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39篇 您的检索式:作者名="Wenpo"
    题名 作者 年代 出处 被引量
1Adsorption behavior of phosphate on Lanthanum(Ⅲ) doped mesoporous silicates material显示文摘A series of lanthanum doped meosoporous MCM-41(LaxM41,x is Si/La molar ratio) was prepared by sol-gel method.The surface structure of the materials was investigated with X-ray diffraction and N2 adsorption/desorption technique.The content of La in the materials was determined by ICP.It was found that the La content of La25M41,La50M41 and La100M41 was 7.53%,3.89% and 2.32%,respectively.The phosphate adsorption capacities increased with increasing amount of La incorporation.With 0.40 g La25M41 99.7% phosphate could be removed.The effects of Si/La molar ratio,LaxM41 dose,pH,initial concentration of phosphate solution,co-ions on phosphate adsorption were also evaluated.The phosphate adsorption kinetics of LaxM41 could be well-described by the pseudo second-order model,and Langmuir isotherm fit equilibrium data much better than the Freundlich isotherm.Jianda Zhang Zhemin Shen Wenpo Shan Ziyan Chen Zhijian Mei Yangming Lei Wenhua Wang 2010Journal of Environmental Sciences2010,22,4:18
2Selective catalytic reduction of NO_(x) with NH_(3):opportunities and challenges of Cu-based small-pore zeolites显示文摘Zeolites,as efficient and stable catalysts,are widely used in the environmental catalysis field.Typically,Cu-SSZ-13 with small-pore structure shows excellent catalytic activity for selective catalytic reduction of NO_(x) with ammonia(NH_(3)-SCR)as well as high hydrothermal stability.This review summarizes major advances in Cu-SSZ-13 applied to the NH_(3)-SCR reaction,including the state of copper species,standard and fast SCR reaction mechanism,hydrothermal deactivation mechanism,poisoning resistance and synthetic methodology.The review gives a valuable summary of new insights into the matching between SCR catalyst design principles and the characteristics of Cu^(2+)-exchanged zeolitic catalysts,highlighting the significant opportunity presented by zeolite-based catalysts.Principles for designing zeolites with excellent NH_(3)-SCR performance and hydrothermal stability are proposed.On the basis of these principles,more hydrothermally stable Cu-AEI and Cu-LTA zeolites are elaborated as well as other alternative zeolites applied to NH_(3)-SCR.Finally,we call attention to the challenges facing Cu-based small-pore zeolites that still need to be addressed.Yulong Shan Jinpeng Du Yan Zhang Wenpo Shan Xiaoyan Shi Yunbo Yu Runduo Zhang Xiangju Meng Feng-Shou Xiao Hong He 2021National Science Review2021,8,10:9
3The balance of acidity and redox capability over modified CeO_2 catalyst for the selective catalytic reduction of NO with NH_3显示文摘The effect of acidity and redox capability over sulfuric acid-modified CeO_2 catalysts were studied for the selective catalytic reduction of NO_x with NH_3(NH_3-SCR). The deposition of sulfate significantly enhanced the catalytic performance over CeO_2. NO_x conversion over4H_2SO_4/CeO_2 at 230–440 °C was higher than 90%. The strong redox capability of CeO_2 could result in unselective NH_3 oxidation and decrease high temperatures catalytic activity and N_2 selectivity. The deposition of sulfate increased the acidity and weakened the redox capability, and then increased the high temperature NO_x conversion and N_2 selectivity. An appropriate level of acidity also promoted the activity at 190–250 °C over ceria-based catalysts, and with further increase in the acidity, the SCR activity decreased slightly. Weak redox capability lowered the low-temperature catalytic activity. Excellent SCR activity requires a balance of acidity and redox capability on the catalysts.Zhihua Lian Wenpo Shan Meng Wang Hong He Qingcai Feng 2019Journal of Environmental Sciences2019,31,5:6
