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Effect of alumina and silica nanocomposite based on polyacrylamide on light and heavy oil recovery in presence of formation water using micromodel

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petroleum 2024年第2期10卷 338-353页

作者： Ashkan Maleki Behnam Sedaee Alireza Bahramian Sajjad Gharechelou Nahid Sarlak Arash Mehdizad Mohammad reza Rasaei Aliakbar Dehghan Science and Research Branch Islamic Azad UniversityIran Institute of petroleum engineering School of Chemical EngineeringUniversity of TehranIran school of Geology College of ScienceUniversity of TehranIran Department of chemistry Lorestan university Iran Iranian Offshore Oil Company Iran

Increasing world request for energy has made oil extraction from reservoirs more *** novel EOR methods have been proposed and utilized for this *** nanocomposites in chemical flooding is one of these novel *** this study,we investigated the impact of six injection solutions on the recovery of light and heavy oil with the presence of two different brines as formation water using a homogenous glass *** of the injection solutions were based on a 40,000 ppm Na Cl synthetic seawater(SSW),one of which was additive free and the others were prepared by dispersing nanocomposite silica-based polyacrylamide(NCSP),nanocomposite alumina-based polyacrylamide(NCAP),the combination of both nanocomposites silica and alumina based on polyacrylamide(NCSAP),surfactant(CTAB)and polyacrylamide(PAM)with a concentration of 1000 ppm as *** Stability of nanocomposites was tested against the salinity of the brine and temperature using salinity and DSC tests which were *** stability tests,IFT,contact angle and oil recovery measurements were *** results revealed that in addition to the effect of silica and alumina nanocomposite in reducing interfacial tension and wettability alteration,control of mobility ratio caused a major improvement in sweeping efficiency and oil *** to the sweeping behavior of injected fluids,it was found that the main effect of surfactant was wettability alteration,for polyacrylamide was mobility control and for nanocomposites was the reduction of interfacial tension between oil and injected fluid,which was completely analyzed and checked ***,NCSAP with 95.83%and 70.33%and CTAB with 84.35%and 91%have the highest light oil recoveries at 250,000 ppm and 180,000 ppm salinity,respectively which is related to the superposition effect of interactions between nanocomposites,solution and *** on our results it can be concluded that the most effective mechanism in oil recovery was I

关键词： Enhanced oil recovery Micromodel Polyacrylamide Nanocomposite Salinity Alumina and silica nanoparticles

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Multifunctional AlPO_(4)reconstructed LiMn_(2)O_(4)surface for electrochemical lithium extraction from brine

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Journal of Energy chemistry 2024年第2期89卷 410-421,I0010页

作者： Jun Gu Linlin Chen Xiaowei Li Guiling Luo Linjing Fan Yanhong Chao Haiyan Ji Wenshuai Zhu school of Materials Science and engineering Jiangsu UniversityZhenjiang 212013JiangsuChina school of chemistry and chemical engineering Jiangsu UniversityZhenjiang 212013JiangsuChina College of Science State Key Laboratory of Heavy Oil ProcessingChina University of Petroleum-BeijingBeijing 102249China school of the Environment and Safety engineering Jiangsu UniversityZhenjiang 212013JiangsuChina

LiMn_(2)O_(4)(LMO)electrochemical lithium-ion pump has gained widespread attention due to its green,high efficiency,and low energy consumption in selectively extracting lithium from ***,collapse of crystal structure and loss of lithium extraction capacity caused by Mn dissolution loss limits its industrialized ***,a multifunctional coating was developed by depositing amorphous AlPO_(4)on the surface of LMO using sol-gel *** characterization and electrochemical performance test provided insights into the mechanism of Li^(+)embedment and de-embedment and revealed that multifunctional AlPO_(4)can reconstruct the physical and chemical state of LMO surface to improve the interface hydrophilicity,promote the transport of Li^(+),strengthen cycle ***,after 20 cycles,the capacity retention rate of 0.5AP-LMO reached 93.6%with only 0.147%Mn dissolution *** average Li^(+)release capacity of 0.5AP-LMO//Ag system in simulated brine is 28.77 mg/(g h),which is 90.4%higher than ***,even in the more complex Zabuye real brine,0.5AP-LMO//Ag can still maintain excellent lithium extraction *** results indicate that the 0.5AP-LMO//Ag lithium-ion pump shows promising potential as a Li^(+)selective extraction system.

