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Catalytic combustion of VOCs on Pt/CuMnCe and Pt/CeY honeycomb monolithic catalysts

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Journal of Rare Earths 2018年第12期36卷 1272-1277页

作者： Anming Zhu Ying Zhou Yue Wang Qiulian Zhu Huayan Liu Zekai Zhang Hanfeng Lu Innovation Team of Air Pollution Control College of Chemical Engineering Institute of Catalytic Reaction Engineering Zhejiang University of Technology

The metal oxides CuMnCe and CeY washcoats on cordierite were prepared using an impregnation method, and then used as support for the active Pt component to prepare the Pt/CuMnCe and Pt/CeY monolithic catalysts for the deep oxidation of VOCs. In comparison with the Pt/CeY, CuMnCe, and CeY monolithic catalysts, the Pt/CuMnCe monolithic catalyst shows an excellent performance for toluene,ethyl acetate,and n-hexane oxidation and the Tis low to 216, 200 and 260 ℃,respectively. The active components Pt/PtO and CuMnCe result in a better synergetic interaction, which promote the catalyst reducibility, increase the oxygen mobility, and enhance the adsorption and activation of organic molecules.

关键词： Catalytic combustion Volatile organic compounds monolithic catalysts Pt catalyst Cu-Mn-Ce mixed oxides

Oxidative coupling of methane in a dual-bed reactor comprising of particle/cordierite monolithic catalysts

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Journal of Natural Gas Chemistry 2010年第6期19卷 600-604页

作者： Deng Pan Shengfu Ji Wenhua Wang Chengyue Li State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Beijng 100029 China

A dual-bed reactor was constructed comprising of a 5%Na2WO4-2%Mn/SiO2 particle catalyst and a 4%Ce-5%Na2WO4-2%Mn/SiO2 /cordierite monolithic *** reaction performance of the oxidative coupling of methane （OCM） over the dual-bed reactor system was *** effects of the bed height and operation mode,as well as the reaction parameters such as reaction temperature,CH4/O2 ratio and flowrate of feed gas,on the catalytic performance were *** results indicated that the suggested dual-bed reactor exhibited a good performance for the OCM reaction when the feed gases firstly passed through the particle catalyst bed and then to the monolithic catalyst bed.A CH4 conversion of 38.2% and a C2H4 selectivity of 43.3% could be obtained using the dual-bed reactor with a particle catalyst bed height of 10 mm and a monolithic catalyst bed height of 50 *** the CH4 conversion and C2H4 selectivity have increased by 2.5% and 12.8%,respectively,as compared with the 5%Na2WO4-2%Mn/SiO2 particle catalyst in a conventional single-bed reactor and by 12.9% and 23.0%,respectively,as compared with the 4%Ce-5%Na2WO4-2%Mn/SiO2 /cordierite monolithic catalyst in a single-bed *** catalytic performance of the OCM in the dual-bed reactor system has been improved remarkably.

关键词： oxidative coupling of methane dual-bed reactor monolithic catalysts

Low-temperature and stable CO oxidation of Co_(3)O_(4)/TiO_(2) monolithic catalysts

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Chinese Chemical Letters 2021年第1期32卷 48-52页

作者： Xinyue Tang Junchao Wang Yonghui Ma Jing Li Xinglai Zhang Baodan Liu Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Foshan Graduate School of Northeastern University Foshan 528300China Structure Analysis Division Testing CenterInstitute of Metal ResearchChinese Academy of ScienceShenyang 110016China

Highly efficient Co_(3)O_(4)/TiO_(2) monolithic catalysts with enhanced stability were in-situ grown on Ti mesh for CO oxidation,which could completely oxidize CO at 120℃.The comprehensive catalytic performance is competitive to some noble metal catalysts and conventional Co_(3)O_(4) powder catalysts,which holds great potential toward industrial ***,the in-situ synthesis strategy of Co_(3)O_(4)/TiO_(2) monolithic catalysts on flexible mesh substrate in this work can be extended to the development of a variety of oxide-based monolithic catalysts towards diverse catalysis applications.

