一种新型高温煤气脱氯剂的研究

以价廉易得的天然矿物及碱为化学活性组分，制得一种新型高温煤气脱氯剂GH1，该脱氯剂在650℃高温，空速2500h^-1和进口HCl气体体积浓度1500mg/m^3-2000mg/m^3条件下的穿透氯容量达到37.2%，同时机械强度合格，实验还考虑了主要成分配比，空速和温度对脱氯性能的影响，并讨论了有关机理。     

高温煤气脱氯剂的制备与结构分析

采用混合法制备了CaCO3/SrCO3双组分高温脱氯剂;探讨了焙烧温度、使用气氛对脱氯剂性能的影响,结果表明在焙烧温度为550℃、使用气氛为煤气时氯容较高;用X-射线衍射(XRD)、X-射线光电子能谱(XPS)、综合热分析仪(TG-DSC)和扫描电子显微镜(SEM)对反应前后的脱氯剂进行了分析表征,结果表明该高温脱氯剂脱除HCl主要是化学吸附,反应后生成了CaCl2和SrCl2。     

氯代烃结构特性对其还原脱氯反应速率的影响

以铁为主要反应介质，以Cu，Ag，Pd为催化剂研究了包括氯代甲烷系列、氯代乙烷系列、氯代乙烯系列、氯代苯系列等多种氯代有机物在这些反应体系中的还原脱氯反应，重点考察了氯代烃的结构特性对其还原脱氯反应速率的影响．结果表明，氯代有机物中氯取代基数目、位置、碳链甲基（-CH3）、不饱和碳键等，都能对氯代物脱氯速率产生重要影响．氯代烃在零价金属体系中的还原脱氯反应符合准一级动力学方程．通过In（c／co）对时间t的线性回归关系，可以计算出各种氯代烃的还原脱氯速率常数．研究了氯代烃结构性质和反应速率常数的关系，得出了氯代烃还原脱氯的规律性．     

零价金属脱氯降解有机氯化污染物研究进展

综述了国内外在零价金属还原脱氯降解有机氯化物领域的研究情况,讨论了零价铁还原脱氯作用机理,展望了零价金属还原脱氯降解有机氯化物研究领域的发展前景。     

低温等离子体对水体中4-氯酚的脱氯

利用平板双介质阻挡放电研究了富氧条件下水相中的4 氯酚的脱氯机理.结果表明,4 氯酚在等离子体的作用下能有效脱氯,而其CODCr下降相对缓慢;4 氯酚的脱氯过程在不同初始浓度和溶液初始pH值下均较好地符合一级反应;4 氯酚的脱氯速率常数与其初始浓度C0和初始pH值的关系分别近似为:k(C0)=0.326+0.678EXP( C0/48)和k(pH)=0.231+0.0452EXP(pH/3.53);pH值降低不利于4 氯酚的脱氯;等离子体降解4 氯酚主要是电子轰击水产生的水相活性粒子的作用,其中起主要作用的是OH·自由基和水合电子eaq ;气相中的活性物种对脱氯率的影响不大,但对CODCr的下降影响较大.     

高氯氧化锌烟尘浓硫酸脱氯的影响因素

研究了浓硫酸用量、固化反应时间、物料粒度对浓硫酸法脱氯的影响。结果表明,随着浓硫酸用量增加脱氯率增大,当烟尘酸量达到０．５２ｍｌ／ｇ时,再继续增加酸量,脱氯率反而下降;固化反应时间与脱氯率呈线性关系,随着固化反应时间的延长,脱氯率增大;氯化锌烟尘粒度在６０￣１７５μｍ范围内,对脱氯率影响不大。     

PVP—TiO2双负载Pd—Hg催化邻氯甲苯水相脱氯活性研究

研究了在相转移条件下,甲酸钠为氢源PVP－Pd-Hg/TiO2为催化剂催化邻氯甲苯水相脱卤性能。考察了Pd/Hg摩尔比、催化剂用量对反应的影响。当Pd/Hg(摩尔比）为10∶1,催化剂用量为0．310g时邻氯甲苯脱氯收率为53．6％。     

Raney Ni催化4-氯酚加氢脱氯研究

研究了在Raney Ni催化剂催化下4-氯酚(4-CP)的液相加氢脱氯,重点考察了溶剂、碱、温度和催化剂用量对Raney Ni催化活性的影响以及催化剂的重复利用.研究结果表明:水的加入解决了NaCl在催化剂表面聚集以致催化剂失活的问题;强碱以及三乙胺的加入则使催化剂活性保持在较高水平;在30℃下催化剂催化4-CP加氢脱氯的活性比较好;随着催化剂用量的增加,4-CP的加氢脱氯反应速率明显加快;催化剂使用3次后活性下降.     

氯代芳烃脱氯速率常数的QSPR研究

测定钯／铁催化还原水中８种氯代烃的反应速率常数,以ＰＭ３算法计算了表征氯代芳烃分子结构的量子化学参数,并用一元回归分析对氯代芳烃的分子结构与与其催化还原脱氯速率进行了定理结构－性能相关研究。     

Pd/C催化选择性加氢脱氯制备氯乙酸甲酯

以负载型金属钯为催化剂对氯乙酸母液混酯进行选择性加氢脱氯，从而制备高纯度的氯乙酸甲酯，并就该反应的工艺条件进行了初步探索。结果表明，当金属钯的载量（质量分数）达到1.0%，催化反应温度为145℃，氢气气速达到100-120mL/min时，反应效果达到最佳，不仅二氯乙酸甲酯得到了完全转化，而且选择性达到95%。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with