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| 1 | Transesterification of palm oil to biodiesel using Brφnsted acidic ionic liquid as high-efficient and eco-friendly catalyst显示文摘The transesterification of palm oil and methanol catalyzed by Br?nsted acidic ionic liquids was investigated. Four eco-friendly Br?nsted acidic ionic liquids were prepared and their structures were characterized by NMR, FT-IR and TG–DTG. The results demonstrated that [CyN_(1,1)PrSO_3H][p-TSA] was more efficient than the other ionic liquids and chosen as catalyst for further research. The influences of various reaction parameters on the conversion of palm oil to biodiesel were performed, and the orthogonal test was investigated to seek the optimum reaction conditions, which were illustrated as follows: methanol to oil mole ratio of 24:1, catalyst dosage of 3.0 wt% of oil, reaction temperature of 120 °C, reaction time of 150 min, and the biodiesel yield achieved 98.4%. In addition, kinetic study was established for the conversion process, with activation energy and preexponential factor of 122.93 k J·mol^(-1) and 1.83 × 10^(15), respectively. Meanwhile, seven-time recycling runs of ionic liquid were completed with ignorable loss of its catalyst activity. The refined biodiesel met the biodiesel standard EN 14214. | Yaoyao Feng Ting Qiu Jinbei Yang Ling Li Xiaoda Wang Hongxing Wang | 2017 | Chinese Journal of Chemical Engineering2017，25，9： | 4 |
| 2 | Influence of advection on the characteristics of turbulence over uneven surface in the oasis and the Gobi Desert显示文摘Utilizing experimental data of the atmospheric surface layer in the Gobi Oasis of Jinta in a comparative study, we demonstrate that under the condition of unstable stratification, the normalization variances of temperature in the oasis and Gobi Desert meet 1/3(z/Λ)(z/Λ)while normalization variances of both humidity and CO2 in the oasis meet(z)sz\Λ-1/3;s s z Λ the normalization variance of temperature in the oasis is large due to disturbance by advection, whereas variance of CO2 in the Gobi Desert has certain degree of deviation relative to Monin-Obukhov(M-O) scaling, and humidity variance completely deviates from variance M-O scaling. The above result indicates that under the condition of advection, humidity variance meets the relationsm sA sB D and it is determined by relative magnitude of scalar variance of advection transport. Our study reveals that, if the scalar variance of humidity or CO2 transported by advection is much larger than local scalar variance, observation value of scalar variance will deviate from M-O scaling; when scalar variance of advection transport is close to or less than local scalar variance, the observation value of scalar variance approximately meets M-O scaling. | CHEN JinBei HU YinQiao Lü ShiHua YU Ye | 2014 | Science China Earth Sciences2014，57，9： | 3 |
| 3 | Application of Bronsted acid ionic liquids as green catalyst in the synthesis of 2-propanol with reactive distillation显示文摘Five Br?nsted acidic ionic liquids(ILs) were prepared and characterized by FT-IR,~1H NMR and ^(13)C NMR. Their catalytic activities for the synthesis of 2-propanol(IPOH) via transesterification of isopropyl acetate(IPAc) with methanol(Me OH) were investigated. Among all the tested ILs, [Ps-mim]HSO_4 performed best and was used as catalyst for further studies. The reaction kinetics were carried out to correlate the parameters in a homogeneous second order kinetic model. It has been found that there is close agreement between the calculated and experimental values. The high-pressure batch reactive distillation experimental apparatus was set up in order to enhance the conversion of IPAc. A high conversion of IPAc of 99.4% was obtained under the optimal reaction conditions. The catalyst [Ps-mim]HSO_4 can be recycled easily by a rotary evaporator and reused without any further treatment. The catalyst had been repeatedly used for four times and no obvious changes in the structure of catalyst could be observed. | Jinbei Yang Dongren Cai Ting Zeng Lihua Zhou Ling Li Ruoyu Hong Ting Qiu | 2016 | Chinese Journal of Chemical Engineering2016，24，11： | 3 |
