膨润土负载型低铜含量甲醇制氢催化剂的制备及其性能

以膨润土为载体,采用浸渍法制备了低铜含量负载型CuO/膨润土催化剂,考察了铜含量对催化剂物化性能和甲醇制氢反应性能的影响.结果表明,铜含量对催化性能有显著影响,随铜含量的增加,甲醇转化率和CO选择性均呈现出先升高后降低的趋势,在铜含量为13.8wt％时,甲醇转化率为84.7％,一氧化碳选择性为92.5％.CuO/膨润土...     

多层百叶窗式挡板对三相流化床中固体颗粒轴向分布的影响

针对作者开发的带有导管与多层百叶窗式挡板特殊构型的三相流化床反应器, 实验考察了百叶窗式挡板层数与挡板倾角构型参数、气体与浆液流量操作参数对床内固体颗粒轴向浓度分布及粒度分布的影响.实验结果表明, 百叶窗式挡板的层数是影响固体颗粒轴向浓度分布及粒度分布的主要因素,当百叶窗层数多于15层时, 挡板上下方分区明显.并就挡板影响颗粒分布的可能机制进行了分析讨论.     

生物质型煤的研制与应用

生物质型煤是一种新型型煤,是利用粉煤、生物质等通过一定的生产工艺制作而成,不仅有利于节约能源,同时也可以减少环境污染.文章重点介绍了水分、生物质添加量、粘结剂、原料煤粒度、成型压力、熟化过程、干燥程度对生物质型煤冷强度的影响,添加剂、生物质、配煤量以及煤的种类对生物质型煤热强度的影响.文章还分析了生物质型煤与生物质和煤在燃烧速度和着火性能上的区别,固硫效果与所加固硫剂量之间的关系,并提出了生物质型煤作为气化型煤今后应开展的研究方向与课题.     

浅议我国超细碳酸钙生产现状、问题及对策

阐述了我国超细碳酸钙生产现状和存在问题，提出了解决这些问题的对策措施。     

惰性粒子喷动床中制备超细碳酸钙的实验与建模

A novel reaction-drying process was carried out in a spouted bed reactor with inert particles and used to prepare ultrafine CaCO3 particles. Effects of concentrations of CO2 and Ca(OH)2, and reaction temperature on Ca(OH)2 conversion were experimentally investigated. The particle sizes and composition of CaCO3 produced were characterized with transmission electron microscopy (TEM) and X-ray diffraction (XRD). The results indicated that ultrafine CaCO3 particles with mean size of 80 nm could be obtained with this novel process.By modifying the Arrhenius Equation and considering the Ca(OH)2 state, a kinetic model was established to describe the process in the spouted bed. The model parameters estimated from the reaction-drying experiments were found to fit well the experimental data, indicating the applicability of the proposed kinetic model.     

A Sedimentation-Dispersion Model for both Non-attached and Attached Particles in Three-Phase Batchwise Fluidized Beds

The axial concentration distribution of both particles with better wetting (forming non-attached system) and poorer wetting (forming attached system) was investigated in a vertical gas-liquid-solid fluidized bed of 4.2 cm in diameter and 130 cm in height with the solids holdup less than 0.05. The one-dimensional sedimentation-dispersion model could be used satisfactorily to describe the axial distribution of solids holdup by modifying only a model parameter, i.e. by means of the terminal settling velocity minus a certain value, which is a function of gas velocity and considers the effect of an additional drag force resulted from attached rising bubbles. The axial profiles of solid concentration predicted are in good agreement with experimental results. This model also explains reasonably the different axial distributions of solid concentration, i.e. the solids holdup decreases as the axial height increases in non-attached system, but increases with the axial height in attached system at a given gas veloc     

面向终端用户动态构造企业MIS

本文简要论述了企业管理对MIS的要求以及企业管理需求的特点，提出了面向终端用户动态构造企业MIS的方法——SY方法。以适应企业管理不断发展变化的需求，介绍了SY方法的主要目标、基本原则以及基于SY方法开发企业MIS的特点和过程等。     

基于SY方法的MIS开发与实现

该文简要介绍了ＳＹ方法的基本思想，包括基于ＳＹ方法的ＭＩＳ开发模式，ＭＩＳ体系结构以及集成开发环境等；分析了在用户需求基础上设计数据字典和功能说明的内容及积术块的设计原则和设计步骤；讨论了应用系统的定义，动态构造和实现过程以及系统维护和动态调整方法；特别强调了面向对象技术和软件重用性在ＳＹ方法中的作用。     

新余钢铁厂炼焦精煤合理灰份值的优选计算

炼焦精煤的灰份含量应该有一个合理的取值。从炼焦、炼铁的角度出发,灰份越低越好。从煤矿和洗煤厂的角度出发,过多地降低灰份又会使精煤回收率下降,洗精煤成本升高。这个矛盾应该在有利于整个国民经济的基础上加以统一,应该兼顾权衡两者的