发布求助
文献互助 智能选刊 最新文献

Gas Separation & Purification最新文献

筛选
英文 中文
Linear driving force approximation for isothermal non-isobaric diffusion/convection with binary Langmuir adsorption 二元Langmuir吸附等温非等压扩散/对流的线性驱动力近似
Gas Separation & Purification Pub Date : 1995-12-01 DOI: 10.1016/0950-4214(95)00008-Y
A.M.M. Mendes, C.A.V. Costa, A.E. Rodrigues
{"title":"Linear driving force approximation for isothermal non-isobaric diffusion/convection with binary Langmuir adsorption","authors":"A.M.M. Mendes,&nbsp;C.A.V. Costa,&nbsp;A.E. Rodrigues","doi":"10.1016/0950-4214(95)00008-Y","DOIUrl":"10.1016/0950-4214(95)00008-Y","url":null,"abstract":"<div><p>This paper presents several reduced models for the intraparticle diffusion/convection mechanisms in spherical homoporous particles under isothermal conditions. These semi-empirical linear driving force approximations were developed for the cyclic steady state that is attained when a cyclic concentration and/or total pressure perturbation is imposed at the particle surface. The models are applicable to linear systems or those obeying bicomponent Langmuir isotherms. The linear driving force approximations have two or three parameters for each component and are presented for the following cases: Knudsen diffusion, molecular diffusion, molecular plus Knudsen diffusion in series, viscous flow, and also for both diffusion mechanisms in series, in parallel with the convective flow, as in the dusty gas model. Comparison between the results obtained with these approximations and with the complete models shows that on average the relative quadratic error is ≈10% for non-smooth and 5% for smoother perturbations.</p></div>","PeriodicalId":12586,"journal":{"name":"Gas Separation & Purification","volume":"9 4","pages":"Pages 259-270"},"PeriodicalIF":0.0,"publicationDate":"1995-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0950-4214(95)00008-Y","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87637516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 21
Separation of methane—nitrogen mixtures by pressure swing adsorption using a carbon molecular sieve 碳分子筛变压吸附分离甲烷-氮混合物
Gas Separation & Purification Pub Date : 1995-09-01 DOI: 10.1016/0950-4214(95)98227-C
A.I. Fatehi, K.F. Loughlin, M.M. Hassan
{"title":"Separation of methane—nitrogen mixtures by pressure swing adsorption using a carbon molecular sieve","authors":"A.I. Fatehi,&nbsp;K.F. Loughlin,&nbsp;M.M. Hassan","doi":"10.1016/0950-4214(95)98227-C","DOIUrl":"10.1016/0950-4214(95)98227-C","url":null,"abstract":"<div><p>A 60%-40% and a 92%-8% methane nitrogen mixture were separated in a two-bed pressure swing adsorption (PSA) unit using a carbon molecular sieve (CMS) adsorbent. The CMS adsorbent used in this separation is a dual resistance type comprising a barrier resistance on the crystal surface and diffusion resistance in the crystal interior. This dual resistance is modelled using the linear driving force (LDF) PSA model. The parameter Ω of the LDF model, which relates the theoretical and experimental results, was found to be significantly different from that for conventional diffusion-controlled processes. This difference is attributed to the presence of a barrier resistance in the CMS.</p></div>","PeriodicalId":12586,"journal":{"name":"Gas Separation & Purification","volume":"9 3","pages":"Pages 199-204"},"PeriodicalIF":0.0,"publicationDate":"1995-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0950-4214(95)98227-C","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73678687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 76
Evaluation of pressure profiles and overall pressure drop for flow through annular packed bed configurations 评估通过环空填料床结构的压力分布和总压降
Gas Separation & Purification Pub Date : 1995-09-01 DOI: 10.1016/0950-4214(95)98224-9
Peter J. Heggs , David I. Ellis , Mohammed S. Ismail
