CHEMICAL PHYSICS LETTERS
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2021
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IF 2.328
Wenjie Zhang,Xian Xie,Xiong Tong,Shengdong Zhang,Yunpeng Du,Yang Cao,Dongxia Feng
The extraction kinetics of lanthanum (III) from a chloride medium by bis(2-ethylhexyl) phosphate(HDEHP) and dimethylheptyl methyl phosphate(P350) in the presence of sulfonated kerosene are investigated using a Lewis cell. The effects of the stirring rate, temperature, and specific interfacial area on the extraction rate are investigated. The results show that the extraction process is controlled by diffusion and chemical reactions in the interfacial area rather than in the bulk phase. The apparent activation energy and the changes in the enthalpy, entropy, and Gibbs free energy of the extraction reaction are calculated using the Arrhenius equation and transition state theory. The rate equation derived from the experimental results is similar to that of the interface reaction model. A mass transfer model with a rate-control step is proposed. This study provides guidance and data support for an HDEHP-P350 system in industrial production applications.
研究领域:
化学工程
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物理化学
✓ 已验证
DOI
高影响因子
FUEL
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2021
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IF 6.609
Yong Zhang,Hongzheng Zhu,Jinbo Zhu,Fanfei Min,Jun Chen,Qinghui Shi
Understanding the effect of inorganic cations on the adsorption of kerosene droplet at graphite surface is a prerequisite to predict the graphite flotation. Using a high-speed motion acquisition system, the contact angle, kerosene droplet size and three phase contact line (TPC line) were explored. The equivalent diameter of the kerosene droplet increased until 10 -2 mol/L and then decreased slightly with increasing the concentration of NaCl and MgCl 2 . On contrary, the equivalent diameter showed an opposite trend in the presence of AlCl 3 . The final TPC line followed the order: AlCl 3 < MgCl 2 < NaCl at an ion concentration 10 -2 mol/L. Through the simulation of radial distribution function (RDF) via the Material studio software, the oxygen atom was more easily attracted than the hydrogen atom by Na + , resulting in the smallest kerosene droplet-graphite block contact angle in the presence of NaCl. Furthermore, NaCl and MgCl 2 presented an opposite trend to AlCl 3 in the solution/kerosene interfacial tension. Our results matched the cation hydration at different pH. The subsequently conducted graphite flotation showed that the recovery of clean graphite was enhanced by 5.11% (NaCl) and 3.31% (MgCl 2 ) at 10 -2 mol/L, respectively, while gradually decreased by the addition of AlCl 3 . Moreover, the discussion on increasing the graphite recovery by 1% showed that 1.9 mmol/L Na + was equivalent to 3.0 mmol/L Mg 2+ , 18.3 J energy input, 7 mg/L 2-octyl alcohol and 0.9 mg/L diesel, respectively. It indicated that the addition of NaCl and MgCl 2 is of great significance for reducing carbon emission and cleaning flotation process. Our results can provide a valuable insight into the development of technology for surfactant adsorption and mineral flotation, especially for reducing carbon emission.
研究领域:
矿物加工工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CLAY SCIENCE
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2023
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IF 5.6
Jingfeng He,Xin Zhang,Qiang Bai,Shibo Huang,Hao Chen,Chengjing Guo,Lingtao Zhu,Bin Yang
As a vital non-metallic mineral resource , cleaning and purification of coal-series kaolin is of importance for the following processing and utilization. This research focused on surface modification to enhance the decarbonization performance of coal-series kaolin by triboelectric separation. The effect of citric acid or kerosene on the surface modification and charging performance of kaolinite and coal was explored through Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and charge-to-mass ratio measurements. The results indicated that owing to the adsorption of citric acid or kerosene, the decreased O content and the increased C content of coal enhanced the positive charge on the coal surface, while the decreased Al and Si content of kaolinite improved the negative charge on the kaolinite surface, which enlarged the charge-to-mass ratio gap between coal and kaolinite. Meanwhile, citric acid improved the charging performance of kaolinite and coal more significantly than kerosene. Furthermore, the influence of plate voltage, feeding speed, and friction wheel rotating velocity on the decarbonization performance of coal-series kaolin after surface modification was studied by triboelectric separation. The separation results indicated that surface modification with citric acid or kerosene improved the triboelectric separation efficiency of coal-series kaolin, and citric acid could realize the more effective separation of coal-series kaolin than kerosene. For 0.125–0.25 mm, 0.074–0.125 mm, and −0.074 mm coal-series kaolin, with citric acid modification, the valuable component recovery was 81.91%, 82.21%, and 82.83%, respectively, and the decarbonization efficiency was 44.66% (increased by 6.56%), 47.19% (increased by 7.00%), and 14.88% (increased by 2.53%), respectively. Our study provides vital guidance for enrichment and purification of coal-series kaolin resource via triboelectric separation.
