矿物包裹体爆裂测温曲线上的“相变峰”及其意义

矿物的相转变曾被认为是矿物包裹体爆裂法测温的影响因素之一。本文从矿物在加热过程中发生相转变和内部气液包裹体爆裂二者不同的作用机理,以及在爆裂曲线上不同的反映出发,通过一些实验和实例对比,探讨了矿物相变对爆裂法测温实际效果的影响,和所谓石英“相变峰”在岩体对比等方面的实际意义,得出矿物相变对爆裂法测温不会产生有害影响的结论。     

逆温天气与鄂尔多斯高原中小城镇大气污染

本文根据鄂尔多斯高原逆温天气的形成，讨论了高原地区中小城镇大气污染的时空分布及控制污染的可行性途径。     

冷轧带钢轧辊温度场及其控制

分析了冷轧过程中工作辊的温度变化及热凸度的形成 ,提出了控制热凸度的有效手段 ,对完善板型控制系统具有重要的意义     

Decomposition of CF3CI by corona discharge

In this paper pulsed corona discharge is shown to be effective for the decomposition of CF₃Cl(Freon-13).The pressure of CF₃Cl was 2.67×10³Pa,after discharged for 2 min,39.5% of CF₃Cl was decomposed.The products were mainly CF₄,Cl₂ and CF₂Cl₂.The yield increased by adding O₂ or air.Under the same conditions,more than 94% decomposition yield was obtained if 5.32×10³Pa O₂ or air was added.The composition of products became CF₂O,Cl₂ and CF₄.While the partial pressure of O₂ or air reached 1 arm,the decomposition yield decreased to 54.5% and 48. 5% respectively.     

Catalysts for decomposing ozone tail gas

The preparation of immobilizing-catalysts for decomposing ozone by using dipping method was studied. XRD, XPS and TEM were used to characterize the catalysts. The three kinds of catalysts were selected preferentially, and their catalytic activities were investigated. The results showed that the catalyst with activated carbon dipping acetate( active components are Mn:Cu = 3:2, active component proportion in catalyst is 15%, calcination temperature is 200℃ ) has the best catalytic activity for ozone decomposing. One gram of catalyst can decompose 17.6g ozone at initial ozone concentration of 2.5g/m^3 and the residence time in reactor of 0.1s. The experimental results also indicated that humidity of reaction system had negative effect on catalytic activity.     

难降解有机废水处理新技术

介绍了光氧化法、超临界氧化和低温等离子体化学三种废水处理新技术的原理,国内外研究的现状和未来的发展前景,分析了这些新技术在优化污染物废水处理方面得到工业应用所必须解决的主要技术问题.     

石墨炉原子吸收分光光度法测地面水中的铍

介绍了用石墨炉原子吸收分光光度计测定地面水中的铍的方法的建立     

Heterojunctioned CuO/Cu2O catalyst for highly efficient ozone removal

In recent years, near surface ozone pollution, has attracted more and more attention, which necessitates the development of high efficient and low cost catalysts. In this work, CuO/Cu₂O heterojunctioned catalyst is fabricated by heating Cu₂O at high temperature, and is adopted as ozone decomposition catalyst. The results show that after Cu₂O is heated at 180°C conversion of ozone increases from 75.2% to 89.3% at mass space velocity 1,920,000 cm³/(g·hr) in dry air with 1000 ppmV ozone, which indicates that this heterojunction catalyst is one of the most efficient catalysts reported at present. Catalysts are characterized by electron paramagnetic resonance spectroscopy and ultraviolet photoelectron spectroscopy, which confirmed that the heterojunction promotes the electron transfer in the catalytic process and creates more defects and oxygen vacancies in the CuO/Cu₂O interfaces. This procedure of manufacturing heterostructures would also be applicable to other metal oxide catalysts, and it is expected to be more widely applied to the synthesis of high-efficiency heterostructured catalysts in the future.     

一种富稀土型三效催化剂的性能考察

对一种富烯土型三效催化剂的性能进行了考察，结果表明：该催化剂具有较好的三效活性和较好的启燃温度特性，具有较宛的空速适应范围，在空速为84000h^-1时，CO,NOx的转化率仍在90％以上，HC转化率仍在70％以上，该催化剂具有较好的耐老化性能，经实验室快速老化实验，即相当于实车行驶8万km,CO劣化系数，1.09,HC劣化系1．05，NOx劣化系数1．06，该催化剂经桑塔纳轿车整车28工况测试，其交化效果与该车配置的美国Engelherd公司的催化剂相当。     

循环流化床锅炉床温控制方法

就目前电厂循环流化床锅炉运行中存在的床温波动问题，讨论了导致床温波动的因素，并针对性地提出了控制床温的一些措施。