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    A novel MIL-101(Cr) acidified by silicotungstic acid and its catalytic performance for isomerization of n-heptane
    China Petroleum Processing & Petrochemical Technology    2022, 24 (1): 68-80.  
    Abstract453)      PDF(pc) (1596KB)(90)       Save
    0.4%Pt/xSTA-MIL-101(Cr) metal-acid bifunctional catalysts were prepared by impregnation using STA-MIL-101(Cr) as the support. The synthesized samples were verified to exhibit a typical octahedral structure of MIL-101(Cr) and the pore structure were arranged orderly. The specific surface area of the samples was extremely high and the samples were micro-mesoporous composite materials. Silicotungstic acid could retain its Keggin structure in the 0.4%Pt/xSTA-MIL-101(Cr) samples and the catalyst possessed moderately strong Br?nsted acid sites. Besides, the dispersion of Pt particles in MIL-101(Cr) was relatively high. n-Heptane isomerization was first used as a probe to test the novel 0.4%Pt/xSTA-MIL-10(Cr) catalyst. Compared with the conventional silicate catalysts, the catalytic performance of 0.4%Pt/30wt%STA-MIL-101(Cr) was significantly improved with n-heptane conversion of 58.93% and iso-heptane selectivity of 95.68%, respectively, when the reaction time was 2 h at the reaction temperature of 260 oC. The catalyst could still maintain a relatively high catalytic performance during the reaction time of 5 h. Compared with the non-noble metal catalysts, the catalytic efficiency is relatively high. The mechanism model of n-heptane isomerization over 0.4%Pt/xSTA-MIL-101(Cr) catalyst was established.
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    Carbon Encapsulated Nickel Nanocomposites for the Cathode in Advanced Lithium Sulfur Batteries
    Yang Yuxiang, Xie Jingxin, Wu Genghuang, Zhu Na, Li Huan, Rong Junfeng
    China Petroleum Processing & Petrochemical Technology    2021, 23 (4): 1-6.  
    Abstract195)      PDF(pc) (882KB)(231)       Save
    Lithium sulfur (Li-S) batteries are poised to be the next generation of high-density energy storage devices. In recent years, the concept of “electrocatalysis” has been introduced into the field of Li-S batteries, and some transition metals have been proved to catalyze the electrochemical conversion reaction of sulfur species. In this study, carbon encapsulated nickel nanoparticles (Ni@C) with a specific surface area of 146 m2/g are shown to play a definitive electrocatalytic role for the sulfur cathode. With Ni@C incorporated, the Ni@C/G-S electrode achieved a better electrochemical performance than the G-S electrode. Moreover, the reversible capacity and cycle stability were further improved through chemical modifications of the carbon shell. The influence of doping with different elements on the Li-S battery performance was also investigated in detail. Higher specific capacities of 1229 mAh/g, 927 mAh/g, and 830 mAh/g were achieved at 0.2 C, 0.5 C, and 1.0 C for the N-Ni@C-G/S electrode. Besides, the B-Ni@C-G/S electrode possessed a best cycle stability.
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    Heteroatom-doped carbon Spheres from Fluidized Catalytic Cracking Slurry Oil as anode material for lithium-ion battery
    China Petroleum Processing & Petrochemical Technology    2022, 24 (1): 1-10.  
    Abstract159)      PDF(pc) (1988KB)(160)       Save
    A facile injected pyrolysis strategy to synthesize heteroatom-doped carbon spheres (CSs) with good conductivity is proposed by only using fluidized catalytic cracking slurry oil (FCCSO) as carbon source through a pyrolysis reaction process at 700-1000°C. The structures of CSs are characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS). The influence of preparation conditions on the morphology of CSs and its electrochemical properties as anode material for Lithium-ion battery (LIBs) are investigated. The XPS measurement results show that the CSs mainly contain C, N, O and S elements. With the increase of pyrolysis temperature, the particle size of CSs decreases but the graphitization degree of CSs increases. As the anode material for lithium-ion batteries (LIBs), CSs shows excellent electrochemical performance with a high maximum reversible capacity of 365 mAh·g-1 and an initial coulombic efficiency of 73.8% at a low current density of 50 mA·g-1. CSs exhibits excellent cycling stability in the current range of 50 mA·g-1 to 2 A·g-1 and still maintains a stable reversible capacity of 347 mAh·g-1 when the current is cycled back to 50 mA·g-1. This is mainly due to the existence of suitable heteroatom content and unique spherical structure of CSs. The heteroatom-doped CSs provides a new choice for the preparation of high efficiency anode materials for LIBs.
