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| 1 | Alkaline modification of ZSM-5 catalysts for methanol aromatization: The effect of the alkaline concentration显示文摘ZSM-5 催化剂的物理性质上并且在他们为到 aromatics 变换的甲醇的活动的碱的处理的效果被调查了。一个温和碱的处理(0.2 和 0.3 mol/L NaOH ) 在酸味上没有明显的效果在父母沸石创造了 mesopores。mesopores 的存在为 aromatics 给催化剂更长的一生和更高的选择。有 0.4 mol/L NaOH 的处理减少了 Br 的数字 ? nsted 酸地点由于 dealumination 和 desilication,它导致了更低的释放率。另外,更多的 mesopores 比与温和碱的处理被生产。作为结果,与 0.4 mol/L NaOH 对待的样品的一生是乘父母 ZSM-5 的的几乎五。有更高碱的集中(0.5 mol/L ) 的处理极大地减少了 Br 的数字 ? nsted 酸地点和导致不完全的甲醇变换的 micropores 的数字。当碱对待的催化剂与酸被洗时,一些孔被恢复,为 aromatics 的选择的细微增加被获得。 | Zhenhao Wei Tengfei Xia Minghui Liu Qingsheng Cao Yarong Xu Kake Zhu Xuedong Zhu | 2015 | Frontiers of Chemical Science and Engineering2015，9，4： | 18 |
| 2 | Vertical Migration of Fine-Grained Sediments from Interior to Surface of Seabed Driven by Seepage Flows–‘Sub-Bottom Sediment Pump Action'显示文摘A scientific hypothesis is proposed and preliminarily verified in this paper: under the driving of seepage flows, there might be a vertical migration of fine-grained soil particles from interior to surface of seabed, which is defined as ‘sub-bottom sediment pump action' in this paper. Field experiments were performed twice on the intertidal flat of the Yellow River delta to study this process via both trapping the pumped materials and recording the pore pressures in the substrate. Experimental results are quite interesting as we did observe yellow slurry which is mainly composed of fine-grained soil particles appearing on the seabed surface; seepage gradients were also detected in the intertidal flat, under the action of tides and small wind waves. Preliminary conclusions are that ‘sediment pump' occurs when seepage force exceeds a certain threshold: firstly, it is big enough to disconnect the soil particles from the soil skeleton; secondly, the degree of seabed fluidization or bioturbation is big enough to provide preferred paths for the detached materials to migrate upwards. Then they would be firstly pumped from interior to the surface of seabed and then easily re-suspended into overlying water column. Influential factors of ‘sediment pump' are determined as hydrodynamics(wave energy), degree of consolidation, index of bioturbation(permeability) and content of fine-grained materials(sedimentary age). This new perspective of ‘sediment pump' may provide some implications for the mechanism interpretation of several unclear geological phenomena in the Yellow River delta area. | ZHANG Shaotong JIA Yonggang WEN Mingzheng WANG Zhenhao Zhang Yaqi ZHU Chaoqi Li Bowen LIU Xiaolei | 2017 | Journal of Ocean University of China2017，16，1： | 8 |
| 3 | Dynamics of Bottom Boundary Layers in the Yellow River Subaqueous Delta Based on Long-Term In-Situ Observations显示文摘Objective In geo-marine science,the generalized bottom boundary layer(BBL)represents a layer between sediments and seawater.The BBL plays an important role in geological,geobiochemical,geophysical and geotechnical research because it is the connection region of hydrosphere, | ZHU Chaoqi JIA Yonggang WANG Zhenhao GUO Lei SHAN Hongxian LIU Xiaolei ZHANG Minsheng | 2017 | Acta Geologica Sinica(English Edition)2017，91，1： | 8 |
| 4 | Wave flume experiments on the contribution of seabed fluidization to sediment resuspension显示文摘Sediment resuspension is commonly assumed to be eroded from the seabed surface by an excess bottom shear stress and evolves in layers from the top down. Although considerable investigations have argued the importance of wave-induced seabed fluidization in affecting the sediment resuspension, few studies have been able to reliably evaluate its quantitative contribution till now. Attempt is made to preliminarily quantify the contribution of fluidization to resuspension using a series of large-scale wave flume experiments. The experimental results indicated that fluidization of the sandy silts of the Huanghe Delta account for 52.5% and 66.8% of the total resuspension under