工业尾气变压吸附提纯一氧化碳中试

Using pressure swing adsorption （PSA） technology to purify carbon monoxide （CO） discharged from industrial gases is a high-efficiency and economical method. In this article, a four-bed PSA experiment for CO purification was improved and optimized, in which a set of 120 m^3·h^-1 pilot-scale PSA device was developed to purify CO from industrial tail gases, a set of control systems suitable for industry production was developed, and the influences of the operating parameters on CO purification were investigated. The experimental results indicated that the pilot-scale PSA device could produce qualified product gas and get high CO recovery ratio under optimized conditions. The research may provide reliable fundamental data, for industrial scale utilization of CO, from industrial tail gases, and have strong market competitive power and a broad promoted application prospect.     

变压吸附新技术回收甲醇尾气中的有效气体

介绍了变压吸附(PSA)的基本原理及特点,采用特殊的吸附剂及先进的工艺过程可以从甲醇尾气中脱除N2和Ar等惰性气体,从而回收其中的有效组分H2和CO、CH4、CO2。并介绍了该PSA工艺在以天然气为原料生产甲醇中的应用,对PSA与膜分离两种技术在甲醇尾气分离回收中的技术及经济性等方面进行了对比,该PSA新技术分离效率高,经济效益显著。     

变压吸附技术净化分离有机蒸气的研究进展

从变压吸附分离回收低沸点和中高沸点有机蒸气、变压吸附用吸附剂以及变压吸附分离回收有机蒸气工艺及其过程的计算机模拟等方面,评述了变压吸附技术在净化分离有机蒸气方面的研究进展。指出今后的研究方向为:新型变压吸附用吸附剂;多种分离过程的集成技术;过程优化设计;智能型控制系统;多成分有机气体的变压吸附分离;利用计算机进行变压吸附过程模拟的基础研究;吸附和脱附的传质、传热基础理论等。     

Separation of Binary Gas Mixture into Two High-Purity Products by a New Pressure Swing Adsorption Cycle

Abstract

Binary mixtures can be separated into two high-purity products by a new pressure swing adsorption (PSA) cycle. The product purity depends on the purge/feed ratio of the respective gases in the PSA cycle. The process characteristics of the new PSA cycle, using activated carbon as the sorbent, can be adequately predicted by an equilibrium model.     

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.     

制氢驰放气优化利用方案的研究

制氢装置PSA单元产生的驰放气中含有高浓度的甲烷、氢气、一氧化碳、二氧化碳。比较了变压吸附法、溶剂吸收法和膜分离法分离驰放气中的二氧化碳,从净化气指标、总能耗、运行费用和装置投资方面进行比较,得出变压吸附法分离优于其它两种方案。另外,变压吸附法分离没有涉及化学过程,相比操作运行更简单方便,可实现在线切换吸附器,有利于装置长周期运行。     

变压吸附法回收环氧乙烷生产排放气中的乙烯

针对环氧乙烷生产装置中含乙烯尾气排放造成乙烯资源浪费的问题,提出采用变压吸附回收尾气中乙烯的方法。实验中测定了排放气中各种气体组分在普通活性炭和自制载铜吸附剂(NJ)上的吸附平衡;分别考察了气体组分C2H6、CO2、Ar、CH4、O2对NJ变压吸附混合气中乙烯的影响。实验中还测定了NJ用于工厂实际排放气体中变压吸附乙烯的性能,并初步考察了解吸性能。实验结果表明,除氧气有一定影响外,NJ吸附剂具有稳定的变压吸附特性,能达到环氧乙烷排放气中乙烯回收要求,具有广泛的工业应用前景。     

变压吸附法回收高炉气中CO的研究

采用载铜吸附剂进行了变压吸附回收高炉气中CO的工业侧线试验 ,考察了载铜吸附剂与 5A分子筛分别用于回收高炉气中CO时的产品纯度和CO的回收率 ,试验结果表明 ,载铜吸附剂对高浓度N2 中的CO有很好的选择性 ,其性能优于 5A分子筛。从技术经济角度分析了两步变压吸附法应用于高炉气中CO回收的可行性、环境效应和经济效益。     

变压吸附分离技术及其在粉末冶金行业的应用

简单介绍了变压吸附气体分离技术的工艺特点，技术进展和在我国的应用情况，对变压吸附各种不同的工艺在粉末冶金生产过程中的应用进行了展望，预计该技术在粉末冶金行业将会得到迅速推广，为生产厂家带来良好的经济效益，促进粉末冶金技术的进步。     

变压吸附分离CO技术及其在羰基合成工业中的应用

简述了不同吸附分离CO技术的特点,介绍了变压吸附分离CO技术的原理和工艺现状以及羰基合成工业中分离CO技术的选择.     

