碳纳米管改性填料对氟碳涂料性能的影响
作者:
田野;周艺;钟娴;朱志平
作者机构:
长沙理工大学,化学与生物工程学院,湖南省长沙理工大学云塘校区,410114
会议名称:
中国电机工程学会电厂化学2013学术年会
会议时间:
2013-11-21
会议地点:
长沙
会议论文集名称:
中国电机工程学会电厂化学2013学术年会论文集
关键词:
碳纳米管;改性处理;氟碳树脂;憎水性能
摘要:
本文采用混合酸和表面活性剂对碳纳米管进行表面改性处理,利用改性碳纳米管与不同的填料构造复合填料,并与FEVE氟碳树脂合成了碳纳米管改性复合氟碳材料,并将其涂覆在陶瓷基底上形成氟碳涂层,并且探究了改性碳纳米管的用量对氟碳涂料憎水性能的影响.采用红外光谱(FTIR)对表面改性后的碳纳米管进行了表征分析,用扫描电镜(SEM)、接触角测量仪等观察和测试了纳米复合氟碳涂层表面的微观结构及疏水性.研究结果表明:混合酸和表面活性剂处理碳纳米管,碳纳米管的缠绕、团聚现象得到明显的改善,改善了其在氟碳树脂基体中的分散效果,改性碳纳米管的量为0.75g时,涂料的憎水性能较好.
语种:
中文
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注锌对压水堆-回路材料影响特性研究
作者:
银朝晖;于卫卫;焦晓翠;汤雪颖;朱志平
作者机构:
长沙理工大学化学与生物工程学院 长沙410004
会议名称:
中国电机工程学会电厂化学2013学术年会
会议时间:
2013-11-21
会议地点:
长沙
会议论文集名称:
中国电机工程学会电厂化学2013学术年会论文集
关键词:
压水堆核电站;腐蚀产物;一回路材料;注锌量
摘要:
压水堆核电站(PWR)一回路材料长期与高温冷却剂接触,其耐腐蚀性能关系到核电站的安全运行,腐蚀产物随冷却剂经过堆芯时被活化产生放射性元素60Co和58Co,并沉积在结构材料的氧化膜中.减少辐射的主要方法是降低冷却剂的氧化能力,采用氢水化学(HWC)不能有效的抑制PWR一回路部件的腐蚀和污染物在回路中的沉积,Zn2+注入可以有效减少职业辐射照射剂量,并降低金属的腐蚀速度,抑制表面氧化膜的增长,减缓核电厂蒸汽发生器一次侧应力腐蚀(PWSCC).文章简要介绍注锌的基本原理,分析注锌后对材料的氧化膜和耐腐蚀性能的影响及不同注锌量对材料的影响.
语种:
中文
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直流杂散电流对不同含水率土壤中接地网材料腐蚀特性的影响
作者:
谭铮辉;朱志平;裴锋;付晶;田旭;...
期刊:
腐蚀科学与防护技术 ,2013年25(3):207-212 ISSN:1002-6495
通讯作者:
Zhu, Z.