model scales of 4/20 and 6/20(i.e., relative water depth: the ratio of wave height to water depth), respectively. Some previously reported results obtained using the same flume and sediments are also summarized for a contrastive analysis, through which not only the positive correlation is confirmed, but also a parametric equation for depicting the relationship between the contribution of fluidization and the model scale is established. Finally, the contribution of fluidization is attributed to two physical mechanisms:(1) an attenuation of the erosion resistance of fluidized sediments in surface layers due to the disappearing of original cohesion and the uplifting effect resulting from upward seepage flows, and(2) seepage pumping of fines from the interior to the surface of fluidized seabed. | ZHANG Shaotong JIA Yonggang WANG Zhenhao WEN Mingzheng LU Fang ZHANG Yaqi LIU Xiaolei SHAN Hongxian | 2018 | Acta Oceanologica Sinica2018，37，3： | 6 |
| 5 | Experiment and simulation of foaming injection molding of polypropylene/nano-calcium carbonate composites by supercritical carbon dioxide显示文摘Microcellular injection molding of neat isotactic polypropylene(iPP) and isotactic polypropylene/nano-calcium carbonate composites(i PP/nano-CaCO_3) was performed using supercritical carbon dioxide as the physical blowing agent. The influences of filler content and operating conditions on microstructure morphology of i PP and i PP/nano-CaCO_3 microcellular samples were studied systematically. The results showed the bubble size of the microcellular samples could be effectively decreased while the cell density increased for i PP/nano-CaCO_3 composites, especially at high CO_2 concentration and back pressure, low mold temperature and injection speed, and high filler content. Then Moldex 3D was applied to simulate the microcellular injection molding process, with the application of the measured ScCO_2 solubility and diffusion data for i PP and i PP/nano-Ca CO_3 composites respectively. For neat i PP, the simulated bubble size and density distribution in the center section of tensile bars showed a good agreement with the experimental values. However, for i PP/nano-CaCO_3 composites, the correction factor for nucleation activation energy F and the pre-exponential factor of nucleation rate f_0 were obtained by nonlinear regression on the experimental bubble size and density distribution. The parameters F and f_0 can be used to predict the microcellular injection molding process for i PP/nano-CaCO_3 composites by Moldex 3D. | Zhenhao Xi Jie Chen Tao Liu Ling Zhao Lih-Sheng Turng | 2016 | Chinese Journal of Chemical Engineering2016，24，1： | 4 |
| 6 | A grouting simulation method for quick-setting slurry in karst conduit:The sequential flow and solidification method显示文摘It is difficult to temporally and spatially track and characterize the slurry viscosity in flowing water during grouting simulation.In this study,a sequential flow and solidification(SFS)method considering the spatial-temporal evolution of slurry viscosity in flowing water in karst conduit is proposed.First,a time-dependent model for the threshold function of slurry viscosity is established.During the grouting process,the spatial-temporal evolution of slurry viscosity is revealed by tracking the diffusion behavior of the slurry injected at different times.This method is capable of describing the gradual solidification process of the slurry during grouting.Furthermore,a physical model of grouting in a karst conduit is developed.Second,the effectiveness of the SFS method in grouting simulation is verified by the experiment of grouting conduit in flowing water.The SFS method enables real-time monitoring of fluid velocity and pressure during grouting in flowing water and provides a feasible calculation method for revealing the grouting plugging mechanism in complex karst conduits at different engineering scales.In addition,it can be used to guide the design of grouting tests in flowing water,improve cost efficiency,and provide theoretical basis for optimizing grouting design and slurry selection. | Zhenhao Xu Dongdong Pan Shucai Li Yichi Zhang Zehua Bu Jie Liu | 2022 | Journal of Rock Mechanics and Geotechnical Engineering2022，14，2： | 3 |
