控制煤和油页岩燃烧排放SO2污染物的研究进展

本文从分析我国大气污染的特征入手，探讨了煤和油页岩资源的合理利用途径，进行了降低燃煤排放ＳＯ２的方法比较，评述了煤和油页岩流化床燃烧过程中硫释放和脱除研究的现状，指出有待深入研究的问题有：（１）灰分的自固硫；（２）煤和油页岩含水量对脱硫的影响；（３）挥发分燃烧的火焰能量对颗粒油页岩燃烧排放ＳＯ２的影响；（４）煤和油页岩燃烧过程中硫释放的机理和本征动力学；（５）石灰石中惰性杂质对固硫性能的作用。     

基于业务驱动的“一张图”数据动态更新机制研究

在分析国土资源管理业务模型及"一张图"数据库关系的基础上,重点阐述基于业务驱动的"一张图"数据动态更新机制的原理、实现技术,并在成都市开展应用示范。本文提出基于业务并借助数据捕获、ETL工具实现"一张图"数据动态更新的新思路,为国土资源动态监管、分析核查与决策、防灾减灾提供数据支撑和信息服务。     

预应力长锚杆加固理论探讨

通过岩体剪切破坏分析，找出最危险剪切破坏面，再用合理结构的预应力长锚杆或长锚索提供的有效抗剪力，消除岩体最大破坏剪应力，以过到加固边坡不稳定滑动岩体目的。     

柔软热收缩材料的研制

总结了经共混和辐射交联制备柔软耐老化的热收缩材料的研制过程。测得了不同乙丙橡胶含量和不同辐照剂量下的共混物的力学性能和凝胶含量，确定了共混物辐射交联的合适剂量。此外，还测试了ＥＰＤＭ和ＰＥ共混物经辐照后的耐油性能。在此基础上，制得了手感柔软的热收缩管材。     

治理铬渣的两个关键

铬渣中存在的酸溶性六价铬是解毒效果能否持久的关键，而铬渣中游离氧化镁消化是利用铬渣作建筑材料时必须高度重视的问题，论述了湿法解毒、高温解毒和非熔融的综合利用法等方法，对铬盐行业的铬渣治理有指导作用。     

Influence of oxidation on heat-treated activated carbon support properties and metallic dispersion of Ru/C catalyst

Heat-treated activated carbon has been oxidized to improve the properties related to the use as a support for the preparation of 5wt% Ru/C catalysts by impregnation. The pore structure, surface oxygen groups of the heat-treated activated carbon before and after oxidation in the gas and liquid phase, as well as catalytic activities and dispersion of Ru in the catalysts were investigated systematically. The pore structures of the samples were characterized by N₂ physisorption. Temperature-programmed desorption (TPD) was conducted to determine the chemical properties of the samples. Ru dispersion was measured by CO pulse chemisorption. The effects of oxidation treatments on carbon surface chemistry and pore structure which are closely related to Ru dispersion and catalytic activity, was examined. Furthermore, the modified heat-treated activated carbon support obtained by gas phase oxidation in CO₂ and liquid phase oxidation in nitric acid was more suitable to prepare Ru-based catalysts for ammonia synthesis than that without treatment.     

气体作自然对流时温度场测量中的全息层析技术

<正>1 引言 激光全息干涉技术是进行三维流场实验研究的重要手段之一.三维流场的全息层析,实际上就是在同时获得三维流场多方向干涉图的基础上,把三维流场分成一组平行的截面,根据多方位的干涉数据,由计算机分别对不同的截面重建三维流场的参量分布.由于这一方法     

不同分子量聚酯的羟值分析方法

用醋酐／高氯酸／乙酸乙酯法，醋酐吡啶回流法，分别对相对分子质量为１１００－１２０００的聚酯进行了羟值的测定，并用气压渗透法和析出物溶解重滴法进行了核对。结果表明醋酐／高氯酸／乙酸乙酯法对于Ｍ〈５０００的聚酯是适用的，而高分子量的聚酯则必须用醋酐／吡啶回流法，才能获得满意的结果。     

Reaction selectivity of <Emphasis Type="Italic">Burkholderia cepacia</Emphasis> (PS-30) lipase as influenced by monoacylation of <Emphasis Type="Italic">sn</Emphasis>-glycerol

Reaction selectivities were determined in multicompetitive reactions mediated by Burkholderia cepacia lipase (Amano PS-30) at a water activity of 0.19 in hexane. Saturated FA (C4–C18 even chain) and oleic acid (C18∶1) were reacted with a single alcohol, glycerol, α-or β-MAG, containing C4, C10, C16, or C18∶1 individually as alcohol cosubstrate. Similar odrinal patterns of FA selectivity, with C8, C10, and C16 preferred over others, were generally observed for incorporation of FA into specific acylglycerol (AG) pools of the 24 specific cases evaluated. The three exceptions were enrichment of C14 and C18 in the MAG pool with α-C16-MAG, substrate, and a general suppression of >C8 incorporation into the TAG pool for reactions with α-C10- and α-C16-MAG. PS-30 lipase selectivity toward MAG was in descending order: α/β-C4-MAG>β-C10-MAG>β-C16-MAG>α/β-C18∶1-MAG>α-C10-MAG>α-C16-MAG. Selectivity in channeling CX of the original CX-MAG substrates into higher AG species was in descending order: α-C10-MAG∼α-C16-MAG>α-C18∶1-MAG>β-C10-MAG∼β-C16-MAG∼β-C18∶1-MAG >α/β-C4-MAG. Generally, MAG were better acyl donors than FA for esterification reactions leading to DAG formation. These observations are relevant to the design of biocatalytic processes intended to yield specifically structured TAG.     

软贴面聚氨酯板材连续生产线简述

介绍了软贴面聚氨酯夹芯板材连续生产线设备的主要组成部分,对生产工艺、发泡液面的控制、理论密度的算法等做了详细介绍,并对在生产过程中,工艺参数对产品质量的影响做了深入分析,以助国内同行参考。