Removal of formaldehyde at low concentration using various activated carbon fibers

Adsorption of low concentration formaldehyde on pitch‐based, rayon‐based, and PAN‐based activated carbon fibers (ACFs) and an unactivated PAN‐based carbon fiber (PAN‐CF) was investigated by a dynamic method. The pore structure and surface chemistry of these samples were characterized by liquid nitrogen adsorption, elemental analysis, and X‐ray photoelectron spectroscopy. Results revealed that the pore structure, especially surface chemical composition, greatly influence the formaldehyde adsorption. PAN‐based ACFs showed the highest formaldehyde adsorption capacity because there are more abundant nitrogen‐containing groups, especially pyrrolic, pyridonic, pyridinic, and quaternary on the surface. The breakthrough time and formaldehyde adsorption capacity of one kind of PAN‐ACF were 361 min and 0.478 mmol/g, respectively. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007     

电站金属部件计算机管理系统

电站金属部件计算机管理系统的由金属材料，工艺，蠕变，螺栓，异常，打印和退出等７个子系统组成，结束了用传统帐本式管理方法，可为机组检修的试验检查计划编制提供依据，更好地利用金属监督试验资料成为可能。     

组态软件中串口设备通信实现方法设计

本文分析了组态软件串口设备通信的原理及开发方法。并提出了一种使用VC 6．0开发组态软件串口设备通信模块的具体实现方法。     

基于智能卡和指纹识别的校园综合管理信息系统

本文介绍了智能卡和指纹识别技术．论述了智能卡在校园综合信息管理中的应用及其特点。提出了一种基于智能卡和指纹识别技术的校园综合管理信息系统的解决方案。     

空心锥状气相生长碳纤维的微观结构

以甲烷为碳源,硫酸亚铁为催化剂前驱体,通过化学气相沉积在石墨基板上制得了空心锥状炭纤维.采用扫描电子显微镜、X射线衍射、激光拉曼光谱、热失重等分析手段,以平直炭纤维为参照,对比研究了空心锥状炭纤维的微观结构特征.实验结果表明:空心锥状炭纤维由众多空心锥并串联而成,单个空心锥底面直径约1μm,锥高为几百nm;径向平面内三个底面直径约1μm,空心锥呈三角形紧密挟接;轴向方向相邻空心锥由单根纤维连接,形成的单束空心锥状炭纤维直径为约2～3 μm.与平直炭纤维相比,空心锥状炭纤维微观结构有序度较高,层间距较小,微晶尺寸较大.     

疏松砂岩、细粉砂岩油藏防砂堵水及大孔道封堵工艺技术

在疏松砂岩油藏注水开发中、后期,由于储层存在先天的非均质性,致使油、水井之间形成严重的高渗透大孔道现象,生产井出现特高含水及严重出砂的问题。为此研制了渗透率、胶结强度可调的无机胶结固化材料＂双效胶结砂＂,并依据选择性注入原理,实现对高渗透、大孔道深部低渗充填,同时对近井地带高渗封口,达到防砂堵漏的目的,解决了细粉砂岩油田油、水井的出砂和漏失问题。     

Improvements in performance and microstructure of doped graphites as plasma-facing materials by a new process

Multi-elemental (B, Si and Ti) doped graphite was prepared from fillers of petroleum coke, dopants and binder of coal tar pitch by a new liquid mixing method. Such composite has not only high thermal conductivity (233 W/m K) but also excellent mechanical strength compared with the material prepared by the conventional solid mixing method. Scanning electron microscopy (SEM) results show that such material has a fine-grained structure as well as little pore diameter. The effects of the manufacturing procedure of doped graphites on the performance and microstructure are investigated. In addition, correlations between properties and microstructure are also discussed in detail.     

Microstructure and property of SiC coating for carbon materials

SiC coating has been developed on four kinds of carbon substrates using a slurry-sintering method. The relationship between the microstructure and property of SiC coating and carbon substrates was investigated experimentally and theoretically. It was found that the pore radius of carbon substrates has marked effect on the microstructure and property of SiC coating. SiC gradient coating which is beneficial to improve the oxidation resistance for carbon materials, is expected to form on the surface of carbon substrate with the pore radius mainly over the range of 100-500 nm.     

全低变催化剂的失活原因及对策

针对全低变催化剂的失活情况进行分析，并提出解决办法。     

对一起炸药爆燃事故的分析与思考

米村煤矿曾经发生的一起炸药爆燃事故,导致矿井被迫停产56 h,直接经济损失508.45万元。介绍了事故的发生和救援过程,分析了事故发生的原因,并提出了安全防范措施。对煤矿的火工品管理和瓦斯管理具有重要警示作用。