{"title":"Evaluation of pressure profiles and overall pressure drop for flow through annular packed bed configurations","authors":"Peter J. Heggs ,&nbsp;David I. Ellis ,&nbsp;Mohammed S. Ismail","doi":"10.1016/0950-4214(95)98224-9","DOIUrl":"10.1016/0950-4214(95)98224-9","url":null,"abstract":"<div><p>A recently published model for the prediction of flow distributions in annular packed bed systems has been extended to provide pressure maps throughout the system and overall pressure drop. For a particular fixed filter design, the analysis shows that the best flow distribution (0.58% average deviation from uniform flow) and least overall pressure drop (7% less than the maximum) is obtained from a U-type flow arrangement with inward radial flow across the annular bed. A sensitivity analysis has revealed that the lowest overall pressure drop is obtained when flow maldistribution is minimal.</p></div>","PeriodicalId":12586,"journal":{"name":"Gas Separation & Purification","volume":"9 3","pages":"Pages 171-180"},"PeriodicalIF":0.0,"publicationDate":"1995-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0950-4214(95)98224-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91538356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Gas separation by silicone-coated dry asymmetric aromatic polyamide membranes 有机硅涂层非对称芳香聚酰胺干膜气体分离
Gas Separation & Purification Pub Date : 1995-09-01 DOI: 10.1016/0950-4214(95)98225-A
A. Tabe Mohammadi , T. Matsuura, S. Sourirajan
{"title":"Gas separation by silicone-coated dry asymmetric aromatic polyamide membranes","authors":"A. Tabe Mohammadi ,&nbsp;T. Matsuura,&nbsp;S. Sourirajan","doi":"10.1016/0950-4214(95)98225-A","DOIUrl":"10.1016/0950-4214(95)98225-A","url":null,"abstract":"<div><p>A study was made on the permeation rate of pure gases including helium, hydrogen, oxygen, nitrogen, carbon dioxide and methane, and the separation of CO<sub>2</sub>/CH<sub>4</sub> gas mixtures by a silicone-coated aromatic polyamide membrane. The ideal and actual separation factors of the polymer towards these gases were calculated. The membranes were prepared by the phase-inversion technique and coated with silicone rubber after drying. While the permeation rates of He, H<sub>2</sub> and CO<sub>2</sub> were not affected significantly by coating, the permeation rates of N<sub>2</sub> and CH<sub>4</sub> gases decreased to below the detectable limit of the flow meter. The permeation rate of O<sub>2</sub> decreased after coating. The actual separation factor for mixtures of CO<sub>2</sub>/CH<sub>4</sub> varied from 64 to 166, one of the highest separation factors reported in the literature.</p></div>","PeriodicalId":12586,"journal":{"name":"Gas Separation & Purification","volume":"9 3","pages":"Pages 181-187"},"PeriodicalIF":0.0,"publicationDate":"1995-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0950-4214(95)98225-A","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81062421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 14
Gravimetric measurement of binary gas adsorption equilibria of methane—carbon dioxide mixtures on activated carbon 甲烷-二氧化碳混合物在活性炭上二元气体吸附平衡的重量测定
Gas Separation & Purification Pub Date : 1995-09-01 DOI: 10.1016/0950-4214(95)98226-B
E. Buss
{"title":"Gravimetric measurement of binary gas adsorption equilibria of methane—carbon dioxide mixtures on activated carbon","authors":"E. Buss","doi":"10.1016/0950-4214(95)98226-B","DOIUrl":"10.1016/0950-4214(95)98226-B","url":null,"abstract":"<div><p>Adsorption isotherms for the pure gases methane and carbon dioxide and their binary mixtures at constant gas composition have been determined in a high pressure microbalance at 20, 40 and 60°C and equilibrium pressures up to 1.7 MPa on activated carbon. The gravimetric method proposed by Van Ness has been used to obtain the composition of the adsorbed phase for the binary mixtures at 100 and 530 kPa. The ideal adsorbed solution (IAS) theory has been applied to predict the binary adsorption equilibria from the single-component isotherms. The predictions of the IAS theory are only in moderate agreement with experimental data. The activity coefficients calculated for both components in the adsorbed phase are analogous to the respective vapour-liquid equilibria positive deviations from Raoult's law. Finally, the real adsorbed solution (RAS) theory has been used to fit the experimental data.</p></div>","PeriodicalId":12586,"journal":{"name":"Gas Separation & Purification","volume":"9 3","pages":"Pages 189-197"},"PeriodicalIF":0.0,"publicationDate":"1995-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0950-4214(95)98226-B","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89861065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 58
Design studies of membrane permeator processes for gas separation 气体分离膜渗透工艺设计研究