| 4 | Effect of traffic restriction on atmospheric particle concentrations and their size distributions in urban Lanzhou, Northwestern China显示文摘During the 2012 Lanzhou International Marathon, the local government made a significant effort to improve traffic conditions and air quality by implementing traffic restriction measures. To evaluate the direct effect of these measures on urban air quality, especially particle concentrations and their size distributions, atmospheric particle size distributions(0.5–20 μm) obtained using an aerodynamic particle sizer(model 3321, TSI, USA) in June 2012 were analyzed. It was found that the particle number, surface area and volume concentrations for size range 0.5–10 μm were(15.0±2.1) cm-3,(11.8±2.6) μm2/cm3and(1.9±0.6) μm2/cm3, respectively, on the traffic-restricted day(Sunday), which is 63.2%, 53.0% and 47.2% lower than those on a normal Sunday. For number and surface area concentrations, the most affected size range was 0.5–0.7 and 0.5–0.8 μm, respectively, while for volume concentration, the most affected size ranges were 0.5–0.8, 1.7–2.0 and 5.0–5.4 μm. Number and volume concentrations of particles in size range 0.5–1.0 μm correlated well with the number of non-CNG(Compressed Natural Gas) powered vehicles, while their correlation with the number of CNG-powered vehicles was very low, suggesting that reasonable urban traffic controls along with vehicle technology improvements could play an important role in improving urban air quality. | Suping Zhao Ye Yu Na Liu Jianjun He Jinbei Chen | 2014 | Journal of Environmental Sciences2014，26，2： | 2 |
| 5 | Antimicrobial, anticancer and DNA binding studies of transition metal(Ⅱ)complexes containing 2-phenyl-4-selenazole carboxylic acid显示文摘三新奇转变金属建筑群[ML2 (phen )] ?? | GUAN QuanYin SHI Xia SHEN JinBei ZHAO GuoLiang | 2013 | Science China Chemistry2013，56，5： | 2 |
| 6 | Effects of Low-Dose Olanzapine on Duloxetine-Related Nausea and Vomiting for the Treatment of Major Depressive Disorder显示文摘 | Zhiyong Zhong Yunqing Zhang Hongying Han Zheping Huang Jihui Wang Mingfeng Chen Jinbei Zhang | 2014 | Journal of Clinical Psychopharmacology2014，，4： | 1 |
| 7 | Adsorption thermodynamics and kinetics of Cr(VI)on KIP210 resin显示文摘 | Yang Jinbei Yu Meiqiong Qiu Ting | 2014 | Journal of Industrial and Engineering Chemistry2014，20，2： | 1 |
| 8 | Influence of Fiber Charac- teristics and Manufacturing Process on the Structure and Properties of Aramid Paper 显示文摘 | Zhao Huifang Zhang Meiyun Lu Jinbei | 2012 | Polymer-Plastics Technology and Engineering2012，51，2： | 1 |
| 9 | A Fluorescent Chemosensor for Al3+ Based on C=O Isomerization Derivated from Curcumin显示文摘 | Zhengyi Li Jinbei Yan Yue Yin Zhihui Zhang Zhiming Wang Defeng Xu Xiaoqiang Sun | 2016 | Chinese Journal of Chemistry2016，34，7： | 1 |
| 10 | Adsorption of hexavalent chromium from aqueous solution by activated carbon prepared from longan seed: Kinetics, equilibrium and thermodynamics 显示文摘 | YANG Jinbei YU Meiqiong CHEN Wentao | 2015 | Journal of Industrial & Engineering Chemistry2015，21，： | 1 |
| 11 | Asymptotic Analysis on Secrecy Capacity in Large-Scale Wireless Networks显示文摘 | Jinbei Zhang Luoyi Fu Xinbing Wang | 2014 | IEEE/ACM Transactions on Networking (TON)2014，，： | 1 |
| 12 | Influence of Fiber Characteristics and Manufacturing Process on the Structure and Properties of Aramid Paper显示文摘 | Zhao Huifang Zhang Meiyun Lu Jinbei | | 0，，02： | 1 |
| 13 | Adsorption thermodynamics and kinetics of Cr(VI) on KIP210 resin显示文摘 | Jinbei Yang Meiqiong Yu Ting Qiu | 2013 | Journal of Industrial and Engineering Chemistry2013，，： | 1 |
| 14 | Multi-site observation of large-scale eddies in the surface layer of the Loess Plateau显示文摘This article aims to build a theory of atmospheric boundary layer turbulence under complex conditions. To achieve this goal, we constructed a multi-site observation and analysis method of atmospheric turbulence based on related principles.This method first requires verification for the ergodicity of the full-scale observation of surface-layer turbulence, which proves that eddies within a scale of 60 min during a four-site observation can easily meet ergodicity. Meanwhile, by applying the second-order structure function for the horizontal wind speed turbulence of a single site and upstream and downstream points, we verified the ergodicity of the turbulence observation. Comparing the turbulence spectrum to the second-order structure function for the horizontal wind speed from the four-site observation, a relatively high accordance was observed, proving the reasonability of the multi-site observation. Moreover, compared to the single-site observation, the four-site observation can improve the estimation accuracy of the surface-layer turbulence spectrum and vertical turbulent flux. As a result, we can describe the threedimensional structure of turbulence more accurately and comprehensively by combining analytical data from single-site and four-site observations. In summary, the multi-site turbulence observation method shows that the horizontal and vertical wind turbulence of the Baimiao plateau has a typical structure of a turbulence spectrum with clear spectral gaps. The result is in accordance with the scale of the turbulence spectral gaps obtained from the 6 h data. The horizontal wind speed is under the influence of the terrain, so its spectrum of large-scale eddies has higher fluctuations, but its spectral gaps can still be clearly distinguished. Although the spectral gaps of the temperature spectrum are not distinguishable, they still have the same scale as the spectral gap of the vertical and horizontal turbulence spectrum. Moreover, the temperature spectrum possesses typical structure characteristics of the boundary-layer turbulence spectrum. | Jinbei CHEN Xiaowen CHEN Wei JIA Ye YU Suping ZHAO | 2023 | Science China Earth Sciences2023，66，4： | 0 |
