检索结果-南通市图书馆

Estimating heat capacities of liquid organic compounds based on elements and chemical bonds contribution

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of chemical Engineering 2023年第5期57卷 30-38页

作者： Li Xia Yule Pan Tingting Zhao Xiaoyan Sun Shaohui Tao Yushi Chen Shuguang Xiang Institute of Process System Engineering College of Chemical EngineeringQingdao University of Science and TechnologyQingdao 266042China Petro-Cyber Works Information Technology company limited Shanghai Branch Shanghai 200120China

Molecular property depends on the property, the number of the elements, and the interaction between elements(such as chemical bonds). Based on the above-mentioned idea, two methods to estimate the isobaric heat capacity of liquids organic compounds were developed. Ten elements groups and 32 chemical bond groups were defined by considering the structure of organic compounds. The group contribution values and correlation parameters were regressed by the ridge regression method with the experiment data of 1137 compounds. The heat capacity can be calculated by summating the contributions of the elements and chemical bond groups. The two methods were compared with existing group contribution methods, such as Chickos, Zabransky-Ruzicka, and Zdenka Kolska. The results show that those new estimation methods' overall average relative deviations were 5.81% and 5.71%, which were lower than the other three methods. Those methods were more straightforward in compound *** new methods can be used to estimate the liquid heat capacity of silicon-containing compounds,which the other three methods cannot estimate. The new methods are more accessible, broader, and more accurate. Therefore, this research has important scientific significance and vast application prospects.

关键词： Thermodynamic Properties Model Prediction Elements and chemical Bonds

Development of a poly(arylene sulfide sulfone)antibacterial electrospun film as a skin wound dressing application

在线全文

学校读者我要写书评

暂无评论

Journal of Innovative Optical Health Sciences 2022年第2期15卷 32-41页

作者： Xuzhi Lang Zhurong Tang Zhimei Wei Xiaojun Wang Shengru Long Gang Zhang Jie Yang Qingyu Lin qingdao benzo chemical company limited qingdao 266300 P.R.China Institute of Life Sciences Chongqing Medical University Chongqing 400016P.R.China Institute of Materials Science and Technology Analytical&Testing Center Sichuan University Chengdu 610065P.R.China State Key Laboratory of Polymer Materials Engineering(Sichuan University) Chengdu 610065P.R.China School of Mechanical Engineering Research Center of Analytical Instrumentation Sichuan University Chengdu 610065P.R.China

Tissue engineering has become a hot issue for skin wound healing because it can be used as an alternative treatment to traditional *** films have been widely used due to their excellent *** this work,an organic/inorganic composite poly(arylene sulfide sulfone)/ZnO/graphene oxide(PASS/ZnO/GO)nanofibrous film was fabricated with the ZnO nano-particles blending in an electrospun solution and post-treated with the GO *** optimal PASS/ZnO/GO nanofibrous film was prepared by 2%ZnO nanoparticles,3.0g/mL PASS electrospun solution,and 1%GO dispersion *** morphology,hydrophilicity,mechanical property,and cytotoxicity of the PASS/ZnO/GO nanofibrous film were character-ized by using scanning electron microscopy,transmission electron microscope,water contact angle,tensile testing,and a Live/Dead cell staining *** is founded that the PASS/ZnO/GO nanofibrous film has outstanding mechanical properties and no ***,the PASS/ZnO/GO nanofibrous film exhibits excellent antibacterial activity to both Escherichia coli and Staphylococcus *** all,this high mechanical property in the non-toxic and antibacterial nanofibrous film will have excellent application prospects in skin wound dressing.