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    Dechlorination of Crude Oil by Phase Transfer Catalyst in Nucleophilic Substitution Reaction
    Gu Jin, Han Xin†, Liu Jichang, Huang Zihao, Xing Biao
    China Petroleum Processing & Petrochemical Technology    2021, 23 (4): 18-28.  
    Abstract140)      PDF(pc) (836KB)(183)       Save
    Dechlorination of crude oil is an effective way to alleviate corrosion in refinery units, and the critical process is the removal of organochlorine which can be efficiently removed through nucleophilic substitution reaction catalyzed by phase transfer. Herein, seven typical chlorinated alkanes were selected as model compounds to study the mechanism of dechlorination of crude oil by phase transfer catalyst in the nucleophilic substitution method, and a new dechlorination reagent using hexamethyl quaternary ammonium hydroxide with two quaternary ammonium groups as phase transfer catalyst, ethylenediamine as nucleophile and ethanol as solvent was developed. The results show that the dechlorinating performances of the dechlorination reagent on the model compounds are as follows: epichlorohydrin > 1,2-dichlorobutane > 1,2-dichloroethane > 1,3-dichloropropane > 2-chloropropane > 1-chlorobutane > chloroisobutane, and the results of the reaction kinetics show that epichlorohydrin with epoxy structure has the lowest activation energy in the process of nucleophilic substitution reaction by the phase transfer catalyst which makes it easier to be removed by the dechlorination reagent. The removal rate of epichlorohydrin can reach up to 99.4%. The optimal dechlorination reagent used ethylenediamine as nucleophile, ethanol as solvent and hexamethyl quaternary ammonium hydroxide as phase transfer catalyst. The dechlorinating rate of the Iranian crude oil reached 71.6 % at the reaction temperature of 95°C, the reaction time of 90 minutes, the dechlorination reagent dosage of 1000 mg/kg and the 6:1 molar ratio of phase transfer reagent and nucleophile. In addition, the mechanism of phase transfer in nucleophilic substitution reaction of chloroalkanes is investigated in the paper.
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    MnxCo3-xO4 microtubules with enhanced catalytic activity towards toluene combustion:effects of redox property and oxygen species
    Zhang Hanyu Hu yue Zhang Xiaohan Sun Mengyao Liu Rui Jin Quan Qi Jian
    China Petroleum Processing & Petrochemical Technology    2021, 23 (4): 7-17.  
    Abstract129)      PDF(pc) (1344KB)(148)       Save
    Redox property and oxygen species play important role in the catalytic oxidation of volatile organic compounds (VOCs). In this paper, a series of MnxCo3-xO4 catalysts with tubular structure were synthesized and applied for the catalytic combustion of toluene. Various characterization technologies were employed to reveal the relationship between the catalytic performance of the MnxCo3-xO4 catalysts and Mn doping. The results of XRD, SEM and N2 adsorption-desorption showed that the Mn doping had significant effects on the structure and morphology of the MnxCo3-xO4 catalysts. The H2-TPR, O2-TPD and XPS results proved that the strong interaction between Co and Mn resulted in the enhanced Olatt mobility, richer active oxygen species, and enhanced redox property in comparison with the pure Co3O4 sample, which were crucial to the improvement of the catalytic activity of Co-Mn catalysts. The best catalyst, Co5-Mn5 sample, exhibited a good and stable activity to catalytically oxidize toluene at low temperatures even in the presence of water vapor, indicating that it is a potential material for the practically catalytic industrialization for the abatement of toluene.
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    Photocatalysts for photocatalytic CO2 reduction:A review
    Lizhong Zhang
    China Petroleum Processing & Petrochemical Technology    2022, 24 (1): 149-160.  
    Abstract124)      PDF(pc) (328KB)(136)       Save
    Energy crisis and environmental pollution have become vitally severe challenges for the current society. During the circumstances of pursuing carbon peak and carbon neutrality, photocatalytic CO2 reduction will be an essential, necessary and even inevitable development requirement and trend. However, there are some bottlenecks that need to be addressed immediately, such as low quantum efficiency and narrow light absorption range for single photocatalysts. Therefore, efficient and stable visible light driving materials are the core challenge in the field of photocatalytic CO2 conversion. This paper reviewed the photocatalysts used for CO2 reduction classified as metal photocatalysts, non-metal photocatalysts, and MOFs photocatalysts, and the CO2 reduction capacity and mechanism of different photocatalysts were described. In the end, the problems to be solved and the future development of photocatalytic CO2 reduction were summarized.
