situ diffusion Fourier transform infrared spectroscopy (DRIFTS) and density functional theory (DFT) calculations. The results indicated that the cycle of oxygen vacancy mainly determines the catalytic activity of NO reduction by CO. Notably, Cu doping significantly lowered the energy barrier of the rate-determining step (*CO + O → *Ov + CO2), facilitating the desorption of the CO2 and exposing the active sites for efficient NO reduction with CO. This work offers an effective way for designing the catalyst in NO reduction by CO and provides a reference for exploring the catalytic mechanism of the reaction.
Collapse
Affiliation(s)
- Yu Qin
- State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Shiying Fan
- State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Jinsuo Gao
- State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Moses O Tadé
- Department of Chemical Engineering, Curtin University, GPO Box U1987, Perth, WA 6845, Australia
| | - Shaomin Liu
- Department of Chemical Engineering, Curtin University, GPO Box U1987, Perth, WA 6845, Australia
| | - Xinyong Li
- State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| |
Collapse
|
11
|
A novel multi-components hierarchical porous composite prepared from solid wastes for benzohydroxamic acid degradation. J Colloid Interface Sci 2023; 630:714-726. [PMID: 36347098 DOI: 10.1016/j.jcis.2022.10.124] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Revised: 10/10/2022] [Accepted: 10/23/2022] [Indexed: 11/08/2022]
Abstract
In this study, a novel carbon-wrapped-iron hierarchical porous catalyst (Fe/C-Mn800) was prepared from electrolytic manganese residue (EMR) and sewage sludge (SS), which showed outstanding degradation ability toward benzohydroxamic acid (BHA, nearly 90 % was removed within 60 min) with low metal leaching rate. Mechanism exploration found transition metal ions (Fe and Mn) can serve as electron acceptors and facilitate the generation of persistent free radicals (PFRs). These transition metal ions and PFRs mainly participated in the single-electron pathway via activating PMS to generate a large amount of reactive oxygen species (ROS). While the electron negative graphitic N and CO groups not only improve the electronegatively of catalyst, but also acted as the electron sacrificers to favor the electron transfer and directly oxidized the absorbed BHA through the ternary activated outer-sphere complexes. Eley-Rideal (E-R) and Langmuir-Hinshelwood (L-H) analysis further demonstrated the crucial role of pre-adsorption during the degradation process. This work provided a deep insight into the degradation mechanism of metal/carbon composite and promising opportunity widened the horizon of the high-value utilization of EMR and SS.
Collapse
|
12
|
Excitation of catalytic performance on MOFs derivative carrier by residual carbon for low-temperature NH3-SCR reaction. MOLECULAR CATALYSIS 2023. [DOI: 10.1016/j.mcat.2022.112859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
13
|
Phosphotungstic Acid-Modified MnOx for Selective Catalytic Reduction of NOx with NH3. Catalysts 2022. [DOI: 10.3390/catal12101248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
H3PW12O40-modified MnOx catalysts (denoted as Mn-HPW) were used for NOx elimination with co-fed NH3. The optimal Mn-HPW0.02 catalyst exhibited over 90% NOx conversion at 90–270 °C. The incorporation of HPW increased the amount of Lewis acid sites of the catalyst for adsorbing NH3, and accelerated the reaction between the adsorbed NH3 species and gas-phase NOx, thus, increasing the low-temperature catalytic activity. The oxidation ability of the Mn catalyst was decreased due to the addition of HPW, thus, mitigating the overoxidation of the adsorbed NH3 species and improving the de-NOx activity and N2 selectivity in the high-temperature region. DRIFT results revealed that the NH3 species on Lewis and Brønsted acid sites, bridged nitrate, and bidentate nitrate were important species/intermediates for the reaction. NH3-SCR over the Mn and Mn-HPW0.02 catalysts obeyed the Eley–Rideal and Langmuir–Hinshelwood mechanisms, simultaneously, at 120 °C.