研究领域:
矿物加工工程
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材料科学与工程
✓ 已验证
产品关联
DOI
高影响因子
FUEL PROCESSING TECHNOLOGY
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2020
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IF 4.982
Yakun Liu,Chi Ma,Chengxiang Shi,Lun Pan,Junjian Xie,Si Gong,Yong-Chao Zhang,Genkuo Nie,Xiangwen Zhang,Ji-Jun Zou
With the rapid development of spacecraft such as rocket, it is increasingly important to develop high-energy and sustainable fuels. Biofuels synthesized from biomass derivatives provide great convenience for sustainable development. In this work, we reported a route for synthesis of high-energy cyclopropane bio-kerosene by cyclopropanation of myrcene with zinc carbenoid. The reaction conditions including reaction time, reaction temperature, solvent and molar ratio were optimized. Finally, a tricyclic cyclopropane bio-kerosene was synthesized with 69.8% yield under optimum conditions (i.e. zinc carbenoid synthesis temperature of −15 °C, cyclopropanation temperature of 25 °C and solvent of dichloromethane). Importantly, this bio-kerosene possesses a high specific impulse of 328.25 s, much better than the commercial rocket kerosene RP-1, as well as a high net-heat-value of 43.4 MJ/kg and good low-temperature properties.
研究领域:
能源生物学
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有机化学
✓ 已验证
产品关联
DOI
高影响因子
MINERALS ENGINEERING
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2020
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IF 3.795
Xiaoxiao Qiao,An Liu,Zhihong Li,Jinchuan Fan,Canjin Luo,Panpan Fan,Yizhou Liu,Minqiang Fan
A novel combined reagent dodecylamine (DDA)–2-octanol–kerosene was employed to overcome the problems associated with DDA, that is, DDA has a high freezing point and needs to be acidified with hydrochloric or acetic acid when it is used for flotation. The analysis of the basic physical properties of the agent showed that DDA–2-octanol–kerosene had significant advantages in freezing point and dispersibility and its freezing point can be reduced to below 0 °C. From the flotation results of magnetite, it can be seen that DDA–2-octanol–kerosene has a better selectivity. Response Surface Methodology based on a three-level, three-variable Box–Behnken design (BBD) was employed to define the quadratic relationship between the recovery of quartz and the composition of the mixed agent. The results indicated that the recovery of quartz increased with the increase of DDA or 2-octanol dosage, however, kerosene had a marginal positive effect on the recovery of quartz when the amount of kerosene was less than 0.76 times that of DDA and otherwise a negative effect. This study provides a new method and technical support for its industrial application for the reverse flotation of iron ore for the combination of agents in the field of iron ore flotation. And allows for a deeper macro-level understanding of the interaction between the DDA–2-octanol–kerosene ternary mixed agents.
研究领域:
矿物加工工程
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化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
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2020
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IF 1.701
Zhanglei Zhu,Wanzhong Yin,Bin Yang,Haipeng Li,Wanzhong Guo,Jin Yao
In this investigation, the flotation behavior of coking coal using the mixture of oleic acid (OA) and kerosene as a novel collector was further studied through flotation tests, supplemented with optical microscope analysis, X-ray photoelectron spectroscopy (XPS) analysis, and wet-screening analysis. Flotation results showed that both the flotation recovery and rate constant increased with the increasing proportion of OA in the novel collectors. The improved collectivity can be ascribed to the enhanced aggregation tendency between coal particles with the addition of OA. However, the concentrate ash similarly increased as concentrate yield, and the XPS results showed that the novel collector had relative lower selectivity than kerosene. The potential reason to explain the lower selectivity is that OA affected fine high-ash particles greater than that of the coarse particles.
