|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Drag models for simulating gas–solid flow in the turbulent fluidization of FCC particles显示文摘This paper examines the suitability of various drag models for predicting the hydrodynamics of the turbulent fluidization of FCC particles on the Fluent V6.2 platform.The drag models included those of Syamlal–O’Brien,Gidaspow,modified Syamlal–O’Brien,and McKeen.Comparison between experimental data and simulated results showed that the Syamlal–O’Brien,Gidaspow,and modified Syamlal–O’Brien drag models highly overestimated gas–solid momentum exchange and could not predict the formation of dense phase in the fluidized bed,while the McKeen drag model could not capture the dilute charac- teristics due to underestimation of drag force.The standard Gidaspow drag model was then modified by adopting the effective particle cluster diameter to account for particle clusters,which was,however, proved inapplicable for FCC particle turbulent fluidization.A four-zone drag model(dense phase,subdense phase,sub-dilute phase and dilute phase)was finally proposed to calculate the gas–solid exchange coefficient in the turbulent fluidization of FCC particles,and was validated by satisfactory agreement between prediction and experiment. | Peng Li Xingying Lan Chunming Xu Gang Wang Chunxi Lu Jinsen Gao | 2009 | Particuology2009，7，4： | 13 |
| 2 | The catalytic behavior of La-Mn-O nanoparticle perovskite-type oxide catalysts for the combustion of the soot particle from the diesel engine显示文摘The La1?xMx MnO3(M=Li, Na, K, Rb, x=0, 0.10, 0.25) perovskite-type oxides whose sizes are nanoparticle have been prepared by the citric acid-ligated method. The characters of the catalysts were characterized by means of XRD, IR, SEM and BET surface area measurement. The catalytic activity for the combustion of soot particulate was evaluated by a technique of the temperature-programmed reaction. In the LaMnO3 catalyst, the partial substitution of alkali metal (Li, Na, K, Rb) into A-site enhanced the catalytic activity for the combustion of soot particle. The La0.75K0.25MnO3 oxides are good candidate catalysts for the soot particle removal reaction, and the combustion tem- peratures of soot particle are between 285℃ and 430℃ when the contact of catalysts and soot is loose, and their catalytic activities for the combustion of soot particle are as good as supported Pt catalysts, which is the best catalyst system so far reported for soot combustion under loose con- tact conditions. | WANG Hong ZHAO Zhen XU Chunming LIU Jian LU Zhixiao | 2005 | Chinese Science Bulletin2005，50，14： | 10 |
| 3 | Origin and Geodynamic Implications of Concealed Granite in Shadong Tungsten Deposit, Xinjiang, China: Zircon U-Pb Chronology, Geochemistry, and Sr-Nd-Hf Isotope Constraint显示文摘Shadong deposit is the first large-scale tungsten deposit found in the East Tianshan orogenic belt, and the geologic characteristics of the deposit indicate that the deeply concealed granite body is genetically related with the mineralization. The LA-ICPMS U-Pb age of zircons from the Shadong concealed granite obtained in this research is 239±2.0 Ma, belonging to the Middle Triassic. The whole rock samples are metaluminous to slightly peraluminous(A/CNK=0.95–1.02) with low contents of SiO_2(64.0 wt.%–68.5 wt.%) and low K_2 O/Na_2 O ratios(0.73–0.96). The samples reveal enrichment of K, Rb, Th and depletion of Nb, Ta, P, Ti and have a negative slope from La to Lu(La_N/Yb_N=16.29–36.8) with weak negative Eu anomaly(Eu/Eu~*= 0.71–0.82). Initial ^(87) Sr/^(86) Sr ratios of whole rock range of 0.706 59–0.707 75, ε_(Nd)(t) values range from-1.77 to-2.53 and ε_(Hf)(t) values of zircon are between 2.54 and 4.90. The lithogeochemistry and Sr-Nd-Hf isotopic characteristics revealed that the concealed granite in Shadong tungsten deposit is I-type granite, and occurs in an intraplate tectonic setting. The magma mixing during intraplating of mantle derived magma intruding into the crust in Indosinian Period is the major formation mechanism of the granite.Of which, the proportion of mantle derived magma ranges from 58% to 60%, and the crustal materials are mainly the metamorphic basement of Xingxingxia Group of Mesoproterozoic Changcheng System, which may provide the main source of ore forming metals of Shadong tungsten deposit. | Chao Chen Xinbiao Lu Chunming Wu Xiao Jiang Chen Mao | 2018 | Journal of Earth Science2018，29，1： | 8 |