作者机构:
长沙理工大学化学与生物工程学院 长沙410114;江西省电力科学研究院 南昌330096
通讯机构:
School of Chemical and Biological Engineering, Changsha University of Science and Technology, China
关键词:
直流杂散电流;接地网材料;含水率;腐蚀
摘要:
通过电化学阻抗谱、极化曲线与失重测量,研究了直流杂散电流对接地网材料Q235扁钢、Q235镀锌扁钢和Cu在含水率分别为15%和20 mass%的土壤中腐蚀特性的影响。结果表明:在含水率为15%的土壤中无论是否加载杂散电流,接地网材料EIS谱的扩散阻抗除Q235镀锌扁钢外均表现为与45°角相近的斜线段,在含水率为20%的土壤中,所有的EIS谱都表现为具有两个时间常数的双容抗弧。随含水率的增加,接地网材料的容抗弧明显缩小,腐蚀电流密度和失重速率明显增大;在含水率相同的土壤中,有直流杂散电流干扰时,接地网材料的容抗弧比无干扰时要小,而腐蚀电流密度和失重速率明显增大;3种接地网材料的耐蚀性排序是:Cu最好,Q235镀锌扁钢次之,Q235扁钢最差。
语种:
中文
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超临界锅炉给水加氧处理的应用与评价
作者:
王磊静;黄静;陆海伟;朱志平
作者机构:
长沙理工大学化学与生物工程学院 湖南省 长沙市 410114
会议名称:
中国电机工程学会电厂化学2013学术年会
会议时间:
2013-11-21
会议地点:
长沙
会议论文集名称:
中国电机工程学会电厂化学2013学术年会论文集
关键词:
火力发电厂;超临界锅炉;给水加氧处理;效果评估
摘要:
加氧处理技术应用于超临界机组可以有效抑制炉前系统及高压加热器的流动加速腐蚀(FAC),改善汽水品质、提高机组效率.结合当前超临界不同的给水运行方式,本文阐述了加氧处理的特点和基本原理,并重点介绍了加氧处理技术的有关应用条件以及加氧处理效果评价方法,为加氧处理工艺在大型超临界火力发电机组的推广应用提供指导建议.超临界锅炉给水加氧处理使得金属表面产生更加致密、溶出率更低的保护性氧化膜,有效抑制了抑制炉前系统及高压加热器管的FAC,但应严格控制加氧运行的条件,这包括给水水质、机组材质、pH值、溶解氧等。通过加氧处理技术在国内外超临界机组成功应用的经验,超临界给水加氧处理技术可以通过降低系统铁含量、减少锅炉结垢速率、降低锅炉压差、延长精处理运行周期以及降低运行费用等方面进行效果评价。由于在提高机组的安全性和经济性方面具有明显的优势,超临界锅炉给水加氧处理值得进行推广应用。
语种:
中文
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水汽中氯离子及硫酸根浓度与精处理混床之间的关系
作者:
陆海伟;刘学文;杨俊杰;朱志平
作者机构:
长沙理工大学化学与生物工程学院 湖南 长沙 410114
会议名称:
中国电机工程学会电厂化学2013学术年会
会议时间:
2013-11-21
会议地点:
长沙
会议论文集名称:
中国电机工程学会电厂化学2013学术年会论文集
关键词:
火力发电厂;凝结水;精处理混床;氯离子;硫酸根;浓度控制
摘要:
Cl-和SO42-是造成热力设备故障的主要原因之一,一旦Cl-和SO42-进入热力系统将严重成胁机组安全经济运行.部分火力发电机组和核电机组在凝结水精处理混床投运后曾发生Cl-和SO42-升高甚至超标的问题.本文结合电厂凝结水精处理混床运行中出现的问题和部分相关科研成果就水汽中Cl-和SO42-与凝结水精处理混床运行进行了讨论,为Cl-和SO42-的控制、监督及凝结水精处理混床的运行提供参考.
语种:
中文
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Influence of moisture on corrosion behaviour of steel ground rods in mildly desertified soil
作者:
Fu, Jing;Pei, Feng;Zhu, Zhiping* ;Tan, Zhenghui;Tian, Xu;...
期刊:
Anti-corrosion Methods and Materials ,2013年60(3):148-152 ISSN:0003-5599
通讯作者:
Zhu, Zhiping
作者机构:
[Tan, Zhenghui; Zhu, Zhiping; Wang, Leijing; Fu, Jing] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Changsha, Hunan, Peoples R China.;[Mao, Rongjun; Pei, Feng; Tian, Xu] Jiangxi Elect Power Res Inst, Nanchang, Peoples R China.
通讯机构:
[Zhu, Zhiping] C;Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Changsha, Hunan, Peoples R China.
