变压吸附气体分离技术应用及展望

介绍了变压吸附技术在提纯氢气、制取富氧、脱碳、提纯一氧化碳、回收氯乙烯精馏尾气及提纯煤气层甲烷等工业生产过程中的应用及技术现状,展望了变压吸附气体分离技术的发展前景。     

利用变压吸附气体分离技术从合成氨弛放气中回收氢气

变压吸附（PSA）气体分离是一种高效、节能的回收提纯技术,其在石化、化工行业得到了越来越广泛的应用。早在60年代,美国联合碳化物公司就开始采用变压吸附分离技术从含氢工业废气中回收提纯氢气。到70年代中期,变压吸附分离提纯技术得到了迅猛发展。至今,世界各约有800余套变压吸附分离提纯装置在运行,规模从100－7000m^3/h（标态）。原化工部西南化工研究院是我国最早进行变压吸附分离纯技术研究开发的单位之一,其研制的变压吸附分离提纯装置在我国得到了广泛的应用。我所在90年代中期开始对变压吸附分离提纯技术进行研究开发,并成功地解决了变压吸附工业装置大型化的相关问题,在短短的几年内设计建造了数十套不同规模的变压吸附分离提纯制氢装置,气源种类也日益扩大,其中包括合成氨弛放气和变换气、甲醇尾气、催化干气、加氢尾气、焦炉煤气、城市煤气等多种含氢气源。     

变压吸附技术的发展及其用于焦炉气制氢

本文简述了变压吸附技术的发展,介绍了以煤制炭分子筛为吸附剂,用该技术分离空气制取富氮的原理及工艺过程,并与传统的深冷法制氮工艺进行了比较;同时,还介绍了用变压吸附技术从焦炉煤气中回收而纯氢气的新方法。     

变压吸附技术在甲醇工业中的应用

变压吸附(Pressure SwingAdsorption，PSA)这一概念由H．Kahle于1942年在德国申请专利时提出的，变压吸附的基本原理是利用气体组份在固体材料上吸附特性的差异，通过周期性的压力变换过程来实现气体的分离或提纯。变压吸附技术于1958年应用于氢气的提纯，1962年实现工业规模的制氢。进入七十年代后，变压吸附技术获得了迅速的发展。     

变压吸附技术净化分离有机蒸气的研究进展

变压吸附(PSA)是近50年发展起来的一项用于气体净化、分离与提纯的新技术，它较低温精馏法、薄膜渗透法、化学吸收法等其他工业空分制氧方法具有自动化程度高、投资少、能耗低、安全等许多优点。工业上PSA技术最初应用于空气干燥、氢气纯化、     

变压吸附空气分离技术的开发与应用

介绍了变压吸附技术的基本原理及其开发与应用,并对今后变压吸吸附空气分离技术的发展方向提出了看法。     

变压吸附分离技术的研究进展

简述了变压吸附技术在分离净化方面的应用，及其在分离提纯高沸点组分中的研究进展，寻求进一步拓展变压吸附技术的应用领域，开发新型工业装置的途径     

变压吸附分离技术的研究进展

简述了变压吸附技术在分离净化方面的应用,及其在分离提纯高沸组分中的研究进展,寻求进一步拓展变压吸附技术的应用领域,开发新型工业装置的途径。     

变压吸附提纯CO装置技术改造研究

随着经济社会的进步发展,各行各业的科学技术水平都有大幅度提高。现阶段,在CO提纯领域当中,传统的低温法、电解法已经不适用,无论是在提纯效果,还是工作效率方面,都无法与变压吸附提纯技术相比。总体来说,变压吸附提纯技术效率高、性能好、成本低的特点使其应用范围逐渐扩大,适用性不断提高。主要分析讨论变压吸附提纯CO装置技术改造的相关内容,目的是优化变压吸附提纯CO装置技术的改造方案,实现技术升级。     

煤化工企业空分技术选择与工程设计

简要介绍了主要的空气分离工艺技术（空气低温分离工艺,变压吸附空气分离、膜分离技术）的流程与原理,最新发展及其主要特点。介绍了煤化工企业空分技术的选择及现代空分技术与工程设计的关系。     

Kinetic separation of carbon dioxide from hydrocarbons using carbon molecular sieve

Experimental results are reported on a pressure swing adsorption (PSA) process using carbon molecular sieve (CMS) for the separation of a gas mixture containing carbon dioxide, hydrocarbons (methane, ethane, propane, etc.) and nitrogen. This PSA process has direct applications in carbon dioxide removal or purification from landfill gas, natural gas processing plants and tertiary oil recovery effluent streams. The CMS-based PSA process separates the carbon dioxide in a single stage by using the differences in component diffusivities. This approach, therefore, provides a significant advantage compared to conventional equilibrium adsorption processes which require one separation stage for removing components such as ethane and propane that are more strongly adsorbed than carbon dioxide and another separation stage for removing components such as methane and nitrogen that are less strongly adsorbed than carbon dioxide. The CMS-based PSA process operates between a feed pressure of 20 to 40 bars and a regeneration pressure of 1.5 bars at ambient temperature and produces a 98+% carbon dioxide product. The PSA process can be integrated with a liquid carbon dioxide plant to produce food grade product.     