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    Biochar Supported Nanoscale Zero-valent Iron Composites for The Removal of Petroleum
    Qin Feifei, Xu Wenfei, Hao Boyu, Yin Linghao, Song Jiayu, Zhang Xiuxia
    China Petroleum Processing & Petrochemical Technology    2021, 23 (4): 47-57.  
    Abstract113)      PDF(pc) (873KB)(102)       Save
    In the process of oilfield exploitation, the extensive use of chemical agents leads to serious crude oil emulsification, which makes the produced liquid contain a large amount of crude oil that is difficult to remove. In order to treat oily wastewater efficiently, quickly and without secondary pollution, nanoscale zero-valent iron (nZVI) was supported on biochar prepared from spent mushroom substrate (SMS) to prepare a novel iron-carbon composite (SMS-nZVI), and its ability to treat high concentration of oily wastewater was comprehensively evaluated. The results of the indoor simulated removal of petroleum experiment show that, compared with SMS and nZVI, SMS-nZVI can remove petroleum quickly and effectively. Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET) nitrogen-adsorption and Fourier transform infrared (FTIR) were used to characterize the morphology, structure and properties of the composite. The results showed that SMS biochar can effectively prevent the agglomeration of nZVI, increase the overall specific surface area and enhance the adsorption capacity of the composite. Comparing with other biochar substrates, it was found that the iron-carbon composits prepared by spent mushroom substrate has a better petroleum removal effect than the traditional wheat straw biochar. By optimizing the experimental conditions, an operation process with the best petroleum removal effect was obtained: when the mass ratio of nZVI to biochar was 1:5, pH was 4, and the initial concentration of petroleum was 1000mg·L-1, the petroleum removal rate could reach 95% at 5h. After exposing SMS-nZVI to air for 30 days for natural aging treatment, SMS-nZVI can still maintain an oil removal rate of more than 62%, which indicates that the composite has good stability.
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    Synthesis of Allyl Ethers from Allyl Chloride with Alcohols Catalyzed by Copper-Zirconium Oxide supported PdO
    Yuan Enxian, Sang Ruishi, Jian Panming
    China Petroleum Processing & Petrochemical Technology    2021, 23 (4): 65-74.  
    Abstract108)      PDF(pc) (1778KB)(122)       Save
    A series of copper-zirconium oxides with the Cu/Zr ratio ranging from 2/8 to 9/1 was synthesized by the co-precipitation method. PdO/CumZrn catalysts were prepared and applied to synthesize allyl ethers via the etherification reactions of allyl chloride with alcohols. The characterization results demonstrated that the presence of ZrO2 phase not only can facilitate the high dispersion of Pd2+, but can also favor the formation of Cu+ via the interaction between CuO and ZrO2. The catalytic performance initially increases and then falls off with the progressive increase in the Cu/Zr ratio. The superior performance with a conversion of 53.2% and a selectivity of 60.3% was achieved over the resulting PdO/Cu7Zr3 catalyst with the highest surface molar proportion of Cu+. Good catalytic activity was obtained, because the Cu+-Oα- pairs could enhance the dissociative activation of the -O-H bond in alcohols compared with Cu2+-O2- pairs, subsequently promoting the etherification reactions.
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    One-step Synthesis and Photocatalytic Degradation Performance of Sulfur-doped Porous g-C3N4 nanosheets
    China Petroleum Processing & Petrochemical Technology    2022, 24 (1): 81-89.  
    Abstract102)      PDF(pc) (1616KB)(107)       Save
    Abstract: In this study, sulfur-doped porous g-C3N4 nanosheets (CN-T-U 1.75) have been synthesized successfully by one-step calcination using urea and thiourea as the precursors. CN-T-U 1.75 exhibited excellent photocatalytic performance for Rhodamine B (RhB) degradation under visible light irradiation, with the kinetic reaction rate constant of 0.01838 min-1. Analysis of the characterization results showed that CN-T-U 1.75 had a larger specific surface area, and the doping caused a change in the energy band structure. Moreover, the catalytic mechanism analysis shows it could produce two oxidation groups of ?O2- and ?OH to degrade pollutants synergistically.