| 7 | High-efficiency acetaldehyde removal during solid-state polycondensation of poly(ethylene terephthalate) assisted by supercritical carbon dioxide显示文摘The concentration of acetaldehyde(AA) is the main quality index of poly(ethylene terephthalate)(PET) used in food and drink packaging.A new method for AA removal has been developed by using supercritical carbon dioxide(sc CO2) during the solid-state polycondensation of PET.The influence factors of AA removal including the temperature,pressure,reaction time and the size of pre-polymer particles are systematically studied in this work.The results indicate that it is a highly efficient way to obtain high molecular weight PET with relative low concentration of AA.Correspondingly,the polymerization degree of PET could increase from 27.9 to 85.6 while the concentration of AA reduces from 0.229 × 10^(-6) to 0.055 × 10^(-6) under the optimal operation conditions of 230 °C,8 MPa and size of 0.30–0.45 mm.Thermodynamic performance tests show the increasing extent of PET crystallinity due to the fact that the plasticization of sc CO_2 is not obvious with extended reaction time,therefore the increasing crystallinity has no significant influence on AA removal.SEM observations reveal that the effects of sc CO_(2-) induced plasticization and swelling on PET increase significantly with the decrease of prepolymer size,and the surface of PET becomes more loose and porous in favor of the AA removal. | Zhenhao Xi Tian Liu Wei Si Fenglei Bi Zhimei Xu Ling Zhao | 2018 | Chinese Journal of Chemical Engineering2018，26，6： | 2 |
| 8 | Preparation and surface modification of PVDF-carbon felt composite bipolar plates for vanadium flow battery显示文摘The performance of vanadium flow batteries(VFBs) is closely related to the materials used in the bipolar plates. Carbon-based composite bipolar plates are particularly suitable for VFB applications. However,most original preparation methods cannot simultaneously achieve good electrical conductivity and mechanical performance. In this paper, we propose a novel approach to fabricating bipolar plates with carbon plastic materials, including four steps, namely coating a poly(vinylidene fluoride)(PVDF) solution onto carbon felt, solvent evaporation, hot-pressing, and surface modification. The resulting bipolar plates showed high conductivity, good mechanical strength, and corrosion resistance. Surface modification by coating with carbon nanotubes(CNTs) removed the PVDF-rich layer from the surface of the carbon fibers.The high surface area of the CNT withdrew PVDF resin from the carbon fiber surface, and promoted the formation of a conductive network. The flexibility and battery charge-discharge cycle measurements showed that the composite bipolar plates can meet requirements for VFB applications. | Zhenhao Liu Baoguo Wang Lixin Yu | 2018 | Journal of Energy Chemistry2018，27，5： | 2 |
| 9 | Methanol to propyl-ene :Effect of phosphorus on a high silica HZSM - 5 catalyst显示文摘 | Liu Jian Zhang Chenxi Shen Zhenhao | 2009 | Catalysis Communications2009，10，11： | 1 |
| 10 | Accurate thermody- namic model for the calculation of H2S solubility in pure wa- ter and brines显示文摘 | Duan Zhenhao Sun Rui Liu Rong | 2007 | Energy Fuels2007，21，4： | 1 |
| 11 | Methanol to propylene: Effect of phosphorus on a high silica HZSM-5 catalyst显示文摘 | LIU Jian ZHANG Chenxi SHEN Zhenhao | 2009 | Catal Commun2009，10，11： | 1 |