Collapse
|
14
|
Structure-activity strategy comparison of (NH4)2CO3 and NH4OH precipitants on MnO catalyst for low-temperature NO abatement. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
15
|
Cai Z, Zhang G, Tang Z, Zhang J. Engineering yolk-shell MnFe@CeO x@TiO x nanocages as a highly efficient catalyst for selective catalytic reduction of NO with NH 3 at low temperatures. NANOSCALE 2022; 14:12281-12296. [PMID: 35895016 DOI: 10.1039/d2nr02255a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
To broaden the reaction temperature range and improve the H2O-resistance of manganese-based catalysts, yolk-shell structured MnFe@CeOx@TiOx nanocages were prepared. The CeO2 shell could effectively increase the oxygen vacancy defect sites, and the TiO2 shell could remarkably improve the surface acid sites. Combining the advantages of the two shells could effectively solve the above questions. The catalytic efficiency of the yolk-shell MnFe@CeOx@TiOx-40 nanocages could reach above 90% in the range of 120-240 °C, and the water resistance could reach 90% at 240 °C. On the one hand, the construction of double shells could significantly increase the proportion of active species (Mn4+, Fe3+, Ce3+ and Oads) and the interface effect between the shell layers could effectively enhance the interaction between metal oxides. On the other hand, the construction of double shells could achieve an appropriate balance between the redox capacity of the catalyst and surface acidity. Simultaneously, in situ DRIFT spectroscopy indicated that the yolk-shell MnFe@CeOx@TiOx-40 nanocages mainly followed the L-H mechanism during the NH3-SCR reaction. Finally, this double-shell structure strategy provided a new idea for constructing a Mn-based catalyst with a wide temperature window and better low-temperature water resistance.
Collapse
Affiliation(s)
- Ziguo Cai
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, and National Engineering Research Center for Fine Petrochemical Intermediates, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China.
- School of Petroleum and Chemical, Lanzhou University of Technology, Lanzhou 730050, China.
| | - Guodong Zhang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, and National Engineering Research Center for Fine Petrochemical Intermediates, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China.
| | - Zhicheng Tang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, and National Engineering Research Center for Fine Petrochemical Intermediates, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China.
- Yantai Zhongke Research Institute of Advanced Materials and Green Chemical Engineering, Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing, Yantai, 264006, China
| | - Jiyi Zhang
- School of Petroleum and Chemical, Lanzhou University of Technology, Lanzhou 730050, China.
| |
Collapse
|
16
|
Dreyer M, Hagemann U, Heidelmann M, Budiyanto E, Cosanne N, Ortega KF, Najafishirtari S, Hartmann N, Tüysüz H, Behrens M. Beneficial Effects of Low Iron Contents on Cobalt‐Containing Spinel Catalysts in the Gas Phase 2‐Propanol Oxidation. ChemCatChem 2022. [DOI: 10.1002/cctc.202200472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Maik Dreyer
- University of Duisburg-Essen: Universitat Duisburg-Essen Faculty of Chemistry GERMANY
| | - Ulrich Hagemann
- University of Duisburg-Essen: Universitat Duisburg-Essen ICAN GERMANY
| | - Markus Heidelmann
- University of Duisburg-Essen: Universitat Duisburg-Essen ICAN GERMANY
| | - Eko Budiyanto
- Max-Planck-Institute für Kohlenforschung: Max-Planck-Institut fur Kohlenforschung Heterogeneous Catalysis GERMANY
| | - Nicolas Cosanne
- Christian-Albrechts-Universität zu Kiel: Christian-Albrechts-Universitat zu Kiel Institute of Inorganic Chemistry GERMANY
| | - Klaus Friedel Ortega
- Christian-Albrechts-Universität zu Kiel: Christian-Albrechts-Universitat zu Kiel Institut of Inorganic Chemistry GERMANY
| | - Sharif Najafishirtari
- Christian-Albrechts-Universität zu Kiel: Christian-Albrechts-Universitat zu Kiel Institute of Inorganic Chemistry GERMANY
| | - Nils Hartmann
- Universität Duisburg-Essen: Universitat Duisburg-Essen ICAN GERMANY
| | - Harun Tüysüz
- Max-Planck-Institute für Kohlenforschung: Max-Planck-Institut fur Kohlenforschung Heterogeneous Catalysis GERMANY
| | - Malte Behrens
- Kiel University Institute of Inorganic Chemistry Max-Eyth-Str. 2 24118 Kiel GERMANY
| |
Collapse
|
17
|
A strategy for constructing highly efficient Co3O4-C@SiO2 nanofibers catalytic membrane for NH3-SCR of NO and dust filtration. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.120997] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
18
|
Zhang Y, Zhao L, Chen Z, Li X. Promotional effect for SCR of NO with CO over MnO -doped Fe3O4 nanoparticles derived from metal-organic frameworks. Chin J Chem Eng 2022. [DOI: 10.1016/j.cjche.2021.03.043] [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]
|
19
|