关键词： LiMn_(2)O_(4) Multifunctional AlPO_(4)coating Li^(+)embedment and de-embedment mechanism Stability Hydrophilicity Various solution

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Lignin-reinforced PVDF electrolyte for dendrite-free quasi-solid-state Li metal battery

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Rare Metals 2024年第3期43卷 1006-1016页

作者： Xin-Yang Chen Xue-Jie Gao Han-Yan Wu Yu-Long Liu Xiao-Fei Yang Run-Cang Sun Center for Lignocellulosic chemistry and Biomaterials College of Light Industry and Chemical EngineeringDalian Polytechnic UniversityDalian116034China Division of Energy Storage Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China school of chemistry Northeast Normal UniversityChangchun130024China

Quasi-solid-state lithium metal batteries(QSSLMBs)assembled with polyvinylidene fluoride(PVDF)are a promising class of next-generation rechargeable batteries due to their safety,high energy density,and superior interfacial ***,PVDF has a series of inherent drawbacks such as low ionic conductivity,ease of crystallization,and hydrophobic character that leading to poor cell *** tackle these issues,a lignin-reinforced PVDF electrolyte is proposed in this work to solve these drawbacks of PVDF and enhance the comprehensive performance of *** lithophilic polar groups of lignin can promote uniform deposition of Li on the *** with the improved mechanical properties can efficiently prevent Li dendrites penetration through the *** addition,more active sites provided by lignin can also enhance Li^(+)transport and lead to a faster electrochemical reaction *** from the ingenious design,Li symmetric cells with 5%lignin-PVDF quasi-solid-state electrolyte can operate for 900 h at a high current density/capacity of 5 mA·cm^(-2)/5 mAh·cm^(-2),while shortcircuiting occurs after 56 h for the counterpart(pure PVDF).Moreover,a full cell of Li/5%lignin-PVDF/LFP cell demonstrates a high capacity of 96.2 mAh·g^(-1)after 2000 cycles at 10 *** work is expected to open up promising opportunities to develop other high-energy/power-density QSSLMBs.

关键词： Quasi-solid-state electrolyte Lignin PVDF Dendrite-free Li metal battery

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Redox-Active Dihydrophenazine-Based Macrocycle:Synthesis,Conformation-Adaptive Behavior and Host-Guest Complexation with Tetracyanoquinodimethane

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Chinese Journal of chemistry 2024年第16期42卷 1895-1900页

作者： Qiong-Yan Hong Bin Huang Meng-Xiang Wu Lin Xu Xiao-Li Zhao Xueliang Shi Hai-Bo Yang Shanghai Key Laboratory of Green chemistry and chemical Processes State Key Laboratory of Petroleum Molecular&Process EngineeringSchool of Chemistry and Molecular EngineeringEast China Normal University3663 N.Zhongshan RoadShanghai 200062China

A novel macrocycle based on conformation-adaptive and electron-rich dihydrophenazine was designed and *** the one hand,the macrocycle showed host-guest interactions with tetracyanoquinodimethane(TCNQ)driving by charge transfer interaction between ***,host-guest complexation was accompanied by fluorescence quenching and conformational change of the *** the other hand,the oxidation of the macrocycle resulted in its diradical cation analogue and induced the release of the guest molecule TCNQ,thereby accomplishing reversible binding ***,this work wellillustrates the chemical and structural versatility of dihydrophenazine in the synthesis of macrocycles and their host-guest chemistry.