关键词:
Corrosion;Moisture;Soil corrosion;Steel;Steel ground rods
摘要:
Purpose: The purpose of this paper is to study the influence of moisture on corrosion behaviour of steel ground rods in mildly desertified soil and the mechanism behind it. Design/methodology/approach: The specimens were used for weight loss corrosion experiments and polarization scans were taken at different moisture levels. Specimen surfaces were characterized using a scanning electron microscope, energy dispersive spectrometer, and using X-ray diffraction. Findings: The results indicated that the moisture content of the soil influenced steel corrosion considerably. The maximum corrosion of 20G and Q235 galvanised steels occurred at 10 per cent and 12.5 per cent soil moisture, respectively. The corrosion products of 20G steel were mostly Fe2O3 and Fe3O4, whereas that of Q235 galvanised steel was Zn5(OH)8Cl2 · H2O. Originality/value: The paper provides information regarding the relationship between moisture and corrosion of steel ground rods, which is useful for understanding the mechanism of soil corrosion. The research results can provide theoretical guidelines for preventing the corrosion of steel ground rods buried in mildly desertified soil. © Emerald Group Publishing Limited.
语种:
英文
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Preparation and characterization of Gd3+/B3+ codoped TiO2 nanotubes
作者:
Zhiping Zhu;Yi Zhou;Hong Li;Kelong Huang
期刊:
Advanced Science Letters ,2012年5(2):945-948 ISSN:1936-6612
通讯作者:
Huang, K.
作者机构:
[Huang K.] College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China;[Zhou Y.; Li H.] College of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha, 410114, China;[Zhu Z.] College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China, College of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha, 410114, China
通讯机构:
[Huang, K.] C;College of Chemistry and Chemical Engineering, Central South University, China
关键词:
Co-dope;Hydrothermal method;Nanotubes;TiO2
摘要:
TiO2 nanotubes co-doped with Gd3+/B3+ were successfully synthesized from TiO2 nanoparticle powder using a two-step route consisting of a sol-gel method and a hydrothermal treatment. The influence of doping effects on photochemical capability of TiO2 was also investigated. The as-fabricated nanotubes were characterized in detail using transmission electron microscopy (TEM), X-ray diffraction (XRD), and UV-vis spectroscopy (UV-vis). The co-doped nanotubes had an average outer diameter of approximately 6-7 nm and an inner diameter of approximately 4-5 nm and were several hundred nanometers in length. TiO2 nanotubes co-doped with Gd3+/B3+ showed enhancement in terms of their aspect ratio and debond fracture toughness when compared to pure TiO2 nanotubes. Co-doped samples also displayed remarkably stronger absorption in the visible range and a slight red shift in their absorption edge. © 2012 American Scientific Publishers All rights reserved.
语种:
英文
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Research into the characteristics of furnace tube oxide film in CPT, CT, AVT(R) and AVT(O) water chemistry conditions
作者:
Zhu, Zhiping;Zhang, Hui* ;Jing, Linlin;Xiong, Shuhua;Tan, Zhenghui
期刊:
Anti-corrosion Methods and Materials ,2012年59(2):81-87 ISSN:0003-5599
通讯作者:
Zhang, Hui
作者机构:
[Zhang, Hui; Tan, Zhenghui; Zhu, Zhiping; Jing, Linlin; Xiong, Shuhua] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Changsha, Hunan, Peoples R China.
通讯机构:
[Zhang, Hui] C;Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Changsha, Hunan, Peoples R China.
