检索结果-南通市图书馆

Mn-Ce-Nb-O_x/P84 catalytic filters prepared by a novel method for simultaneous removal of particulates and NO

Journal of Rare Earths 2019年第3期37卷 273-281页

作者： Bo Yang Qiong Huang mindong chen Yuesong Shen Shemin Zhu Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (CICAEET) Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control School of Environmental Science and Engineering Nanjing University of Information Science & Technology Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) College of Materials Science and Engineering Nanjing Tech University

The Mn-Ce-Nb-O_x/P84 catalytic filter for removal of particulates and NO simultaneous was prepared by a novel method(foam coating method). The process parameters including the concentrations of PTFE emulsion, particle size of catalyst and calcination temperature for preparation of catalytic filters were analyzed. In addition, the physical properties and performance for removal of NO(NH_3-SCR) and particulates of Mn-Ce-Nb-O_x/P84 catalytic filter prepared under the optimized parameters, were also systematic studied. Results show that the process parameters had significant influences on stability and performance of catalytic filter, The Mn-Ce-Nb-O_x/P84 catalytic filter prepared by foam coating method under the optimized parameters, has satisfactory physical properties and catalytic performance for removal of NO and particulates at 140-220 ℃. The NO removal efficiency of catalytic filter can reach95.3% at 200 ℃ as the catalyst loading amount is 450 g/m^2, Moreover,the dust removal efficiency of MnGe-Nb-O_x/P84 catalytic filter reaches as high as 99.98%, and the PM2.5 removal efficiency also reaches99.98%. The anti-sulfur performance of Mn-Ce-Nb-O_x catalytic filter is also attractive, after injecting150 ppm SO_2, the NO removal efficiency still retains up to 85%. It is indicated that the foam coating method can not only make a bond of high strength between catalyst and filter, but also make the catalytic filter possessing an excellent and stable performance for removal of NO and particulates.

关键词： Foam coating method Simultaneous removal Mn-Ce-Nb-O_x/P84 catalytic filters NO Particulates Preparation method

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Data mining to effect of key alloying elements on corrosion resistance of low alloy steels in Sanya seawater environmentAlloying Elements

引用

Journal of Materials Science & Technology 2021年第5期64卷 222-232页

作者： Xin Wei Dongmei Fu mindong chen Wei Wu Dequan Wu Chao Liu School of Automation and Electrical Engineering University of Science and Technology BeijingBeijing100083China Beijing Engineering Research Center of Industrial Spectrum Imaging University of Science and Technology BeijingBeijing 100083China SINOPEC Research Institute of Safety Engineering Qingdao266100China Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing100083China

In this paper,the relationship model between seawater environment,chemical composition and corrosion potential of low alloy steel is established and the distribution of corrosion potential of low alloy steel with changes in key alloying elements is *** research was carried out with the following steps:Firstly,the relationship model between corrosion potential of low alloy steel and its influencing factors was established by data dimension reduction and artificial neural network(ANN).Secondly,key alloying elements of experimental steels were selected out by Pearson correlation analysis,then the corrosion resistance element model was visualized to show the effect of key alloying elements on corrosion potential of low alloy ***,corrosion potential of low alloy steel with the change of key alloying elements was classified and visualized by classification *** mining results can reflect the validity of the proposed mining methods to a certain extent and provide an intuitive data basis for the development of high-quality and low-cost low alloy steels.

关键词： Low alloy steel Corrosion potential Key alloying elements Corrosion-resistant alloy Artificial neural network Data-driven model

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Rationally designed/constructed MnO_x/WO_3 anode for photoelectrochemical water oxidation

引用

Chinese Chemical Letters 2018年第6期29卷 811-814页

作者： Xiaohu Cao Xiangyu Zang Xichen Zhou mindong chen Yong Ding State Key Laboratory of Applied Organic Chemistry Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province College of Chemistry and Chemical Engineering Lanzhou University Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC) Nanjing University of Information Science & Technology

Photoelectrocatalytic water splitting is an effective way to utilize the solar energy to solve the energy shortage. The valence band edge of WO3 located at 3V vs. normal hydrogen electrode（NHE）, which can offer enough potential to kinetically oxidize water for oxygen evolution reaction. However, water oxidation reaction kinetics is sluggish when only WO3 is used as the photoanode. It is highly desirable to use cocatalyst to promote the kinetics. Mn Oxloaded on the WO3 photoanode through photodeposition methods improves the photoelectrochemical water oxidation performance. A maximum photocurrent density of composite photoanode is achieved with a deposition time of 3 min, which is higher than that of pristine WO3 photoanode around 40%. Mn O2 is not only a cocatalyst for water splitting but also for improving oxidation selectivity. We tried to use two means to load Mn Oxon WO3 photoanode material. It is observed that loading a moderate amount of Mn Oxon the WO3 by photodeposition can promote the performance of the WO3 photoanode.