关键词： Dihydrophenazine Macrocycle Conformational adaptation Redox-active Host-guest interactions Charge transfer interaction Organic radical Supramolecular chemistry

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Efficient nitrate electroreduction over Mn-doped Cu catalyst via regulating N-containing intermediates adsorption configuration

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Science China chemistry 2024年第6期67卷 1969-1975页

作者： Limin Wu Shunhan Jia Libing Zhang Ruhan Wang Jiaqi Feng Xiaofu Sun Buxing Han Beijing National Laboratory for Molecular Sciences CAS Laboratory of Colloid and Interface and ThermodynamicsCAS Research/Education Center for Excellence in Molecular SciencesCenter for Carbon Neutral ChemistryInstitute of ChemistryChinese Academy of SciencesBeijing100190China school of chemical Sciences University of Chinese Academy of SciencesBeijing100049China College of chemical engineering and Environment China University of PetroleumBeijing102249China Shanghai Key Laboratory of Green chemistry and chemical Processes School of Chemistry and Molecular EngineeringEast China Normal UniversityShanghai200062China

The electrochemical reduction of NO_(3)^(-)to NH_(3)holds promise for economic and environmental benefits,presenting an energyefficient alternative to the traditional Haber-Bosch ***,challenges exist due to its sluggish kinetics,multiple intermediates,and various reaction *** this study,Mn-doped-Cu catalyst was synthesized and employed for electrochemical NO_(3)^(-)-to-NH_(3)*** doping of Mn into Cu resulted in exceptional performance,achieving a FE of 95.8%and an NH_(3)yield rate of 0.91 mol g^(-1)h^(-1)at-0.6 V in a neutral electrolyte at low NO_(3)^(-)*** experimental studies and theoretical calculations revealed that the Mn dopant enhanced the kinetic rate of NO_(2)~--to-NH_(3)and induced a distinct configuration of**** alteration decreased the energy barrier of*NO-to-*NOH,consequently promoting the conversion of NO_(3)^(-)-to-NH_(3).

关键词： nitrate reduction electrocatalysis ammonia synthesis N-intermediate green chemistry

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Designing Symmetric Gradient Honeycomb Structures with Carbon‑Coated Iron‑Based Composites for High‑Efficiency Microwave Absorption

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Nano-Micro Letters 2024年第11期16卷 224-241页

作者： Yu Zhang Shu‑Hao Yang Yue Xin Bo Cai Peng‑Fei Hu Hai‑Yang Dai Chen‑Ming Liang Yun‑Tong Meng Ji‑Hao Su Xiao‑Juan Zhang Min Lu Guang‑Sheng Wang school of chemistry Beihang UniversityBeijing 100191People’s Republic of China school of Electronics and Information Zhengzhou University of Light IndustryZhengzhou 450002People’s Republic of China school of chemical engineering Northeast Electric Power UniversityJilin 132000People’s Republic of China College of chemistry and Materials engineering Beijing Technology and Business UniversityBeijing 100048People’s Republic of China

The impedance matching of absorbers is a vital factor affecting their microwave absorption(MA)*** this work,we controllably synthesized Material of Institute Lavoisier 88C(MIL-88C)with varying aspect ratios(AR)as a precursor by regulating oil bath conditions,followed by one-step thermal decomposition to obtain carbon-coated iron-based *** the precursor MIL-88C(Fe)preparation conditions,such as the molar ratio between metal ions and organic ligands(M/O),oil bath temperature,and oil bath time,influenced the phases,graphitization degree,and AR of the derivatives,enabling low filler loading,achieving well-matched impedance,and ensuring outstanding MA *** MOF-derivatives 2(MD_(2))/polyvinylidene Difluoride(PVDF),MD_(3)/PVDF,and MD4/PVDF absorbers all exhibited excellent MA properties with optimal filler loadings below 20 wt%and as low as 5 wt%.The MD_(2)/PVDF(5 wt%)achieved a maximum effective absorption bandwidth(EAB)of 5.52 GHz(1.90 mm).The MD_(3)/PVDF(10 wt%)possessed a minimum reflection loss(RL_(min))value of−67.4 at 12.56 GHz(2.13 mm).A symmetric gradient honeycomb structure(SGHS)was constructed utilizing the high-frequency structure simulator(HFSS)to further extend the EAB,achieving an EAB of 14.6 GHz and a RL_(min) of−59.0 *** research offers a viable inspiration to creating structures or materials with high-efficiency MA properties.

