变压吸附分离过程适宜操作条件的制定

本文以物料衡算为基础、产品收率为目标函数，讨论了变压吸附分离过程适宜操作条件的制定方法，对于指导变压吸附分离装置的设计和操作具有一定的实际意义。     

甲醇氧化生产甲醛装置的工艺查定与分析(Ⅲ)

在物料衡算的基础上 ,对整个装置进行了热量衡算。通过计算得出了装置加热蒸汽量、软水耗量、入蒸汽管网富余蒸汽量及吸收工段各塔自身循环量和冷却水耗量     

甲醇氧化生产甲醛装置的工艺查定与分析（Ⅲ）

在物料衡算的基础上，对整个装置进行了热量衡算，通过计算得出了装置加热蒸汽量，软水耗量，入蒸汽管网富余蒸汽量及吸收工段各塔各身循环量和冷却水耗量。     

内加热式热泵干燥装置的设计

内加热式热泵干燥装置通过导热加热方式提供物料中水分气化所需热能,可获得较高的能源效率和除湿能耗比。在介绍内加热式热泵干燥装置基本结构和工作过程的基础上,给出了其物料衡算、能量衡算和主要部件选型参数的计算公式,为内加热式热泵干燥装置的设计提供了较好的参考。     

Chem CAD在乙炔冷却工艺设计中的应用

应用化工流程模拟软件Chem CAD对乙炔装置生产工艺中的乙炔冷却塔冷却过程进行稳态模拟,在不同条件下,获得物料衡算和能量衡算的数据,通过比较,确定了合理的工艺过程参数。     

氯乙烯精馏尾气吸附回收过程

阐述了活性炭吸附氯乙烯的基本原理和氯乙烯精馏尾气吸附回收的流程，对吸附床进行了主要的物料衡算和设备主要尺寸计算，提出了主要控制参数，并进行了效益分析。     

氯乙烯精馏尾气吸附工艺探讨

阐述了 采用活 性炭“常压吸 附,正 压解 吸”氯 乙烯的 基本原 理及技 术特点 ,介绍 了吸附器的物料衡算和能量衡算。针对装置运行的状况探讨了有待完善和改进的问题。     

醋酸丁酯在活性炭纤维床层中的穿透曲线

研究了醋酸丁酯在活性炭纤维床层中的吸附过程 ,获得吸附速率方程和 Freundlich吸附等温方程的吸附级数、吸附平衡常数。将吸附速率方程、吸附等温方程与物料衡算相结合预测了其他条件下的穿透曲线。预测曲线与实验结果符合得较好。     

仪化聚酯装置新增第一酯化反应顺超设计能力运行热力学探讨

通过对仪化聚酯第八单元增容改造后新增的第一酯化反应器在超设计负荷条件下的物料衡算和热量衡算,估算出该反应热煤媒环量和传热 面积,为该装置高负荷运行提供了热力学依据。     

仪化聚酯装置新增第一酯化反应器超设计能力运行热力学探讨

通过对仪化聚酯第八单元增容改造后新增的第一酯化反应器在超设计负荷（３００ｔ／ｄ）条件下的物料衡算和热量衡算,估算出该反应器热媒循环量和传热面积,为该装置高负荷运行提供了热力学依据     

氯乙烯合成尾气回收工艺研究

从我厂氯乙烯合成及尾气回收系统的现状出发,深入考察了原料气纯度、合成转化程度、吸附器热平衡、吸附器解吸程度及尾气冷凝器等对氯乙烯尾气排放超标的影响,并考察了吸附器不同时间下的吸附效果.     

变压吸附制氮机均压方式的研究

简述了变压吸附制氮装置工艺流程、工作过程和均压方式。介绍了对变压吸附制氮装置等势平衡均压、不等势平衡均压、等势不平衡均压、不等势不平衡均压方式的实验结果,着重介绍了等势不平衡均压方式的特点。     

糠醛渣对刚果红的吸附性能研究

研究糠醛渣对染料的静态吸附.以刚果红染料为例,研究了糠醛渣对染料废水的吸附特性,考察了振荡时间、温度、吸附剂粒度和吸附剂剂量对糠醛渣吸附刚果红的影响,测试了吸附等温曲线.随着接触时间的延长,糠醛渣对亚甲基监的脱色率增加,60min后,吸附作用基本达到平衡.随着温度的升高,脱色率增加,糠醛渣对亚甲基蓝的吸附是吸热反应.随着粒度的增加,脱色率呈上升趋势.当糠醛渣剂量为0.6g时,其对亚甲基蓝的脱色率达90.72%.糠醛渣作为吸附剂处理含刚果红废水,是一种有效的方法.该方法实现了以废治废的废物资源化目标,具有良好的社会效益和经济效益.     