关键词： Photoelectrochemical water oxidation Tungsten oxide Manganese oxide Photodeposition Hydrothermal method

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Gravimetric analysis for PM_(2.5) mass concentration based on year-round monitoring at an urban site in Beijing

引用

Journal of Environmental Sciences 2016年第2期28卷 154-160页

作者： Yanli Wang Wen Yang Bin Han Wenjie Zhang mindong chen Zhipeng Bai State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Nanjing University of Information Science & Technology

Daily PM_（2.5）（particulate matter with an aerodynamic diameter of below 2.5 μm） mass concentrations were measured by gravimetric analysis in Chinese Research Academy of Environmental Sciences（CRAES）, in the northern part of the Beijing urban area, from December 2013 to April 2015. Two pairs of Teflon（T1/T2） and Quartz（Q1/Q2） samples were obtained, for a total number of 1352 valid filters. Results showed elevated pollution in Beijing,with an annual mean PM_（2.5）mass concentration of 102 μg/m^3. According to the calculated PM_（2.5）mass concentration, 50% of our sampling days were acceptable（PM_（2.5）〈 75 μg/m^3）, 30% had slight/medium pollution（75–150 μg/m^3）, and 7% had severe pollution（〉 250 μg/m^3）. Sampling interruption occurred frequently for the Teflon filter group（75%） in severe pollution periods,resulting in important data being missing. Further analysis showed that high PM_（2.5）combined with high relative humidity（RH） gave rise to the interruptions. The seasonal variation of PM_（2.5）was presented, with higher monthly average mass concentrations in winter（peak value in February, 422 μg/m^3）, and lower in summer（7 μg/m^3 in June）. From May to August, the typical summer period, least severe pollution events were observed, with high precipitation levels accelerating the process of wet deposition to remove PM_（2.5）. The case of February presented the most serious pollution, with monthly averaged PM_（2.5）of 181 μg/m^3 and 32% of days with severe pollution. The abundance of PM_（2.5）in winter could be related to increased coal consumption for heating needs.

关键词： PM_(2.5) Gravimetric analysis Sampling interruption Pollution level Relative humidity(RH) Seasonal variation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Application of MnCeO_(x)supported on palygorskite and Al(OH)_(3)for HCHO oxidation:Catalytic performance and stability

引用

Journal of Rare Earths 2022年第12期40卷 1860-1869,I0002页

作者： Qiong Huang Lirui Xu Yao Xiao Jie Zhu Guofang An Peiyang Li Bo Yang mindong chen Hong Yang Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technologies Jiangsu Key Laboratory of Atmospheric Environmental Monitoring&Pollution ControlSchool of Environmental Science&EngineeringNanjing University of Information Science&TechnologyNanjing 210044China Department of Geography and Environmental Science University of ReadingWhiteknightsReadingRG66ABUK

Indoor formaldehyde(HCHO)is an important air pollutant,while it is very difficult to reduce HCHO to low-level(e.g.<0.08 mg/m^(3)).Catalytic oxidation at ambient temperature has been increasingly recognized as one of the important methods to mitigate HCHO pollution due to its good effectiveness,stability,and *** further improve the activity of catalytic oxidation,this study develops the integrated MnCeO_(x)catalysts supported on palygorskite(Pal)and aluminium hydroxide(Al(OH)_(3)).Our results indicate that the synergistic interaction in MnCeO_(x)through the oxygen transfer mechanism from the oxygen reservoir CeO_(2)to MnOxsignificantly improves the ***,Al(OH)_(3),*** applied as the supports with a focus on their dispersion,microstructure,strength,and relative ***_(x)can be anchored on the surface of Al(OH)_(3)with high *** the integrated catalyst,HCHO concentration decreases from 1.012 to 0.086 mg/m^(3)within 48 *** oxidation activity of MnCeO_(x)powder may be ascribed to the amount of active components on the *** incorporation of ZSM-5 and activated carbon can improve the adsorption of HCHO,and all integrated catalysts exhibit stronger activities,with HCHO being degraded to the level lower than 0.08 mg/m^(3).Meantime,the samples exhibit good stability and strength(20.2 MPa)without obvious decrease over five consecutive stability experiments.