Qi X, Han L, Deng J, Lan T, Wang F, Shi L, Zhang D. SO 2-Tolerant Catalytic Reduction of NO x via Tailoring Electron Transfer between Surface Iron Sulfate and Subsurface Ceria. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:5840-5848. [PMID: 35446019 DOI: 10.1021/acs.est.2c00944] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Currently, SO2-induced catalyst deactivation from the sulfation of active sites turns to be an intractable issue for selective catalytic reduction (SCR) of NOx with NH3 at low temperatures. Herein, SO2-tolerant NOx reduction has been originally demonstrated via tailoring the electron transfer between surface iron sulfate and subsurface ceria. Engineered from the atomic layer deposition followed by the pre-sulfation method, the structure of surface iron sulfate and subsurface ceria was successfully constructed on CeO2/TiO2 catalysts, which delivered improved SO2 resistance for NOx reduction at 250 °C. It was demonstrated that the surface iron sulfate inhibited the sulfation of subsurface Ce species, while the electron transfer from the surface Fe species to the subsurface Ce species was well retained. Such an innovative structure of surface iron sulfate and subsurface ceria notably improved the reactivity of NHx species, thus endowing the catalysts with a high NOx reaction efficiency in the presence of SO2. This work unraveled the specific structure effect of surface iron sulfate and subsurface ceria on SO2-toleant NOx reduction and supplied a new point to design SO2-tolerant catalysts by modulating the unique electron transfer between surface sulfate species and subsurface oxides.
Collapse
Affiliation(s)
- Xinran Qi
- International Joint Laboratory of Catalytic Chemistry, State Key Laboratory of Advanced Special Steel, Department of Chemistry, Research Center of Nano Science and Technology, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Lupeng Han
- International Joint Laboratory of Catalytic Chemistry, State Key Laboratory of Advanced Special Steel, Department of Chemistry, Research Center of Nano Science and Technology, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Jiang Deng
- International Joint Laboratory of Catalytic Chemistry, State Key Laboratory of Advanced Special Steel, Department of Chemistry, Research Center of Nano Science and Technology, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Tianwei Lan
- International Joint Laboratory of Catalytic Chemistry, State Key Laboratory of Advanced Special Steel, Department of Chemistry, Research Center of Nano Science and Technology, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Fuli Wang
- International Joint Laboratory of Catalytic Chemistry, State Key Laboratory of Advanced Special Steel, Department of Chemistry, Research Center of Nano Science and Technology, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Liyi Shi
- International Joint Laboratory of Catalytic Chemistry, State Key Laboratory of Advanced Special Steel, Department of Chemistry, Research Center of Nano Science and Technology, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Dengsong Zhang
- International Joint Laboratory of Catalytic Chemistry, State Key Laboratory of Advanced Special Steel, Department of Chemistry, Research Center of Nano Science and Technology, College of Sciences, Shanghai University, Shanghai 200444, China
| |
Collapse
|
20
|
Zhang X, Han L, Chen H, Wang S. Direct catalytic nitrogen oxide removal using thermal, electrical or solar energy. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2021.07.034] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
21
|
Xu M, Wu Y, Zhang P, Liu Z, Hu Z, Lu Q. Green and Moderate Activation of Coal Fly Ash and Its Application in Selective Catalytic Reduction of NO with NH 3. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:2582-2592. [PMID: 35089688 DOI: 10.1021/acs.est.1c05516] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Coal fly ash (CFA) is an ideal source for the preparation of heterogeneous catalysts due to its abundant silicon and aluminum oxides, but its activity needs to be improved. In this study, a green and moderate approach for CFA activation was proposed, and a series of CFA-based catalysts were prepared for NO selective catalytic reduction (SCR). The results indicated that CFA could be well activated via mechanochemical activation with 3 h of milling duration in 1 mol/L of acetic acid, and 90% of NO removal was achieved over the CFA-based catalyst in 250 to 375 °C. Two activating mechanisms, i.e., the enhanced CFA fragmentation and the motivated Al dissolution, were revealed during the mechanochemical activation. The former facilitated the formation of mesopores and the exposure of Fe components in CFA fragments, which enhanced the capacity of oxygen storage over the as-activated catalyst. The latter motivated the formation of Si-OH groups, which promoted the migration of electrons and the dispersion of V species, thereby increasing the capacity of NH3 adsorption over the as-obtained catalyst. Therefore, the performance of NO reduction was improved. The proposed activating approach could be a promising integration for CFA disposal and NO removal from inside coal-fired power plants.