Gas Separation & Purification Pub Date : 1995-09-01 DOI: 10.1016/0950-4214(95)98223-8
T. Pettersen, K.M. Lien
{"title":"Design studies of membrane permeator processes for gas separation","authors":"T. Pettersen,&nbsp;K.M. Lien","doi":"10.1016/0950-4214(95)98223-8","DOIUrl":"10.1016/0950-4214(95)98223-8","url":null,"abstract":"<div><p>The intrinsic behaviour of several single-stage and multi-stage permeator systems has been studied using a recently developed algebraic design model. Upper and lower bounds with respect to product purity and recovery in single-stage systems are presented. It is shown that single-stage permeators without recycle can exhibit maxima in permeate purity as a function of the pressure ratio across the membrane. It is illustrated why bypass configurations may be economically profitable in single-stage systems. The effect of product recycle in single-stage systems has been studied. It is shown that permeate recycle can reduce the compressor load in single-stage permeator systems. Similar benefits of retentate recycle have not been identified. The characteristic behaviour of multi-stage systems has been studied. Based on general design criteria, various module configurations have been classified as suitable for recovery of either the slowest or the fastest permeating component. The effect of using different membrane materials at each stage of a multi-stage permeator cascade has been studied. It is shown that improvements with respect to product recovery can be achieved.</p></div>","PeriodicalId":12586,"journal":{"name":"Gas Separation & Purification","volume":"9 3","pages":"Pages 151-169"},"PeriodicalIF":0.0,"publicationDate":"1995-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0950-4214(95)98223-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76754677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 24
Sorption and diffusion of oxygen and nitrogen in molecular sieve RS-10 RS-10分子筛中氧、氮的吸附与扩散
Gas Separation & Purification Pub Date : 1995-09-01 DOI: 10.1016/0950-4214(95)98228-D
S. Farooq
{"title":"Sorption and diffusion of oxygen and nitrogen in molecular sieve RS-10","authors":"S. Farooq","doi":"10.1016/0950-4214(95)98228-D","DOIUrl":"10.1016/0950-4214(95)98228-D","url":null,"abstract":"<div><p>Henry's law constants and intracrystalline diffusivities of oxygen and nitrogen in molecular sieve RS-10 have been measured by the pulse chromatographic method. Both moment analysis and time domain fitting of the experimental response curves give consistent results. Heats of adsorption and activation energies have been determined from the equilibrium and kinetic measurements carried out at different temperatures.</p></div>","PeriodicalId":12586,"journal":{"name":"Gas Separation & Purification","volume":"9 3","pages":"Pages 205-212"},"PeriodicalIF":0.0,"publicationDate":"1995-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0950-4214(95)98228-D","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73834914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 19
Breakthrough study of the adsorption and separation of sulfur dioxide from wet gas using hydrophobic zeolites 疏水沸石吸附分离湿气中二氧化硫的突破性研究
Gas Separation & Purification Pub Date : 1995-09-01 DOI: 10.1016/0950-4214(95)98229-E
J. Tantet, M. Eić, R. Desai
{"title":"Breakthrough study of the adsorption and separation of sulfur dioxide from wet gas using hydrophobic zeolites","authors":"J. Tantet,&nbsp;M. Eić,&nbsp;R. Desai","doi":"10.1016/0950-4214(95)98229-E","DOIUrl":"10.1016/0950-4214(95)98229-E","url":null,"abstract":"<div><p>The adsorptive and kinetic behaviour patterns of SO<sub>2</sub> and water vapour on mordenites and pentasil zeolites were investigated using the breakthrough curve method. For all the zeolites studied, the breakthrough experimental data show a decrease in the equilibrium capacities for both SO<sub>2</sub> and H<sub>2</sub>O with increasing SiO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> ratio. At the lower ratios SO<sub>2</sub> adsorption is believed to be influenced by the basicity of the zeolite. The presence of water in the gas reduces its SO<sub>2</sub> capacity to varying degrees, depending on the SiO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> ratio. In contrast, the presence of CO<sub>2</sub> (in the wet SO<sub>2</sub>-containing gas) has very little effect. The hydrophobic