FH-5A 加氢精制催化剂的研制

为适应加工高硫馏分油的需要，研制成功了加氢精制催化剂FH－5A。该剂以含硅氧化铝为载体、Mo-Ni为活性组分，并添加少量助剂而制得。FH－5A工业放大催化剂在氢分压3．4MPa、空速2．5h^-1、反应温度350℃的加氢条件下在小型装置处理伊朗催化裂化柴油和沙特轻质直馏柴油的混合油（30：70），可将原料油中硫含量由9000μg/g，氮含量由432μg/g降至47μg/g。评价试验表明，FH－5A加氢精制催化剂可满足中东高硫直馏柴油、二次加工柴油及其混合柴油加氢精制的需要。     

燃料电池质子交换膜的研究进展

本文从质子交换膜的发展入手 ,指出全氟磺酸型质子交换膜是目前最适合燃料电池的膜材料 ,并对其结构特点及优缺点进行了重点分析 ,论述了目前质子交换膜的发展趋势     

Mechanical and thermal properties of HVOF sprayed Ni based alloys with carbide

The objective of the present study is to develop multi-functioned coating to the components, which are made of copper with electroplated Ni and are widely used for steel making industry. In this paper, we report the mechanical and thermal properties of Ni based superalloys with carbide sprayed by high velocity oxygen fuel (HVOF), and the detailed effects of sprayed material, spraying conditions, and initial powder structure on these properties. It was found that, among commercial Ni self-fluxing alloys (without fusing treatment), coating with a carbon content of 0.58 mass% had the most preferable properties, with a good balance of the hardness, strength, and thermal shock resistance. The thermal shock resistance depended not only on the strength of the coating but also on the volume contraction when tested at high temperatures. For the several developed Ni based superalloys with carbide, Ni20Cr8Mo5Fe–WC and Ni16Cr15Mo3–WC demonstrated the prominent adhesion strength and thermal shock resistance with high Galvanic corrosion resistance through optimized spraying condition. Also, 20 mass% NiCr–Cr₃C₂ coating sprayed by using employed relatively small primary particle succeeded in achieving the multi-superior properties; high adhesion strength, high corrosion resistance and thermal shock resistance.     

大型钢制焊接双层低温储罐设计建造

介绍了大型钢制焊接双层低温储罐的结构形式、选材、建造、检验及保冷要求 ,结合所设计的低温液氨储罐 ,对设计建造这类储罐必须考虑的一些问题作了分析     

滩海油罐CAD/CAG

根据滩海油田地区环境条件的特殊性,认为取50年一遇的3秒钟瞬时风速作为计算依据更切合实际,给出了相应的抗风设计方法和设计公式,根据最新储油罐抗震理论编制了验算程序.将计算机辅助设计与辅助绘图集成一体,形成了一套完整的储油罐CAD/CAG系统.该系统省去了过去人工计算需要查取数据的麻烦,可以自动检索,并完成各项分析计算和全套施工图的绘制工作.速度快、准确性高,直接输出透明图,整洁规范.该系统正用于实际设计生产.     

汽车燃料质量发展新趋势

从现在到21世纪初,汽车燃料质量主要按照减少排气污染的思路来设计。汽油和柴油的发展趋势是:低硫、低芳烃、低90％馏出温度和高清净性。     

Catalytic steam reforming of methane over La0.8Sr0.2CrO3 based Ru catalysts

La_0.8Sr_0.2CrO₃ based Ru catalysts were studied as potential new anodic materials for Solid Oxide Fuel Cells directly fed with methane and operating at intermediate temperature under water deficient conditions. Two kinds of materials very close in composition were obtained following two different preparation procedures. Catalyst samples were characterized by physicochemical methods (XRD, SEM, BET and Chemical Analysis) and studied in methane steam reforming under water deficient conditions. Carbon formation during catalytic testing was studied by temperature programmed oxidation (TPO). Both types of catalysts were found very active and resistant to carbon formation. The unusual oscillatory behavior of the catalytic activity observed for one type of catalyst was discussed.     

注浆法在已建油罐地基加固中的应用

在一定的压力作用下,将水泥浆注入松散的地基土中,浆液凝固后将松散的土粒固结在一起,对地基进行加固。这种方法具有省时、省工、省费用、使用简单方便等优点。特别是对已建油罐地基的处理更有其独到之处。由于钻孔可在任意角度下进行,因此可对罐基础任何区域进行加固并达到较好的效果。文章对钻孔布置、钻孔、注浆花管布置、压力灌浆、充水预压等几项关键技术进行了较详细的论述。     

Effect of water inlet velocity on thermal stratification in a mantled hot water storage tank

Thermal stratification in a mantled hot water storage tank is analysed numerically for different water inlet velocities. The aim is to obtain higher thermal stratification and supply hot water for usage as long as possible. Twelve different water inlet velocities to the hot water storage tank are considered. The numerical method is validated by comparing its results against experimental and numerical results from the literature. It turned out that the results obtained from the numerical analysis have shown very good agreements with the results from previous works. As a result, the water temperature in the tank increases with the increase of the water inlet velocities to the mantle but this increment is not proportional. After a period of operation of 7.2 h, which corresponds to the average sunshine duration in Turkey, temperature increments of 6.5 and 35 K have been estimated for the hot water inlet velocities of 0.01 and 0.3 m s^?1, respectively, at a radial distance of 0.1 m and a height of 1 m inside the storage tank. Copyright © 2005 John Wiley & Sons, Ltd.     

Promising alloys for intermediate-temperature solid oxide fuel cell interconnect application

The formation of a low Cr-volatility and electrically conductive oxide outer layer atop an inner chromia layer via thermal oxidation is highly desirable for preventing chromium evaporation from solid oxide fuel cell (SOFC) metallic interconnects at the SOFC operation temperatures. In this paper, a number of ferritic Fe–22Cr alloys with different levels of Mn and Ti as well as a Ni-based alloy Haynes 242 were cyclically oxidized in air at 800 °C for twenty 100-h cycles. No oxide scale spallation was observed during thermal cycling for any of these alloys. A mixed Mn₂O₃/TiO₂ surface layer and/or a (Mn, Cr)₃O₄ spinel outer layer atop a Cr₂O₃ inner layer was formed for the Fe–22Cr series alloys, while an NiO outer layer with a Cr₂O₃ inner layer was developed for Haynes 242 after cyclic oxidation. For the Fe–22Cr series alloys, the effects of Mn and Ti contents as well as alloy purity on the oxidation resistance and scale area specific resistance were evaluated. The performance of the ferritic alloys was compared with that of Haynes 242. The mismatch in thermal expansion coefficient between the different layers in the oxide scale was identified as a potential concern for these otherwise promising alloys.