关键词： MIL-88C(Fe) Fe/Fe_(3)O_(4)/Fe_(3)C@C Controllable preparation Symmetric gradient honeycomb structure Microwave absorbing

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Nanocarbon catalysts with co-active S−P−C sites enhance metal-free direct oxidation of alcohols

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SusMat 2024年第5期4卷 202-215页

作者： Juan Meng Huidong Liu Jianing Xu Yuhan Lou Haixin Sun Bo Jiang Yongzhuang Liu Hengfei Qin Shuo Dou Haipeng Yu Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education Northeast Forestry UniversityHarbinChina school of Resources and Environmental engineering Jiangsu University of TechnologyChangzhouChina school of Urban Construction Changzhou UniversityChangzhouChina College of chemistry Chemical Engineering and Resource UtilizationNortheast Forestry UniversityHarbinChina

In this study,a sulfur–phosphorus co-doped nanocarbon(SPC)catalyst was syn-thesized using a straightforward one-step colloidal carbonization method and demonstrated high performance in the metal-free direct oxidation of alcohols to *** metal-free SPC catalyst showed exceptional efficiency,achiev-ing a conversion rate of 90%for benzyl alcohol and a selectivity of 94%toward benzaldehyde within only 1 h at 130◦***,it displays exceptional cycle stability and a high turnover frequency(17.1×10-3 mol g-1 h-1).Theoretical analysis suggested that the catalyst’s superior performance is attributed to the presence of unsaturated edge defects and S-P-moieties,which increase the density of states at the Fermi level,lower the band gap energy,and promote electron ***,the doping introduces cooperative co-active S-P-C sites,facilitating a synergistic multisite catalytic effect that lowers the energy *** findings represent a significant advancement in the field of metal-free direct alcohol oxidation.

关键词： alcohol oxidation reaction carbon catalysts electronic structures

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Tuning electronic properties of cobalt phthalocyanines for oxygen reduction and evolution reactions

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Science China chemistry 2024年第1期67卷 398-407页

作者： Jianlin Jiang Zhen Liu Shuaijun Pan Xinnian Xia Bing Qin Yang Hu Xuxu Wang Jiamin Lan Yu Gu Encai Ou Weijian Xu Joseph J.Richardson Rui Guo SINOPEC Research Institute of petroleum Processing Co. Ltd.Beijing 100083China College of chemistry and chemical engineering Hunan UniversityChangsha 410082China College of chemistry and Materials Science Hunan Agricultural UniversityChangsha 410128China Department of chemical engineering The University of MelbourneParkville 3010Australia College of Environmental Science and engineering Hunan UniversityChangsha 410082China school of engineering RMIT UniversityMelbourneVictoria 3001Australia

Metal–phthalocyanines are a class of catalytically active materials promising in energy conversion and storage fields(e.g.,electrocatalysis).However,understanding and controlling the electrochemical properties in metal-phthalocyanine systems is ***,we elucidate the electrocatalytic origins of a series of cobalt-phthalocyanine molecular catalysts and finetune their electronic properties at the atomic level,both experimentally and *** interactions between the cobalt center and the local coordination environment are regulated by introducing either electron-donating or electron-withdrawing groups on the phthalocyanine ligand,and the spin-orbit splitting of cobalt is increased by~0.15 eV compared with the nonsubstituted ***,the aminated cobalt phthalocyanine-based electrocatalysts exhibit low free energies in the ratedetermining steps of the oxygen reduction(-1.68 eV)and oxygen evolution reactions(0.37 eV).This contributes to the high electrocatalytic activity(e.g.,a halfwave potential of 0.84 V and an overpotential of 0.30 V at 10 mAcm^(-2)),featuring a high selectivity of a four-electron pathway(i.e.,a negligible by-product of hydrogen peroxide).These catalysts also exhibit exceptional kinetic current density(Tafel slope of 100 mV dec^(-1))in oxygen reduction reactions,in addition to a superior power density(158 mWcm^(-2))and a high cycling stability(>1,300 cycles)in Zn-air batteries,outperforming the commercial Pt/C and/or RuO2counterparts.

