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| 1 | Model and Method of Debris Flow Risk Zoning Based on Momentum Analysis显示文摘A model of debris flow risk zoning is carried out with momentum analysis of debris flow. This model zones the debris flow inundation fan with density and velocity calculated by numerical simulation. The risk classification standard is determined according to the ultimate bearing capacities of different structures under impacting. And the ultimate bearing capacities are tested by impact failure experiment of destruction. Two structures typical in Chinese mountain towns, reinforced concrete frame construction and brickwork with concrete, are chosen in the experiment. The model makes debris flow risk zoning quantitative and the results comparable widely. The results differ much from that of other methods especially in the identification of medium and low risk zones. | WEI Fangqiang ZHANG Yu HU Kaiheng GAO Kechang | 2006 | Wuhan University Journal of Natural Sciences2006，11，4： | 5 |
| 2 | Studies on the structure and catalytic performance of Cu-Zn-Al catalyst prepared by liquid-phase preparation technology under different heat treatment atmosphere显示文摘Cu-Zn-Al slurry catalysts were prepared using a complete liquid-phase preparation technology under different heat treatment atmospheres.The catalysts were characterized using X-ray diffraction,X-ray photoelectron spectroscope,and N2 adsorption-desorption.Their application in the single-step synthesis of dimethyl ether from syngas was also investigated.The results indicate that the type of heat treatment atmosphere has an influence on the Cu species and the Cu0/Cu+ ratio on the catalyst surface.Moreover,the final Cu/Zn ratio on the catalyst surface is mainly dependent on the composition and reaction environment of the catalyst and less on the type of heat treatment atmosphere.The prepared catalysts can suppress sintering of active sites at high temperatures,and the type of heat treatment atmosphere mainly affects the capability of the catalyst for methanol synthesis.The catalysts perform best using N2 as the heat treatment atmosphere. | Zhihua Gao Wei Huang Lihua Yin Kechang Xie | 2010 | Journal of Natural Gas Chemistry2010，19，6： | 3 |
| 3 | Kinetics and mechanism of nitrobenzene degradation by hydroxyl radicals-based ozonation process enhanced by high gravity technology显示文摘This study investigated the indirect oxidation of nitrobenzene(NB)by hydroxyl radicals(·OH)in a rotating packed bed(RPB)using competitive kinetics method with p-nitrochlorobenzene as a reference compound.The rate constants of NB with·OH are calculated to be between(1.465±0.113)×10^(9)L/(mol·s)and(2.497±0.192)×10^(9)L/(mol·s).The experimental data are fitted by the modified Arrhenius equation,where the activation energy is 4877.74 J/mol,the order of NB concentration,rotation speed,and initial pH is 0.2425,0.1400 and 0.0167,respectively.The ozonation process of NB could be enhanced by RPB,which is especially effective for highly concentrated NB-containing waste-water under alkaline conditions.The high gravity technology can accelerate ozone mass transfer and self-decomposition of ozone to produce more·OH,resulting in an increase in the indirect oxidation rate of NB by·OH and consequently effective degradation of NB in wastewater. | Weizhou Jiao Shengjuan Shao Peizhen Yang Kechang Gao Youzhi Liu | 2021 | Frontiers of Chemical Science and Engineering2021，15，5： | 2 |
| 4 | Probability Forecast of Regional Landslide Based on Numerical Weather Forecast显示文摘The regional forecast of landslide is one of the key points of hazard mitigation. It is also a hot and difficult point in research field. To solve this problem has become urgent task along with Chinese economy fast development. This paper analyzes the principle of regional landslide forecast and the factors for forecasting. The method of a combination of Information Value Model and Extension Model has been put forward to be as the forecast model. Using new result of Numerical Weather Forecast Research and that combination model, we discuss the implementation feasibility of regional landslide forecast. Finally, with the help of Geographic Information System, an operation system for southwest of China landslide forecast has been developed. It can carry out regional landslide forecast daily and has been pilot run in NMC. Since this is the first time linking theoretical research with meteorological service, further works are needed to enhance it. | GAO Kechang WEI Fangqiang CUI Peng HU Kaiheng XU Jing ZHANG Guoping BI Baogu | 2006 | Wuhan University Journal of Natural Sciences2006，11，4： | 2 |