关键词:
Films (states of matter);Furnaces;Water treatment;Chemical treatment;Corrosion science
摘要:
Purpose: The purpose of this paper is to research the morphologies of the oxide films formed on the internal surfaces of water wall tubes in a 600 MW furnace at 300° while using CPT, CT, AVT(R) and AVT(O) water chemistry. In these water chemistry conditions, a layer of oxide film spontaneously forms in the furnace wall which could prevent corrosions in boiler water directly contact with the inner tube and reduce the probability of tube perforation. Design/methodology/approach: The different morphologies, specific functions and distribution in the oxide film were identified by electrochemical workstation, XRD, SEM and EDAX. Findings: It is concluded that metal surface was rugged and had deep corrosion in CPT. Ions penetrated into the oxides of large particles with gaps and intergranular corrosion occurred in CT conditions. In AVT(R), the oxide film uniformly covered on the metal surface played a protective role, but could be easily washed away by solution. The oxide film formed in AVT(O) was similar to AVT(R), but the difference is that large solid particles of Fe 2O 3 cover the outermost oxide film, which prevents the oxide film from being taken away by the flowing solution. In consequence, the degree of corrosion sustained by the tube walls is lowest in the case of AVT(O). Originality/value: The results can provide reference for reducing the high temperature corrosion of metal in the actual operation. © Emerald Group Publishing Limited.
语种:
英文
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新型拓扑指数和神经网络研究咪唑啉衍生物的缓蚀性能
作者:
戴益民;刘又年;朱志平;李浔;曹忠;...
期刊:
石油学报(石油加工) ,2012年28(1):115-121 ISSN:1001-8719
通讯作者:
Dai, Y.(yimindai@163.com)
作者机构:
[戴益民; 刘又年] School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;[戴益民; 李浔; 曹忠; 朱志平; 杨道武] Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, Changsha University of Science and Technology, Changsha 410004, China
通讯机构:
School of Chemistry and Chemical Engineering, Central South University, China
关键词:
电性连接性指数;咪唑啉衍生物;缓蚀剂;缓蚀效率(CIE);人工神经网络
摘要:
基于分子图论提出了一种用于表征咪唑啉衍生物分子局部化学微环境及原子杂化状态的新颖结构描述子,即电性连接性指数0Kv、1 Kv和咪唑啉环非氢原子平衡总电荷分数MCI,用于研究15种咪唑啉类缓蚀剂抗CO_2、H_2S腐蚀性能的定量构效关系。结果表明,模型计算值、留一法交互检验预测值的复相关系数分别为0.9764、0.9546,所建模型具有良好的稳定性和外部预测能力;同多元回归方法比较,运用人工神经网络法的复相关系数为0.9848,结果更精确;增加咪唑啉环上取代基长度、减小分子的支化度和降低咪唑环非氢原子平衡总电荷分数能显著提高咪唑啉缓蚀剂的缓蚀效率。
语种:
中文
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Influence of Clions on the pitting corrosion of boiler waterwall tube and its principle
作者:
Xiong, Shuhua;Zhu, Zhiping* ;Jing, Lingling
期刊:
Anti-corrosion Methods and Materials ,2012年59(1):3-9 ISSN:0003-5599
通讯作者:
Zhu, Zhiping
作者机构:
[Jing, Lingling; Zhu, Zhiping; Xiong, Shuhua] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Changsha, Hunan, Peoples R China.
通讯机构:
[Zhu, Zhiping] C;Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Changsha, Hunan, Peoples R China.