Effect of heat transfer on the transient dynamics of temperature swing adsorption process

The effect of radial heat transfer on temperature swing adsorption (TSA) was studied by using an air-drying TSA experiment. The experimental dynamics of water adsorption and thermal regeneration in a fixed bed packed with zeolite 13X were used to evaluate the predicted results from the developed models. One-and two-dimensional models for energy balance with various equations describing internal velocity were compared in terms of the prediction of transient dynamics of TSA. Since the heat effect in adsorption step depended on the isosteric heat of adsorption, a dynamic simulation was performed under adiabatic, near-adiabatic, and constant wall temperature conditions. A comparison between one-and two-dimensional models was also made under near-adiabatic condition, which reflected on the experimental condition. There was little difference between adsorption breakthrough curves predicted by the one- and two-dimensional models because the radial distribution of temperature was negligible at the adsorption step. In the case of the regeneration step, a small difference between two models was expected just at the early period of time because the radial effect disappeared with time. One-dimensional model could provide an adequate prediction of the transient dynamics in this system when the wall energy balance was included.     

黄河上游沉积物在不同pH值下对磷酸盐的吸附特征

研究了黄河上游10个不同表层沉积物在不同pH下对磷酸盐（P）的吸附动力学和吸附热力学的影响,并分别采用了不同的等温吸附模型对实验数据进行了拟合,比较了各自的适用性。结果表明：1沉积物对P的吸附量随时间增长而增大,在48h基本达到吸附平衡,不同沉积物具有相同变化趋势,但吸附能力有明显差异。2不同沉积物在不同pH值下对P的等温吸附具有相同的线性变化趋势,但吸附容量随沉积物不同而异,其中8个沉积物对P的吸附量在接近中性时最大,随pH值增大或减小均表现为下降,且变化幅度均随沉积物不同而异;而其余两样品的吸附量在pH为9.0时最大,pH为6.0时最小。3不同pH条件下,沉积物对P的吸附行为很好地符合线性方程和Freundlich模型,同时对Lang-muir模型也具有较好地拟合效果。     

Scale-up effects due to near-wall channelling in isothermal adsorption columns: on the limitations in the use of plug flow models

The influence of the near-wall channelling phenomenon on the scale-up effects of adsorption column is analysed numerically. The radial fluid velocity profile is approximated by using the extended Brinkman model. The broadening of breakthrough curves during a change in adsorption column diameter is predicted either from the two-dimensional model of non-linear, favorable adsorption with local fluid velocity included directly in the differential mass balance equation or from the plug flow model with the influence of the flow distribution involved in the value of the effective axial dispersion coefficient. The predicted scale-up parameters are compared with available experimental data. Under discussion are the operating conditions which make the scale-up effects due to near-wall channelling significant and possible improper application of the dispersed plug flow model.     

改性污泥处理含铍废水的吸附特性研究

提出了用改性污泥处理含铍废水的新方法,解决了含铍废水达标难的问题。研究了铍在改性污泥上的吸附平衡和吸附动力学,考察了温度、pH对吸附过程的影响。结果表明:铍在改性污泥上的吸附等温线数据可用Fruendlich方程描述,而不能用Langmuir方程描述;铍的吸附过程遵循二级吸附动力学模型,也能用Lagergren一级速率方程描述;温度对吸附结果影响不大,pH为吸附过程的主要影响因素。     

How does the shape and surface energy of pores affect the adsorption of nanoconfined fluids?

We report a systematic molecular simulation study of the behavior of Lennard–Jones fluids inside nanopores of diverse shapes, focusing on the effect that the pore geometry and the local energetic environment have on the adsorption isotherms. Infinitely long pores with polygon (triangle, square, pentagon, hexagon, octagon, decagon, and circle) cross sections are considered. Three different pore sizes commensurate with the molecular diameters along with three different values of fluid–solid energy interactions are chosen to perform Grand Canonical Monte Carlo simulations at a subcritical temperature. Overall, the effect of nanoconfinement on the adsorption of fluids is seen to be a delicate balance between the geometric packing restrictions imposed by the hard cores of the molecules and the surfaces, the excess adsorption induced by the presence (or absence) of energetically favored “hot spots” and the overall ratio of surface/bulk fluid volume present in the pore.