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| 1 | Dissolution kinetics and thermodynamic analysis of vanadium trioxide during pressure oxidation显示文摘The dissolution kinetics of vanadium trioxide in sulphuric acid-oxygen medium was examined. It was determined that the concentration of sulphuric acid and stirring speed above 800 r min 1 did not significantly affect vanadium extraction. The dissolution rate increased with increasing temperature and oxygen partial pressure, but decreased with increasing particle size. The dissolution kinetics was controlled by the chemical reaction at the surface with the estimated activation energy of 43.46 kJ·mol-1. The leaching mechanism was confirmed by characterizing vanadium trioxide and the dissolution residue using SEM-EDS analysis. Combined with thermodynamic calculation, the pressure leaching of vanadium trioxide in the temperature range (100 to 140 ℃) studied occurs as follows: V2O3 + O2 + H2SO4 = (VO2)2SO4 + H2O. | Zhou, Xuejiao Wei, Chang Xia, Wentang Li, Minting Li, Cunxiong Deng, Zhigan Xu, Hongsheng | 2012 | Rare Metals2012，31，3： | 4 |
| 2 | Application of computational fluid dynamics simulation for submarine oil spill显示文摘Computational fluid dynamics(CFD) codes are being increasingly used in the simulation of submarine oil spills.This study focuses on the process of oil spills, from damaged submarine pipes, to the sea surface, using numerical models. The underwater oil spill model is developed, and a description of the governing equations is proposed,along with modifications required for the particalization of the control volume. Available experimental data were introduced to evaluate the validity of the CFD predictions, the results of which proved to be in good agreement with the experimental data. The effects of oil leak rate, leak diameter, current velocity, and oil density are investigated, by the validated CFD model, to estimate the undersea leakage time, the lateral migration distance,and surface diffusion range when the oil reaches the sea surface. Results indicate that the leakage time and lateral migration distance increase with decreasing leak rates and leak diameter, and increase with increasing current velocity and oil density. On the other hand, a large leak diameter, high density, high leak rate, or fast currents result in a greater surface diffusion range. The findings and analysis presented here will provide practical predictions of oil spills, and guidance for emergency rescues. | YANG Zhenglong YU Jianxing LI Zhigan CHEN Haicheng JIANG Meirong CHEN Xi | 2018 | Acta Oceanologica Sinica2018，37，11： | 3 |
| 3 | Recovery of H 2 SO 4 from an acid leach solution by diffusion dialysis显示文摘 | Chang Wei Xingbin Li Zhigan Deng Gang Fan Minting Li Cunxiong Li | 2009 | Journal of Hazardous Materials2009，，1： | 2 |
| 4 | Kinetics of vanadium dissolution from black shale in pressure acid leaching显示文摘 | Minting Li Chang Wei Shuang Qiu Xuejiao Zhou Cunxiong Li Zhigan Deng | 2010 | Hydrometallurgy2010，，2： | 1 |
| 5 | Selective solvent extraction of vanadium over iron from a stone coal/black shale acid leach solution by D2EHPA/TBP显示文摘 | Xingbin Li Chang Wei Zhigan Deng Minting Li Cunxiong Li Gang Fan | 2010 | Hydrometallurgy2010，，3： | 1 |
| 6 | Extractionand separation of indium and copper from zinc residue leach liquor by solvent extraction显示文摘 | Li Xingbin Wei Chang Deng Zhigan | 2015 | Separation and Purification Technology2015，156，： | 1 |
| 7 | Recovery of H2 SO4 from an acid leach solution by diffusion dialysis 显示文摘 | Wei Chang Li Xingbin Deng Zhigan et a l | 2010 | J Hazard Mater2010，176，： | 1 |
| 8 | Combining field data and modeling to better understand maize growth response to phosphorus(P) fertilizer application and soil P dynamics in calcareous soils显示文摘We used field experimental data to evaluate the ability of the agricultural production system model (APSIM) to simulate soil P availability,maize biomass and grain yield in response to P fertilizer applications on a fluvo-aquic soil in the North China Plain.Crop and soil data from a 2-year experiment with three P fertilizer application rates(0,75 and 300 kg P_(2)O_(5) ha^(–1)) were used to calibrate the model.Sensitivity analysis was carried out to investigate the influence of APSIM SoilP parameters on the simulated P availability in soil and maize