关键词:
Pitting corrosion;Chloride;Walls;Water;Alloys;Steels;Ions
摘要:
The purpose of this paper is to investigate the influence of Clions on the pitting corrosion of waterwall tube of a boiler and the principle behind it. The specimens were immersed for seven hours at 300°C in deaerated water subjected to simulationmodified equilibrium phosphate treatment, containing Clions at various concentrations. The effects of Clions on pitting corrosion were assessed by the rate mass loss, transmission reflection metallurgical microscopy, SEM, EDS, and XRD. The results indicated that Clions cause the breakdown of passive films. The corrosion mechanism of Clis proposed to involve an intermediate dissolution stage. The Clions act as a catalyst of corrosion, by inducing the hydrolysis of Fe2+. The critical susceptive Clconcentrations are 0.2 and 0.6 mg·L1 for the passivated specimens and for the unpassivated specimens, respectively. The paper provides information regarding the relationship between Clconcentrations and pitting corrosion, useful for understanding the mechanism of Clinduced pitting corrosion, and the research results can provide theoretical guidelines for preventing waterwall of power plants from corroding. © 2012, Emerald Group Publishing Limited
语种:
英文
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锅炉水冷壁管材料20G和15CrMo在含Cl~-溶液中的点蚀特性
作者:
朱志平;熊书华;赵永福;郭小翠;周瑜
期刊:
中国电机工程学报 ,2012年32(2):67-72 ISSN:0258-8013
通讯作者:
Zhu, Z.(zzp8389@163.com)
作者机构:
[赵永福; 郭小翠; 朱志平; 熊书华; 周瑜] School of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha 410004, Hunan Province, China
通讯机构:
School of Chemistry and Biological Engineering, Changsha University of Science and Technology, China
关键词:
锅炉;水冷壁管;点蚀
摘要:
为研究水冷壁管材料20G和15CrMo在含Cl^-溶液中的点蚀特性,通过常温电化学实验和高温挂片实验,对其常温、高温腐蚀特性进行分析,用透反射金相显微镜、扫描电子显微镜(scanning electron microscopy,SEM)、X能谱仪(energy dispersive spectrometer,EDS)、X射线衍射fx-raydiffraction,XRO)对试片表面形态和组分进行表征与分析。结果表明,常温条件下,Cl^-对这2种材料都有侵蚀性,其中15CrMo耐Cl^-侵蚀性能比20G优秀。高温条件下,Cl^-对20G和15CrMo的侵蚀性严重,促进材料的溶解,加速材料的点蚀。常温条件下Cl^-与OH^-在金属表面存在竞争吸附作用,形成复合中间体FeOHCl,高温条件下Cl^-的作用相当于催化剂,促进Fe2+水解,生成疏松无保护性的Fe3O4。在电厂实际运行中,应控制给水中Cl^-质量浓度低于0.2mg/L。
语种:
中文
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电厂用阳离子交换树脂高温分解特性研究
作者:
荆玲玲;朱志平;张辉;熊书华
期刊:
热能动力工程 ,2012年27(1):96-100 ISSN:1001-2060
通讯作者:
Jing, L.-L.
作者机构:
长沙理工大学化学与生物工程学院,湖南长沙,410076;[朱志平; 熊书华; 张辉; 荆玲玲] 长沙理工大学
通讯机构:
College of Chemical and Biological Engineering, Changsha University of Science and Technology, China
关键词:
阳离子交换树脂;高温分解;离子色谱法;红外光谱
摘要:
漏入热力系统破碎阳树脂的高温分解是电站水汽系统SO_4~(2-)含量超标的原因之一。针对这一问题,采用高压釜实验对几种凝结水精处理常用阳树脂的SO_4~(2-)高温分解特性进行了研究。结果表明:阳树脂高温分解后其交换基团(—SO3H)会从树脂骨架上脱落并产生SO_4~(2-),其分解产生SO_4~(2-)的量随分解温度的升高而增大,当温度超过200℃后会出现骤增现象,并产生大量酸性物质;旧树脂分解产生SO_4~(2-)的量略小于新树脂,但会产生更多的酸性物质;在280℃条件下,阳树脂分解产生SO_4~(2-)的量随时间的增加而增加,实测SO_4~(2-)结果与红外光谱检测结果都表明某些树脂分解24 h后几乎达完全分解。
语种:
中文
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Estimation of surface tension of organic compounds using quantitative structure-property relationship
作者:
Dai Yi-min;Liu You-nian* ;Li Xun;Cao Zhong;Zhu Zhi-ping;...
期刊:
中南大学学报(英文版) ,2012年19(1):93-100 ISSN:2095-2899
通讯作者:
Liu You-nian
作者机构:
[Liu You-nian; Dai Yi-min] Cent S Univ, Sch Chem & Chem Engn, Changsha 410083, Peoples R China.;[Cao Zhong; Zhu Zhi-ping; Dai Yi-min; Li Xun; Yang Dao-wu] Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410004, Hunan, Peoples R China.;[Cao Zhong; Zhu Zhi-ping; Dai Yi-min; Li Xun; Yang Dao-wu] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Changsha 410004, Hunan, Peoples R China.