| 4 | Experimental and computational studies on flow behavior of gas-solid fluidized bed with disparately sized binary particles显示文摘This paper presents experimental and computational studies on the flow behavior of a gas-solid fluidized bed with disparately sized binary particle mixtures.The mixing/segregation behavior and segregation efficiency of the small and large particles are investigated experimentally.Particle composition and operating conditions that influence the fluidization behavior of mixing/segregation are examined.Based on the granular kinetics theory,a multi-fluid CFD model has been developed and verified against the experimental results.The simulation results are in reasonable agreement with experimental data.The results showed that the smaller particles are found near the bed surface while the larger particles tend to settle down to the bed bottom in turbulent fluidized bed.However,complete segregation of the binary particles does not occur in the gas velocity range of 0.695-0.904 m/s.Segregation efficiency increases with increasing gas velocity and mean residence time of the binary particles,but decreases with increasing the small particle concentration.The calculated results also show that the small particles move downward in the wall region and upward in the core.Due to the effect of large particles on the movement of small particles,the small particles present a more turbulent velocity profile in the dense phase than that in the dilute phase. | Jinsen Gao Jian Chang Chunxi Lu Chunming Xu | 2008 | Particuology2008，6，2： | 7 |
| 5 | Mechanism of vertical crack formation in Yb_(2)SiO_(5) coatings deposited via plasma spray-physical vapor deposition显示文摘Plasma spray-physical vapor deposition(i.e.,PS-PVD)is a promising method for obtaining advanced environmental barrier coatings(EBCs).The EBCs must meet some requirements in the application,in which the thermal cycle performance affects the service lifetime.The preparation of artificial vertical cracks in Yb_(2)SiO_(5) coatings is an effective approach for meeting the requirements above because vertical cracks provide a strain tolerance.To clarify the formation mechanism of vertical cracks during the PSPVD,the effects of coating thickness and substrate temperature on the formation of vertical cracks were investigated.In addition,the interactions of spray powder and plasma flame during coating deposition were also characterized by optical spectroscopy.It is indicated that vertical cracks are formed due to a thermal expansion mismatch between Yb_(2)SiO_(5) and mullite coating,transient cooling after deposition and the nucleation of evaporated Yb_(2)SiO_(5) as well. | Xiaofeng Zhang Chao Wang Ruijun Ye Chunming Deng Xinghua Liang Ziqian Deng Shaopeng Niu Jinbing Song Guo Liu Min Liu Kesong Zhou Jian Lu Junli Feng | 2020 | Journal of Materiomics2020，6，1： | 6 |
| 6 | The effect of slight to minor biodegradation on C_6 to C_7 light hydrocarbons in crude oils: a case study from Dawanqi Oilfield in the Tarim Basin,NW China显示文摘Light hydrocarbons(LHs) are one of the main petroleum fractions in crude oils, and carry much information regarding the genetic origin and alteration of crude oils. But secondary alterations—especially biodegradation—have a significant effect on the composition of LHs in crude oils. Because most of the LHs affected in oils underwent only slight biodegradation(rank 1 on the biodegradation scale), the variation of LHs can be used to describe more the refined features of biodegradation. Here,23 crude oils from the Dawanqi Oilfield in the Tarim Basin, NW China, eleven of which have been biodegraded to different extents, were analyzed in order to investigate the effect of slight to minor biodegradation on C_6–C_7 LHs.The study results showed that biodegradation resulted in the prior depletion of straight-chained alkanes, followed by branched alkanes. In slight and minor biodegraded oils,such biodegradation scale could not sufficiently affect C_6–C_7cycloalkanes. For branched C_6–C_7 alkanes, generally,monomethylalkanes are biodegraded earlier than dimethylalkanes and trimethylalkanes, which indicates that branched alkanes are more resistant to biodegradation, with the increase of substituted methyl groups on parent rings.The degree of alkylation is one of the primary controlling factors on the biodegradation of C_6–C_7 LHs. There is a particular case: although 2,2,3-trimethylbutane has a relative higher alkylation degree, 2,2-dimethylpentane is more resistant to biodegradation than 2,2,3-trimethylbutane. 