关键词： Co_(3)O_(4)/TiO_(2) In-situ growth monolithic catalysts Long-term stability CO oxidation

Metal-Support Interactions on Ag/Co_(3)O_(4)Nanowire monolithic catalysts Promoting Catalytic Soot Combustion

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Transactions of Tianjin University 2022年第3期28卷 174-185页

作者： Xingwang Yi Yuexi Yang Dawei Xu Ye Tian Song Song Chunmei Cao Xingang Li School of Chemical Engineering&Technology Tianjin UniversityTianjin 300350China Institute of Shaoxing Tianjin UniversityShaoxing 312000China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) Tianjin Key Laboratory of Applied Catalysis Science and EngineeringTianjin UniversityTianjin 300350China School of Chemical Engineering Zhengzhou UniversityZhengzhou 45000China

Tuning metal-support interactions(MSIs)is an important strategy in heterogeneous catalysis to realize the desirable metal dispersion and redox ability of metal ***,we use pre-reduced Co_(3)O_(4)nanowires(Co-NWs)in situ grown on monolithic Ni foam substrates to support Ag catalysts(Ag/Co-NW-R)for soot *** macroporous structure of Ni foam with crossed Co_(3)O_(4)nanowires remarkably increases the soot-catalyst contact effi *** characterization results demonstrate that Ag species exist as Ag 0 because of the equation Ag^(+)+Co^(2+)=Ag^(0)+Co^(3+),and the pre-reduction treatment enhances interactions between Ag and Co_(3)O_(4).The number of active oxygen species on the Ag-loaded catalysts is approximately twice that on the supports,demonstrating the signifi cant role of Ag sites in generating active oxygen ***,the strengthened MSI on Ag/Co-NW-R further improves this number by increasing metal dispersion and the intrinsic activity determined by the turnover frequency of these oxygen species for soot oxidation compared with the catalyst without pre-reduction of Co-NW(Ag/Co-NW).In addition to high activity,Ag/Co-NW-R exhibits high catalytic stability and water *** strategy used in this work might be applicable in related catalytic systems.

关键词： Metal-support interaction monolithic catalysts Ag Co_(3)O_(4)nanowires Soot oxidation

One-Pot Three-Dimensional Printing Robust Self-Supporting MnO_(x)/Cu-SSZ-13 Zeolite monolithic catalysts for NH_(3)-SCR

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CCS Chemistry 2022年第5期4卷 1708-1719页

作者： Yingzhen Wei Mengyang Chen Xiaoyu Ren Qifei Wang Jinfeng Han Wenzheng Wu Xiangguang Yang Shuang Wang Jihong Yu State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012 International Center of Future Science Jilin UniversityChangchun 130012 School of Mechanical and Aerospace Engineering Jilin UniversityChangchun 130025 State Key Laboratory of Rare Earth Resource Utilization Jilin Province Key Laboratory of Green Chemistry and ProcessChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022 Henan Province Function-Oriented Porous Materials Key Laboratory College of Chemistry and Chemical EngineeringLuoyang Normal UniversityLuoyang 471934

Honeycomb cordierite coated with Cu-SSZ-13 zeolite is widely used for the selective catalytic reduction of NO_(x) with NH_(3)(NH_(3)-SCR)to reduce pollutants from vehicle ***,conventional honeycomb catalysts fabricated via coating techniques are limited by low zeolite loadings,loss of the deposited zeolites,and complicated preparation ***,a facile,one-step three-dimensional(3D)printing strategy is developed to construct MnO_(x)/Cu-SSZ-13 monolithic catalysts with excellent catalytic performance for NH_(3)-***-containing halloysite nanotubes(Fe-HNTs)are introduced as printing ink additives to ensure mechanical stability and modulate the NH_(3)-SCR performance of monolithic catalysts in high temperature *** situ incorporation of Mn into the Cu-SSZ-13 zeolite monoliths during the 3D printing process boosts the mechanical strength of the monolithic structures from 2.54 MPa to 4.33 MPa as well as broadens the temperature window(165-550℃)of the catalysts for NH_(3)-SCR with NO_(x) conversion of above 80%.Such robust multicomponent-integrated 3D-printed selfsupporting catalysts not only possess high zeolite loading and excellent catalytic activity,but also avoid complicated manufacturing processes,which contrasts with conventional honeycomb catalysts fabricated by extrusion coupled with coating.