关键词： MnCeOx Integrated catalysts Catalytic oxidation HCHO Ambient temperature Rare earths

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

An intensive study on aerosol optical properties and affecting factors in Nanjing,China

引用

Journal of Environmental Sciences 2016年第2期28卷 35-43页

作者： Fenping Cui mindong chen Yao Ma Jun Zheng Zhou Yaoyao Shizheng Li Lu Qi Li Wang Jiangsu Key Laboratory of Atmospheric Environment Monitoring & Pollution Control Nanjing 210044China Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Nanjing 210044China School of Physics & Opto-electronic Engineering Nanjing University of Information Science & TechnologyNanjing 210044China School of Environmental Science and Engineering Nanjing University of Information Science & TechnologyNanjing 210044China

The optical properties of aerosol as well as their impacting factors were investigated at a suburb site in Nanjing during autumn from 14 to 28 November 2012. More severe pollution was found together with lower visibility. The average scattering and absorption coefficients（B sca and B abs） were 375.7 ± 209.5 and 41.6 ± 18.7 Mm^（-1）, respectively. Higher ？ngstr？m absorption and scattering exponents were attributed to the presence of more aged aerosol with smaller particles. Relative humidity（RH） was a key factor affecting aerosol extinction. High RH resulted in the impairment of visibility, with hygroscopic growth being independent of the dry extinction coefficient. The hygroscopic growth factor was 1.8 ± 1.2 with RH from 19% to 85%.Light absorption was enhanced by organic carbon（OC）, elemental carbon（EC） and EC coatings,with contributions of 26%, 44% and 75%（532 nm）, respectively. The B sca and B abs increased with increasing N_（100）（number concentration of PM_（2.5）with diameter above 100 nm）, PM_1 surface concentration and PM_（2.5）mass concentration with good correlation.

关键词： Aerosol optical properties Single scattering albedo Angstrom exponent Hygroscopic growth factor

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Synergetic catalytic removal of chlorobenzene and NOχfrom waste incineration exhaust over MnNb0.4Ce0.2Oχcatalysts:Performance and mechanism study

引用

Journal of Rare Earths 2020年第11期38卷 1178-1189,I0002页

作者： Bo Yang Qijie Jin Qiong Huang mindong chen Leilei Xu Yuesong Shen Haitao Xu Shemin Zhu Xiujun Li Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology(CICAEET) Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution ControlSchool of Environmental Science and EngineeringNanjing University of Information Science&TechnologyNanjing 210044China Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites College of Materials Science and EngineeringNanjing TechUniversityNanjing 210009China Department of Chemistry and Biochemistry Environmental Science&Engineeringand Biomedical EngineeringUniversity of Texas at EL PasoEL PasoTX 79968USA

Nb doped MnCe0.2Ox complex oxides catalysts prepared via a homogeneous precipitation method were investigated for synergistic catalytic removal of NOx and chlorobenzene(CB)at low *** MnNb0.4Ce0.2Ox catalyst with a molar ratio of Nb/Mn=0.4 exhibits excellent activity and the NOx and CB removal efficiency reaches 94.5%and 96%at 220℃,***,the NOx and CB removal efficiency of MnNb0.4Ce0.2Ox still remains above 80%after injecting 300 ppm SO2 and 7 vol%H2 O for 36 *** addition,the presence of CB and NOx+NH3 can improve the NOx and CB removal efficiency of MnNb0.4Ce0.2Ox,*** analysis results from N2-BET,Py-IR,H2-TPR and NH3-TPD reveal that the introduction of Nb increases the average pore size,pore volume and surface area,promoted the growth of Lewis acid amount obviously,and enhances redox ability of MnCe0.2Ox at 100-250℃.Moreover,the molecular migration process of NOx,NH3,CB and SO2 in NH3-SCR and CB oxidation reaction over MnNb0.4Ce0.2Ox catalysts were systematically *** situ DRIFTS,FT-IR and XPS also confirm that the adsorption of sulfate species and SO2 on the surface of MnNb0.4Ce0.2Ox is inhibited effectively by the introduction of Nb in the presence of SO2 and H2 ***,Nb additives also enhance the structural stability of MnNb0.4Ce0.2Ox,due to the interactions among Mn,Nb and *** NH3-TPD,H2-TPR and in situ DRIFTS results also confirm that the MnNb0.4Ce0.2Ox still retains abundant acid sites and high redox ability in the presence of SO2 and *** summary,MnNb0.4Ce0.2Ox catalysts represent a promising and effective candidate for controlling NOx and CB at low temperatures.

