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Computer-aided ionic liquid design for alkane/cycloalkane extractive distillation process

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Green Energy & Environment 2019年第2期4卷 154-165页

作者： Zhen Song xinxin Li He Chao Fan Mo Teng Zhou Hongye cheng Lifang Chen Zhiwen Qi State Key Laboratory of Chemical Engineering School of Chemical Engineering East China University of Science and Technology Process Systems Engineering Max Planck Institute for Dynamics of Complex Technical Systems

A computer-aided ionic liquid design(CAILD) study is presented for the frequently encountered alkane/cycloalkane separations in petrochemical industry. Exhaustive experimental data are first collected to extend the UNIFAC-IL model for this system, where the proximity effect in alkanes and cycloalkanes is considered specifically by defining distinct groups. The thermodynamic performances of a large number of ILs for 4 different alkane/cycloalkane systems are then compared to select a representative example of such separations. By applying n-heptane/methylcyclohexane extractive distillation as a case study, the CAILD task is cast as a mixed-integer nonlinear programming(MINLP) problem based on the obtained task-specific UNIFAC-IL model and two semi-empirical models for IL physical properties. The top 5 IL candidates determined by solving the MINLP problem are subsequently introduced into Aspen Plus for process simulation and economic analysis, which finally identify 1-hexadecyl-methylpiperidinium tricyanomethane([C_(16)MPip][C(CN)_3]) as the best entrainer for this separation.

关键词： CAILD Alkane/cycloalkane extractive distillation UNIFAC-IL MINLP Process performance and economics

Bioconversion of lignocellulosic biomass into bacterial nanocellulose:challenges and perspectives

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Green Chemical Engineering 2023年第2期4卷 160-172页

作者： Wenchao Li Yuqing Shen Huan Liu xinxin Huang Bin Xu cheng Zhong Shiru Jia State Key Laboratory of Food Nutrition&Safety Tianjin University of Science&Technology300457TianjinChina Key Laboratory of Industrial Fermentation Microbiology(Ministry of Education) Tianjin University of Science&Technology300457TianjinChina

Nanocellulose has various outstanding properties and great potential for replacing petrochemical *** utilization of lignocellulose to produce nanocellulose is of great significance to the sustainable development of the economy and ***,the direct extraction of nanocellulose from lignocellulose by chemical method is challenged by toxic chemicals utilization,energy and time consumption,and waste water ***,this paper addressed the conversion of lignocellulosic biomass into bacterial nanocellulose(BNC)by the biological ***,this article highlights the recent advances in potentials and challenges of lignocellulosic biomass for BNC production through the bioconversion process,including biomass pretreatment,enzymatic hydrolysis,glucose and xylose fermentation,GA accumulation,and inhibitor *** development in metabolic and evolutionary engineering to enhance the production capacity of BNC-producing strain is also *** is expected to provide guidance on the effective bioproduction of nanocellulose from lignocellulosic biomass.

关键词： Bioconversion Lignocellulose Bacterial nanocellulose Pretreatment Fermentation

Effect of ethylene vinyl acetate content on the performance of VMD using HDPE co-blending membrane

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Chinese Journal of Chemical Engineering 2019年第5期27卷 1058-1066页

作者： Na Tang xinxin Hua Zhao Li Lei Zhang Jiating Wang Jun Xiang Penggao cheng Xuekui Wang College of Chemical Engineering and Materials Science Tianjin University of Science & TechnologyTianjin 300457China Tianjin Key Laboratory of Marine Resources and Chemistry Tianjin University of Science & TechnologyTianjin 300457 China

Membranes were fabricated with high-density polyethylene (HDPE) and ethylene vinyl acetate (EVA) blend through thermally induced phase separation and were then used for vacuum membrane distillation (VMD). The membranes were supported by non woven polyester fabric with a special cellular structure. Different membrane samples were obtained by adjusting the polymer concentration, HDPE/EVA weight ratio, and coagulation bath temperature. The membranes were characterized by scanning electron microscopy (SEM) analysis, contact angle test, and evaluation of porosity and pore size distribution. A series of VMD tests were conducted using aqueous NaCI solution (0.5 mol·L^-1) at a feed temperature of 65 ℃ and permeate side absolute pressure of 3 kPa. The membranes showed excellent performance in water permeation flux, salt rejection, and long-term sta-bility. The HDPE/EVA co-blending membranes exhibited the largest permeation flux of 23.87 kg·m^-2·h^-1, and benign salt rejection of ≥99.9%.