4Investigation of suitable precursors for manganese oxide catalysts in ethyl acetate oxidation显示文摘The control of ethyl acetate emissions from fermentation and extraction processes in the pharmaceutical industry is of great importance to the environment.We have developed three Mn_(2)O_(3)catalysts by using different Mn precursors(MnCl_(2),Mn(CH_(3)COO)_(2),MnSO_(4)),named as Mn_(2)O_(3)-Cl,-Ac,-SO_(4).The tested catalytic activity results showed a sequence with Mn precursors as:Mn_(2)O_(3)-Cl>Mn_(2)O_(3)-Ac>Mn_(2)O_(3)-SO_(4).The Mn_(2)O_(3)-Cl catalyst reached a complete ethyl acetate conversion at 212℃(75℃lower than that of Mn_(2)O_(3)-SO_(4)),and this high activity 100%could be maintained high at 212℃for at least 100 hr.The characterization data about the physical properties of catalysts did not show an obvious correlation between the structure and morphology of Mn_(2)O_(3)catalysts and catalytic performance,neither was the surface area the determining factor for catalytic activity in the ethyl acetate oxidation.Here we firstly found there is a close linear relationship between the catalytic activity and the amount of lattice oxygen species in the ethyl acetate oxidation,indicating that lattice oxygen species were essential for excellent catalytic activity.Through H_(2)temperature-programmed reduction(H_(2)-TPR)results,we found that the lowest initial reduction temperature over the Mn_(2)O_(3)-Cl had stronger oxygen mobility,thus more oxygen species participated in the oxidation reaction,resulting in the highest catalytic performance.With convenient preparation,high efficiency,and stability,Mn_(2)O_(3)prepared with MnCl_(2)will be a promising catalyst for removing ethyl acetate in practical application.Yan Zhang Meng Wang Shunyu Kang Tingting Pan Hua Deng Wenpo Shan Hong He 2021Journal of Environmental Sciences2021,33,6:2
5Multiscale ApEn and SampEn in Quantifying Nonlinear Complexity of Depressed MEG显示文摘Depression is a neurophysiological disorder with recurrent dysregulations of self-mental states.Multiscale Approximate entropy(ApEn)and Sample entropy(SampEn)are employed to characterize nonlinear complexity of Magnetoencephalography(MEG)of depressive patients in our contribution.SampEn shares similarities with ApEn while has better distinctions between the MEGs of depression patients and normal people.Test results prove that nonlinear complexity of the depressive MEG is lower than that of the normal subjects,indicating weaker response of depression patients to emotional stimuli,and the optimum discriminations between the depressive and healthy people lie in frontal lobe of brain which is related to emotional regulation.Our findings provide valuable information about depression,highlight the loss of nonlinear complexity in MEG of depressive patient and can be used as clinical diagnostic aids.YAO Wenpo HU Hui WANG Jun YAN Wei LI Jin HOU Fengzhen 2019Chinese Journal of Electronics2019,28,4:2
6Improving S/N ratio for pre-stack seismic data from western China显示文摘从西方的中国的地震数据是很吵闹的。二个主要原因是静态的修正和低 S/N 比率问题。由地震数据处理和学习,这些问题被重申有效地解决了静态的修正并且改进 S/N 比率为预先叠地震数据。许多其他的失真的抑制和消除也被实现了。由于 S/N 比率被改进的事实,地震数据的分辨率也被改进。Guo Ping Zhang Wenpo Gao Yan Zhao Jun Gao Shumei 2007Applied Geophysics2007,4,3:2
7Hydrolysis characteristic of polyferric sulfate coagulant and its optimal condition of preparation 显示文摘Cheng Wenpo 2001Colloids and Surfaces A : Physicochem Eng Aspects2001,182,13:1
8Influence of calcination temperature on iron titanate catalyst for the selective catalytic reduction of NO x with NH 3显示文摘Fudong Liu Kiyotaka Asakura Hong He Yongchun Liu Wenpo Shan Xiaoyan Shi Changbin Zhang 2010Catalysis Today2010,,1:1
9Characterization of Average Molecular Structure of Heavy Oil Fractions by ~1H Nuclear Magnetic Resonance and X-ray Diffraction显示文摘The chemical structure of heavy oil fractions obtained by liquid-solid adsorption chromatography was character-ized by 1 H nuclear magnetic resonance and X-ray diffraction.The molecular weight and molecular formula of asphaltene molecules were estimated by combining 1 H nuclear magnetic resonance and X-ray diffraction analyses,and were also ob-tained from vapor pressure osmometry and elemental analysis.Heteroatoms,such as S,N,and O atoms,were considered in the construction of average molecular structure of heavy oils.Two important structural parameters were proposed,including the number of alkyl chain substituents to aromatic rings and the number of total rings with heteroatoms.Ultimately,the av-erage molecular structures of polycyclic aromatics,heavy resins and asphaltene molecules were constructed.The number of α-,β-,γ-,and aromatic hydrogen atoms of the constructed average molecular structures fits well with the number of hydro-gen atoms derived from the experimental spectral data.Ren Wenpo Yang Chaohe Shan Honghong 2011China Petroleum Processing & Petrochemical Technology2011,13,3:1