indices, which were used to interpret the selectivity of SO<sub>2</sub> adsorption, showed different trends with SiO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> ratios. The Langmuir-Freundlich and extended Langmuir-Freundlich equilibrium models were used to predict equilibrium properties for the single-component and binary systems, respectively. The linear driving force-based non-isothermal model was used to fit experimental breakthrough curves for the single-component systems. Overall mass transfer resistances derived from the model were compared with the values obtained for SO<sub>2</sub> and water vapour adsorption in pelleted samples using a simplified biporous adsorbent model. Breakthrough curves for the binary systems were calculated using kinetic and equilibrium data of the single-component systems.</p></div>","PeriodicalId":12586,"journal":{"name":"Gas Separation & Purification","volume":"9 3","pages":"Pages 213-220"},"PeriodicalIF":0.0,"publicationDate":"1995-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0950-4214(95)98229-E","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88580791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 32
Removal of CO2 from a breathing gas mixture using a hollow-fibre permeator with permeate purge and absorption 使用具有渗透吹扫和吸收的中空纤维渗透器从呼吸气体混合物中去除二氧化碳
Gas Separation & Purification Pub Date : 1995-06-01 DOI: 10.1016/0950-4214(95)93946-H
K. Li, Y. Chen, W.K. Teo
{"title":"Removal of CO2 from a breathing gas mixture using a hollow-fibre permeator with permeate purge and absorption","authors":"K. Li,&nbsp;Y. Chen,&nbsp;W.K. Teo","doi":"10.1016/0950-4214(95)93946-H","DOIUrl":"10.1016/0950-4214(95)93946-H","url":null,"abstract":"<div><p>A hollow-fibre permeator containing silicone rubber membranes has been used for the removal of CO<sub>2</sub> from a breathing gas mixture. The effect of permeate gas absorption with water in the shell side of the permeator has been investigated and compared with conventional systems with and without permeate gas purge. Experimental results compare favourably with theoretical predictions. It has been shown that the use of an aqueous solution as an absorbing medium in the permeate side of the permeator can greatly improve CO<sub>2</sub> separation from the gas mixture and reduce the need to maintain a high pressure ratio across the membrane. The improved CO<sub>2</sub> selectivity is found to be caused mainly by the liquid film which, however, creates film resistance, resulting in much reduced CO<sub>2</sub> permeation flux. The CO<sub>2</sub> permeation flux can be improved using an alkaline solution instead of neutral water.</p></div>","PeriodicalId":12586,"journal":{"name":"Gas Separation & Purification","volume":"9 2","pages":"Pages 93-100"},"PeriodicalIF":0.0,"publicationDate":"1995-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0950-4214(95)93946-H","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81921735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Electrochemical membrane separation devices and the effect of networking 电化学膜分离装置及联网效果
Gas Separation & Purification Pub Date : 1995-06-01 DOI: 10.1016/0950-4214(95)93949-K
J.G. Wimer , M.C. Williams , D.H. Archer , J.F. Osterle
{"title":"Electrochemical membrane separation devices and the effect of networking","authors":"J.G. Wimer ,&nbsp;M.C. Williams ,&nbsp;D.H. Archer ,&nbsp;J.F. Osterle","doi":"10.1016/0950-4214(95)93949-K","DOIUrl":"10.1016/0950-4214(95)93949-K","url":null,"abstract":"<div><p>The US Department of Energy's Morgantown Energy Technology Center (METC) sponsors the research and development of two technologies involving electrochemical membranes: fuel cells and separation devices. METC also works towards developing electric power generation systems which utilize both of these technologies. This paper discusses the general theory and operation of electrochemical membrane separation devices, the advantages of networking them, and some potential applications.</p></div>","PeriodicalId":12586,"journal":{"name":"Gas Separation & Purification","volume":"9 2","pages":"Pages 121-124"},"PeriodicalIF":0.0,"publicationDate":"1995-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0950-4214(95)93949-K","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81653996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信