通讯机构:
[Liu You-nian] C;Cent S Univ, Sch Chem & Chem Engn, Changsha 410083, Peoples R China.
关键词:
surface tension;quantitative structure-property relationship (QSPR);topological indice;organic compound
摘要:
A novel quantitative structure-property relationship (QSPR) model for estimating the solution surface tension of 92 organic compounds at 20 °C was developed based on newly introduced atom-type topological indices. The data set contained non-polar and polar liquids, and saturated and unsaturated compounds. The regression analysis shows that excellent result is obtained with multiple linear regression. The predictive power of the proposed model was discussed using the leave-one-out (LOO) cross-validated (CV) method. The correlation coefficient (R) and the leave-one-out cross-validation correlation coefficient (R <inf>CV</inf>) of multiple linear regression model are 0.991 4 and 0.991 3, respectively. The new model gives the average absolute relative deviation of 1.81% for 92 substances. The result demonstrates that novel topological indices based on the equilibrium electro-negativity of atom and the relative bond length are useful model parameters for QSPR analysis of compounds. ©2012 Central South University Press and Springer-Verlag Berlin Heidelberg.
语种:
英文
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锅炉水冷壁管在含SO_4~(2-)溶液中的点蚀特性研究
作者:
熊书华;朱志平;荆玲玲;张辉
期刊:
热能动力工程 ,2012年27(1):91-95 ISSN:1001-2060
通讯作者:
Xiong, S.-H.
作者机构:
长沙理工大学化学与生物工程学院,湖南长沙,410076;[朱志平; 张辉; 荆玲玲; 熊书华] 长沙理工大学
通讯机构:
College of Chemical and Biological Engineering, Changsha University of Science and Technology, China
关键词:
水冷壁管;点蚀
摘要:
为研究水冷壁管材料15CrMo在含SO_4~(2-)溶液中的点蚀特性,通过常温电化学实验和高温挂片实验,对常温性能和高温腐蚀特性进行分析,用透反射金像显微镜、SEM、EDS、XRD对试片表面形态和组分进行表征与分析。结果表明:常温条件下,SO_4~(2-)主要以氧化作用为主,抑制不锈钢的腐蚀,材料的耐蚀性增加;高温条件下,SO_4~(2-)为侵蚀性离子,将加速材料的点蚀,形成带有锯齿状边缘的点蚀坑,其点蚀临界浓度为1mg/L;常温下SO_4~(2-)抑制Cl-点蚀的机理是竞争吸附,高温条件下SO_4~(2-)促进点蚀的机理为局部酸化理论。
语种:
中文
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超临界机组中氧化皮与含氧量关系的理论分析
作者:
周瑜;朱志平;赵永福;郭小翠
作者机构:
长沙理工大学化学与生物工程学院(湖南 长沙 410114)
会议名称:
中国电机工程学会电厂化学2011学术年会
会议时间:
2011-10-01
会议地点:
上海
会议论文集名称:
中国电机工程学会电厂化学2011学术年会论文集
关键词:
超临界机组;氧化皮;水蒸汽;含氧量;反应机理
摘要:
本文从热力学角度分析超临界中水与铁的反应机理,探讨了不同水工况下氧化皮的生成机理、结构。研究表明超临界机组氧化皮的生成与给水是否含氧没有关系,铁在超临界水蒸汽中生成氧化物所需要的氧主要来源于水离解产生的氧。而氧化皮的脱落与给水氧含量的大小没有关系,金属氧化皮厚度和温度变化幅度与氧化皮的开裂和剥落有密切的联系,但给水氧含量会影响氧化皮的结构。
语种:
中文
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Simulation of C-13 NMR chemical shifts of carbinol carbon atoms using quantitative structure-spectrum relationships
作者:
Dai Yi-min;Huang Ke-long* ;Li Xun;Cao Zhong;Zhu Zhi-ping;...
