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Chinese Journal of Chemical Engineering 2019年第2期27卷 400-404页

作者： Hongrui Ren Jibin Song Qinqin Xu jianzhong yin State Key Laboratory of Fine Chemical School of Chemical Machinery Dalian University of Technology

Solubility of the silver nitrate in the supercritical carbon dioxide containing ethanol and ethylene glycol as double cosolvents was measured under certain pressure and temperature range(10–25 MPa, 323.15–333.15 K). The impact of the pressure and temperature on the solubility was also investigated. Based on the experiment data,a correlation model concerning solid's solubility in supercritical fluids was established by combining the solubility parameter with the thermodynamic equation when a binary interaction parameter and a mixed solvent solubility parameter were defined. Experiments show the solubility of AgNO_3 increases with the pressure at a certain temperature. However, the influence of temperature is related to a pressure defined as the turnover pressure(12.3 MPa). When the pressure is higher(or lower) than this turnover pressure, silver nitrate's solubility shows increasing(or decreasing) trend as the temperature rises. Satisfactory accuracy of our presented model was revealed by comparing experimental data with calculated results.

关键词： Supercritical carbon dioxide Silver nitrate Solubility parameter Correlation model

Numerical investigation of film forming characteristics and mass transfer enhancement in horizontal polycondensation kettle

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Chinese Journal of Chemical Engineering 2023年第11期63卷 31-42页

作者： Xupeng Chen Jintao Wu Jianfei Sun Kunpeng Yu jianzhong yin State Key Laboratory of Fine Chemicals School of Chemical EngineeringDalian University of TechnologyDalian 116024China

The process of producing high viscosity polyester by transesterification polycondensation needs to adjust the operating conditions and equipment structure of pre-polycondensation kettle and final polycondensation kettle to realize process *** view of this,the fluid volume function method of computational fluid dynamics numerical simulation was used to investigate the film formation and surface renewal characteristics of horizontal polycondensation kettle under different operating conditions,including viscosity,rotating speed and liquid *** results show that the viscosity and rotating speed were positively correlated with the film area and surface renewal in the pre-polycondensation ***,increasing the viscosity by several orders of magnitude in the final polycondensation kettle,the larger the film area and film thickness,but the overall surface renewal of the disk ***,a hexagonal hole disk is *** comparison,it is found that the film is more uniform,the surface update frequency is higher,and the power consumption can be reduced by more than 20%.

关键词： Pre-polycondensation kettle Final polycondensation kettle Film forming characteristic Surface renewal Numerical simulation

Molecular dynamics simulation of supercritical CO2 microemulsion with ionic liquid domains: Structures and properties

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Chinese Journal of Chemical Engineering 2019年第11期27卷 2653-2658页

作者： Hongyue Zhu ying Li Hongrui Ren Dan Zhou jianzhong yin State Key Laboratory of Fine Chemicals School of Chemical Machinery and SafetyDalian University of TechnologyDalian 116024China

Supercritical carbon dioxide microemulsions are great medium to combine two immiscible substances through forming nanoscale polar cores in nonpolar continuous phase with the help of proper surfactants. The properties of microemulsions could be significantly affected by their constituents and structures. In this work, molecular dynamics simulation was implemented to study supercritical carbon dioxide microemulsions containing ionic liquid [bmim][PF6] and water by adding surfactant Ls-36. Results showed that the above components could form spherical aggregates in CO2 bulk phase with [bmim][PF6] and some water as the inner core, surfactant headgroups and water as the intermediate shell, and surfactant tails as the outer shell. The microstructure information about the outer shell was further investigated by defining an angle between the surfactant tail and the normal direction of the aggregate outer surface, which ranged from 78° to 125°. The influence of the ionic liquid content on the size and structure of microemulsions was explored and the best molar ratio between the ionic liquid and surfactant was around 1.25 for getting maximum water solubility.

关键词： Molecular simulation Supercritical carbon dioxide microemulsion Ionic liquids Microstructure Structure parameters

Heat transfer model of two-phase flow across tube bundle in submerged combustion vaporizer

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Chinese Journal of Chemical Engineering 2019年第3期27卷 613-619页

作者： Jiajun Song Dongyan Han Qinqin Xu Dan Zhou jianzhong yin State Key Laboratory of Fine Chemicals School of Chemical Machinery and SafetyDalian University of Technology

In order to optimize the design of the submerged combustion vaporizer(SCV), an experimental apparatus was set up to investigate the heat transfer character outside the tube bundle in SCV. Several experiments were conducted using water and CO_2 as the heat transfer media in the tubes, respectively. The results indicated that hot air flux, the initial liquid level height and the tube pitch ratio had great influence on the heat transfer coefficient outside the tube bundle(ho). Finally, the air flux associated factor β and height associated factor γ were introduced to propose a new hocorrelation. After verified by experiments using cold water, high pressure CO_2 and liquid N_2 as heat transfer media, respectively, it was found that the biggest deviation between the predicted and the experimental values was less than 25%.