2,2-Dimethylpentane is the most resistant to biodegradation in branched C_6–C_7 alkanes. Furthermore, the 2-methylpentane/3-methylpentane and 2-methylhexane/3-methylhexane ratios decreased steadily with increasing biodegradation,which implies that isomers of bilateral methyl groups are more prone to bacterial attack relative to mid-chain isomers. The position of the alkyls on the carbon skeleton is also one of the critical factors controlling the rate of biodegradation. With increasing biodegradation, Mango's LH parameters K1 values decrease and K2 values increase,the values of n-heptane and isoheptane decrease, and the indices of methylcyclohexane and cyclohexane increase.LH parameters should be applied cautiously for the biodegraded oils. Because biodegraded samples belong to slight or minor biodegraded oils, the values of n-heptane and isoheptane from Dawanqi Oilfield can better reflect and determine the ‘‘Biodegraded'' zone. When the heptane value is 0–21 and the isoheptane value is 0–2.6, the crude oil in Dawanqi Oilfield is defined as the ‘‘Biodegraded'' zone. | Lu Yang Chunming Zhang Meijun Li Jing Zhao Xuening Qi Jinxiu Du | 2016 | Acta Geochimica2016，35，2： | 5 |
| 7 | Effects of Calcination Temperature on the Acidity and Catalytic Performances of HZSM-5 Zeolite Catalysts for the Catalytic Cracking of n-Butane显示文摘The acidic modulations of a series of HZSM-5 catalysts were successfully made by calcination at different treatment temperatures, i.e. 500, 600, 650, 700 and 800 °C, respectively. The results indicated that the total acid amounts, their density and the amount of B-type acid of HZSM-5 catalysts rapidly decreased, while the amounts of L-type acid had almost no change and thus the ratio of L/B was obviously enhanced with the increase of calcination temperature (excluding 800 °C). The catalytic performances of modified HZSM-5 catalysts for the cracking of n-butane were also investigated. The main properties of these catalysts were characterized by means of XRD. N2 adsorption at low temperature, NH3-TPD, FT- IR of pyridine adsorption and BET surface area measurements. The results showed that HZSM-5 zeolite pretreated at 800 °C had very low catalytic activity for n-butane cracking. In the calcination temperature range of 500-700 °C, the total selectivity to olefins, propylene and butene were increased with the increase of calcination temperature, while, the selectivity for arene decreased with the calcination temperature. The HZSM-5 zeolite calcined at 700 °C produced light olefins with high yield, at the reaction temperature of 650 °C the yields of total olefins and ethylene were 52.8% and 29.4%, respectively. Besides, the more important role is that high calcination temperature treatment improved the duration stability of HZSM-5 zeolites. The effect of calcination temperature on the physico-chemical properties and catalytic performance of HZSM-5 for cracking of n-butane was explored. It was found that the calcination temperature had large effects on the surface area, crystallinity and acid properties of HZSM-5 catalyst, which further affected the catalytic performance for n-butane cracking. | Jiangyin Lu Zhen Zhao Chunming Xu Aijun Duan Pu Zhang | 2005 | Journal of Natural Gas Chemistry2005，14，4： | 3 |
| 8 | PVA/PEG Hybrid Hydrogels Prepared by Freeze-thawing and High Energy Electron Beam Irradiation显示文摘 | ZHAO Chunming LU Xueting HU Qianqian LIU Shuai GUAN Shuang | 2017 | Chemical Research in Chinese Universities2017，33，6： | 2 |