关键词： interfacial wettability molecular catalysts carbon nanotubes density functional theory electrochemistry

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Recent advances in transition metal phosphide materials:Synthesis and applications in supercapacitors

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Nano Materials Science 2024年第2期6卷 174-192页

作者： Ge Li Yu Feng Yi Yang Xiaoliang Wu Xiumei Song Lichao Tan College of chemistry Chemical Engineering and Resource UtilizationNortheast Forestry University26 Hexing RoadHarbin150040PR China Institute of Carbon Neutrality Zhejiang Wanli UniversityNingbo315100PR China school of Materials Science and chemical engineering Harbin University of Science and TechnologyHarbin150040PR China

Supercapacitors(SCs)are considered promising energy storge systems because of their outstanding power density,fast charge and discharge rate and long-term cycling *** exploitation of cheap and efficient electrode materials is the key to improve the performance of *** the battery-type materials,transition metal phosphides(TMPs)possess high theoretical specific capacity,good electrical conductivity and superior structural stability,which have been extensively studied to be electrode materials for *** this review,we summarize the up-to-date progress on TMPs materials from diversified synthetic methods,diverse nanostructures and several prominent TMPs and their composites in application of *** the end,we also propose the remaining challenges toward the rational discovery and synthesis of high-performance TMP electrodes materials for energy storage.

关键词： Transition metal phosphides Cobalt phosphide Nickel phosphides Electrode materials Supercapacitor

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Synthesis of Pt/PMA-MIL-101 Catalyst and Its Performance in n-Heptane Isomerization

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China petroleum Processing & Petrochemical Technology 2024年第3期26卷 63-72页

作者： Zhang Wei Guo Qiang Wang Yingjun Suo Yanhua Lin Wenqiu Hu Tengyu Li Tong Liu Shetian Provincial Key Laboratory of College of Polyolefin New Materials College of Chemistry and Chemical EngineeringNortheast Petroleum UniversityDaqing 163318China College of chemical engineering and Technology Yantai Nanshan UniversityYantai 265706China

Hydroisomerization of n-heptane is an efficient method for producing gasoline with a high octane *** focus of this study was to find a highly efficient catalyst that could both promote the conversion of n-heptane and inhibit the cracking side ***-101(Cr)is a chromium-based metal-organic framework(MOF)with good hydrothermal stability,and exhibits a three-dimensional pore structure that is similar to that of *** phosphomolybdic acid(PMA;H3PMo12O40·xH2O)can increase the number of Brønsted acid sites on MIL-101(Cr),which contributes to improving the catalytic performance during *** this study,0.4%Pt/PMA-MIL-101(Cr)catalyst was successfully crystallized at 220℃using a hydrothermal synthetic *** results showed that the synthesized samples were mesoporousmicroporous composite materials with the typical octahedral structure,and the MIL-101(Cr)framework was not damaged following modification with *** was found that 0.4%Pt30%PMA-MIL-101(Cr)exhibited the best performance for isomerization of n-heptane,with a conversion rate and selectivity at 260°C of 47.6%and 96.6%,*** five hours of reaction,the conversion rate and selectivity of the catalyst remained above 38%and 80%,respectively.

关键词： MIL-101(Cr) n-heptane isomerization phosphomolybdic acid catalysis

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