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    Industrial Preparation and Acid Resistance of Ultra-stable Y Zeolite with Small Cell Size Produced by Gas-phase Method
    Zhang Jing, Jia Jishun, Sha Hao, Lu Guanqun, Yan Jiasong, Wang Shengji, Zhou Lingping
    China Petroleum Processing & Petrochemical Technology    2022, 24 (2): 85-90.  
    Abstract102)      PDF(pc) (357KB)(49)       Save
    The zeolite HSY-S with small cell size prepared by gas-phase ultra-stable method had been researched and developed, and industrial preparation tests of HSY-S had been successfully carried out for the first time in the world. The acid resistance of HSY-S prepared in industrial was investigated by acid solutions with different pH values. The structures and properties of HSY-S and its acid-treated samples were characterized by XRD, XRF,BET and IR. The results showed that the zeolite HSY-S has the characteristics of high crystallinity, good stability, large specific surface area and good acid resistance.
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    Selective Hydrogenation of Maleic Anhydride to Succinic Anhydride over Nickel Catalyst Supported on Carbon Microspheres
    Zhou Yafen Chen Qilin Wang Qing Song Yu Zhou Limei
    China Petroleum Processing & Petrochemical Technology    2021, 23 (4): 75-82.  
    Abstract100)      PDF(pc) (818KB)(164)       Save
    The colloidal carbon microspheres (CMS) were prepared by hydrothermal method. The nickel catalysts supported on carbon microspheres (Ni/CMS) were further prepared and were characterized by fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM) and N2 adsorption. The selective hydrogenation of maleic anhydride (MA) to succinic anhydride (SA) over the Ni/CMS catalysts was investigated. The results indicated that the Ni/CMS catalyst prepared with glucose as carbon source and calcined at 500 ○C exhibited the best performance. The hydrogen pressure, reaction temperature, and reaction time significantly influenced on the conversion of maleic anhydride in the hydrogenation. 98.4% conversion of MA and 100% selectivity to SA were achieved over the Ni/CMS catalyst in acetic anhydride solvent under the mild conditions of 90 ○C, 1.0 MPa of H2 pressure, and reaction time of 3 h.
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    Molecular simulation of chain initiation mechanism in the oxidation of lubricant base stock
    Xia Lei Li Yan Zhang Hongmei Jiang Zhengyi Long Jun
    China Petroleum Processing & Petrochemical Technology    2021, 23 (4): 105-112.  
    Abstract97)      PDF(pc) (345KB)(138)       Save
    Chain initiation reactions in the oxidation process of lubricant base stock molecules were studied by molecular simulations. Two ways to initiate lubricant oxidation were investigated. They were the dissociation of chemical bonds in base stock molecules and the reaction between base stock molecules and oxygen (O2), respectively. Reaction activation energies of above methods were calculated. The results show that C—C bonds are more likely to break than C—H bonds to generate free radicals by the pyrolysis of chemical bonds. The C—C bonds with tertiary carbon atoms are preferential positions to crack. However, bond dissociation energies of them are above 360 kJ/mol, which are difficult to occur under lubricant working conditions. The chain initiation is more likely to occur by the way that O2 attacks the two atoms in C—H bonds at the same time, and embeds into the C—H bond to produce hydrocarbon peroxides. And then, the O—O bond is cracked to form hydroxyl radicals and alkoxy radicals. The C—H bonds with tertiary carbon atoms are the preferential reaction sites, whose reaction activation energy is about 190.11 kJ/mol.
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    Synthesis and Tribological Properties of Sodium-Ion-Exchanged α-Zirconium Phosphate
    Tian Chengguang Zhang Xiaosheng Xu Hong Dong Jinxiang
    China Petroleum Processing & Petrochemical Technology    2021, 23 (4): 83-94.  
    Abstract93)      PDF(pc) (1911KB)(122)       Save
    Sodium-ion-exchanged α-zirconium phosphate (Na-α-ZrP) was synthesized by using disodium hydrogen phosphate as sodium source, which was an efficient ion exchange way. The tribological properties of Na-α-ZrP as an additive in lithium grease were investigated by a four-ball tester and a SRV tester, respectively. The synergistic effect of Na-α-ZrP with ZDDP also be studied. Results indicate that Na-α-ZrP can effectively improve the antiwear and friction-reducing properties of lithium grease. Combined with ZDDP, grease demonstrated excellent anti-wear performance, especially under high loads. The possible wear mechanism was discussed by observing the worn surface under 3D optical profiler, scanning electron microscope (SEM), energy-dispersive spectrometry (EDS) and X-ray photoelectron spectroscopy (XPS). The simple synthetic method and superior tribological performance make the Na-α-ZrP become a potential choice for lubricant additives.