| 15 | Direct observation of intramolecular coplanarity regulated polymorph emission of a tetraphenylethene derivative显示文摘Polymorphism makes it possible to clarify the relationship between emission property and crystal structure.However,based on the exact molecular conformation in tetraphenylethene polymorphisms,it is still challenging to evaluate the difference of intramolecular coplanarity without the support of calculation because of the complex combination of four different torsion angles between four peripheral benzenes and the central ethylene plane.Here,by using a di-formyl-functionalized tetraphenylethene derivative,two ideal polymorphisms with a consistent trend of the corresponding torsion angles have been obtained.For the first time,we explicitly demonstrated that intramolecular coplanarity is the underlying cause of the polymorphism-dependent emission of tetraphenylethene derivatives. | Qingkai Qi Shan Jiang Qinglong Qiao Jinbei Wei Bin Xu Xiaocun Lu Zhaochao Xu Wenjing Tian | 2020 | Chinese Chemical Letters2020，31，11： | 0 |
| 16 | Suppressing Competitive Coordination Reaction for Ohmic Cathode Contact Using Amino-Substituted Organic Ligands and Air-Stable Metals显示文摘Ohmic cathode contact can be formed readily via coordination-activated n-doping(CAN),by co-evaporating air-stable metals(e.g.,silver)and organic ligands with coordination sites.It has been proposed that increasing the nucleophilicity of the main binding site of a ligand is essential for reducing the work function of the doped films. | Yang Lu Ziyang Liu Yuewei Zhang Chen Zhang Jinbei Wei Zhengyang Bin Xuewen Wang Dongdong Zhang Lian Duan | 2021 | CCS Chemistry2021，3，12： | 0 |
| 17 | Ergodicity of turbulence measurements upon complex terrain in Loess Plateau显示文摘To display the distribution characteristics of turbulence eddy under condition of complex terrain in Loess Plateau,and to enhance the precision of turbulence measurements,the research of turbulence ergodicity is considered to be the prior section of the experiment.With the statistics of single-site turbulence measurements obtained in Baimiao Tableland,Ping Liang,Gan Su,analysis result shows that not only the turbulence with scale less than 10 min,which can easily satisfy the ergodicity,the tableland terrain can also be a major cause of the coherent structure of periodic,large-scale turbulence;compared to which for the turbulence above the flat underlying surface,the distribution of 10–40 min,large-scale turbulence in the tableland region tends to be more steady and,thus,can also satisfy the ergodicity easily.Under the condition of extremely unstable stratification,the wind is comparatively low in speed and features distinctly large-scale,periodical fluctuation,and with the trend of smooth increase in temperature,large-scale wind turbulence and temperature turbulence both tend to satisfy ergodicity.In comparison,under the condition of extremely stable stratification,the aperiodicity of large-scale wind turbulence and temperature turbulence caused by intermittency is comparatively strong,and the turbulence cannot satisfy ergodicity easily. | Jinbei CHEN Xiaowen CHEN Xiaojun JING Wei JIA Ye YU Suping ZHAO | 2021 | Science China Earth Sciences2021，64，1： | 0 |
| 18 | Experimental demonstration of the coupling effect of vertical velocity on latent heat flux显示文摘According to the cross coupling theorem of atmospheric turbulence, latent heat flux comprises two components, a vertical humidity gradient flux and a coupling flux of vertical velocity. In this paper, observational data are employed to demonstrate and analyze the coupling effect of vertical velocity on latent heat flux. The results highlight the presence of a coupling zero-effect height. When the observational level exceeds or underlies the coupling zero-effect height, the coupling effect suppresses or enhances the latent heat flux, respectively. Above the heterogeneous terrain in the experimental region, the overall difference between the estimated and the observed latent heat fluxes decreases from 27% to 2% (for ascending flow) and from 47% to 28% (for descending flow), after compensating for gradient flux. The coupling theorem of atmospheric turbulence is well validated by our analysis, supporting a role for experimental datasets in unraveling the mysteries of atmospheric turbulence. | CHEN JinBei HU YinQiao Lü ShiHua YU Ye | 2013 | Science China Earth Sciences2013，56，4： | 0 |
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