| 5 | Relationships between debris flows and earth surface factors in Southwest China显示文摘 | Fangqiang Wei Kechang Gao kaiheng Hu | 2008 | Environmental Geology2008，55，3： | 1 |
| 6 | Simultaneous Removal of COS and H_2S at Low Temperatures over Nanoparticle a-FeOOH Based Catalysts显示文摘Catalysts using α-FeOOH nanoparticles as the active ingredient were tested by a microreactor-chromatography assessing apparatus at atmospheric pressure between 25 and 60 ℃ with a gas hourly spacevelocity of 10,000 h-1, while the removal performance of H2S with catalysts was investigated using thethermal gravimetric method. The results show that the catalysts are highly active for COS hydrolysis atlow temperatures (≤60 ℃) and high gas hourly space velocity, and the highest activity can reach 100%. Thecatalyst is particularly stable for 12 h, and no deactivation is observed. Nanoparticle α-FeOOH preparedusing hydrated iron sulfate shows higher COS hydrolysis activity, and the optimum calcination temperaturefor the catalyst is 260 ℃. In addition, the catalysts can remove COS and H2S simultaneously, and 60 ℃ isfavorable for the removal of H2S. The compensation effect exists in nanoparticle-based catalysts. | Zhihua Gao, Chunhu Li, Kechang XieState Key Lab of C1 Chemistry and Technology, Institute of Coal Chemical Engineering, Taiyuan University of Technology,Taiyuan 030024, China | 2003 | Journal of Natural Gas Chemistry2003，12，1： | 1 |
| 7 | Kinetics of the direct reaction between ozone and phenol by high-gravity intensified heterogeneous catalytic ozonation显示文摘In this study,high-gravity intensified heterogeneous catalytic ozonation is utilized for treatment of phenol-containing wastewater,and the kinetics of the direct reaction between ozone and phenol in the presence of excess tertiary butanol(TBA)is investigated.It is revealed that the direct reaction between ozone and phenol in the rotating packed bed(RPB)follows the pseudo-first-order kinetics with a reaction rate constant higher than that in the conventional bubbling reactor(BR).Under different conditions of temperature,initial pH,high-gravity factor,and gaseous ozone concentration,the apparent reaction rate constant varies in the range of 0.0160–0.115 min-1.An empirical power-exponential model is established to characterize the effects of these parameters on the direct reaction between ozone and phenol by high-gravity intensified heterogeneous catalytic ozonation. | Kechang Gao Shengjuan Shao Zhixing Li Jiaxin Jing Weizhou Jiao Youzhi Liu | 2023 | Chinese Journal of Chemical Engineering2023，53，1： | 0 |
| 8 | High-gravity intensified iron-carbon micro-electrolysis for degradation of dinitrotoluene显示文摘The application of iron–carbon(Fe–C)micro-electrolysis to wastewater treatment is limited by the passivation potential of the Fe–C packing.In order to address this problem,high-gravity intensified Fe–C micro-electrolysis was proposed in this study for degradation of dinitrotoluene wastewater in a rotating packed bed(RPB)using commercial Fe–C particles as the packing.The effects of reaction time,high-gravity factor,liquid flow rate and initial solution pH were investigated.The degradation intermediates were determined by gas chromatography-mass spectrometry,and the possible degradation pathways of nitro compounds by Fe–C micro-electrolysis in RPB were also proposed.It is found that under optimal conditions,the removal rate of nitro compounds reaches 68.4%at 100 min.The removal rate is maintained at approximately 68%after 4 cycles in RPB,but it is decreased substantially from 57.9%to 36.8%in a stirred tank reactor.This is because RPB can increase the specific surface area and the renewal of the liquid–solid interface,and as a result the degradation efficiency of Fe–C micro-electrolysis is improved and the active sites on the Fe–C surface can be regenerated for continuous use.In conclusion,high-gravity intensified Fe–C micro-electrolysis can weaken the passivation of Fe–C particles and extend their service life. | Jiaxin Jing Weizhou Jiao Zhixing Li Kechang Gao Jingwen Zhang Gaomiao Ren Youzhi Liu | 2022 | Frontiers of Chemical Science and Engineering2022，16，11： | 0 |
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