| 9 | Boosting of reversible capacity delivered at a low voltage below 0.5 V in mildly expanded graphitized needle coke anode for a high-energy lithium ion battery显示文摘The rate performance and cycle stability of graphitized needle coke(GNC)as anode are still limited by the sluggish kinetics and volume expansion during the Li ions intercalation and de-intercalation process.Especially,the output of energy density for lithium ion batteries(LIBs)is directly affected by the delithiation capacity below 0.5 V.Here,the mildly expanded graphitized needle coke(MEGNC)with the enlarged interlayer spacing from 0.346 to 0.352 nm is obtained by the two-step mild oxidation intercalation modification.The voltage plateau of MEGNC anode below 0.5 V is obviously broadened as compared to the initial GNC anode,contributing to the enhancement of Li storage below the low voltage plateau.Moreover,the coin full cell and pouch full cell configured with MEGNC anode exhibit much enhanced Li storage ability,energy density and better cycling stability than those full cells configured with GNC and commercial graphite anodes,demonstrating the practical application value of MEGNC.The superior anode behaviors of MEGNC including the increased effective capacity at low voltage and superior cyclic stability are mainly benefited from the enlarged interlayer spacing,which not only accelerates the Li ions diffusion rate,but also effectively alleviates the volume expansion and fragmentation during the Li ions intercalation process.In addition,the above result is further confirmed by the density functional theory simulation.This work provides an effective modification strategy for the NC-based graphite to enhance the delithiation capacity at a low voltage plateau,dedicated to improving the energy density and durability of LIBs. | Dong Sun Lu Zhao Zhihua Xiao Kai Zhao Rundan Lin Hongmei Song Xilu Zhang Xinlong Ma Chong Peng Xiaoqiao Huang Xingxun Li Jinsen Gao Chunming Xu | 2022 | Journal of Energy Chemistry2022，31，11： | 2 |
| 10 | Al- tered effective connectivity and anomalous anatomy in the basal ganglia thalamo- cortical circuit of stuttering speakers 显示文摘 | Chunming Lu Danling Peng Chuansheng Chen | 2010 | Cortex2010，46，1： | 1 |
| 11 | Across-sectional study of HIV and syphilis infectionsamong male students who have sex with men(MSM)innortheast China:implications for implementing HIVscreening and intervention programs显示文摘 | XUJunjie REILLY K H LU Chunming | 2011 | BMC PublicHealth2011，11，： | 1 |
| 12 | Plasma cell labeling index correlates with deletion of 13q14 in multiple myeloma显示文摘 | Chunming Li Lijuan Chen Xiao Gao Xiaoyan Qu Wenyi Shen Ruifang Yang Run Zhang Hairong Qiu Jiaren Xu Hua Lu Jianyong Li | 2011 | Leukemia & Lymphoma2011，，2： | 1 |
| 13 | Reactions of electron-deficient alkynes and allenes under phosphine catalysis显示文摘 | Lu Xiyan Zhang Chunming Xu Zhenrong | 2001 | Ace Chem Res2001，34，7： | 1 |
| 14 | FeHZSM-5 molecular sieves-Highly active catalysts for catalytic cracking of isobutane to produce ethylene and propylene显示文摘 | Lu Jiangyin Zhao Zhen Xu Chunming | 2006 | Catalysis Communications2006，7，： | 1 |
| 15 | Closing history of the southern Tianshan oceanic basin, western China: An oblique collisional orogeny显示文摘 | Chen Chunming Lu Huafu Jia Dong | 1999 | Tectonophysics1999，302，12： | 1 |
| 16 | FeHZSM-5 mo lecular sieves-Highly active catalysts for catalytic cracking of isobutane to produce ethylene and propylene显示文摘 | Lu Jiangyin Zhao Zhen Xu Chunming | 2006 | Catalysis Communications2006，7，4： | 1 |
| 17 | CrHZSM-5 zeo- lites Highly efficient catalysts for catalytic cracking of isobu-tane to produce light olefins显示文摘 | Lu Jiangyin Zhao Zhen Xu Chunming | 2006 | Catalysis Letters2006，109，12： | 1 |
| 18 | Ant colony optimization algorithm for fuzzy controller cesign and its FPGA implementation显示文摘 | Juang Chiafeng Lu Chunming Lo Chiang | 2008 | IEEE Transactions of Industrial Electronics2008，55，3： | 1 |
| 19 | Catalytic cracking of isobutene over HZSM - 5, FeHZSM - 5 and CrHZSM - 5 cata- lysts with different SiO2/Al2O3 ratios 显示文摘 | Lu Jiangyin Zhao Zhen Xu Chunming | 2008 | 15 ( 2 ) : 213 - 2202008，15，2： | 1 |
| 20 | Plasma cell labeling index correlates with deletion of 13q14 in multiple myeloma显示文摘 | Chunming Li Lijuan Chen Xiao Gao Xiaoyan Qu Wenyi Shen Ruifang Yang Run Zhang Hairong Qiu Jiaren Xu Hua Lu Jianyong Li | 2011 | Leukemia & Lymphoma2011，，2： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员