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关键词： Lithium isotope   Isotope separation   Ion exchange   Chromatography  

摘要： We have been studying the lithium isotope separation by ion exchange chromatography for the engineering development. We performed the lithium isotope separation experiments by chromatography. From the results, we estimated the migration lengths required to obtain the 20 %, 50 %, and 90 % enriched lithium-6, the required lengths are 340, 1600, and 5800 m, respectively. We studied the detection methods of lithium adsorption band boundary in order to design the circular type chromatographic equipment, which type equipment is required for the industrial plant. Based on these investigations, we designed the automatic circular type chromatographic equipment with the boundary interface detector and manufactured the prototype equipment.

关键词： Distance teaching   Thermal engineering   Separation processes   3D design and printing   Experimental laboratory   COVID-19  

摘要： The SARS-CoV-2 virus pandemic has meant that face-to-face teaching activities have had to be replaced by distance learning. Experimental laboratories have been replaced, in most cases, by the utilization of experimental data or by simulations. In this work, we have designed four laboratory experiments to be conducted by students of thermal engineering and separation processes during confinement by COVID-19 at home, to maintain competence acquisition and learning outcomes. A mixed methodology of the educational models of autonomous learning and cooperative learning has been used in obtaining the experimental data and writing the laboratory report. Installations for thermal engineering have been 3D designed and printed and are aimed at studying the heat transmission by conduction and convection in heat exchangers. This work describes in detail the activities carried out and shares the files used in the 3D printing of the installations. The laboratory experiments of separation processes are focused on the removal of a dye (rhodamine B) from an aqueous solution by liquid-liquid extraction and adsorption. A survey made to the undergraduate students has confirmed that the methodology and installations designed have been satisfactory for their expectations on the acquisition of knowledge and skills in both subjects. (c) 2021 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.

关键词： nanostructured ceramics   intergranular region   segregation engineering   ion segregation   inorganic phosphors   grain growth   photoemission properties  

摘要： Nanostructured segregates of alkaline earth oxides exhibit bright photoluminescence emission and great potential as components of earth-abundant inorganic phosphors. We evaluated segregation engineering of Ca2+- and Ba2+-admixtures in sintered MgO nanocube-derived compacts. Compaction and sintering transform the nanoparticle agglomerates into ceramics with residual porosities of Phi = 24-28%. Size mismatch drives admixture segregation into the intergranular region, where they form thin metal oxide films and inclusions decorating grain boundaries and pores. An important trend in the median grain size evolution of the sintered bodies with d(Ca(10 at. %)) = 90 nm < d(Ba(1 at. %)) = 160 nm < d(MgO) = 250 nm similar to d(Ca(1 at. %)) = 280 nm < d(Ba(10 at. %)) = 870 nm is rationalized by segregation and interface energies, barriers for ion diffusion, admixture concentration, and the increasing surface basicity of the grains during processing. We outline the potential of admixtures on interface engineering in MgO nanocrystal-derived ceramics and demonstrate that in the sintered compacts, the photoluminescence emission originating from the grain surfaces is retained. Interior parts of the ceramic, which are accessible to molecules from the gas phase, contribute with oxygen partial pressure-dependent intensities to light emission.

关键词： 制药工程   制药分离工程   教学改革  

摘要： 未来新兴产业和新经济发展迫切需要新型工科人才支撑。面向“新工科”创新人才培养的目标,我们针对传统“制药分离工程”课程教学形式单一、工程实践环节薄弱及学生积极性不高等特点,以兴趣为导向,围绕培养具有工程实践能力、创新能力的高素质复合型人才目标,开展了包括改革教学方式、优化教学内容以及加强创新实践活动等一系列教学改革,探索新工科背景下的制药工程创新人才培养模式。“制药分离工程”教学实践探索受到学生的积极反馈,并取得了显著的教学效果。

关键词： 软基处理   水气分离式   真空预压  

摘要： 真空预压法加固软土地基常规采用射流泵实现抽真空压力,但采用射流泵存在效率低浪费电力资源,以及地基处理后期因竖向排水板堵塞使得排水固结效果降低等弊端。本文将施工过程中水气分离泵真空预压法与常规射流泵真空预压法在地基处理的质量效果、经济效益和施工部署三个方面进行对比,通过数据比对寻找差距,从而用实际数据来论证水气分离式真空预压技术在软基处理应用中的优越性,以期为相关类似工程起到参考作用。

关键词： 生物分离工程实验   研究生   教学模式改革  

摘要： 生物分离工程实验是生物工程专业研究生的专业基础课程,对于锻炼学生的动手能力、培养学生科研创新素养具有重要作用。在分析了生物分离工程实验教学中存在问题的基础上,结合新工科教育大背景,采取多项举措如开设虚拟实验、利用公共实验平台、结合研究生科技创新计划及案例式教学等对该课程的教学模式、考核方式等尝试进行改革和探索,取得了一些初步成效。

关键词： 生物分离工程   研究式教学   实践   创新能力  

摘要： “生物分离工程”是生物工程专业的必修专业课,是一门理论性和实践性都很强的课程.提升“生物分离工程”课程教学质量是生物技术迅速发展和社会应用型人才需求增加的必然要求.分别从优化更新教材和教学内容,调整课程内容体系,开展研究式教学,完善实践教学体系,建立多维考核评价体系等角度,探讨改善和提高“生物分离工程”课程教学质量的对策,提出了以研究式教学和实践教学为核心的学生创新能力培养思路.

关键词： 化工分离工程   Excel   多组分吸收   流率加和法  

摘要： 在化工分离工程教学中,应用Excel软件采用流率加和法对多组分吸收过程进行严格计算,快捷、简便,计算结果准确,学生无需编程就能进行复杂的多组份多级分离严格计算,激发了学生的学习兴趣,提高了学生解决复杂工程问题的能力。

关键词： 分离式隧道工程   二次衬砌   充填压浆   施工技术  

摘要： 为了探讨分离式隧道工程二次衬砌及充填压浆施工技术的应用效果,通过G211印江至思南段公路改扩建工程实际情况,以施工的重难点为切入点,从二次衬砌和充填压注浆两个方面,分析了分离式隧道工程的施工要点及经验。分离式隧道工程作为高速公路施工中常用的隧道工程形式,能够很好地解决相互施工造成的不良影响,加大二次衬砌和充填压浆施工技术的应用,能够更好地保证施工质量,降低隧道围岩和地质条件造成的影响,保证施工进度和施工的安全性。