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     

基于铜基载氧体的化学链空分制氧系统的研究

基于铜基载氧体，运用流程模拟软件Aspen plus对化学链空分制氧系统展开了研究，构建化学链制氧系统模型，分析了反应温度，载气流量等因素对系统性能的影响，对化学链空分制氧系统进行参数优化。此外，本文也构建了传统的深冷空分制氧系统，与化学链制氧系统进行了对比分析。结果表明：较高的释氧反应器温度可提高氧气浓度和氧气的摩尔流量；水蒸气流量的增加也有利于释氧反应的进行。与深冷空分制氧技术相比，化学链空分制氧技术不仅系统能耗较低，而且制备的氧气浓度也较高。     

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。     

浅谈变压吸附制氧技术的主要特点

介绍了变压吸附制氧技术的发展概况;阐述了变压吸附制氧技术的工作原理及流程;介绍了该技术与传统深冷空分制氧的优点。     

真空变压吸附空分制氧等温与非等温过程模拟比较

应用动态柱穿透法测定的空气中氮-氧吸附平衡数据模拟两床真空变压吸附(VSA)空分制氧中等温与非等温过程;在VSA过程模拟中探讨了吸附压力、进料流量和冲洗比等过程操作条件以及吸附过程中温度的变化对产品气氧的纯度、收率和产率的影响,为VSA空分制氧过程提供一定的设计依据。     

初探浮法玻璃工厂全氧燃烧熔窑制氧装备的选择

通过对VPSA和深冷空分制氧的原理和特点的描述，阐述小规模全氧玻璃窑制氧装备的选择。     

深冷空分装置氩系统设置研究

分析了深冷空分装置制氩的工艺原理及适用场合,从对氧提取的影响、装置能耗、工业应用可行性角度分析了深冷空分装置对氩组分的处理原则。     

制氧机空分用XB型13X分子筛

XB型13X空分专用分子筛是由上海分子筛厂和上海化工研究院联合研制的,主要应用于制氧和空分吸附净化工艺。它比以往传统的深冷空分工艺具有能耗少、操作简便等优点。     

大唐阜新48000m~3/h空分流程的技改方案

主要结合大唐国际阜新煤制天然气公司气化炉生产用氧情况与开封制氧集团设计的空分流程,进行技术改进、流程优化。更可靠保证气化炉的稳定用氧,保证公司生产的稳定性并节省可观的设备投资。     

常压式固定床增氧制气项目改造总结

为充分利用空分装置来的富余高压纯氧,心连心公司对常压间歇式固定床制气工艺进行了增氧制气改造。简述了固定床增氧制气的工艺流程和增氧制气的投运原则,介绍了增氧制气项目的工艺安全联锁及施工过程中的安全控制,对比了增氧制气项目投运前后的生产数据。经过改造,单炉产氨量有所提升,煤耗、电耗均有所降低,气体成分也有不同程度的改善。     

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.     

高原环境下制供氧技术研究进展

氧气不仅对人体代谢活动有重要作用,而且在工业生产、水产养殖、载人航天等方面应用广泛.在高原环境中大气压降低,氧气也变得稀薄,因此氧气的制备和供给就显得尤为重要.主要介绍了在高原环境下的四种制氧技术:深冷法、膜分离法、化学试剂法和变压吸附法,其中变压吸附制氧方法所需要的设备较少、工艺简单,能耗低,所得氧气浓度较高,因此更适合在高原应用.随着相关科技领域的发展,变压吸附制氧工艺和吸附剂性能的不断提高,未来变压吸附制氧工艺在高原地区会有更加广泛的应用前景.     

变压吸附技术在气体分离提纯中的应用

介绍了变压吸附技术的基本原理、发展概况及基本工作过程,并阐述了该技术在氢气的分离与提纯、二氧化碳的分离与提纯、一氧化碳的分离、空气分离制氧、空气分离制氮、碳的脱除等工业过程中的应用,对变压吸附技术今后的发展提出了展望。     

Simulation and experiment of six-bed PSA process for air separation with rotating distribution valve

In this work, a six-bed pressure swing adsorption (PSA) process was investigated to produce medical oxygen from air, which uses the combination of six-way rotating distribution valve and PSA and has the main advantage of effectively saving space compared to the traditional two-bed or four-bed PSA process and can obtain greater productivity. The mathematical model of adsorption beds was developed based on the separation mechanism and the interaction among different equipment. Moreover, a pilot-scale device has been constructed to verify the accuracy of mathematical model by experiment. The oxygen product conformed to the medical standard (>93% (vol)) with a recovery of over 57%. Some related parameters were also discussed in detail, such as step time, ratio of length to the diameter, flow rate of product.     