Collapse
Affiliation(s)
- Mingxin Xu
- National Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, Beijing 102206, P. R. China
| | - Yachang Wu
- National Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, Beijing 102206, P. R. China
| | - Pingxin Zhang
- National Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, Beijing 102206, P. R. China
| | - Zishu Liu
- National Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, Beijing 102206, P. R. China
| | - Zhuang Hu
- National Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, Beijing 102206, P. R. China
| | - Qiang Lu
- National Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, Beijing 102206, P. R. China
| |
Collapse
|
22
|
Zheng W, Zhang X, Zheng Y, Yue Y. "Oxynitride trap" over N/S co-doped graphene-supported catalysts promoting low temperature NH 3-SCR performance: Insight into the structure and mechanisms. JOURNAL OF HAZARDOUS MATERIALS 2022; 423:127187. [PMID: 34560481 DOI: 10.1016/j.jhazmat.2021.127187] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 08/28/2021] [Accepted: 09/07/2021] [Indexed: 06/13/2023]
Abstract
A series of nitrogen and sulfur (N/S) co-doped graphene supported catalysts (Mn-Ce-SnOx/NSG) were synthesized using an in situ method for enhancing selective catalytic reduction of NOx with NH3 (NH3-SCR) performance. The changes in catalysts' structure, morphology, and active sites were systematically researched to explore the promoting effect of N/S co-doped on catalytic performance. The prepared Mn-Ce-SnOx/NSG-0.3 catalyst achieves an excellent SCR activity at a low temperature, which is comparable to previous graphene-based catalysts. The Ce3+/(Ce3+ + Ce4+), Mn4+/Mn3+, and Oα/(Oα + Oβ) ratios in the catalyst are improved by N/S co-doping, which closely related to excellent SCR activity. Meanwhile, the unpaired electrons on N/S functional groups are effective in promoting the adsorption and further oxidation of gaseous NO. The ability to adsorb NH3 has also been promoted result of numerous Lewis acid sites over Mn-Ce-SnOx/NSG-0.3. In-situ DRIFTS and reaction kinetic results suggest that the Eley-Rideal mechanism should be the most significant pathway in the temperature range of ≥ 200 °C, where coordinated NH3 has higher activity than ionic NH4+. The Langmuir-Hinshelwood (L-H) mechanism is the main route of the low-temperature (L-T) (< 200 °C) SCR reaction. Particularly, the L-T SCR activity improves because the N/S functional groups act as an additional "oxynitride trap" (based on the L-H mechanism).
