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
Annoncements Annoncements
Gas Separation & Purification Pub Date : 1994-01-01 DOI: 10.1016/0950-4214(94)85013-5
{"title":"Annoncements","authors":"","doi":"10.1016/0950-4214(94)85013-5","DOIUrl":"https://doi.org/10.1016/0950-4214(94)85013-5","url":null,"abstract":"","PeriodicalId":12586,"journal":{"name":"Gas Separation & Purification","volume":"8 1","pages":"Page 60"},"PeriodicalIF":0.0,"publicationDate":"1994-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0950-4214(94)85013-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137251069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A simple model for a water gas shift membrane reactor 水-气移位膜反应器的简单模型
Gas Separation & Purification Pub Date : 1994-01-01 DOI: 10.1016/0950-4214(94)80016-2
A.S. Damle, S.K. Gangwal, V.K. Venkataraman
{"title":"A simple model for a water gas shift membrane reactor","authors":"A.S. Damle,&nbsp;S.K. Gangwal,&nbsp;V.K. Venkataraman","doi":"10.1016/0950-4214(94)80016-2","DOIUrl":"10.1016/0950-4214(94)80016-2","url":null,"abstract":"<div><p>A simplified process model was developed to simulate a catalytic membrane water gas shift (WGS) reactor. A number of computer simulations were conducted to determine the potential of increased carbon monoxide (CO) conversion in WGS reaction due to simultaneous separation of product hydrogen (H<sub>2</sub>) from the reactant mixture. Gas separation factors based on Knudsen diffusion were used in these simulations to assess the feasibility of inorganic and ceramic membranes in a high-temperature, high-pressure (HTHP) coal gasification environment. The simulations indicated that although the increase in CO conversion and hydrogen concentration in a single membrane reactor stage was significant, a multistage membrane separation system would be needed to increase the hydrogen product concentration above 90%. As expected, increasing the feed pressure to permeate pressure ratio was found to increase the CO conversion and the product hydrogen concentration. At low feed to permeate pressure ratios, the model predicted a much better membrane reactor performance with a countercurrent feed and permeate flow scheme when compared with a concurrent flow scheme. The membrane performance, of course, depends strongly on the gas separation factors. With gas separation factors lower than the ideal Knudsen diffusion separation factors (e.g. H<sub>2</sub> to CO<sub>2</sub> separation factor of 2 instead of the ideal Knudsen value of 4.7), the model simulation predicted a much smaller increase in CO conversion and product hydrogen concentration.</p></div>","PeriodicalId":12586,"journal":{"name":"Gas Separation & Purification","volume":"8 2","pages":"Pages 101-106"},"PeriodicalIF":0.0,"publicationDate":"1994-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0950-4214(94)80016-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86536386","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: 23
Investigation of the mechanism for the separation of nitrogen—oxygen mixtures on carbon molecular sieves 碳分子筛分离氮氧混合物的机理研究
Gas Separation & Purification Pub Date : 1994-01-01 DOI: 10.1016/0950-4214(94)85007-0
Frank R. Fitch, Martin Bülow, Alberto I. LaCava
{"title":"Investigation of the mechanism for the separation of nitrogen—oxygen mixtures on carbon molecular sieves","authors":"Frank R. Fitch,&nbsp;Martin Bülow,&nbsp;Alberto I. LaCava","doi":"10.1016/0950-4214(94)85007-0","DOIUrl":"10.1016/0950-4214(94)85007-0","url":null,"abstract":"<div><p>Sorption separation of nitrogen-oxygen mixtures by carbon molecular sieves, e.g. to produce nitrogen using the pressure swing adsorption principle, proceeds under the condition of non-equilibrium. Experimental data based upon measurements of sorption equilibria and kinetics for nitrogen and oxygen on several samples of carbon molecular sieve particles in the temperature range 0–50°C suggest the existence of a surface barrier in the pore mouths of slit-like micropores for these particular samples. The conclusion on this phenomenon is supported by the results of canonical and grand canonical Monte Carlo simulations. Both types of analysis give a deeper insight into the complex non-equilibrium separation process.</p></div>","PeriodicalId":12586,"journal":{"name":"Gas Separation & Purification","volume":"8 1","pages":"Pages 45-51"},"PeriodicalIF":0.0,"publicationDate":"1994-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0950-4214(94)85007-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75907744","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: 10