关键词： Thermally induced phase separation High-density polyethylene Ethylene vinyl acetate Membrane Separation Microstructure

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饮用水硬度详述及其对口感健康影响分析

食品工业 2023年第6期44卷 148-152页

作者：高文海张彦菊程欣欣孙婷华晓李劲松济南水务集团有限公司济南250000

多数饮用者对水垢的认知存在局限性,认为水垢的存在威胁身体健康,尽管水垢的成分,即钙镁离子本身对人体并无害处。通过对水质投诉数据分析,多数饮用者由于水垢的状态、水垢增加了水的浊度等因素而质疑水的安全性。然而研究表明,饮水中... 详细信息

多数饮用者对水垢的认知存在局限性,认为水垢的存在威胁身体健康,尽管水垢的成分,即钙镁离子本身对人体并无害处。通过对水质投诉数据分析,多数饮用者由于水垢的状态、水垢增加了水的浊度等因素而质疑水的安全性。然而研究表明,饮水中保持适量的钙镁离子利于身体健康同时可提高饮用口感。此外,结合硬度对饮用水品质的影响、硬度标准及降硬方法共同分析,通过适当降低硬度指标标准或者加入“煮沸后浑浊度”类似水质指标以及优化分质供水等措施提高饮用感受是合理的。对于水源水本身硬度不高的情况,改进处理工艺或者进行产水末端处理也能够达到显著的降低水垢的目的。

关键词：水垢降低硬度口感钙镁离子建议措施

Random Terpolymer Based on Simple Siloxane-functionalized Thiophene Unit Enabling High-performance Non-fullerene Organic Solar Cells

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Chinese Journal of Polymer Science 2024年第3期42卷 311-321,I0006页

作者： Fuliang cheng Shiting Lai Yihan Zhang Ling Xue xinxin Xia Peipei Zhu Xinhui Lu Xunfan Liao Yiwang Chen National Engineering Research Center for Carbohydrate Synthesis/Key Laboratory of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education College of Chemistry and Chemical EngineeringJiangxi Normal UniversityNanchang 330022China Department of Physics Chinese University of Hong Kong New TerritoriesHong Kong 999077China Institute of Polymers and Energy Chemistry(IPEC)/Jiangxi Provincial Key Laboratory of New Energy Chemistry Nanchang UniversityNanchang 330031China

Incorporation of siloxane-functionalized units into polymers backbone has proven to be an efficient strategy to improve photovoltaic performance. In this work, a low-cost siloxane-containing unit was developed to construct a series of terpolymers, and the effects of siloxane on the polymer performance were systematically studied. Different contents of thiophene containing siloxane-functionalized side chain were introduced into PM6 to obtain a series of polymers(PM6, PM6-SiO-10, PM6-SiO-20 and PM6-SiO-30). The siloxane-functionalized side chains in polymers have only a slight effect on the absorption behavior and frontier molecular orbitals. However, when the siloxane content increased, the terpolymers' aggregation property decreased and the temperature-dependency increased, leading to improved donor-acceptor compatibility. The power conversion efficiency(PCE) based on PM6:Y6, PM6-SiO-20:Y6 and PM6-SiO-30:Y6 devices was 15.64%, 16.03% and 15.82%, respectively. In comparison, the active layer based on PM6-SiO-10:Y6 exhibits the most appropriate phase separation morphology, resulting in effective exciton dissociation, more balanced hole-electron transport and less recombination. Consequently, the highest PCE of 16.69% with an outstanding shortcircuit current density of 26.96 mA·cm^(-2) was obtained, which are one of the highest values for siloxane-functionalized polymer-based *** work demonstrates that finely controlling the content of siloxane-functionalized thiophene is beneficial for obtaining high-performance terpolymer donors and provides a novel and low-cost method to improve photovoltaic performance.