期刊:
中南大学学报(英文版) ,2011年18(2):323-330 ISSN:2095-2899
通讯作者:
Huang Ke-long
作者机构:
[Huang Ke-long; Dai Yi-min] Cent S Univ, Sch Chem & Chem Engn, Changsha 410083, Peoples R China.;[Cao Zhong; Zhu Zhi-ping; Dai Yi-min; Li Xun; Yang Dao-wu] Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410004, Hunan, Peoples R China.
通讯机构:
[Huang Ke-long] C;Cent S Univ, Sch Chem & Chem Engn, Changsha 410083, Peoples R China.
关键词:
carbinol carbon atom;C-13 nuclear magnetic resonance;chemical shift;topological indices;quantitative structure-spectroscopy relationship
摘要:
A quantitative structure-spectrum relationship (QSSR) model was developed to simulate 13C nuclear magnetic resonance (NMR) spectra of carbinol carbon atoms for 55 alcohols. The proposed model, using multiple linear regression, contained four descriptors solely extracted from the molecular structure of compounds. The statistical results of the final model show that R 2=0.982 4 and S=0.869 8 (where R is the correlation coefficient and S is the standard deviation). To test its predictive ability, the model was further used to predict the 13C NMR spectra of the carbinol carbon atoms of other nine compounds which were not included in the developed model. The average relative errors are 0.94% and 1.70%, respectively, for the training set and the predictive set. The model is statistically significant and shows good stability for data variation as tested by the leave-one-out (LOO) cross-validation. The comparison with other approaches also reveals good performance of this method. Key wordscarbinol carbon atom– 13C nuclear magnetic resonance–chemical shift–topological indices–quantitative structure-spectroscopy relationship
语种:
英文
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碳纳米管吸附腐植酸的动力学,热力学及机理研究
作者:
Zhu Zhi-Ping* ;Huang Ke-Long;Zhou Yi
期刊:
无机材料学报 ,2011年26(2):170-174 ISSN:1000-324X
通讯作者:
Zhu Zhi-Ping
作者机构:
[Huang Ke-Long; Zhu Zhi-Ping] Cent S Univ, Coll Chem & Chem Engn, Changsha 410082, Hunan, Peoples R China.;[Zhou Yi; Zhu Zhi-Ping] Changsha Univ Sci & Technol, Coll Chem & Biol Engn, Changsha 410114, Hunan, Peoples R China.
通讯机构:
[Zhu Zhi-Ping] C;Cent S Univ, Coll Chem & Chem Engn, Changsha 410082, Hunan, Peoples R China.
关键词:
碳纳米管;腐植酸;吸附;动力学;热力学
摘要:
针对天然水中腐植酸(HA)类溶解性有机物去除问题,采用多壁碳纳米管为吸附剂,在不同的pH值,吸附剂量,初始HA浓度下进行吸附动力学实验,用准二级速率方程拟合了动力学数据,其线性相关度在0.99以上,拟合得到的平衡吸附量为27mg/g,与实验结果(25.5 mg/g)基本一致.在25~50℃下进行了碳纳米管吸附腐植酸的等温吸附实验,以Langmuir模型拟合的平衡吸附量为29.7mg/g,与实验结果相近.用Clapeyron-Clausius与Gibbs-Helmholtz方程计算的自由能(ΔG),焓(ΔH),熵(ΔS)皆为负值,说明碳纳米管对腐植酸的吸附为放热熵减过程.碳纳米管的表面,管间隙,管内腔及管束之间形成的束聚孔为其有效吸附点位,腐植酸与碳纳米管间的π-π作用也是吸附的主要原因之一
语种:
中文
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超临界汽轮机组的积盐和腐蚀特性研究