Index 指数
Gas Separation & Purification Pub Date : 1994-01-01 DOI: 10.1016/0950-4214(94)80010-3
{"title":"Index","authors":"","doi":"10.1016/0950-4214(94)80010-3","DOIUrl":"https://doi.org/10.1016/0950-4214(94)80010-3","url":null,"abstract":"","PeriodicalId":12586,"journal":{"name":"Gas Separation & Purification","volume":"8 4","pages":"Pages 270-271"},"PeriodicalIF":0.0,"publicationDate":"1994-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0950-4214(94)80010-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137376342","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: 0
Structural heterogeneity in the equilibrium data for hydrocarbons and carbon oxides on activated carbons 活性炭上碳氢化合物和碳氧化物平衡数据的结构非均质性
Gas Separation & Purification Pub Date : 1994-01-01 DOI: 10.1016/0950-4214(94)80014-6
H.D. Do, D.D. Do
{"title":"Structural heterogeneity in the equilibrium data for hydrocarbons and carbon oxides on activated carbons","authors":"H.D. Do,&nbsp;D.D. Do","doi":"10.1016/0950-4214(94)80014-6","DOIUrl":"10.1016/0950-4214(94)80014-6","url":null,"abstract":"<div><p>In this paper, we develop a theory to investigate the structural heterogeneity in the adsorption equilibria for gas-solid systems. The structural heterogeneity is characterized by the micropore size distribution. We assume that the solid is made up of patches of pores having the same size and that the local isotherm at a given patch follows either the Langmuir or Jovanovic equation. The network of patched micropores follows a certain distribution. We collected adsorption equilibrium data for a range of adsorbates, ethane, propane, butane, pentane, benzene and carbon dioxide, on an Ajax activated carbon. With these data, and data available from the literature on a number of activated carbons, we extracted their micropore size distributions with the constraint that these distributions must be independent of adsorbate and temperature.</p></div>","PeriodicalId":12586,"journal":{"name":"Gas Separation & Purification","volume":"8 2","pages":"Pages 77-93"},"PeriodicalIF":0.0,"publicationDate":"1994-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0950-4214(94)80014-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75656855","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: 8
Best products of homogeneous azeotropic distillations 均相共沸蒸馏的最佳产物
Gas Separation & Purification Pub Date : 1994-01-01 DOI: 10.1016/0950-4214(94)80001-4
P. Poellmann, E. Blass
{"title":"Best products of homogeneous azeotropic distillations","authors":"P. Poellmann,&nbsp;E. Blass","doi":"10.1016/0950-4214(94)80001-4","DOIUrl":"10.1016/0950-4214(94)80001-4","url":null,"abstract":"","PeriodicalId":12586,"journal":{"name":"Gas Separation & Purification","volume":"8 4","pages":"Pages 194-228"},"PeriodicalIF":0.0,"publicationDate":"1994-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0950-4214(94)80001-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81742329","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: 65
Gas separation properties of new polyoxadiazole and polytriazole membranes 新型聚恶二唑和聚三唑膜的气体分离性能
Gas Separation & Purification Pub Date : 1994-01-01 DOI: 10.1016/0950-4214(94)80025-1
E.R. Hensema , M.E.R. Sena , M.H.V. Mulder, C.A. Smolders
{"title":"Gas separation properties of new polyoxadiazole and polytriazole membranes","authors":"E.R. Hensema ,&nbsp;M.E.R. Sena ,&nbsp;M.H.V. Mulder,&nbsp;C.A. Smolders","doi":"10.1016/0950-4214(94)80025-1","DOIUrl":"10.1016/0950-4214(94)80025-1","url":null,"abstract":"<div><p>The gas separation properties of new aromatic poly-1,2,4-triazole and poly-1,3,4-oxadiazole membranes have been systematically investigated. Various functional groups were incorporated as pendent groups <em>onto</em> the polymer backbone of poly-1,2,4-triazoles. A wide permeability/selectivity spectrum was covered with the choice of functional groups incorporated <em>into</em> the polymer backbone of poly-1,3,4-oxadiazoles. High permeabilities were found for poly-1,3,4-oxadiazoles with a 1,1,3-trimethyl-3-phenylindane (PIDA-POD) and a 4,4′(2,2′-diphenyl)hexafluor propane (HF-POD) unit in the polymer backbone, while incorporation of a 4,4′-diphenyl ether unit (DPE-POD) results in a polymer with a low permeability but an extremely high selectivity. While the permeabilities vary over four orders of magnitude, the solubility remains almost constant and, therefore, the increase in permeability is mainly due to an increase in diffusivity. The permeability is discussed in terms of the polymer free volume.