变压吸附分离提纯CO_2技术的应用

本文叙述了变压吸附提纯ＣＯ２技术的基本原理和工艺过程，介绍了我国ＰＳＡ－ＣＯ２的开发过程及发展前景，对已开发的ＰＳＡ－ＣＯ２工业装置的生产成本和经济性进行了分析     

变压吸附制氮技术的发展和应用

综述了变压吸附技术的原理、发展及碳分子筛和沸石分子筛两种吸附剂变压吸附技术制氮的国内外研究进展,提出了变压吸附技术制氮的发展方向。     

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。     

变压吸附技术在氢回收中的应用

介绍了变压吸附(PSA)技术在回收电石法聚氯乙烯生产过程的精馏尾气中氢气的原理及应用,阐述了变压吸附技术的工艺流程及其分离原理,分析了采用此技术后的环境和经济效益。     

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.     

Carbon molecular sieves for gas separation processes

The development and commercialization of carbon molecular sieves (CMS) are closely connected with the development of pressure swing adsorption (PSA) processes for the separation of gases. It was already known in the 1960s that certain carbonaceous materials have a molecular sieving effect similar to that of the well known zeolitic molecular sieves. The effect was observed during basic research on anthracite and bituminous coal which are both known to be porous. However, the separation effect, e.g. for oxygen/nitrogen, was very small. It was not until the 1970s that large-scale production of uniform quality CMS suitable for commercial application in PSA processes was established. Nowadays, different types of CMS are successfully used in PSA plants, e.g. for the generation of nitrogen from air, for the production of methane from biogases, and for the recovery of hydrogen from coke oven and steam reforming gases^1–4.     

Modelling and simulation of two-bed PSA process for separating H_2 from methane steam reforming

Methane steam reforming is the main hydrogen production method in the industry. The product of methane steam reforming contains H_2, CH_4, CO and CO_2 and is then purified by pressure swing adsorption(PSA) technology. In this study, a layered two-bed PSA process was designed theoretically to purify H_2 from methane steam reforming off gas. The effects of adsorption pressure, adsorption time and purgeto-feed ratio(P/F ratio) on process performance were investigated to design a PSA process with more than99.95% purity and 80% recovery. Since the feed composition of the PSA process changes with the upstream process, the effect of the feed composition on the process performance was discussed as well.The result showed that the increase of CH_4 concentration, which was the weakest adsorbate, would have a negative impact on product purity.     

新型PSA脱碳装置的应用

着重介绍了变压吸附法（PSA）用于脱除合成氨变换气中二氧化碳技术的最新进展及其应用。     

Recent trends in pressure swing adsorption: Production of multiple products from a multicomponent feed gas

Recent pressure swing adsorption (PSA) processes are designed to produce multiple product gases of high purity and recovery from binary or multicomponent feed gases. Processes are also designed to alter the composition of a feed gas mixture. One example of these new processes is described and its performance reported. The commercial adsorbents used in these processes come from a large family of generic adsorbents like zeolites, activated carbons, silica and alumina gels, etc. Most of these adsorbents are energetically very heterogeneous. This makes a priori design of these processes extremely difficult and experimental process performance data are needed. Several fundamental problems on this subject are discussed.     

PSA制氮技术及其在交联电缆生产线中的应用

介绍ＰＳＡ制氮技术及其交联电缆生产线中的应用。利用氧和氮在碳分子筛细孔扩散系数的差异,以变压吸附的方法由空气中制氮,经检测表明,氮气符合ＧＢ３８６４工业用氮的技术要求,用于交联电缆生产中的加热介质,可提高交联电缆产品质量,投资省,自动化程度高