Air Fractionation by Adsorption

Abstract

Pressure swing adsorption (PSA) processes for air separation differ by the modes and conditions of operation of the adsorption, the desorption, and the complementary steps, as well as by the types of adsorbents used. Three commercial PSA processes for air separation are reviewed and compared. The first process uses a zeolitic adsorbent and produces only an oxygen-enriched product gas. The second process uses a carbon molecular sieve and produces only a nitrogen-enriched product gas. The third process uses a zeolite and simultaneously produces both oxygen-and nitrogen-enriched product gases. The performance and separation efficiency of the last process, called the ‘vacuum swing adsorption (VSA) process’, are reported to be superior to the others.     

变压吸附分离工业废气二氧化碳的研究进展

概述了未来人类对过量二氧化碳排放的处理办法,即碳的捕获和存储(CCS).简介了4种二氧化碳的分离工艺及特点和工业中二氧化碳的捕获系统.阐述了变压吸附工艺的基本原理和其在捕获工业废气中二氧化碳上的应用,以及变压吸附分离二氧化碳的工艺在循环结构设计、吸附剂材料和数值模拟等方面的研究进展和国内外的工业化应用.分析了目前该工艺仍存在的问题,指出该技术具有广阔的应用前景.     

Basics and industrial applications of pressure swing adsorption (PSA), the modern way to separate gas

Pressure swing adsorption (PSA) technology is increasingly applied for purification of gases and for bulk separation of most various gas mixtures. Typical product gases are hydrogen, carbon monoxide, ethylene, nitrogen, oxygen and methane. This paper presents an introduction to the technique of PSA plants and gives a survey of current practical applications of adsorption technology in modern process plant complexes.     

Predictive Dynamic Model of Air Separation by Pressure Swing Adsorption

A general dynamic model is developed for separation of air over a carbon molecular sieve and a zeolite adsorbent for production of nitrogen and oxygen. The proposed model is validated using experimental data from working laboratory scale N₂–PSA and laboratory scale O₂–PSA systems. Simulations studies are performed to investigate the effect of changing various process variables, such as the duration of PSA steps, bed length and feed inlet velocity.     

Air separation by pressure swing adsorption on a carbon molecular sieve

A simplified dynamic model for a PSA air separation process is developed based on linearized mass transfer rate expressions and binary Langmuir equilibrium. Constant pressure is assumed during adsorption and desorption steps but the variation in flow rate through the column due to adsorption is accounted for. The model predictions, using independently measured kinetic and equilibrium data are compared with experimental results obtained in a simple two-bed air separation PSA system packed with a carbon molecular sieve adsorbent. The model is shown to provide a good representation of the experimentally observed behaviour over a wide range of conditions.     

Modelling of a pressure swing adsorption process for oxygen enrichment with carbon molecular sieve

Adsorptive separation of oxygen from nitrogen and argon is carried out during the desorption steps of a pressure swing adsorption (PSA) process which uses carbon molecular sieves developed by Bergbau-Forschung GmbH. The adsorption isotherms of the three main components of air are very similar. On account of the pore size distribution of CMSN2, the diffusion coefficient of oxygen is more than eight times those of nitrogen and argon so that air separation occurs by adsorption kinetics. Experimental results for the individual steps and cyclic operation of the PSA process are presented and compared with the predictions of an isothermal plug-flow model. Adsorption rate is represented by a linear driving force equation. If the diffusion coefficients are adapted separately to every step, a good agreement is observed between the model calculations and experimental results.     

变压吸附(PSA)空分制氧技术进展

论述了 PSA法空分制氧分子筛的开发现状和制氧工艺的进展 ,为 PSA法空分制氧今后的发展提出了研究方向     

火炬气回收预分离流程的探讨

介绍了火炬气回收的状况、变压吸附技术、火炬气回收流程。提出火炬气回收工艺中增设变压吸附预分离单元,以回收火炬气中有价值的C2、C3组分。对流程的特点、可行性及经济性进行了分析,指出对于C2、C3体积分数大于5%的火炬气,可采用变压吸附预分离流程回收其有价值组分,将作燃料的火炬气转为作原料更节能、更环保。     

煤层气回收及CH4/N2分离PSA材料的研究进展

我国煤层气蕴藏丰富,在面临能源危机时代煤层气可作为天然气能源的有效补充。本文介绍了低浓煤层气回收即CH₄/N₂分离几种常见技术：低温技术、水合物技术、溶解技术、膜分离和变压吸附技术（PSA）的分离原理、技术开发和研究的现状,并分析了各项技术目前存在的问题。讨论了多孔材料,如活性炭、碳分子筛、沸石分子筛和新型金属有机骨架材料（MOFs）等对CH₄/N₂吸附分离效果的研究进展,由于MOFs材料的吸附性能随温度或压力的改变出现飞跃,预示了其在PSA领域广阔的应用前景。