羰基合成工业中分离提纯CO方法

羰基合成工业中使用的分离提纯CO方法主要有Cosorb法、膜分离法、深冷法和变压吸附法。分析了几种分离方法的特点,重点介绍变压吸附法在我公司的应用。     

羰基合成工业中分离提纯CO的方法

羰基合成工业中使用的分离提纯CO的方法主要有:Cosorb法情况、膜分离法、深冷法和变压吸附法。本文分析了几种分离方法的特点,重点介绍变压吸附法在充矿国泰人工有限公司的应用情况。     

一氧化碳分离技术

目前从混合气体中提纯CO的技术有深冷法、COSORB法和变压吸附法。介绍了以上几种方法的技术进展,其中重点介绍了以PU-1为吸附剂的变压吸附法的应用效果。     

脱除CO2技术综述

本文回顾烟气脱除CO2的各种技术。首先讨论溶剂法脱除气体中的CO2，重点是胺法系统，探讨作为溶剂的胺液特点和优缺点，其次讨论分离法，如膜分离、变压吸附和深冷技术，再次讨论富氧的利用，最后总结其他方法并将各种脱碳方法加以比较。     

硫化氮气制备与管理

轮胎行业硫化方式多为过热水硫化,随着轮胎工艺不断改进和提高,出现了氮气硫化,氮气的化学性质不活泼,在平常的状态下表现为很大的惰性,不易与其他物质发生化学反应,保障了轮胎硫化的品质,提高了胶囊使用寿命.     

变压吸附提纯工业尾气中CO

为了寻求一种高效、经济的分离提纯方法来回收利用工业尾气中的CO,文中开发和研究变压吸附提纯工业尾气中CO技术,并考察了一些参数的影响。结果表明:PU-1吸附剂所需的传质区长度较短,这一动态特性对工业应用是非常有利的;随着吸附压力的升高,吸附时间变化不大,而增大原料气流量致使吸附时间缩短;当均压次数为5次时,产品气CO体积分数可保持在97%以上,可省去置换步骤;实验最佳温度操作范围是318—358 K;原料气CO体积分数在20%—40%变化时,产品气CO体积分数基本保持在95%以上。研究结果为后续的中试和工业化设计提供了可靠的数据。     

CO2分离方法的研究进展

CO_2作为温室效应的主要气体,近些年来一直备受关注。综述了CO_2脱除的方法,主要有吸收法(主要包括物理吸收法、化学吸收法和混合溶剂吸收法)、膜分离法、低温蒸馏法和变压吸附分离法;详细介绍了变压吸附分离法,因其能耗低、易操作、污染小等优点,在CO_2分离过程中发挥着越来越重要的作用,并对未来CO_2的吸附分离进行了展望。     

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.     

膜装置纯化CO气体

沧州大化TDI有限责任公司(TDI公司)PSA-CO装置的产品气CO中H2含量超标,使用普里森气体膜装置有效降低了CO中的H2含量,保证了后续系统的安全稳定运行。     

介绍一种新的制氮方法——变压吸附制氮

本文介绍了可以代替深冷法的新的制氮方法—变压吸附法,该法适合于70t/d以下规模。该法启动快,可根据需要随意开停车。产品氮气的纯度可达99.5％以上。     

两段法变压吸附制备高纯度CO系统改造总结

介绍了两段法变压吸附制备高纯度CO系统存在的问题并进行原因分析,提出增设焦炭过滤器、优化前工序、对设备和管道进行改造及修改时序、优化调整操作参数等改造措施。改造后,系统运行稳定,开工率达到98％以上。     

两段法变压吸附脱碳装置应用总结

介绍了两段法变压吸附（PSA）脱碳装置生产应用情况。经过近5年的长期运行,证明两段法变压吸附脱碳装置具有操作稳定、生产成本低的特点,完全满足了尿素生产的需要。     

两段法变压吸附技术在脱碳装置中的应用

阐述了新型无动力冲洗两段法变压吸附技术在脱碳装置中的应用情况。实践证明,该技术具有有效气体回收率高、工艺流程简单、操作安全方便、自动化程度高、操作环境干净整洁、维修工作量小、运行费用省、能耗低、无废液和废渣排放等特点,是一项值得全面推广采用的成熟工艺。     

OMRON中型PLC在提纯CO_2装置中的应用

利用日本ＯＭＲＯＮ公司中型ＰＬＣ的功能,通过编程和组态,实现了Ｃ２００ＨＥ控制系统在变压吸附法提纯ＣＯ２装置中的应用     

Equilibrium Analysis of Cyclic Adsorption Processes: CO2 Working Capacities with NaY

Abstract

The most common application of adsorption is via pressure swing adsorption. In this type of design, the feed and regeneration temperatures are kept approximately equal, whereas the feed pressure is higher than the regeneration pressure. By exploiting the difference in the amount adsorbed at a higher pressure to the amount adsorbed at a lower pressure, a working capacity is realized. Therefore, by examining the expected (ideal) working capacity of an adsorbent, a performance characteristic can be analyzed for a pressure swing adsorption process (PSA). For this work, feed pressures up to 2.0 atm CO₂ and feed temperatures from 20°C to 200°C were investigated. These limits were chosen due to the nature of the target process: CO₂ removal from flue gas.

Carbon dioxide adsorption isotherms were determined in a constant volume system at 23°C, 45°C, 65°C, 104°C, 146°C, and 198°C, for pressures between 0.001 and 2.5 atm CO₂ with NaY zeolite. These data were fit with the temperature dependent form of the Toth isotherm. Henry's Law constants and the heat of adsorption at the limit of zero coverage were also determined using the concentration pulse method. Comparison of the Henry's Law constants derived from the Toth isotherm, and those obtained with the concentration pulse method provided excellent agreement.

By using the Toth isotherm, expected working capacity contour plots were constructed for PSA (Pressure Swing Adsorption), TSA (Temperature Swing Adsorption), and PTSA (Pressure Temperature Swing Adsorption) cycles. The largest expected working capacities were obtained when the bed was operated under a high‐pressure gradient PSA cycle, or a high thermal and pressure gradient PTSA cycle. The results also showed that certain TSA and PSA cycle conditions would result with higher expected working capacities as the feed temperature increases.     

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。     

Application of high‐pressure swing adsorption process for improvement of CO2 recovery system from flue gas

Although the super cold separator applied to the system for CO₂ recovery from flue gas can produce pure CO₂ liquid, the CO₂ recovery efficiency is low. Therefore, the addition of a PSA plant was considered for the secondary CO₂ recovery from the noncon‐densing gas to improve the efficiency. The PSA plant was operated for adsorption at the same pressure as that of the super cold separator and for desorption at the atmospheric pressure. From both the simulation and the experimental data, it was confirmed that CO₂ could be concentrated from 50% in the noncondensing gas to 70% in the recovery gas by the PSA plant and the CO₂ recovery efficiency of the plant was about 90%.     

复合床层变压吸附法脱除合成气中微量CO和CO_2

采用分别装载活性炭和NA型吸附剂的复合床层的变压吸附工艺来脱除合成气中微量的CO和CO2,并利用Aspen-Adsim软件对其进行模拟和优化。模拟结果表明,吹扫气量对工艺性能有较大的影响,吹扫气由处在顺放步骤的吸附塔提供,因此在顺放步骤将床层压力降至较低压力,可获得较大的吹扫气量,此时的工艺性能也较优。模拟结果还表明,均压次数对工艺性能也有影响。在相同的顺放压降下,将变压吸附过程中的3次均压变为2次均压,可减少吸附剂用量,吸附剂产率更高,但塔底尾气量要相应增加。