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关键词： 绿色化工   分离工程   教学  

摘要： 笔者根据多年从事高等分离工程教学的经验,提出在该课程教学中重点通过突出健全传质单元转化效能的综合评价指标、强化二次能源和资源分布式综合利用途径、大力推进化工分离智能化运用等环节,帮助学生从发展理念到实施途径等多视角,逐步树立化工分离的绿色发展观。

关键词： 水处理   环境工程   膜分离技术  

摘要： 随着社会的发展,国家对环境的整治力度越来越大,由此产生了许多新型环境净化技术。其中,膜分离技术便是针对水处理的一项实用的科学技术。全球人口的增加、工业的发展,对水资源的需求不断增加,由于水资源是有限的,因此利用率的提高势在必行。膜分离技术可以对废弃用水进行处理,通过膜逐级分离过滤的方式将污染物从中脱离出来,将污染水变为可用水。论文主要针对膜分离技术在水处理环境工程中的应用进行探究。

关键词： 二硫化碳/硫化氢分离塔   立式热虹吸再沸器   HTRI  

摘要： 立式热虹吸再沸器是实现液体气化的重要单元设备,在化工行业应用广泛,但其设计较为复杂。二硫化碳/硫化氢分离塔再沸器作为一台重要的换热设备,其运行状况对分离塔的分离效果有较大影响。本文在介绍立式热虹吸再沸器基本工作原理的基础上,利用HTRI软件对二硫化碳/硫化氢分离塔底部的立式热虹吸再沸器进行优化设计。对气化率、安装高度、阻力损失等重要设计参数进行了讨论,以期对其它类似换热器的设计提供参考。

关键词： mathematical model   membrane   multistage process   optimization   process intensification   propane   propylene  

摘要： In this work, we explore the capabilities of an NLP optimization model to determine the viability of facilitated transport membrane processes intended to replace traditional distillation currently employed for propane/propylene separation. An NLP optimization model for multistage membrane processes has been formulated, introducing the mathematical description of the facilitated transport mechanisms in the PVDF-HFP/BMImBF(4)/AgBF4 membranes previously developed by our research group. For the first time, a simultaneous optimization of the process and the membrane material (i.e., carrier concentration) has been performed, thanks to the implementation of the governing equations for the fixed site and mobile carrier mechanisms. Once the model is solved in GAMS it returns the optimal membrane area, carrier loading and permeate pressure of each stage based on Net Present Value Cost (NPVC) minimization. Different process flow sheets were evaluated and the results show prominent reductions on NPVC for facilitated transport multistage processes when compared to distillation.

关键词： Nickel compounds  

摘要： Although Ni3N possesses superior hydrogen desorption behavior, its alkaline hydrogen evolution reaction (HER) catalysis is substantially hindered, due to the high-lying unoccupied orbital center induced sluggish water dissociation kinetics. Herein, we successfully endow Ni3N with exceptional alkaline HER activity by in situ interfacial engineering. The prepared Ni3N/MoO2 interfacial system delivers an ultra-small overpotential of 21 mV at 10 mA cm(-2), which is very close to that of the benchmark Pt/C catalysts. Density functional theory (DFT) calculations reveal that MoO2 with a lower unoccupied orbital center could substantially boost the water dissociation kinetics, while the hydrogen desorption proceeds on Ni3N. The capability to understand and design interfacial systems provides an effective pathway for the rational construction of HER catalysts and beyond.

关键词： 高放废液   分离-嬗变   工程化  

摘要： 从高放废液中分离锕系元素和Sr、Cs等裂变产物,是我国核燃料闭式循环体系的重要路径。目前,这项技术已完成实验室阶段的所有工作,具备工程化应用的条件。文章主要从工艺系统和安全措施的角度,探讨了高放废液分离技术工程化设计中的要点。

关键词： Chitosan   nerve tissue engineering   poly(L-lactic acid)   solid-liquid phase separation   thermally induced phase separation  

摘要： Polymeric scaffolds that support neural cell behaviors are attracting more attention. In the present study, solid-liquid phase separation technique is used to fabricate scaffolds made of poly(L-lactic acid) (PLLA) and chitosan (CS) blends to mimic both cellular microenvironment and anatomical structure of nerve tissue. The fabricated scaffolds favor characteristics of both natural and synthetic polymers. Different tests and assays including physical and mechanical ones (in vitro degradation rate, free radical release, hydrophilicity, and porosity measurements, microstructure observation, and mechanical tests) and cellular assays (cell attachment measurement and viability assessment) suggest that blend scaffolds prepared with this method support nerve cells for tissue engineering applications adequately and even better than scaffolds prepared with the same method but from pure PLLA or CS.

关键词： 制药工程   制药分离技术   应用发展  

摘要： 当前国民经济快速发展,人们生活水平进一步提高,人们越来越关注自己的身体健康,然而这些年来,环境问题越来越突出,人们的身体健康受到了很大的威胁,医药的创新逐步受到人们的重视,因此很多学者开始对制药工程技术进行深入的研究,制药分离技术是确保制药技术快速发展迅速展开的重要保障,所以一定要重视对制药工程分离技术的研究,本文重点对制药工程中的制药分离技术发展进行阐述,以供参考。