关键词： Organic solar cells Terpolymers Siloxane-functionalized unit Low-cost Morphology

A Neural Regression Model for Predicting Thermal Conductivity of CNT Nanofluids with Multiple Base Fluids

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Journal of Thermal Science 2021年第6期30卷 1908-1916页

作者： ZOU Hanying CHEN cheng ZHA Muxi ZHOU Kangneng XIAO Ruoxiu FENG Yanhui QIU Lin ZHANG xinxin WANG Zhiliang School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing 100083China School of Computer and Communication Engineering University of Science and Technology BeijingBeijing 100083China

High thermal conductivity of carbon nanotube nanofluids(k_(nf))has received great ***,the current researches are limited by experimental conditions and lack a comprehensive understanding of k_(nf) variation *** view of proposition of data-driven methods in recent years,using experimental data to drive prediction is an effective way to obtain k_(nf),which could clarify variation law of k_(nf) and thus greatly save experimental and time *** work proposed a neural regression model for predicting k_(nf).It took into account four influencing factors,including carbon nanotube diameter,volume fraction,temperature and base fluid thermal conductivity(k_(f)).Where,four conventional fluids with k_(f),including R113,water,ethylene glycol and ethylene glycol-water mixed liquid were considered as base fluid *** training this model,it can predict k_(nf) with different ***,change law of four influencing factors considered on the k_(nf) enhancement has discussed and the correlation between different influencing factors and k_(nf) enhancement is ***,compared with nine common machine learning methods,the proposed neural regression model shown the highest accuracy among these.

关键词： thermal conductivity CNT nanofluids Neural Regression Network multiple base fluids

Electrolyte additive enhances the electrochemical performance of Cu for rechargeable Cu//Zn batteries

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Journal of Energy Chemistry 2023年第2期77卷 172-179,I0005页

作者： xinxin Song chenggang Wang Dongdong Wang Huili Peng cheng Wang Chunsheng Wang Weiliu Fan Jian Yang Yitai Qian Key Laboratory of Colloid and Interface Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringShandong UniversityJinan 250100ShandongChina Hefei National Laboratory for Physical Science at Microscale Department of ChemistryUniversity of Science and Technology of ChinaHefei 230026AnhuiChina

Cu-based cathodes in aqueous batteries become very attractive in view of high theoretical capacity,moderate operation voltage and rich reserves of raw ***,their applications are obstructed by serious side *** side reaction mainly arises from the spontaneous formation of Cu_(2)O,which occupies the electrode surface and lowers the reaction ***,Na_(2)EDTA is introduced to address these *** experimental results and theoretical calculations indicate that the Na_(2)EDTA reshapes the solvation structure of Cu^(2+)and modifies the electrode/electrolyte ***,the redox potential of Cu^(2+)/Cu_(2)O is reduced and the surface of Cu is protected from H2O,thereby inhibiting the formation of Cu_(2)***,the change in the solvation structure reduces the electrostatic repulsion between Cu^(2+)and the cathode,leading to high local concentration and benefiting uniform *** results shed light on the applications of rechargeable Cu-based batteries.