Collapse
Affiliation(s)
- Weijie Zheng
- College of Materials Science and Engineering, Fuzhou University, Fuzhou 350116, PR China
| | - Xiang Zhang
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, State Key Laboratory of Structural Chemistry, Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, PR China
| | - Yuying Zheng
- College of Materials Science and Engineering, Fuzhou University, Fuzhou 350116, PR China.
| | - Yuanyuan Yue
- National Engineering Research Center of Chemical Fertilizer Catalyst, College of Chemical Engineering, Fuzhou University, Fuzhou 350002, PR China.
| |
Collapse
|
23
|
Feng C, Xiong G, Jiang F, Gao Q, Chen C, Pan Y, Fei Z, Li Y, Lu Y, Liu C, Liu Y. Assembly of sphere-structured MnO2 for total oxidation of propane: Structure-activity relationship and reaction mechanism determination. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.120269] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
|
24
|
Kim J, Kim DH, Park J, Jeong K, Ha HP. Decrypting Catalytic NOX Activation and Poison Fragmentation Routes Boosted by Mono- and Bi-Dentate Surface SO32–/SO42– Modifiers under a SO2-Containing Flue Gas Stream. ACS Catal 2022. [DOI: 10.1021/acscatal.1c04611] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Jongsik Kim
- Extreme Materials Research Center, Korea Institute of Science and Technology, Seoul 02792, South Korea
| | - Dong Ho Kim
- Extreme Materials Research Center, Korea Institute of Science and Technology, Seoul 02792, South Korea
- Department of Chemical and Biological Engineering, Korea University, Seoul 02841, South Korea
| | - Jinseon Park
- Department of Physics and Chemistry, Korea Military Academy, Seoul 01805, South Korea
| | - Keunhong Jeong
- Department of Physics and Chemistry, Korea Military Academy, Seoul 01805, South Korea
| | - Heon Phil Ha
- Extreme Materials Research Center, Korea Institute of Science and Technology, Seoul 02792, South Korea
| |
Collapse
|
25
|
Wang L, Ye R, Jian P, Liu J. Pumpkin-derived N-doped porous carbon for enhanced liquid-phase reduction of 2-methyl-4-nitrophenol. J Colloid Interface Sci 2022; 606:1758-1766. [PMID: 34500173 DOI: 10.1016/j.jcis.2021.08.141] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Revised: 08/21/2021] [Accepted: 08/21/2021] [Indexed: 12/17/2022]
Abstract
Metal-free catalysts with environmental friendless, cost-competitiveness and less susceptibility to leaching and poisoning over metal-based catalysts, have revolutionized in the catalysis domain. In this respect, we herein report the first application of cheap and abundant pumpkin-derived N-doped porous carbon for the reduction of 2-methyl-4-nitrophenol assisted by NaBH4. The obtained catalyst is cost-competitive, efficient and robust, with an attractive mass-normalized rate constant of 4.73 s-1 g-1 and good recycling performance. Systematical analyses demonstrate that the 2-methyl-4-nitrophenol reduction reaction catalyzed by the N-doped carbon proceeds through the Langmuir-Hinshelwood kinetics and the performance enhancement benefits from the strong adsorption and activation of the substrates induced by the electronic modulation in the carbon framework via N-doping. This study opens up new avenues for the high-value use of pumpkin as well as the development of metal-free strategy in more catalytic applications.
Collapse
Affiliation(s)
- Lixia Wang
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China
| | - Rongfei Ye
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China
| | - Panming Jian
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China
| | - Jiangyong Liu
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China.
| |
Collapse
|
26
|
Ko S, Gao F, Yao X, Yi H, Tang X, Wang C, Liu H, Luo N, Qi Z. Synthesis of metal–organic frameworks (MOFs) and their application in the selective catalytic reduction of NO x with NH 3. NEW J CHEM 2022. [DOI: 10.1039/d2nj02358j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review summarizes the synthesis, applications for the NH3-SCR and methods for strengthening the water resistance and thermal stability of MOF catalysts.