研究领域:
矿物加工工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
THERMOCHIMICA ACTA
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2022
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IF 3.378
Wenhui Fan,Fengquan Zhong
Thermal conductivity of kerosene-based nanofluids is experimentally studied in the paper. Aluminum (Al), alumina (Al 2 O 3 ) and titanium dioxide (TiO 2 ) nanoparticles were dispersed respectively in RP3 aviation kerosene, and thermal conductivity of those nanofluids was measured in a wide range of fluid temperature and particle mass fraction. The increase rate of thermal conductivity of kerosene-based nanofluids reached 60% at a temperature of 403 K. The thermal conductivity of nanofluids changes with different particles, particle size, particle concentration and temperature et al. The change rules are given in this paper in detail. Meanwhile, the experimental results of thermal conductivity are compared with the theoretical model proposed in our previous work originally for water-based nanofluids, and the comparison results are found to be good.
研究领域:
热力学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
MINERALS ENGINEERING
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2014
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IF 1.714
An Liu,Min-qiang Fan,Pan-pan Fan
In this study, a modification of oil assisted flotation processes of quartz particles has been proposed, which is based on introduction of miscible Dodecylamine (DDA)-Kerosene as collector with DDA cationic surfactant coated on kerosene to the hydrophilic quartz particles in the pulp. The property of miscible DDA–Kerosene emulsion was investigated. Due to the adsorption of DDA at kerosene/water interface, a smaller and uniform kerosene emulsion formed. Addition of cationic surfactant to the kerosene emulsion changed the zeta potential value from negative to positive, which resulted in enhancing the adhesion of the oil droplets to negatively charged quartz. The results showed that agglomeration and flotation process can be realized simultaneously with DDA–Kerosene. The agglomeration of fine quartz minerals in the presence of miscible DDA–Kerosene led to the formation of very large compact agglomerates resulting in increasing hydrophobicity of the particles and inducing a higher probability of collision and adhesion to air bubble. Experimental data indicated that miscible DDA–Kerosene had better selectivity and stronger collectability to quartz than DDA–HCl, which can be used as an efficient collector in the reverse flotation of magnetic separation concentrate of TISCO. At the same DDA dosage (60 g/t), separation efficiency got to 18.53% when using DDA–HCl as collector; while a better result was obtained with DDA–Kerosene, the efficiency of separation reached 59.07% which was identical with 120 g/t DDA–HCl.
研究领域:
矿物加工工程
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表面与界面化学
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胶体与界面科学
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资源综合利用
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浮选药剂
✓ 已验证
DOI
高影响因子
Molecular Catalysis
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2024
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IF 3.9
Jianwei Yuan,Kwame Nana Opoku,Pin Zhou,Jiaqing Cao,Yaorao Gao,Haoyang Peng,Baoliang Liu,Xiaohui Chen,Zhenwei Zhang,Fu Yang
The highly efficient green catalytic synthesis of jet fuel from low-chain biomass molecules is very attractive to afford sustainable development. Herein, ultrafine Ni nanoparticles assembled on Nb 2 O 5 nanofibers were constructed and effectively utilized in the reductive coupling of n-octanoic acid, offering a novel approach distinct from traditional hydrogenation methods for fatty acids. During the process, a synergistic effect was observed between the metallic Ni phase and the fibrous Nb 2 O 5 , facilitating immediate ketonization following reduction. This enabled the conversion of n-octanoic acid into pentadecane, a crucial component of aviation kerosene. The key factor driving this conversion was the attainment of a production rate of 8-pentadecanone higher than that of n-octane, particularly under optimal conditions, resulting in a significant yield of pentadecane. The catalytic assessment results show that adjusting Ni loading altered the performance of the catalyst in which 1.0 % Ni/Nb 2 O 5 afforded the best catalytic activity. By precisely controlling the reaction temperature at 300 °C and maintaining a hydrogen pressure of 1 MPa, an impressive pentadecane yield of 70.5 % was achieved. This innovative approach, which combines reduction with ketonization, offers a promising strategy for producing long-carbon chain alkanes from short-carbon chain fatty acids within a single reactor. This not only reduces economic costs but also streamlines overall processes, presenting a significant advancement in sustainable fuel production.
