甲醇脱氢制备甲酸甲酯的催化性能研究

将浸渍法制备的Ｃｕ／ＳｉＯ２、Ｃｕ－ＺｎＯ／ＳｉＯ２、Ｃｕ－ＺｎＯ－ＺｒＯ２／ＳｉＯ２,以及Ｃｕ／γ－Ａｌ２Ｏ３、Ｃｕ－ＺｎＯ／γ－Ａｌ２Ｏ３、Ｃｕ－ＺｎＯ－ＺｒＯ２／γ－Ａ六种催化剂应用于甲醇脱氢制甲酸甲酯反应。实验结果表明,以Ａｌ２Ｏ３为载体的催化选择性较差且易积炭失活;加有ＺｎＯ助催化剂的Ｃｕ－ＺｎＯ／ＳｉＯ２性能优于末加助催化剂的Ｃｕ／ＳｉＯ２;加有权助催化剂的Ｃｕ－Ｚｎ－ＺｒＯ２／Ｓｉ     

甲醇催化脱氢制甲酸甲酯反应中Cu－ZrO_2／SiO_2催化剂的特性

考察了常压和２７０℃时甲醇催化脱氢制取甲酸甲酯反应中Ｃｕ－ＺｒＯ２／Ｓｉ４和Ｃｕ－ＺｒＯ／ＳｉＯ４催化剂的活性和选择性，并对催化剂进行了表征．结果表明，Ｃｕ－ＺｒＯ／ＳｉＯ４催化剂的反应性能优于Ｃｕ－ＺｒＯ／ＳｉＯ２催化剂．Ｘ射线衍射分析表明，零价铜是催化活性中心．差热分析表明，ＺｒＯ２的加入缓和了Ｃｕ（ＮＯ３）２的热分解过程．程序升温还原实验表明，加入ＺｒＯ２后，降低了ＣｕＯ的还原温度．根据上述实验结果，解释了ＺｒＯ２的助催化作用．     

甲醇催化脱氢制甲酸甲酯反应中Cu—ZrO2／SiO2催化剂的特性

考察了常压和２７０℃时甲醇催化脱氢制取甲酸甲酯反应中Ｃｕ－ＺｒＯ２／ＳｉＯ２和Ｃｕ－ＺｎＯ／ＳｉＯ２催化剂的活性和选择性，并对催化剂进行了表征。     

用KVO_3催化剂催化裂解正戊烷制取低级烯烃的实验研究

用ＫＶＯ３作活性组分，用不同载体采用浸渍法制备出一系列ＫＶＯ３／载体催化剂．在连续性微反活性评价装置上，以正戊烷为原料，对空白载体和催化剂分别进行了活性考察．结果表明，催化剂均比相应的空白载体具有高得多的活性，这说明ＫＶＯ３是比较理想的活性组分．活性数据和物相分析表明，载体中含有ＺｒＯ２和ＣａＡｌ４Ｏ７对催化剂的活性比较有利．而含有Ｌａ２Ｏ３的高铝水泥物相对催化裂解的活性有不利影响，董青石（ＭｇＯ·Ａｌ２Ｏ３·ＳｉＯ２）不宜作为该类催化剂的载体．     

促进型甲酸甲酯氢解制甲醇铜基催化剂的研究

研制开发了一种耐ＣＯ低温高效四组分（Ｃｕ－Ｃｒ－Ｍｎ－Ｎｉ）改进铜铬催化剂，其原料合成气中ＣＯ允许含量可高达１３Ｖ％；在常压，４１３Ｋ，原料气Ｈ２／ＭＦ＝４／１（ｖ／ｖ），流速为１８００ｍＬ／ｈｇｃａｔａｌ．的反应条件下，ＭＦ转化率高达９９．８％，甲醇选择性为９９．９％（在相同反应条件下二组分的Ｃｕ－Ｃｒ催化剂上ＭＦ转化率仅为７３．１％，甲醇选择性为９８．０％），当向原料气中添加１３．１Ｖ％ＣＯ时，ＭＦ转化率仍可以稳定达到９５．９％，甲醇选择性为９６．３％．实验结果表明，ＣＯ导致催化剂失活的重要原因之一是ＣＯ导致Ｃｕ＋深度还原为Ｃｕ０，减少催化剂的活性中心     

CeO2对CuO／SiO2的助催化作用

本文考察了Ｃｕ－Ｃｅ／ＳｉＯ２催化剂对ＣＯ和ＣＨ４的氧化反应活性，助剂ＣｅＯ２对催化剂ＣｕＯ／ＳｉＯ２的ＣＯ氧化有明显的促进作用，而对ＣＨ４氧化作用不明显，适量的ＣｅＯ２还能提高催化剂的热稳定性，并初步探讨了ＣｅＯ２的助催化作用。     

阻燃剂聚二溴苯醚的合成

分别利用Ｋ３Ｆｅ（ＣＮ）６，ＣｕＣｌ２·２Ｈ２Ｏ－ＤＭＳＯ，Ｃｕ（ＮＯ３）２·３Ｈ２Ｏ－ＣＨ３ＣＮ，ＣｕＣｌ２·２Ｈ２Ｏ－ＤＭＦ，ＣｕＣｌ２·２Ｈ２Ｏ－ＮａＯＣＨ３，等５种不同催化体系制备了阻燃剂聚二溴苯醚，并详细地研究了其中３种催化体系中的单体浓度、催化剂用量、反应温度以及反应时间对产率的影响，找到了合成的最佳条件，并讨论了几种催化体系的反应机理。５种催化体系所得产物存在着分子量由大到小的分布，     

氧化铈对负载型氧化铜催化剂的助催化作用

应用ＸＰＳ方法研究了ＣｕＯ－ＣｅＯ２／Ａｌ２Ｏ３催化剂的表面特征，探索了ＣｅＯ２对ＣｕＯ催化剂的助催化作用。结果表明〈ＣｅＯ２是较好的助化组分，在ＣｕＯ催化剂中添加适量的ＣｅＯ２，可促进催化剂表面Ｃｕ＾＋含量的增加，从而有利于ＣＯ氧化催化活性的提高。     

氧化铈对负载型氧化铜催化剂的助催化作用

应用ＸＰＳ方法研究了ＣｕＯＣｅＯ２／Ａｌ２Ｏ３催化剂的表面特征，探索了ＣｅＯ２对ＣｕＯ催化剂的助催化作用．结果表明，ＣｅＯ２是较好的助催化组分，在ＣｕＯ催化剂中添加适量的ＣｅＯ２，可促进催化剂表面Ｃｕ＋含量的增加，从而有利于ＣＯ氧化催化活性的提高．     

甲醇催化脱氢新型催化剂的研究

研究甲醇催化脱氢ＺｎＯ／ＳｉＯ＿２催化剂及其添加剂的助催效应，并用ＥＤＡＸ和ＴＰＤ─ＭＳ法表征催化剂表面性质．结果表明：添加剂对甲醛产率的影响次序为Ｎｉ＞＞Ｍｇ＞Ｌｉ；不同制备方法改变表面Ｚｎ：Ｓｉ比．根据热力学平衡和主付反应产物的分布讨论了反应推理．     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

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-