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| 1 | A review on the application of nanofluids in enhanced oil recovery显示文摘Enhanced oil recovery(EOR)has been widely used to recover residual oil after the primary or secondary oil recovery processes.Compared to conventional methods,chemical EOR has demonstrated high oil recovery and low operational costs.Nanofluids have received extensive attention owing to their advantages of low cost,high oil recovery,and wide applicability.In recent years,nanofluids have been widely used in EOR processes.Moreover,several studies have focused on the role of nanofluids in the nanofluid EOR(N-EOR)process.However,the mechanisms related to N-EOR are unclear,and several of the mechanisms established are chaotic and contradictory.This review was conducted by considering heavy oil molecules/particle/surface micromechanics;nanofluidassisted EOR methods;multiscale,multiphase pore/core displacement experiments;and multiphase flow fluid-solid coupling simulations.Nanofluids can alter the wettability of minerals(particle/surface micromechanics),oil/water interfacial tension(heavy oil molecules/water micromechanics),and structural disjoining pressure(heavy oil molecules/particle/surface micromechanics).They can also cause viscosity reduction(micromechanics of heavy oil molecules).Nanofoam technology,nanoemulsion technology,and injected fluids were used during the EOR process.The mechanism of N-EOR is based on the nanoparticle adsorption effect.Nanoparticles can be adsorbed on mineral surfaces and alter the wettability of minerals from oil-wet to water-wet conditions.Nanoparticles can also be adsorbed on the oil/water surface,which alters the oil/water interfacial tension,resulting in the formation of emulsions.Asphaltenes are also adsorbed on the surface of nanoparticles,which reduces the asphaltene content in heavy oil,resulting in a decrease in the viscosity of oil,which helps in oil recovery.In previous studies,most researchers only focused on the results,and the nanoparticle adsorption properties have been ignored.This review presents the relationship between the adsorption properties of nanoparticles and the N-EOR mechanisms.The nanofluid behaviour during a multiphase core displacement process is also discussed,and the corresponding simulation is analysed.Finally,potential mechanisms and future directions of N-EOR are proposed.The findings of this study can further the understanding of N-EOR mechanisms from the perspective of heavy oil molecules/particle/surface micromechanics,as well as clarify the role of nanofluids in multiphase core displacement experiments and simulations.This review also presents limitations and bottlenecks,guiding researchers to develop methods to synthesise novel nanoparticles and conduct further research. | Jinjian Hou Jinze Du Hong Sui Lingyu Sun | 2022 | Frontiers of Chemical Science and Engineering2022，16，8： | 1 |
| 2 | Efficient Simultaneous Detection of Metabolites Based on Electroenzymatic Assembly Strategy显示文摘Objective and Impact Statement:We describe an electroenzymatic mediator(EM)sensor based on an electroenzymatic assembly peak separation strategy,which can efficiently realize the simultaneous detection of 3 typical cardiovascular disease(CVD)metabolites in 5μl of plasma under one test.This work has substantial implications toward improving the efficiency of chronic CVD assessment.Introduction:Monitoring CVD of metabolites is strongly associated with disease risk.Independent and time-consuming detection in hospitals is unfavorable for chronic CVD management.Methods:The EM was flexibly designed by the cross-linking of electron mediators and enzymes,and 3 EM layers with different characteristics were assembled on one electrode.Electrons were transferred under tunable potential;3 metabolites were quantitatively detected by 3 peak currents that correlated with metabolite concentrations.Results:In this study,the EM sensor showed high sensitivity for the simultaneous detection of 3 metabolites with a lower limit of 0.01 mM.The linear correlation between the sensor and clinical was greater than 0.980 for 242 patients,and the consistency of risk assessment was 94.6%.Conclusion:Metabolites could be expanded by the EM,and the sensor could be a promising candidate as a home healthcare tool for CVD risk assessment. | Anran Zheng Chao Li Shengkai Xu Zhen Guo Chuanyu Li Changsong Zhang Jia Yao Zhiqi Zhang Jinze Li Lutao Du Shasha Zhao Chuanxin Wang Wei Zhang Lianqun Zhou | 2023 | Biomedical Engineering Frontiers2023，4，1： | 0 |
| 3 | Emergent leader-follower relationship in networked multiagent systems显示文摘Understanding the collective dynamics of leader-follower systems is a crucial and challenging issue.Previous studies have a priori designated leaders.However,the leaderfollower relationship is self-organized in human society over time and social interactions[1]. | Jinzhuo LIU Chenyou FAN Yunchen PENG Jinze DU Zhen WANG Chen CHU | 2023 | Science China(Information Sciences)2023，66，12： | 0 |
| 4 | Particulate Amines in the Background Atmosphere of the Yangtze River Delta,China:Concentration,Size Distribution,and Sources显示文摘Amines are important for new particle formation and subsequent growth in the atmosphere.Consequently,the processes involved are receiving more attention in recent years.Here,we conduct a field observation in order to investigate the atmospheric particulate amines at a background site in the Yangtze River Delta(YRD)during the summer of 2018.Four amines in PM_(2.5),i.e.,methylamine(MA),dimethylamine(DMA),diethylamine(DEA),and trimethylamine(TMA),were collected,twice daily and analyzed.During the campaign,our measurements found the concentrations of MA,DMA,DEA,and TMA of 15.0±15.0,6.3±6.9,20.4±30.1,and 4.0±5.9 ng m^-(3),respectively,and the four amines correlated well with each other.The concentration of amines appear to be independent of whether they were collected during the day or night.Both MA and DMA exhibited a bimodal size distribution that had peaks at 0.67 and 1.1μm,suggesting amines preferably distribute on submicron particles.Boundary layer height(BLH),relative humidity,and pH of aerosols were found have a negative relationship with amines,while aerosol liquid water content(ALWC)was found to have a positive relationship with amines.The PMF(positive matrix factorization)source apportionment results showed that the main source of amines in Chongming Island was of anthropogenic origin such as industrial and biomass emission,followed by marine sources including sea salt and marine biogenic sources.Given that the YRD region is still suffering from complex atmospheric pollution and that the knowledge on aerosol amines is still limited,more field studies are in urgent need for a better understanding of the pollution characteristics of amines. | Wei DU Xinpei WANG Fengqin YANG Kaixu BAI Can WU Shijie LIU Fanglin WANG Shaojun LV Yubao CHEN Jinze WANG Wenliang LIU Lujun WANG Xiaoyong CHEN Gehui WANG | 2021 | Advances in Atmospheric Sciences2021，38，7： | 0 |
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