关键词： Synergistic catalytic removal Nitrogen oxides(NOx) Chlorobenzene(CB) Hydrothermal stability Removal mechanism Rare earths

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Characteristics of atmospheric single particles during haze periods in a typical urban area of Beijing：A case study in October,2014

引用

Journal of Environmental Sciences 2016年第2期28卷 145-153页

作者： Lang Liu Yanli Wang Shiyong Du Wenjie Zhang Lujian Hou Sverre Vedal Bin Han Wen Yang mindong chen Zhipeng Bai State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012 China Environmental Protection Science Research Institute of Ji'nan Ji'nan 250014 China Department of Environmental and Occupational Health Sciences University of Washington Seattle WA USA Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Nanjing University of Information Science &Technology Nanjing 210044 China

To investigate the composition and possible sources of particles, especially during heavy haze pollution, a single particle aerosol mass spectrometer（SPAMS） was deployed to measure the changes of single particle species and sizes during October of 2014, in Beijing. A total of 2,871,431 particles with both positive and negative spectra were collected and characterized in combination with the adaptive resonance theory neural network algorithm（ART-2a）. Eight types of particles were classified： dust particles（dust, 8.1%）, elemental carbon（EC, 29.0%）, organic carbon（OC, 18.0%）, EC and OC combined particles（ECOC, 9.5%）,Na-K containing particles（Na K, 7.9%）, K-containing particles（K, 21.8%）, organic nitrogen and potassium containing particles（KCN, 2.3%）, and metal-containing particles（metal,3.6%）. Three haze pollution events（P1, P2, P3） and one clean period（clean） were analyzed,based on the mass and number concentration of PM_（2.5）and the back trajectory results from the hybrid single particle Lagrangian integrated trajectory model（Hysplit-4 model）. Results showed that EC, OC and K were the major components of single particles during the three haze pollution periods, which showed clearly increased ratios compared with those in the clean period. Results from the mixing state of secondary species of different types of particles showed that sulfate and nitrate were more readily mixed with carbon-containing particles during haze pollution episodes than in clean periods.

关键词： Single particle mass spectrometry Haze pollution Mixing state

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Water oxidation catalytic ability of polypyridine complex containing a μ-OH, μ-O_2 dicobalt(iii) core

引用

Chinese Journal of Catalysis 2018年第3期39卷 463-471页

作者： Junqi Lin Baochun Ma mindong chen Yong Ding State Key Laboratory of Applied Organic Chemistry Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 Gansu China Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control (AEMPC) Nanjing University of Information Science & Technology Nanjing 210044 Jiangsu China

Two polypyridine complexes containingμ‐OH,μ‐O2dicobalt(III)cores,[(TPA)CoIII(μ‐OH)(μ‐O2)CoIII(TPA)](ClO4)3and[(BPMEN)CoIII(μ‐OH)(μ‐O2)CoIII(BPMEN)](ClO4)3(TPA=tris(2‐pyridylmethyl)amine,BPMEN=N,N′‐dimethyl‐N,N′‐bis(pyridin‐2‐ylmethyl)ethane‐1,2‐diamine),have previously been reported as inactive in the light‐driven water oxidation reaction(ACS Catal.,2016,6,5062?5068).Herein,another dicobalt(III)compound,μ‐OH,μ‐O2‐[{(enN4)2Co2}](ClO4)3(enN4=1,6‐bis(2‐pyridyl‐2,5‐diazaocta‐2,6‐diene),with a similar core structure was synthesized,characterized,and applied to the light‐driven water oxidation *** experiments showed that the complex itself was also inactive in the light‐driven water oxidation,and that the activity observed originated from Co(II)*** research establishes that complexes possessing aμ‐OH,μ‐O2dicobalt(III)core structure are not appropriate choices for true molecular catalysts ofwater oxidation.

关键词： Water oxidation Photocatalysis Catalytic ability Cobalt oxide Complex

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Facile synthesis and photocatalytic activity of Ag3PO4 tetrapods

Facile synthesis and photocatalytic activity of Ag3PO4 tetra...

引用

第十三届全国太阳能光化学与光催化学术会议

作者： Jun Wang mindong chen 滕飞 Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control School of Environmental Sciences and EngineeringNanjing University of Information Sciences and Engineering

Developing visable light response photocatalysts is highly desirable for photocatalysis ***,silver orthophosphate(AgPO) is reported to have much higher dagradation activity than the other visible light *** performance... 详细信息

关键词： Ag3PO4 Tetrapods Polyhydrons Photocatalysis

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：