关键词： Graphene oxide electrospinning antibacterial skin wound dressing

Synthesis and mechanism of environmentally friendly high temperature and high salt resistant lubricants

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Petroleum Science 2023年第5期20卷 3110-3118页

作者： Zong-Lun Wang Jin-Sheng Sun Jing-Ping Liu Kai-He Lv Zi-Hua Shao Xian-Fa Zhang Zhe Xu Zhi-Wen Dai Ning Huang School of Petroleum Engineering China University of Petroleum(East China)Qingdao 266580ShandongChina CNPC Engineering Technology R&D company limited Beijing 102206China

With the exploration and development of deep and ultra-deep oil and gas,high torque and high friction during the drilling of deep and ultra-deep wells become one of the key issues affecting drilling safety and drilling ***,the high temperature and high salt problem in deep formations is prominent,which poses a major challenge to the lubricity of drilling fluids under high temperature and high *** paper reports an organic borate ester SOP as an environmentally friendly drilling fluid *** performance evaluation results show that when 1%lubricant SOP is added to the fresh water-based mud,the lubrication coefficient decreases from 0.631 to 0.046,and the reduction rate of lubrication coefficient is 92.7%.Under the conditions of 210℃ and 30%NaCl,the reduction rate of lubricating coefficient of the base slurry with 1%SOP was still remain 81.5%.After adding 1%SOP,the wear volume decreased by 94.11%compared with the base *** contact resistance experiment during the friction process shows that SOP can form a thick adsorption film on the friction surface under high temperature and high salt conditions,thus effectively reducing the friction *** dynamics simulation shows that lubricant SOP can be physically adsorbed on the surface of drilling tool and borehole wall through hydrogen bond and van der Waals *** analysis further shows that SOP adsorbs on the friction surface and reacts with metal atoms on the friction surface to form a chemically reactive ***,under high temperature and high salt conditions,the synergistic effect of physical adsorption film and chemical reaction film effectively reduces the frictional resistance and wear of the friction *** addition,SOP is non-toxic and easy to ***,SOP is a highly effective and environmentally friendly lubricant in high temperature and high salt drilling fluid.

关键词： Deep oil and gas Lubricant Environmentally friendly Water-based drilling fluid Molecular dynamics simulations

Polyisoprene Bearing Dual Functionalized Mini-blocky Chain-ends Prepared from Neodymium-mediated Coordinative Chain Transfer Polymerizations

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2023年第5期41卷 720-727,I0008页

作者： Wei-Xin Wang Wen-Peng Zhao Jing Dong Hua-Qiang Zhang Feng Wang Heng Liu Xue-Quan Zhang Key Laboratory of Rubber-Plastics Ministry of EducationShandong Provincial Key Laboratory of Rubber-PlasticsQingdao University of Science&TechnologyQingdao 266042China Petrochemical Research Institute PetroChinaBeijing 102206China School of chemical Engineering Changchun University of TechnologyChangchun 130012China

Through neodymium-mediated coordinative chain transfer copolymerizaiton(CCTcoP),polyisoprenes bearing dual hydroxylated mini-blocky chain-ends were prepared via a three-step *** studies revealed that,the polymerization demonstrated typical features of CCTcoP across the whole polymerization process,i.e.,quasi-living polymerization characteristic,tunable molecular weights,narrow molecular weight distributions,and atom *** to previously reported CCTP homopolymerization systems,the presence of oxygen-containing IpOAl polar comonomer slowed down chain transfer rates obviously,rendering slightly higher molecular weights of the resultant PIps and smaller Np(number of polymer chains per Nd atom)***,to mimic the structure of natural rubber,the hydroxyl end groups can be facilely modified into phosphonate,amide,and UPy,whose structures were further confirmed by NMR *** these functionalities could greatly improve the hydrophilic properties of the polymers,as revealed from the significantly reduced static water contact angles.