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    Study on Spray Characteristics of Dimethyl carbonate Blended Fuel in IC Engines
    Fu Wei, Zhou Kun, Liu Junya, Xie Hongxi, Li Yayun, Lu Lei, Bao Jihu, Cheng Yunlang
    China Petroleum Processing & Petrochemical Technology    2021, 23 (4): 29-36.  
    Abstract92)      PDF(pc) (1542KB)(137)       Save
    In this study, the spray characteristics of the blended fuel of biodiesel and Dimethyl carbonate were compared with those of biodiesel and diesel. The macroscopic spray characteristics parameters including spray tip penetration, maximum spray width, average spray cone angle and peak tip velocity were used to evaluate the spray characteristics of the blended fuel. The results showed that the spray tip penetration of blended fuel was lower than that of biodiesel, while the spray cone angle and maximum spray width of blended fuel were both larger than that of biodiesel. On the basis of Hiroyasu and Arai mathematical model, combined with the actual working conditions of this experiment, including the viscosity and density of the fuel physical parameters, a correct model of spray penetration was established, and the experimental results were compared.
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    Study on viscosity reducing and oil displacement agent for water-flooding heavy oil reservoir
    China Petroleum Processing & Petrochemical Technology    2022, 24 (1): 11-18.  
    Abstract92)      PDF(pc) (1282KB)(148)       Save
    In the process of water-flooding development of heavy oil reservoir, due to the high viscosity and oil-water mobility ratio of heavy oil, there are some problems such as poor fluidity, high residual oil saturation and low recovery efficiency, which seriously restrict the efficient development of heavy oil. The molecular structure characteristics of asphaltene and resin in heavy oil were analyzed. Based on the three most concerned properties of chemical agents, including emulsification performance, interface performance and oil washing performance, three chemical oil displacement agents for heavy oil reservoirs were developed, and the structure of the chemical agents were characterized by high resolution mass spectrometry. The performance evaluation of chemical agent and core displacement experiment show that there is no obvious correlation between the properties of chemical agents, including interfacial tension, emulsifying ability and oil washing ability. For heavy oil reservoirs, the emulsification and viscosity reduction performance of chemical agents was more important than oil washing capacity, and oil washing capacity was more important than interface performance. Viscosity reduction performance was the key parameter of oil displacement agent suitable for heavy oil reservoir. The composite binary system of viscosity reducer and polymer had better oil recovery than using viscosity reducer alone.
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    Reaction Process of Heavy Hydrocarbon in Ebullated Bed Hydrogenation
    Wang Jianjun Tong Yujun Tao Yang Ge Hailong Meng Zhaohui
    China Petroleum Processing & Petrochemical Technology    2021, 23 (4): 113-120.  
    Abstract85)      PDF(pc) (453KB)(130)       Save
    The properties and structural changes of unconverted oil (UCO) in ebullated bed residue hydrogenation at different conversion rates were analyzed to clarify the reaction process of heavy components. Meanwhile, the processing routes of UCO, delay coking and solvent deasphalting, were investigated. The results showed that with the increase of conversion, the impurity removal rate increased; meanwhile the contents of sulfur and metal in UCO decreased, while the contents of nitrogen and residual carbon increased, and the colloidal stability of UCO became worse. The structural parameters of UCO indicated that the change of heavy oil molecular structure was mainly opening of cycloalkanes ring, hydrogenation saturation of aromatic rings and dealkylation reaction during the ebullated bed hydrogenation; the aromatic structure was basically unchanged at high conversion, mainly due to the ring opening of cycloalkanes and the fracture reaction of alkyl side chains. The coking route of UCO showed that low sulfur petroleum coke with different grades could be prepared by adjusting ebullated bed conversion to produce UCOs with different properties. The coke generating coefficient and sulfur transfer coefficient in UCO coking process were higher than those in residue coking. The properties of deasphalt oil (DAO) of UCO was significantly improved and could be used as FCC or hydrocracking feedstock. The DAO yield of UCO feedstock at high conversion was higher, and its sulfur content was lower and residual carbon value was higher.