10Fuzzy Comprehensive Evaluation Method Applied in the Real Estate Investment Risks Research显示文摘Zhang ML(Zhang Minli) Yang Wp(Yang Wenpo) 2012Physics Procedia2012,,:1
11A meteorological analysis of ozone episodes using HYSPLIT model and surface data 显示文摘SHAN Wenpo YIN Yongquan LU Haixia 2009Atmospheric Research2009,93,4:1
12Novel cerium-tungsten mixed oxide catalyst for the selective catalytic reduction of NOx with NH3显示文摘SHAN Wenpo LIU Fudong HE Hong 2011Chemical Communications2011,47,1:1
13Adsorption behav- ior of phosphate on lanthanum( Ill ) -coordinated diamino-func- tionalized 3D hybrid mesoporous silicates material 显示文摘Zhang Jianda Shen Zhemin Shan Wenpo 2011Journal of Hazardous Materials2011,186,1:1
14A meteorological analysis of ozone episodes using HYSPLIT model and surface data显示文摘SHAN Wenpo YIN Yongquan LU Haixia 2009Atmos Res2009,93,:1
15Mechanism of N2O formation during the low-temperature selective catalytic reduction of NO with NH3 over Mn-Fe spinel 显示文摘Yang Shijian Xiong Shangchao Liao Yong Xiao Xin Qi Feihong Peng Yue Fu Yuwu Shan Wenpo Li Junhua 2014Environmental Science & Technology2014,48,10:1
16Observational study of surface ozone at an urban site in East China显示文摘SHAN Wenpo Y1N Yongquan ZHANG Jindi 2008Atmospheric Research2008,89,:1
17An approximation to the P-wave reflection coefficient for amplitude variation with long-offset seismic data显示文摘在最近的年里,长偏移量的探索广泛地被使用了,特别在海洋的地震调查上。常规 AVO 分析为长偏移量的地震数据是不够的。为了拓宽应用程序, AVO 分析变化,我们在场对长偏移量的数据适用的新 P 波浪思考系数近似。我们的结果类似于能被当作近似到我们短偏移量的地震数据的结果的众所周知的 Shuey 公式。Wang Pu Zhang Wenpo Hu Tianyue 2007Applied Geophysics2007,4,1:1
18Advances in emission control of diesel vehicles in China显示文摘Diesel vehicles have caused serious environmental problems in China.Hence,the Chinese government has launched serious actions against air pollution and imposed more stringent regulations on diesel vehicle emissions in the latest China VI standard.To fulfill this stringent legislation,two major technical routes,including the exhaust gas recirculation(EGR)and high-efficiency selective catalytic reduction(SCR)routes,have been developed for diesel engines.Moreover,complicated aftertreatment technologies have also been developed,including use of a diesel oxidation catalyst(DOC)for controlling carbon monoxide(CO)and hydrocarbon(HC)emissions,diesel particulate filter(DPF)for particle mass(PM)emission control,SCR for the control of NOx emission,and an ammonia slip catalyst(ASC)for the control of unreacted NH3.Due to the stringent requirements of the China VI standard,the aftertreatment system needs to be more deeply integrated with the engine system.In the future,aftertreatment technologies will need further upgrades to fulfill the requirements of the near-zero emission target for diesel vehicles.Guangyan Xu Wenpo Shan Yunbo Yu Yulong Shan Xiaodong Wu Ye Wu Shaojun Zhang Liqiang He Shijin Shuai Hailong Pang Xuefeng Jiang Heng Zhang Lei Guo Shufen Wang Feng-Shou Xiao Xiangju Meng Feng Wu Dongwei Yao Yan Ding Hang Yin Hong He 2023Journal of Environmental Sciences2023,,1:1
19Influence of eutrophication on the coagulation efficiency in reservoir water显示文摘CHENG Wenpo YU R F CHI C H 2003Chemosphere2003,53,7:1
20An environmentally-benign CeO 2 -TiO 2 catalyst for the selective catalytic reduction of NO x with NH 3 in simulated diesel exhaust显示文摘Wenpo Shan Fudong Liu Hong He Xiaoyan Shi Changbin Zhang 2011Catalysis Today2011,,1:1
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