探讨电石法PVC烟气治理方法

分析了电石法PVC生产链中电石炉烟气及电厂烟气二氧化硫的排放情况,指出利用电石炉烟气中的CO合成氨、再将合成氨用于燃煤电厂烟气的"氨法"脱硫是具有较大应用潜力的循环经济产业链。     

解吸塔换热器706C结堵的原因分析及其对环保装置正常运行的影响

本文详细分析了解吸塔换热器结堵的原因和对环保装置正常运行的影响,并针对性地提出了防范和处理措施。     

Effect of surfactants and liquid hydrocarbons on gas hydrate formation rate and storage capacity

Hydrate formation rate plays an important role in making hydrates for the storage and transport of natural gas. Micellar surfactant solutions were found to increase gas hydrate formation rate and storage capacity. With the presence of surfactant, hydrate could form quickly in a quiescent system and the energy costs of hydrate formation reduced. Surfactants (an anionic surfactant, a non‐ionic surfactant and their mixtures) and liquid hydrocarbons (cyclopentane and methylcyclohexane) were used to improve hydrate formation. The experiments of hydrate formation were carried out in the pressure range 3.69–6.82 MPa and the temperature range 274.05–277.55 K. The experimental pressures were kept constant during hydrate formation in each experimental run. The effect of anionic surfactant (sodium dodecyl sulphate (SDS)) on natural gas storage in hydrates is more pronounced compared to a non‐ionic surfactant (dodecyl polysaccharide glycoside (DPG)). The induction time of hydrate formation was reduced with the presence of cyclopentane (CP). Cyclopentane and methylcyclohexane (MCH) could increase hydrate formation rate, but reduced hydrate storage capacity The higher methylcyclohexane concentration, the lower the hydrate storage capacity. Copyright © 2003 John Wiley & Sons, Ltd.     

Structural Changes in Titin and Nebulin Filaments Specific to Calcium Ions at 0.1 mM: Factors of Meat Tenderization During Postmortem Aging

ABSTRACT Postmortem structural changes in titin and nebulin filaments were investigated by incubating isolated myofibrils in a solution containing 0.1 mM calcium ions and various concentrations of a protease inhibitor. The inhibition curves showed 2 abnormal steps with increases in the concentration of leupeptin or calpastatin domain I. While the amounts of unchanged titin and nebulin were constant in the 1st step, the 2nd occurred at higher protease inhibitor concentrations. These facts indicated that excess amounts of leupeptin and calpastatin domain I caused deterioration in titin and nebulin properties, thus interfering with the binding of calcium ions. We concluded that the severance of titin and nebulin filaments in the 1st step were induced by calcium ions at 0.1 mM.     

海底沉积物中天然气水合物生成和分解规律研究进展

对国内外有关海底沉积物中天然气水合物生成和分解规律方面的研究进行了详细调研,得到如下结论:天然气水合物的生成和分解条件在海底沉积物中与在井筒、管道中有明显不同,其主要原因是多孔介质中流体与孔隙壁面间的界面效应对海底沉积物中天然气水合物的形成条件会产生明显影响;在海底沉积物中天然气水合物生成和分解条件的数值模拟技术研究方面,研究者大都假设以天然气水合物作为盖层的成藏类型,借助常规油气藏数值模拟技术进行模拟研究;影响海底沉积物中天然气水合物生成和分解条件的因素很多,因此海底沉积物中天然气水合物生成和分解规律研究必须借助试验模拟、数值模拟和现场测试相结合的综合方式进行。该调研成果可为今后天然气水合物经济有效开采技术方案选择和进行天然气水合物危害控制等提供参考。     

热重分析对高分子材料中碳酸钙的定量研究

碳酸钙是高分子材料中常用的无机填料，在高温时会同二氧化碳而失重。利用热重分析可准确定出高分子材料中碳酸钙的含量，同时还可测出聚合物，挥发物的含量，热重分析法样品用量小，灵敏度高，所需时间短。     

用碳化养护电弧熔炉钢渣制备集料和混凝土

将电弧熔炉(electric arc furnace,EAF)钢渣和石灰混和制成球状集料,置于密闭容器当中,并通入100%的CO2气体进行碳化,在0.506 6MPa保持2h.通过质量法测定添加质量分数为11.94%石灰的EAF钢渣(下同)集料CO2的吸收率为5%,通过红外光谱(infrared,IR)分析测定CO2的吸收率为13.88%.用碳化的钢渣集料制备混凝土再进行碳化养护,同时利用碎石和河砂为集料制备碳化混凝土作为参比样.用质量法测定2种混凝土的碳化率分别为21.14%和10.57%;用IR法的为13.81%和16.97%.碳化后电弧熔炉钢渣集料内生长着大量簇生的犬牙状碳酸钙晶体.     

水分对高碱值硫化烷基酚钙结构和清净性的影响

采用傅立叶红外光谱仪，分析了水分对清净剂高碱值硫化烷基酚钙结构组成的影响；采用热管氧化试验法和曲轴箱模拟试验法，考察了高碱值硫化烷基酚钙在加水前后清净性能的变化；采用四球试验机和高频往复试验机，分析了水分对高碱值硫化烷基酚钙润滑性能的影响。结果表明，油中的水含量对高碱值硫化烷基酚钙的水解安定性能影响较大，并且随着水含量的增加，油品的清净性能和抗磨性能变差。     

中碱值硫化烷基水杨酸钙的制备及性能研究

介绍了一种碱值达170mgKOH／g以上、硫含量大于3．0％、钙含量大于6．0％的硫化烷基水杨酸钙盐润滑油添加剂的制备过程及其性能。实验中重点考察了促进剂及硫磺加入量对产品碱值及硫含量的影响；通过冷冻蚀刻电镜法观察了含碳酸盐的胶体粒子结构及粒度分布情况；应用凸轮挺校、四球试验机等考察了硫化烷基水杨酸钙盐产品的极压抗磨性能。结果表明，硫化烷基水杨酸钙产品不但具有良好的高温洁净性、抗氧化安定性、胶体稳定性，而且具有突出的极压抗磨性及热稳定性。     

真空钙热还原炉渣的综合利用研究

研究了从真空钙热还原炉渣中回收稀土的工艺条件；采用本工艺得到的合格稀土溶液，其回收率达65．41％；副产品氟化钙用作炼硅铁合金的助熔剂，使钙热还原炉渣得到综合利用。