关键词： Functional polyisoprene Neodymium Coordinative chain transfer polymerization Synthetic rubber

Urea-assisted morphological engineering of MFI nanosheets with tunable b-thickness

在线全文

学校读者我要写书评

暂无评论

Nano Research 2023年第10期16卷 12196-12206页

作者： Qiudi Yue Chaowei Liu Hongjuan Zhao Honghai Liu Pierre Ruterana Jiaqi Zhao Zhengxing Qin Svetlana Mintova Laboratoire Catalyse et Spectrochimie ENSICAENUNICAENCNRSCaen 14050France Petrochemical Research Institute PetroChina Company LimitedBeijing 100195China Centre de Recherche sur les Ions les Matériaux et la PhotoniqueCIMAP-ENSICAENCNRS UMR 6252Caen 14050France State Key Laboratory of Heavy Oil Processing College of Chemical EngineeringChina University of Petroleum(East China)Qingdao 266580China

Engineering of crystal morphology affects the catalytic and adsorption properties of zeolitic *** the anisotropic diffusion of molecules derived from its topological features,MFI zeolite nanosheets with short b-axis thickness are highly desired materials to reduce diffusion ***,the design and development of eco-friendly synthesis protocols with reasonable cost and high efficiency remain ***,we reported a systematic study on the synthesis of MFI nanosheets using urea as an *** silicalite-1 and ZSM-5 zeolites(MFI type framework structure)with controllable b-thicknesses ranging from 50–200 nm were achieved by optimizing the synthetic parameters including water content,urea and SDA *** concentration of hydroxide anions was found to dominate the crystallization kinetics compared with the counterpart tetrapropylammonium cations(TPA^(+)).To facilitate the crystal growth of MFI zeolites in the presence of urea,the ratio OH−/SiO_(2)has to be higher than 0.2,independent of the TPA+*** role of urea in the assistance of plate-like crystal formation through the inhibition of(010)facet growth was revealed by electron microscopy and infrared(IR)spectroscopy *** developed strategy for morphological engineering is not limited to the MFI-type zeolite and can be applied to other frameworks depending on the intrinsic properties of additive molecules and the interactions between them.

关键词： MFI zeolite synthesis nanosheets additives crystal morphology

Characterization of Average Molecular Structure of Heavy Oil Fractions by ~1H Nuclear Magnetic Resonance and X-ray Diffraction

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China Petroleum Processing & Petrochemical Technology 2011年第3期13卷 1-7页

作者： Ren Wenpo Yang Chaohe Shan Honghong State Key Laboratory of Heavy Oil Processing China University of Petroleum Qingdao 266555 Petrochemical Research Institute PetroChina Company Limited Beijing 100195

The chemical structure of heavy oil fractions obtained by liquid-solid adsorption chromatography was character-ized by 1 H nuclear magnetic resonance and X-ray *** molecular weight and molecular formula of asphaltene molecules were estimated by combining 1 H nuclear magnetic resonance and X-ray diffraction analyses,and were also ob-tained from vapor pressure osmometry and elemental ***,such as S,N,and O atoms,were considered in the construction of average molecular structure of heavy *** important structural parameters were proposed,including the number of alkyl chain substituents to aromatic rings and the number of total rings with ***,the av-erage molecular structures of polycyclic aromatics,heavy resins and asphaltene molecules were *** number of α-,β-,γ-,and aromatic hydrogen atoms of the constructed average molecular structures fits well with the number of hydro-gen atoms derived from the experimental spectral data.

关键词： X射线衍射分析分子结构核磁共振平均表征重质油多环芳香烃组分

Investigation on the mechanism of adsorption and desorption behavior in cerium ions modified Y-type zeolite and improved hydrocarbons conversion

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2016年第12期34卷 1221-1227页

作者：张乐李强秦玉才张晓彤高雄厚宋丽娟 College of chemical Engineering China University of Petroleum(East China)Qingdao 266580China Liaoning Key Laboratory of Petrochemical Catalytic Science and Technology Liaoning Shihua UniversityFushun 113001China Research Institute of Petroleum and Petrochemical Petro China company limited Beijing 100083China