| 12 | In situ growth of hydrophilic nickel-cobalt layered double hydroxides nanosheets on biomass waste-derived porous carbon for high-performance hybrid supercapacitors显示文摘Rational design and cost-effective fabrication of layered double hydroxides(LDHs)nanosheets with extraordinary electrochemical performance is a key challenge for hybrid supercapacitors(HSCs).Herein,we report a facile in situ growth methodology to eco-friendly synthesize hydrophilic Ni Co-LDHs nanosheets on biomass waste-derived porous carbon(BC)for robust high-performance HSC cathode.The in situ growth process under ultrasonication realizes the rational arrangement of Ni Co-LDHs nanosheets on the surface of BC,which effectively increases the specific surface area,promotes the electronic conductivity and enhances the wettability of Ni Co-LDHs nanosheets without affecting their thickness values.With the beneficial effects of ultrathin thickness of LDHs nanosheets(6.20 nm),large specific surface area(2324.1 m^(2)g^(-1)),low charge transfer resistance(1.65Ω),and high wettability with electrolyte(34°–35°),the obtained Ni2Co1-LDHs/BC50 electrode possesses an ultra-high specific capacitance of 2390 F g^(-1)(956 C g^(-1))at 1 A g^(-1),which is superior to most reported values.Furthermore,an assembled Ni_(2)Co_(1)-LDHs/BC50//YP-80F HSC delivers a maximum specific energy of 52.47 Wh kg^(-1)at375 W kg^(-1),and maintains a high capacitance retention of 75.9%even after 4000 cycles.This work provides a facile approach to fabricate LDHs nanosheets based cathode materials for high-performance HSCs. | Yuchen Wang Yaoyu Liu Zuo Chen Man Zhang Biying Liu Zhenhao Xu Kai Yan | 2022 | Green Chemical Engineering2022，3，1： | 1 |
| 13 | Involvement of rose aquaporin RhPIP1;1 in ethylene-regulated petal expansion through interaction with RhPIP2;1显示文摘 | Wen Chen Xia Yin Lei Wang Ji Tian Ruoyun Yang Daofeng Liu Zhenhao Yu Nan Ma Junping Gao | 2013 | Plant Molecular Biology2013，，3： | 1 |
| 14 | Synthesis and characterization of copolymers of poly(m-xylylene adipamide) and poly(ethylene terephthalate) oligomers by melt copolycondensation显示文摘Poly(m-xylylene adipamide)/poly(ethylene terephthalate)(MXD6/PET) copolymers are synthesized by melt copolycondensation with 1–5 wt% low molecular weight PET oligomers into the MXD6 oligomers at 260 °C.FR-IR and1 H NMR analysis results indicate that the interchange reaction has occurred between MXD6 oligomers and PET oligomers. The thermal behavior of copolymers shows that the melting temperature of MXD6/PET copolymers decreases with the increasing of amount of PET oligomers, while the crystallization temperature accordingly increases. And the equilibrium temperature Tm0 is evaluated to be 251.8 °C for the copolymers with5 wt% PET oligomer adding, which is very close to that of neat MXD6. The tensile and impact strength of MXD6/PET copolymers are significantly improved than that of pure MXD6 by mechanical properties test, and the microfibril structure in the impact fracture sample's surface reveals the feature of ductile fracture. | Fenglei Bi Jianqiang Shao Zhenhao Xi Ling Zhao Di Liu | 2016 | Chinese Journal of Chemical Engineering2016，24，9： | 1 |
| 15 | Dehydrogenation of ethane to ethylene over a highly efficient Ga 2 O 3 /HZSM-5 catalyst in the presence of CO 2显示文摘 | Zhenhao Shen Jian Liu Hualong Xu Yinghong Yue Weiming Hua Wei Shen | 2009 | Applied Catalysis A General2009，，2： | 1 |
| 16 | Methanol topropylene:Effect of phosphorus on a high silica HZSM-5 cat-alyst显示文摘 | Liu Jian Zhang Chenxi Shen Zhenhao | 2009 | Catalysis Communications2009，10，11： | 1 |
| 17 | Methanol topropylene:Effect of phosphorus on a high silica HZSM-5 cat-alyst显示文摘 | Liu Jian Zhang Chenxi Shen Zhenhao | 2009 | Catalysis Communications2009，10，11： | 1 |
| 18 | Accurate thermodynamic model for the calculation of H2S solubility in pure water and brines显示文摘 | Zhenhao Duan Rui Sun Rong Liu | | 0，，： | 1 |
| 19 | Self-organized growth of complex oxide Ce: BaTiO3 nano-island on (100) MgO by pulsed laser ablation显示文摘 | SHI Wensheng CHEN Zhenhao LIU Ningning | 1999 | J Crystal Growth1999，197，： | 1 |
| 20 | Methanol to propylene:effect of phosphorus on a high silica HZSM-5 catalyst显示文摘 | Liu Jian Zhang Chenxi Shen Zhenhao | 2009 | Catalysis Communications2009，10，11： | 1 |
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