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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。 相似文献
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《全国煤气化技术通讯》2001,9(1):U017-U019
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。 相似文献
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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。 相似文献
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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 相似文献
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变压吸附分离技术的研究进展 总被引:7,自引:0,他引:7
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。 相似文献
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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。 相似文献
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《Gas Separation & Purification》1993,7(4):259-263
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. 相似文献
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《分离科学与技术》2012,47(14-15):2379-2396
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. 相似文献
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《Gas Separation & Purification》1988,2(3):115-119
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. 相似文献
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J. Sadeghzadeh Ahari S. Pakseresht M. Mahdyarfar S. Shokri Y. Zamani A. Nakhaei pour F. Naderi 《化学工程与技术》2006,29(1):50-58
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. 相似文献
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《Chemical engineering science》1986,41(5):1333-1343
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. 相似文献
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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. 相似文献
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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。 相似文献
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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。 相似文献