关键词： Submerged combustion vaporizer Fluid sweeping tube bundle Two-phase flow Heat transfer coefficient Modeling

Solubility of iron(Ⅲ) and nickel(Ⅱ) acetylacetonates in supercritical carbon dioxide

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Chinese Journal of Chemical Engineering 2024年第1期65卷 29-34页

作者： Haixin Sun Jianlei Qi Jianfei Sun Lin Li Kunpeng Yu Jintao Wu jianzhong yin State Key Laboratory of Fine Chemicals School of Chemical EngineeringDalian University of TechnologyDalian 116024China College of Chemical Engineering Inner Mongolia University of TechnologyHohhot 010051China

As a common precursor for supercritical CO_(2)(scCO_(2))deposition techniques,solubility data of organometallic complexes in scCO_(2)is crucial for the preparation of ***,metal acetylacetonates have shown great potential for the preparation of single-atom catalytic *** this study,the solubilities of iron(Ⅲ)acetylacetonate(Fe(acac)3)and nickel(Ⅱ)acetylacetonate(Ni(acac)2)were measured at the temperature from 313.15 to 333.15 K and in the pressure range of 9.5–25.2 MPa to accumulate new solubility *** was measured using a static weight loss *** semi-empirical models proposed by Chrastil and Sung et *** used to correlate the solubility data of Fe(acac)3 and Ni(acac)*** equations obtained can be used to predict the solubility of the same system in the experimental range.

关键词： Iron(III)acetylacetonate Nickel(II)acetylacetonate Supercritical carbon dioxide Solubility measurement Correlation model Phase equilibrium

Tuning the coordination environment of single-atom catalyst M-N-C towards selective hydrogenation of functionalized nitroarenes

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Nano Research 2022年第1期15卷 519-527页

作者： Dan Zhou Leilei Zhang Xiaoyan Liu Haifeng Qi Qinggang Liu Ji Yang Yang Su Jingyuan Ma jianzhong yin Aiqin Wang School of Chemical Engineering State Key Laboratory of Fine ChemicalsDalian University of TechnologyDalian 116024China CAS Key Laboratory of Science and Technology on Applied Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Shanghai Synchrotron Radiation Facility Zhangjiang Laboratory(SSRFZJLab)Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China

Fine-tuning of the coordination environment of single-atom catalysts(SACs)is effective to optimize their catalytic performances,yet it remains challenging due to the vulnerability of ***,we report a new approach to engineering the coordination environment of M-N-C(M=Fe,Co,and Ni)SACs by using glutamic acid as the N/C source and pyrolysis atmosphere as a *** with that in N2,NH3 was able to promote the doping of N at 7<700℃yet etch the N-species at higher temperatures,by which the M-N coordination number(CN)and the electronic structure were delicately *** was found that the electron density of Ni single atoms increased with the decrease of Ni-N *** a consequence,the capability of Ni-N-C to dissociate H2 was greatly enhanced and a higher catalytic activity in chemoselective hydrogenation of functionalized nitroarenes was ***,this modulation method could be applied to other transition metals including Fe and *** particular,the as-synthesized Co-N-C SAC afforded a turnover frequency of 152.3 h~1 with 99%selectivity to 3-vinylaniline in the hydrogenation of 3-nitrostyrene,which was the highest ever reported thus far and was at least one order of magnitude more active than state-of-the-art noble-metal-free M-N-C catalysts,demonstrating the great potential of engineering the coordination environment of SACs.

关键词： single-atom catalysts coordination environment Ni-N-C chemoselective hydrogenation pyrolysis atmosphere

Reorganization characteristics of speech cortex during speech restoration following total laryngectomy A functional magnetic resonance imaging follow-up

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Neural Regeneration Research 2011年第11期6卷 834-838页

作者： jianzhong yin Yonggang Xue Peng Lin Xuchu Weng Ji Qi Department of Radiology Tianjin First Central Hospital First Central Clinical College of Tianjin Medical University Tianjin 300192 China Department of Otolaryngology Tianjin First Central Hospital First Central Clinical College of Tianjin Medical University Tianjin 300192 China Institute of Psychology Chinese Academy of Sciences Beijing 100101 China

During speech restoration following laryngectomy, language-related cortical areas develop connections with new primary motor neurons. The present study followed up 18 patients after total resection of laryngeal carcinoma. According to an evaluation of pronunciation, patients were assigned to three groups： poor, moderate and good pronunciation. Functional magnetic resonance imaging revealed significant increases in the number of activated voxels and the intensity of activation changes in the left middle frontal gyrus, left precentral gyrus, left postcentral gyrus, left supplementary motor area, left anterior cingulate gyrus and right fusiform gyrus between the moderate pronunciation group compared with the poor and good pronunciation groups. We propose that these brain regions play an important role in the progress of speech restoration, and improvements in pronunciation learning for patients following laryngectomy. However, during the later period of speech restoration, the number of activated voxels and intensity changes in these regions decreased to the level of healthy controls, indicating that the learning and instruction effects weakened once patients had mastered pronunciation techniques