growth.Crop and soil P parameters were then derived by matching or relating the simulation results to observed crop biomass,yield,P uptake and Olsen-P in soil.The re-parameterized model was further validated against 2 years of independent data at the same sites.The re-parameterized model enabled good simulation of the maize leaf area index (LAI),biomass,grain yield,P uptake,and grain P content in response to different levels of P additions against both the calibration and validation datasets.Our results showed that APSIM needs to be re-parameterized for simulation of maize LAI dynamics through modification of leaf size curve and a reduction in the rate of leaf senescence for modern staygreen maize cultivars in China.The P concentration limits (maximum and minimum P concentrations in organs)at different stages also need to be adjusted.Our results further showed a curvilinear relationship between the measured Olsen-P concentration and simulated labile P content,which could facilitate the initialization of APSIM P pools in the NCP with Olsen-P measurements in future studies.It remains difficult to parameterize the APSIM SoilP module due to the conceptual nature of the pools and simplified conceptualization of key P transformation processes.A fundamental understanding still needs to be developed for modelling and predicting the fate of applied P fertilizers in soils with contrasting physical and chemical characteristics. | Weina Zhang Zhigan Zhao Di He Junhe Liu Haigang Li Enli Wang | 2024 | Journal of Integrative Agriculture2024，23，3： | 0 |
| 9 | Isotope Hydrogeological Study of Karst Water in the Lu' an Mining District and the Xin'ancun Spring Basin, Shanxi显示文摘Isotope hydrogeological study has shown that the water supply exploration area in the Lu’ an coal mine may be divided into four zones of hydrodynamic conditions and the Xin’ancun Spring Basin where the mine is located may be divided into three Middle Ordovician karst water systems. This paper discusses the features of recharge, runoff and discharge of karst water in various zones, and hydrogeological parameters such as the age, flow rate and natural recharge of karst water have been estimated. | Gong Zizhen, Li Zhaolin, Zhang Zhigan, Institute of Karst Geology, Ministry of Geology and Mineral Resources, Guilin, GuangxiFu Liqun and Zuo Baolin The First Hydrogeological Party, Ministry of Coal Industry, Handan, Hebei | 1994 | Acta Geologica Sinica(English Edition)1994，68，3： | 0 |
| 10 | Orientational Separation of Sulfur in Petroleum Coke by Alkali Calcining and Reflux Washing显示文摘The application of high-sulfur petroleum coke after desulfurization in aluminum electrolysis anodes is an important development trend. However, removing sulfur from high-sulfur petroleum coke is still a significant challenge.This study proposes alkali calcining and reflux washing to examine the impacts of temperature, particle size, the mass ratio of Na_(2)CO_(3) to NaOH, and total sodium addition on the desulfurization efficiency and mechanism. The results show that the desulfurization rate increases with increasing temperature, increasing total sodium content, and decreasing particle size. The addition of alkali can significantly reduce the opening-ring reaction temperature of thiophene and convert organic sulfur into inorganic sulfur(Na_(2)S). Three washing methods were compared, and reflux washing was selected to separate inorganic sulfur(Na_(2)S) from calcined petroleum coke. The sulfur content in petroleum coke decreased from 7.29% to 1.90%, with a desulfurization rate of 80.13% under optimal conditions. The petroleum coke was analyzed before and after desulfurization using X-Ray diffraction(XRD), Scanning Electron Microscopy(SEM), Infrared Spectroscopy(IR), Thermogravimetric Analysis and Differential Scanning Calorimetry(TG-DSC), Gaschromatography-mass Spectrometry(GC-MS). The results show that thiophene and benzothiophene in petroleum coke are decomposed and converted into octane and ethyl cyclohexane. These new observations are expected to provide further understanding and guidance for the utilization of highsulfur petroleum coke. | Su Song Li Minting Ye Fu Wei Chang Li Xingbin Deng Zhigan | 2023 | China Petroleum Processing & Petrochemical Technology2023，25，4： | 0 |
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