研究领域:
催化化学
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绿色能源
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
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2020
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IF 2.87
Qian Li,Juying Zhao,Licong Jin,Decai Li
Kerosene-based ferrofluid (FF) loaded with multiwalled carbon nanotubes (MCNTs) is prepared and characterized to enhance heat conduction and furthermore for potential application in high-speed ferrofluid seals. The present study investigates kerosene-based ferrofluid loaded with MCNTs for the thermal conductivity and magnetization behaviors by varying temperature, weight fractions of MCNTs, and functional groups of MCNTs. The thermal conductivity is then measured by using a transient hot wire method, and magnetization behaviors are measured by using vibrator sample magnetometers. Microstructures among MCNTs and microstructures between MCNTs and magnetic nanoparticles in nanofluids are analyzed by optical microscopy and transmission electron microscopy. Experiments are carried out in the temperature range of 20–50 °C, MCNT weight fraction range of 0–1% for kerosene-based ferrofluid loaded with pristine MCNTs (p-MCNTs), MCNTs functionalized with carboxylic groups (MCNTs-COOH), and MCNTs functionalized with hydroxyl groups (MCNTs-OH). Results show that thermal conductivity and magnetization of FF + MCNTs nanofluids decrease with the increase in temperature. The addition of MCNTs increases the thermal conductivity and decreases the magnetization of the original ferrofluid, especially in the FF + p-MCNTs nanofluids. Furthermore, the addition of 1 wt % p-MCNTs increases the thermal conductivity and decreases the magnetization of the original ferrofluid by 12.47 and 7.73%, respectively. Moreover, the FF + 1 wt % p-MCNTs nanofluid can be stable for at least eleven weeks, which might be basically applied to high-speed ferrofluid seals.
研究领域:
材料科学
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热物理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
THERMOCHIMICA ACTA
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2016
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IF 1.938
X.K. Gao,X. Wen,H. Zhou,Q. Zhu,J.L. Wang,X.Y. Li
In this work, a novel and simple method was put forward to measure the isobaric specific heat capacity for the kerosene RP-3 with a flow-calorimeter at the conditions of high temperature and high pressure. Based on the energy conservation principle, the formula for heat capacity was derived and its measurement was realized by the convective mixing method between the hot and cold fuel. Taking the precision of the instrument and the error transfer into account, the relative expanded uncertainty of this method was acquired of about ± 6.38% (coverage factor k = 2). Meanwhile, the accuracy and reliability were verified by the standard material of water and n -decane. In the temperature range from (296.2–719.0) K and under pressure range from (2.4–4.0) MPa, the measurement for the kerosene RP-3 was carried out and the experimental observations were compared and agreed well with the published data. At last, an empirical correlation relationship of heat capacity due to the temperature and pressure was presented by using Garg’s model with the measured experimental data.
研究领域:
物理化学
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能源工程
✓ 已验证
DOI
高影响因子
FUEL
·
2013
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IF 3.357
Lei Yue,Xiaoxing Lu,Hai Chi,Yongsheng Guo,Li Xu,Wenjun Fang,Yu Li,Shenlin Hu
Three different kinds of palladium nanoparticles modified by octadecanethiol, octadecylamine, and mixture of them have been prepared, which are simply marked as Pd@S, Pd@N and Pd@S&N in turn. The nanoparticles are characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and thermo-gravimetric analysis (TGA). It follows that the average diameters of the nanoparticles are 1–3 nm. Pd@S shows noncrystalline structure, while Pd@N and Pd@S&N show face-center cubic (fcc) structure. These palladium nanoparticles can be well-dispersed in decalin , and then the nanofluids composed of decalin and palladium nanoparticles are prepared, which can be regarded as pseudohomogeneous systems. The cracking of each nanofluid containing 500 ppm Pd is performed under supercritical conditions (3.5 MPa, 600–750 °C) of decalin with a mass flow rate of 1 g/s in an electrically heated tube reactor which simulates a single passage in a practical heat exchanger. The cracking results indicate that these nanoparticles exhibit catalytic activity to a certain extent, and the activity of Pd@N nanoparticles is better than that of Pd@S or Pd@S&N. At 750 °C, the conversion of decalin is raised from 70.31 wt% of thermal cracking to 73.21 wt% with the existence of Pd@S, while that raised to 80.54 wt% with Pd@S&N and even raised to 91.85 wt% with Pd@N. The heat sink of nanofluids is effectively enhanced, and the nanofluid containing Pd@N shows the highest value, which reaches 3.50 MJ/kg and is increased by 0.29 MJ/kg in comparison with the heat sink of thermal cracking at 750 °C. The cracking of aviation kerosene containing Pd nanoparticles is then performed, the results of which confirm the feasibility of practical application of Pd nanoparticles to hydrocarbon fuels.
研究领域:
化学工程
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材料科学
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催化化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）