关键词： magnetic resonance imaging functional laryngeal carcinoma laryngectomy language training neuroplasticity

含CO_2/离子液体系统相行为及其在反应与分离中的应用进展

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化学进展 2008年第4期20卷 441-449页

作者：王伟彬银建中大连理工大学化工学院大连116012

目前已知的绿色溶剂主要包括超临界流体(supercritical fluids,SCFs)、离子液体(ionic liquids,ILs)、二氧化碳膨胀液体(CO2expanded liquids,CXLs)、水以及上述溶剂的混合物等。其中,由超临界CO2(supercritical CO2,SCCO2)与IL混合而构成的新型溶剂,因为化学热力学方面的特性,成为近年来研究的热点,未来很有发展前景。本文回顾了目前为止在该领域所开展的工作,总结了影响SCCO2与ILs相行为的主要因素,包括温度、压力I、Ls的含水量I、Ls的阴离子I、Ls的阳离子I、Ls的摩尔体积以及助溶剂等。同时分析了ILs/SCCO2与溶质形成的多元混合物相行为的成因。介绍了ILs/CO2在萃取、反萃取、膜分离、反胶束、萃取与反应耦合等方面的应用。由于传统的单元操作很难满足无污染和对过程集成的要求,因而含有ILs/SCCO2的分离反应耦合过程将是未来实现清洁生产的发展方向。

关键词：超临界CO2 离子液体相行为反应分离过程耦合

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成人急性复杂型阑尾炎的临床病理特点

中华外科杂志 2014年第5期52卷 338-341页

作者：赵轶国印建中北京大学第一医院急诊外科 100034

目的探讨成人急性复杂型阑尾炎的临床特征.方法回顾性分析2003年1月至2012年12月手术切除的742例急性阑尾炎病例,根据术后病理结果分为急性单纯性阑尾炎组和急性复杂型阑尾炎组.比较2组患者的一般情况、临床表现、体检结果、实验室检... 详细信息

目的探讨成人急性复杂型阑尾炎的临床特征.方法回顾性分析2003年1月至2012年12月手术切除的742例急性阑尾炎病例,根据术后病理结果分为急性单纯性阑尾炎组和急性复杂型阑尾炎组.比较2组患者的一般情况、临床表现、体检结果、实验室检查及影像学检查结果,寻找急性复杂型阑尾炎的临床规律.结果本组患者中急性复杂型阑尾炎533例（71.8％）,病理类型包括急性化脓性阑尾炎306例,急性蜂窝织性阑尾炎57例,阑尾穿孔59例,急性坏疽性阑尾炎100例,阑尾穿孔伴脓肿形成6例,阑尾炎合并肿瘤5例.较之单纯性阑尾炎,成人急性复杂型阑尾炎入院时白细胞计数更高（t=-7.142,P=0.000）,体检发现腹肌紧张者较多（χ^2=10.646,P=0.000）,B超或CT提示阑尾内有粪石嵌顿（χ^2=16.759,P=0.000）、右下腹局部积液者较多（χ^2=13.531,P=0.000）.多因素Logistic回归分析表明,无阑尾炎病史（OR=0.593,95％CI：0.373～0.942）、白细胞计数高于20×10^9/L（OR =2.717,95％ CI：1.834 ～4.027）、腹肌紧张（OR=1.649,95％CI：1.047～2.597）、B超或CT发现阑尾内粪石嵌顿（OR=2.939,95％CI：1.607～5.377）及阑尾周围积液（OR=3.273,95％CI：1.424 ～7.525）是成人急性复杂型阑尾炎的主要危险因素（P＜0.05）.结论白细胞计数显著增高、腹部体检触及肌紧张、影像学检查发现阑尾粪石或阑尾周围积液对鉴别成人急性单纯性和复杂型阑尾炎有较大意义.

关键词：阑尾炎阑尾切除术因素分析,统计学

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循环经济实践的基本类型分析

山东师范大学学报（人文社会科学版） 2005年第6期50卷 75-78页

作者：尹建中山东师范大学省可持续发展研究中心山东济南250014

加快我国循环经济发展,应在已有生态经济理论与实践的基础上,通过对我国资源综合利用、清洁生产、生态农业、生态工业、区域循环经济试点示范的典型案例剖析,揭示符合国情的循环经济框架体系,包括农业循环经济、工业循环经济、服务业废... 详细信息

加快我国循环经济发展,应在已有生态经济理论与实践的基础上,通过对我国资源综合利用、清洁生产、生态农业、生态工业、区域循环经济试点示范的典型案例剖析,揭示符合国情的循环经济框架体系,包括农业循环经济、工业循环经济、服务业废弃物循环利用、区域(城市)循环经济的发展模式以及市场驱动机制、技术支撑体系和调控管理模式,并应因地制宜选择重点行业、重点区域的重点企业、园区和城市,以试点示范建设加以推动。

关键词：农业循环经济工业循环经济服务业废弃物循环利用区域(城市)循环经济基本类型