Different types of Y zeolites（HY, USY and Na Y） containing various amounts of cerium（Ce） were prepared with the method of liquid ion exchange and characterized by X-ray diffraction（XRD）, intelligent gravimetric analyzer（IGA）, and a molecular simulation technology（grand canonical Monte Carlo simulation, GCMC）. A novel calculation method of desorption index（DI） was proposed and the influence of cerium cationic species on the processes of adsorption-desorption of hydrocarbon molecules（n-octane） on the cerium modified Y zeolites（Ce Y） was studied. The results indicated that Ce ion species played a key role in reducing desorption activation energy of n-octane on Y type zeolites, leading to an improvement of the desorption ability of the Ce Y and the regulation of the adsorption state of n-octane from aggregation to decentralization. These findings are essential factors for enhancing the product selectivity of light hydrocarbon component and the catalytic activity of rare earth modified Y zeolites（REY） catalysts in fluid catalytic cracking（FCC） process.

关键词： catalysis Y zeolite adsorption model GCMC rare earth ion species

Effect of acid density of HZSM-5 on the oligomerization of ethylene in FCC dry gas

在线全文

学校读者我要写书评

暂无评论

Journal of Natural Gas Chemistry 2009年第2期18卷 156-160页

作者： Xue Ding Shan Geng Chunyi Li Chaohe Yang Guohui Wang State Key Laboratory of Heavy Oil Processing China University of Petroleum （East China） Qingdao 266555 Shandong China Daqing Refining ＆ chemical company CNPC Daqing 163411 Heilongjiang China

The oligomerization of ethylene in FCC dry gas over HZSM-5 catalyst with different Si/A12 ratios was studied. The effect of acid density of catalyst on the oligomerization of ethylene was discussed. By increasing the acid density of catalyst, ethylene conversion showed a linear increase, while the yields of olefins decreased when the acid density of catalyst exceeded 0.14mmolNH3/g owing to a promotion of hydrogen transfer reaction. Through comparing the average distance between acid sites on catalyst with kinetic diameters of olefins, it was found that the dimerization of ethylene was not restrained by the sparse distribution of acid sites, while the hydrogen transfer reaction of C3 and C4 olefins was limited. On these bases, a conclusion is proposed that the dimerization of ethylene proceeded via Eley-Rideal mechanism, while the hydrogen transfer reaction of C3 and C4 olefins followed the Langmuir-Hinshelwood mechanism.

关键词： ethylene oligomerization dry gas HZSM-5 mechanism

Synergistic mechanism between Bronsted acid site and active cerium species in hydride transfer reaction over CeY zeolites

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2020年第8期38卷 912-920,I0003页

作者： Jianhao Jiao Yucai Qin Jian Zheng Yu Hui Li Zhang Xionghou Gao Lijuan Song Key Laboratory of Petrochemical Catalytic Science and Technology Liaoning ProvinceLiaoning Shihua UniversityFushun 113001China College of Chemistry&chemical Engineering China University of Petroleum(East China)Qingdao 266555China Lanzhou Petrochemical Center Petrochemical Research InstitutePetroChina Company LimitedLanzhou 730060China

In this study,cyclohexene was used as a representative of olefin and catalyzed by CeY zeolites in a fixedbed reactor under mild conditions,and the influence of Ce species in hydride transfer reaction over CeY zeolites was *** zeolites show more excellent hydride transfer properties than HY *** on the results of almost identical Bronsted acid properties but not the product distributions for 0.075 CeY and 0.075 CeY(DC)samples,it should be suggested that the Bronsted acid strength and density are not the deciding factors to the hydride transfer reaction.A unique band at 1442 cm^-1 in situ FTIR spectroscopy spectra are assigned to pyridine complexes bonded to a class of active Ce species that could reversibly migrate from the core of SOD cages to its 6-rings mouth towards the *** results provide valuable information that these active Ce species should play a synergistic role with the Bronsted acid sites in enhancing the hydride transfer reaction with a bimolecular mechanism over CeY zeolites.

关键词： CeY zeolites Hydride transfer Synergistic mechanism Active Ce species Bronsted acid Rare earths