作者:
郭小翠;朱志平;赵永福;周瑜
作者机构:
长沙理工大学化学与生物工程学院(长沙 410114)
会议名称:
中国电机工程学会电厂化学2011学术年会
会议时间:
2011-10-01
会议地点:
上海
会议论文集名称:
中国电机工程学会电厂化学2011学术年会论文集
关键词:
超临界机组;腐蚀特性;汽轮机积盐
摘要:
本文分析了超临界机组汽轮机积盐的原因、危害和防止措施。溶解携带是超临界机组的杂质进入汽轮机的主要方式,汽轮机高压缸沉积物主要是金属氧化物,中压缸除有金属氧化物外还有大量的硅酸盐和少量硫酸盐的沉积,低压缸可能会结钙、镁水垢,腐蚀一般发生在低压缸,碱、氯离子、硫酸根和蛾北物是引起汽轮机叶片和转子腐蚀的主要原因。保证给水质量、防止系统的腐蚀、保证系统设备不漏杂质是减少汽轮机积盐的主要措施、根据积盐的实际情况、机组的型号和結构特性和经济效益等采用不同的汽轮机清洗方法。
语种:
中文
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核电站二回路中ETA的离子色谱检测方法研究
作者:
赵水福;朱志平;郭小翠;周瑜
作者机构:
长沙理工大学化学与生物工程学院 (湖南长沙 410114)
会议名称:
中国电机工程学会电厂化学2011学术年会
会议时间:
2011-10-01
会议地点:
上海
会议论文集名称:
中国电机工程学会电厂化学2011学术年会论文集
关键词:
核电站二回路;ETA检测;离子色谱法;水质监测
摘要:
快速准确地测定柱电站二回路中ETA的含量不仅是核电站水质监测的一项重要任务,更是实现水化学工况优化的一条有效途径。本文在模拟核电站二回路水工况的条件下,采用离子色谱法对ETA进行了测定,测定结果表明:离子色谱法测定核电站二回路中的ETA具有操作简单快捷,重复性好,准确度高,检出限低等特点,是一种值得推广的高效在线检测方法。
语种:
中文
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Preparation and photodegradation of humic acid by a Y 3+-doped ZnO/TiO 2 composite
作者:
Zhu, Zhiping* ;Zhou, Y.
期刊:
Applied Mechanics and Materials ,2011年44-47:2312-2315 ISSN:1660-9336
通讯作者:
Zhu, Zhiping
作者机构:
[Zhu, Zhiping; Zhou, Y.] Changsha Univ Sci & Technol, Coll Chem & Environm Engn, Changsha 410076, Hunan, Peoples R China.
通讯机构:
[Zhu, Zhiping] C;Changsha Univ Sci & Technol, Coll Chem & Environm Engn, Changsha 410076, Hunan, Peoples R China.
会议名称:
the 2010 International Conference on Frontiers of Manufacturing and Design Science(第一届制造与设计科学国际会议(ICFMD 2010))
会议时间:
2010-12-11
会议地点:
重庆
会议主办单位:
[Zhu, Zhiping;Zhou, Y.] Changsha Univ Sci & Technol, Coll Chem & Environm Engn, Changsha 410076, Hunan, Peoples R China.
会议论文集名称:
the 2010 International Conference on Frontiers of Manufacturing and Design Science(第一届制造与设计科学国际会议(ICFMD 2010))论文集
关键词:
doping;composite;solid-phase synthesis;photoactivity
摘要:
Aim to remove soluble humic acid (HA) in super-critical boiler make-up water, Y3+-doped ZnO/TiO2 composites were prepared using a solid-phase synthesis method, Their properties were characterized by x-ray diffraction, transmission electron microscopy, and UV-visible diffuse reflection spectroscopy (DRS); their visible light photoactivities were evaluated by the photodegradation of humic acid in an aqueous solution under sunlight irradiation.. The experiment results showed that Y3+-doped samples had a higher absorbance than pure TiO2, and a red shift appeared in the DRS spectrum; The Y3+-doped ZnO/TiO2 multiplex nanocomposite can expand the wavelength range for light absorption and increase the sunlight utilization efficiency. Samples with 3% Y3+ and 27% ZnO have the highest photoactivities.
语种:
英文
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