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    Investigation of nitrite production pathway in integrated partial denitrification/anammox process via isotope labelling technique and the relevant microbial communities
    Yan-Zhe LI Zhao Dongfeng Guo Yadong Zhao Chaocheng Liu Fang Liu Chunshuang
    China Petroleum Processing & Petrochemical Technology    2022, 24 (1): 129-134.  
    Abstract84)      PDF(pc) (795KB)(71)       Save
    In this study, the nitrogen removal performance of PDA process was investigated by using UASB reactor. High TN removal efficiency (91.97%) was achieved at influent nitrogen loading rate of 0.64 kg/m3d. Anammox bacteria did execute the function of converting nitrate to nitrite in PDA system according to 15N isotope labeling experiments and the contribution was approximately 36.3%. Candidatus_Brocadia, Candidatus_Kuenenia and Thauera were functional strains for anammox and denitrification process, respectively. Thauera and Candidatus_Brocadia were more important for TN removal at high loading rates (0.64 kg/m3d). This result provides a theoretical and technical foundation for the application of denitrifying ammonium oxidation process.
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    Physicochemical and Tribological Properties of Anti-seize Thread Lubricant
    Wang Zhimin Xiang Shuo Liu Xiaoqiang Bao Yichen Shi Xiuqiang He Yan
    China Petroleum Processing & Petrochemical Technology    2021, 23 (4): 95-104.  
    Abstract83)      PDF(pc) (2918KB)(110)       Save
    Di-aromatics base oil and graphite powder, adding with viscosity index improver and anti-oxidant and rheological additive, were used to prepare a kind of anti-seize thread lubricant. Its physical chemistry properties, such as water resistance, thermal oxidation and aging properties, tribological performance were evaluated and compared with those of some commercial product. The results show that the overall the overall performance of the anti-seize thread lubricant met the level of some commercial product, and some properties such as thermal stability, anti-wear and anti-friction properties were better. It is more suitable for high temperature conditions.
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    Assembling Fe2O3/BiOCl Composite for Highly Effective Degradation of Water Pollutants under Visible-Light Irradiation
    Liu Xiaoqing
    China Petroleum Processing & Petrochemical Technology    2022, 24 (1): 59-67.  
    Abstract79)      PDF(pc) (1731KB)(99)       Save
    Fe2O3 was synthesized by the solvothermal method, and the synthesized Fe2O3 was added in the process of preparing BiOCl by hydrolysis, and then Fe2O3/BiOCl photocatalytic materials with different composite ratios were prepared. The optimal Fe2O3/BiOCl (1Fe/50Bi) sample showed a highest photocatalytic efficiency for cationic dyes (Rhodamine B) and anionic dye (methyl orange) degradation irradiated with visible light, as compared with that of a bare BiOCl catalyst. Meanwhile, radical capturing experiments indicated that the photo-induced holes (h+) is the main active species. X-ray powder diffraction and ultraviolet-visible diffuse reflectance spectroscopy were used to characterize the structural and optical properties, which proved that Fe2O3 was successfully composited to the BiOCl surface and effectively reduced the bandgap of BiOCl. More importantly, the optimal 1Fe/50Bi sample shows the highest photocatalytic efficiency for tetracycline (TC) degradation (98%) irradiated with visible light, as compared with that of a bare BiOCl catalyst. Consequently, the Fe2O3/BiOCl photocatalyst have potential applications in environmental purification.
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    Electrospinning nanofiber membrane reinforced PVA composite hydrogel with preferable mechanical performance for oil-water separation
    cheng zhilin
    China Petroleum Processing & Petrochemical Technology    2022, 24 (1): 19-26.  
    Abstract78)      PDF(pc) (1707KB)(92)       Save
    Nowadays hydrogels have been attracting the massive interest in oil-water separation due to their robust hydrophilicity and fantastic underwater oiliness features. However, the weak toughness and tensile strength shortcomings of hydrogels have thus inhibited their actual applicability. For this reason, we successfully fabricated the electrospun nanofiber membrane-reinforced PVA composite hydrogels. The PVA-PAN composite hydrogel has exhibited the excellent tensile strength and friction performance, separately enhancing 174.2% of the tensile strength, and reducing 20.7% of the friction coefficient and 58.7% of wear volume relative to the neat PVA hydrogel. Furthermore, the pull-out experiments indicated that the PAN nanofiber membrane exerted a stronger interface bonding effect with PVA hydrogel. The oil-water separation evaluation test showed that the separation efficiency reached up to 97.6% for treating the SA-100 lubricating oil/water system.
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