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.     

空分富氧沸石分子筛吸附剂的研究

介绍了国内外目前以PSA技术进行空气分离制备氧气所用沸石分子筛吸附剂的研究状况。从研究结果来看，N2吸附容量和N2／O2分离选择性的提高主要通过对沸石分子筛4A和13X进行离子交换，以对其表面进行改性，从而调整对N2、O2的吸附性能。另外，沸石分子筛制备过程中的硅铝比和成型条件等对N2和O2的吸附也有一定的影响。     

Production of argon free oxygen by adsorptive air separation on Ag‐ETS‐10

The purification of different components of air, such as oxygen, nitrogen, and argon, is an important industrial process. Pressure swing adsorption (PSA) is surpassing the traditional cryogenic distillation for many air separation applications, because of its lower energy consumption. Unfortunately, the oxygen product purity in an industrial PSA process is typically limited to 95% due to the presence of argon which always shows the same adsorption equilibrium properties as oxygen on most molecular sieves. Recent work investigating the adsorption of nitrogen, oxygen and argon on the surface of silver‐exchanged Engelhard Titanosilicate‐10 (ETS‐10), indicates that this molecular sieve is promising as an adsorbent capable of producing high‐purity oxygen. High‐purity oxygen (99.7+%) was generated using a bed of Ag‐ETS‐10 granules to separate air (78% N₂, 21% O₂, 1% Ar) at 25°C and 100 kPa, with an O₂ recovery rate greater than 30%. © 2012 American Institute of Chemical Engineers AIChE J, 59: 982–987, 2013     

Oxygen Production by Pressure Swing Adsorption

Abstract

The specific oxygen production capacity and the oxygen recovery of a pressure swing adsorption (PSA) process for the production of oxygen from ambient air by selective adsorption of nitrogen can be increased by operating the process at a superambient temperature. The higher temperature operation provides more efficient desorption of nitrogen from the adsorbent which more than off-sets the detrimental effects of the lower selectivity and capacity of adsorption of nitrogen from air at the elevated temperature. The concept is demonstrated by evaluating the performance of an eight-step PSA-oxygen process to produce a 90% oxygen product stream at different temperatures. It is shown that 10% higher oxygen production capacity and 14.5% larger oxygen recovery can be obtained by operating the PSA process at 60°C compared to its performance at 30°C. The PSA process and its performance data from a pilot plant are discussed.     

我国变压吸附制氧吸附剂及工艺研究进展

新型吸附剂和变压吸附工艺开发是提高变压吸附装置性能的主要途径。本文综述了我国变压吸附制氧吸附剂改性及变压吸附制氧工艺研究进展,并指出目前存在问题:LiLSX型及Li⁺和其他离子的混合型吸附剂具有良好氧氮分离性能,但仍存在离子交换利用率低、成本高等问题;其他离子改性的吸附剂制备过程相对简单,但也有分离系数低或成本高等缺点;基于循环步骤改进的变压吸附制氧工艺优化研究大多以实验室规模制氧装置为主,未深入研究优化工艺的过程性能,难以有效地指导工业级制氧装置工艺优化;快速和双回流变压吸附制氧新工艺具有广阔发展前景,但相关研究欠深入;而多级和耦合变压吸附制氧工艺具有广阔应用前景,但存在流程复杂、能耗较高等缺点。指出未来制氧吸附剂和制氧工艺研究应进一步研究固相离子交换方法,提高LSX吸附剂Li⁺交换利用率,降低成本;开展优化工艺的过程性能研究,指导工业级制氧装置优化;加强快速变压吸附和双回流变压吸附制氧工艺研究,推动工程化应用。