Collapse
Affiliation(s)
- Songjin Ko
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
- Department of Chemistry, Pyongyang University of Architecture, Pyongyang, DPR of Korea
| | - Fengyu Gao
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing 100083, China
| | - Xiaolong Yao
- Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry, Beijing Technology and Business University, Beijing 100048, China
| | - Honghong Yi
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing 100083, China
| | - Xiaolong Tang
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing 100083, China
| | - Chengzhi Wang
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Hengheng Liu
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Ning Luo
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Zhiying Qi
- School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
| |
Collapse
|
27
|
Wang L, Ren Y, Yu X, Yu D, Peng C, Zhou Q, Hou J, Zhong C, Yin C, Fan X, Zhao Z, Cheng K, Chen Y, Sojka Z, Kotarba A, Wei Y, Liu J. Facile preparation, catalytic performance and reaction mechanism of MnxCo1-xOδ/3DOM-m Ti0.7Si0.2W0.1Oy catalysts for the simultaneous removal of soot and NOx. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00077f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, three-dimensionally ordered macroporous-mesoporous Ti0.7Si0.2W0.1Oy (3DOM-m TiSiWO) supported MnxCo1-xOδ catalysts with different x values were prepared using the colloidal crystal template method and incipient wetness impregnation method. The...
Collapse
|
28
|
Lyu M, Zou J, Liu X, Yan T, Wang P, Zhang D. Insight on the anti-poisoning mechanism of in situ coupled sulfate over iron oxide catalysts in NO x reduction. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00434h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In situ coupled sulfate uniquely migrated to the surface of iron oxide catalysts to capture metal poisons and thus maintained efficient adsorption and activation of NH3 and NOx reactants.
Collapse
Affiliation(s)
- Minghui Lyu
- International Joint Laboratory of Catalytic Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Jingjing Zou
- International Joint Laboratory of Catalytic Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Xiangyu Liu
- International Joint Laboratory of Catalytic Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Tingting Yan
- International Joint Laboratory of Catalytic Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Penglu Wang
- International Joint Laboratory of Catalytic Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Dengsong Zhang
- International Joint Laboratory of Catalytic Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
| |
Collapse
|
29
|
Feng C, Wang P, Liu X, Wang F, Yan T, Zhang J, Zhou G, Zhang D. Alkali-Resistant Catalytic Reduction of NO x via Naturally Coupling Active and Poisoning Sites. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:11255-11264. [PMID: 34323076 DOI: 10.1021/acs.est.1c02061] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Releasing the poisoning effect of alkali metals over catalysts is still an intractable issue for selective catalytic reduction (SCR) of NOx with ammonia. The presence of K in fly ash always dramatically suppressed catalytic activity by impairing acidity and redox properties, leading to severe reduction of lifetime for SCR catalysts. Herein, alkali-resistant NOx reduction over TiO2-supported Fe2(SO4)3 catalysts was originally demonstrated via naturally coupling active and poisoning sites. Notably, TiO2-supported Fe2(SO4)3 catalysts expressed admirable NOx conversion and K resistance within a quite broad temperature window of 200-500 °C. The catalysts with more conserved sulfate species revealed that sulfate groups preferred to migrate from the bulk phase to surface, thus effectively binding with K poisons to release the damage on iron active sites. Because of protection effects of migrated sulfates and closely coupling effects with Fe active sites, NH3 and NO adsorption amounts and rates were well maintained. In this way, Fe metal sites and sulfate species closely coupled together on a self-preserved TiO2-supported Fe2(SO4)3 catalyst played essential roles as highly active sites and unique poisoning sites. This work paves a new way to design SCR catalysts with superior alkali resistance that are more reliable in practical deNOx application.