关键词： Cu Zn Reaction mechanisms Electrolyte additive Rechargeable batteries

Influence of the NAO on Wintertime Surface Air Temperature over East Asia:Multidecadal Variability and Decadal Prediction

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Advances in Atmospheric Sciences 2022年第4期39卷 625-642页

作者： Jianping LI Tiejun XIE xinxin TANG Hao WANG cheng SUN Juan FENG Fei ZHENG Ruiqiang DING Frontiers Science Center for Deep Ocean Multispheres and Earth System-Key Laboratory of Physical Oceanography-Institute for Advanced Ocean Studies-Academy of the Future Ocean Ocean University of ChinaQingdao 266100China Laboratory for Ocean Dynamics and Climate Pilot Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China College of Global Change and Earth System Sciences Beijing Normal UniversityBeijing 100875China State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal UniversityBeijing 100875China

In this paper,we investigate the influence of the winter NAO on the multidecadal variability of winter East Asian surface air temperature(EASAT)and EASAT decadal *** observational analysis shows that the winter EASAT and East Asian minimum SAT(EAmSAT)display strong in-phase fluctuations and a significant 60-80-year multidecadal variability,apart from a long-term warming *** winter EASAT experienced a decreasing trend in the last two decades,which is consistent with the occurrence of extremely cold events in East Asia winters in recent *** winter NAO leads the detrended winter EASAT by 12-18 years with the greatest significant positive correlation at the lead time of 15 *** analysis shows that ENSO may affect winter EASAT interannual variability,but does not affect the robust lead relationship between the winter NAO and *** present the coupled oceanic-atmospheric bridge(COAB)mechanism of the NAO influences on winter EASAT multidecadal variability through its accumulated delayed effect of~15 years on the Atlantic Multidecadal Oscillation(AMO)and Africa-Asia multidecadal teleconnection(AAMT)*** NAO-based linear model for predicting winter decadal EASAT is constructed on the principle of the COAB mechanism,with good hindcast *** winter EASAT for 2020-34 is predicted to keep on fluctuating downward until~2025,implying a high probability of occurrence of extremely cold events in coming winters in East Asia,followed by a sudden turn towards sharp *** predicted 2020/21 winter EASAT is almost the same as the 2019/20 winter.

关键词： winter East Asian surface air temperature North Atlantic Oscillation Atlantic Multidecadal Oscillation Africa-Asia multidecadal teleconnection pattern coupled oceanic-atmospheric bridge multidecadal variability

抑制性重复经颅磁刺激对脑卒中后非流畅性失语的临床疗效观察

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浙江医学 2023年第11期45卷 1140-1145,1151页

作者：朱慧敏程欣欣刘莉田丽饶江刘尧飞张传文南京医科大学附属脑科医院康复医学科 210029 南京市秦淮区止马营社区卫生服务中心

目的探讨抑制性重复经颅磁刺激(rTMS)对脑卒中后非流畅性失语的临床疗效。方法选择2018年1月至2021年12月在南京医科大学附属脑科医院康复医学科行康复治疗的脑卒中后非流畅性失语患者60例,按随机数字表法分为观察组和对照组各30例,对... 详细信息

目的探讨抑制性重复经颅磁刺激(rTMS)对脑卒中后非流畅性失语的临床疗效。方法选择2018年1月至2021年12月在南京医科大学附属脑科医院康复医学科行康复治疗的脑卒中后非流畅性失语患者60例,按随机数字表法分为观察组和对照组各30例,对照组接受常规药物治疗及训练,观察组在对照组治疗方案基础上加用rTMS治疗(右侧大脑半球Broca同源区1 Hz的rTMS刺激,1次/d,6次/周),于治疗前和治疗3周后评定两组患者西方失语成套测验(WAB)中失语商评分、自发语、听理解、命名、复述,并按照不同病程(3个月)分组进一步比较治疗效果。结果治疗后观察组自发语、复述、命名、失语商评分均高于对照组(均P<0.05);两组患者WAB各项目评分均高于治疗前,差异均有统计学意义(均P<0.05)。治疗后病程<1个月和1~3个月观察亚组患者的WAB各项目评分高于对照组,差异均有统计学意义(均P<0.05)。结论抑制性rTMS抑制右侧大脑半球Broca同源区对改善脑卒中非流畅性失语患者的语言功能有一定作用,且在不同时间起到不同作用。

关键词：抑制性重复经颅磁刺激非流畅性失语脑卒中西方失语成套测验