关键词： 3D printing metal-doped Cu-SSZ-13 zeolites NH_(3)-SCR monolithic catalysts mechanical strength

In-situ growth of large-area monolithic Fe_(2)O_(3)/TiO_(2) catalysts on flexible Ti mesh for CO oxidation

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Journal of Materials Science & Technology 2021年第10期69卷 119-128页

作者： Xinyue Tang Junchao Wang Jing Li Xinglai Zhang Peiqing La Xin jiang Baodan Liu Shenyang National Laboratory for Materials Science(SYNL) Institute o f Metal Research(IMR)Chinese Academy of Sciences(CAS)No.72 Wenhua RoadShenyang110016 China School of Materials Science and Engineering University of Science and Technology of ChinaNo.72 Wenhua Road.Shenyang110016 China State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of TechnologyLanzhou730050China

In this study, we reported the in-situ fabrication of a series of Fe_(2)O_(3)/TiO_(2) monolithic catalysts on flexible Ti mesh via plasma electrolytic oxidation process, hydrothermal reaction and chemical bath deposition(CBD) method. The morphology tailoring of Fe_(2)O_(3) nanostructures finds that Fe2O3 nanosheets supported on TiO2 exhibit superior catalytic performance with a complete oxidation of CO at 260℃. The catalytic stability test indicates that the in-situ grown Fe_(2)O_(3)/TiO_(2) catalysts own outstanding performance for continuous CO oxidation due to the strong substrate adhesion without mass loss. The microstructures and interfaces of Fe_(2)O_(3)/TiO_(2) catalysts are well studied using series of characterization techniques. The in-situ preparation strategy of metal oxide catalysts in this work will open up more opportunities for the rational design of variety of monolithic catalysts used for CO oxidation, de-NO_(x), three-way catalysis and other related application in industry.

关键词： Fe_(2)O_(3)/TiO_(2)nanostructures monolithic catalysts Plasma electrolytic oxidation In-situ fabrication CO oxidation

In-situ synthesis of monolithic Cu-Mn-Ce/cordierite catalysts towards VOCs combustion

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Journal of Rare Earths 2011年第9期29卷 855-860页

作者：卢晗锋周瑛黄海凤张波陈银飞 College of Chemical Engineering and Material Science Zhejiang University of Technology

A monolithic series of Cu-Mn-Ce oxides supported on cordierites with different Cu/Mn/Ce molar ratios were prepared by the in-situ sol-gel method without any binder. The catalysts were characterized by scanning electron microscopy （SEM）, energy dispersive spectrometer （EDS）, X-ray diffraction （XRD）, and Brunauer-Emmett-Teller method （BET） and examined in the catalytic combustion of volatile organic compounds （VOCs）. The results showed that the well-dispersed nanometer particles of mixed oxides adhered firmly to the cordierite surface. Cu0.15Mn0.3Ce55/cordierite was identified as the most active catalyst. Compared with commercial Pd/Al2O3, Cu0.15Mn0.3Ce55/cordierite showed higher activities for the combustion of various types of VOCs, especially for oxy-derivative compounds which could be lighted off below 200 ℃.

关键词： catalytic combustion volatile organic compounds (VOCs) monolithic catalysts Cu-Mn-Ce mixed oxides rare earths

Atomic Pt anchored on hierarchically porous monolithic carbon nanowires as high-performance catalyst for liquid hydrogenation

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Nano Research 2023年第4期16卷 5880-5886页

作者： Zhengbin Tian Xiaohui Deng Ping He Guang-Hui Wang Key Laboratory of Biofuels Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101China University of Chinese Academy of Sciences 100049 BeijingChina

monolithic catalysts play a crucial role in various catalytic applications,e.g.,chemical synthesis,energy conversion,and environmental treatment,but their catalytic efficiency is often limited by the restricted mass transfer and insufficient exposure of active ***,we present a dual-templating strategy to fabricate atomic Pt dispersed on monolithic N-doped mesoporous carbon nanowires(Pt_(1)/NMCW)with abundant super-/macropores,which,as monolithic catalyst,exhibits high catalytic performance in hydrogenation of 4-nitrophenol(4-NP).During synthesis,triblock copolymer(Pluronic F127)is employed as a primary soft template to generate the mesoporous structured carbon nanowires to improve the accessibility of Pt single sites;KCl crystallite is used as a secondary hard template to create the super-/macropores,which are beneficial for enhancing the mass transfer *** to the dual-templating strategy that creates the monolithic carbon nanowires with hierarchically porous structure,the obtained Pt_(1)/NMCW shows highly enhanced catalytic activity in 4-NP hydrogenation,outperforming its analogue synthesized without using KCl as template and being comparable to the nano-powder catalyst(i.e.,atomic Pt loaded on the Ndoped carbon nanospheres,Pt_(1)/NCS).

关键词： dual-templating strategy monolithic catalysts porous carbon nanowires Pt single atoms hydrogenation