Collapse
Affiliation(s)
- Chong Feng
- State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, International Joint Laboratory of Catalytic Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Penglu Wang
- State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, International Joint Laboratory of Catalytic Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Xiangyu Liu
- State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, International Joint Laboratory of Catalytic Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Fuli Wang
- State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, International Joint Laboratory of Catalytic Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Tingting Yan
- State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, International Joint Laboratory of Catalytic Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Jianping Zhang
- State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, International Joint Laboratory of Catalytic Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Guangyuan Zhou
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Dengsong Zhang
- State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, International Joint Laboratory of Catalytic Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
| |
Collapse
|
30
|
Zhao Z, Ren H, Yang D, Han Y, Shi J, An K, Chen Y, Shi Y, Wang W, Tan J, Xin X, Zhang Y, Jiang Z. Boosting Nitrogen Activation via Bimetallic Organic Frameworks for Photocatalytic Ammonia Synthesis. ACS Catal 2021. [DOI: 10.1021/acscatal.1c02465] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Zhanfeng Zhao
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, Tianjin 300072, People’s Republic of China
| | - Hanjie Ren
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, Tianjin 300072, People’s Republic of China
| | - Dong Yang
- Key Laboratory of Systems Bioengineering of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of China
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, People’s Republic of China
| | - You Han
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of China
| | - Jiafu Shi
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, Tianjin 300072, People’s Republic of China
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, People’s Republic of China
| | - Ke An
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, Tianjin 300072, People’s Republic of China
| | - Yao Chen
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, Tianjin 300072, People’s Republic of China
| | - Yonghui Shi
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, Tianjin 300072, People’s Republic of China
| | - Wenjing Wang
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, Tianjin 300072, People’s Republic of China
| | - Jiangdan Tan
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, Tianjin 300072, People’s Republic of China
| | - Xin Xin
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, Tianjin 300072, People’s Republic of China
| | - Yue Zhang
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of China
| | - Zhongyi Jiang
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, Tianjin 300072, People’s Republic of China
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou 350207, People’s Republic of China
| |
Collapse
|
31
|
Facile synthesis of hollow nanotube MnCoOx catalyst with superior resistance to SO2 and alkali metal poisons for NH3-SCR removal of NOx. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.118517] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
32
|
A Study on Mn-Fe Catalysts Supported on Coal Fly Ash for Low-Temperature Selective Catalytic Reduction of NOX in Flue Gas. Catalysts 2020. [DOI: 10.3390/catal10121399] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A series of Mn0.15Fe0.05/fly-ash catalysts have been synthesized by the co-precipitation method using coal fly ash (FA) as the catalyst carrier. The catalyst showed high catalytic activity for low-temperature selective catalytic reduction (LTSCR) of NO with NH3. The catalytic reaction experiments were carried out using a lab-scale fixed-bed reactor. De-NOx experimental results showed the use of optimum weight ratio of Mn/FA and Fe/FA, resulted in high NH3-SCR (selective catalytic reduction) activity with a broad operating temperature range (130–300 °C) under 50000 h−1. Various characterization methods were used to understand the role of the physicochemical structure of the synthesized catalysts on their De-NOx capability. The scanning electron microscopy, physical adsorption-desorption, and X-ray photoelectron spectroscopy showed the interaction among the MnOx, FeOx, and the substrate increased the surface area, the amount of high valence metal state (Mn4+, Mn3+, and Fe3+), and the surface adsorbed oxygen. Hence, redox cycles (Fe3+ + Mn2+ ↔ Mn3+ + Fe2+; Fe2+ + Mn4+ ↔ Mn3+ + Fe3+) were co-promoted over the catalyst. The balance between the adsorption ability of the reactants and the redox ability can promote the excellent NOx conversion ability of the catalyst at low temperatures. Furthermore, NH3/NO temperature-programmed desorption, NH3/NO- thermo gravimetric-mass spectrometry (NH3/NO-TG-MS), and in-situ DRIFTs (Diffuse Reflectance Infrared Fourier Transform Spectroscopy) results showed the Mn0.15Fe0.05/FA has relatively high adsorption capacity and activation capability of reactants (NO, O2, and NH3) at low temperatures. These results also showed that the Langmuir–Hinshelwood (L–H) reaction mechanism is the main reaction mechanism through which NH3-SCR reactions took place. This work is important for synthesizing an efficient and environmentally-friendly catalyst and demonstrates a promising waste-utilization strategy.
Collapse
|
33
|
Song I, Lee H, Jeon SW, Kim DH. Controlling Catalytic Selectivity Mediated by Stabilization of Reactive Intermediates in Small-Pore Environments: A Study of Mn/TiO2 in the NH3-SCR Reaction. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03154] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Inhak Song
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea
| | - Hwangho Lee
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea
| | - Se Won Jeon
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea
| | - Do Heui Kim
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul 08826, Republic of Korea
| |
Collapse
|