</p></div>","PeriodicalId":12586,"journal":{"name":"Gas Separation & Purification","volume":"8 3","pages":"Pages 149-160"},"PeriodicalIF":0.0,"publicationDate":"1994-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0950-4214(94)80025-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80530692","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: 17
Linear driving force approximation for diffusion in spherical adsorbents with binary non-linear adsorption 二元非线性吸附球形吸附剂中扩散的线性驱动力近似
Gas Separation & Purification Pub Date : 1994-01-01 DOI: 10.1016/0950-4214(94)80002-2
Adélio M.M. Mendes, Carlos A.V. Costa, Alírio E. Rodrigues
{"title":"Linear driving force approximation for diffusion in spherical adsorbents with binary non-linear adsorption","authors":"Adélio M.M. Mendes,&nbsp;Carlos A.V. Costa,&nbsp;Alírio E. Rodrigues","doi":"10.1016/0950-4214(94)80002-2","DOIUrl":"10.1016/0950-4214(94)80002-2","url":null,"abstract":"<div><p>This paper presents a new linear driving force approximation applicable to the cyclic steady-state in the case of pore diffusion in the presence of binary Langmuirian adsorption for a spherical particle under a periodic boundary condition in composition, total pressure or both. This approximation uses two parameters Ω, one for each solute, calculated for a square wave with the same period and a second pair of parameters that correct the approximation for the phase lags.</p><p>An assessment of the quality of the approximation was made by measuring the differences between the cumulative fluxes calculated by the diffusion and the linear driving force models through an average relative quadratic error. It is shown that this error is less than 5% for equilibrium, diffusion and frequency conditions in the range of practical adsorption systems. The same approximation can be used in the case of homogeneous diffusion.</p></div>","PeriodicalId":12586,"journal":{"name":"Gas Separation & Purification","volume":"8 4","pages":"Pages 229-236"},"PeriodicalIF":0.0,"publicationDate":"1994-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0950-4214(94)80002-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91544951","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: 11
Non-isothermal regeneration of molecular sieve adsorbers in a cyclic process of air purification from moisture and carbon dioxide 分子筛吸附剂在空气净化过程中的非等温再生
Gas Separation & Purification Pub Date : 1994-01-01 DOI: 10.1016/0950-4214(94)80027-8
V.A. Naumov, V.B. Vorotynthev, G.V. Kusiy
{"title":"Non-isothermal regeneration of molecular sieve adsorbers in a cyclic process of air purification from moisture and carbon dioxide","authors":"V.A. Naumov,&nbsp;V.B. Vorotynthev,&nbsp;G.V. Kusiy","doi":"10.1016/0950-4214(94)80027-8","DOIUrl":"10.1016/0950-4214(94)80027-8","url":null,"abstract":"<div><p>Non-isothermal desorption of moisture and carbon dioxide from a layer of molecular sieve NaX has been studied on the basis of the proposed mathematical model. It is shown that it is not expedient to maintain the carbon dioxide desorption temperature above 353 K in the real industrial process while the minimum temperature of the moisture desorption should be within the range 373–423 K. The application of the thermal wave adsorption method to the problem of regeneration from the main impurities of air allows the power consumption to be significantly reduced. A simplified model of a cyclic process of air purification under incomplete desorption of moisture has been suggested. A comparison is made of the results of the calculations and the test data obtained on the commercial adsorbers of a low-pressure air separation plant when the regenerating gas temperature is decreased from 653 to 373 K. Good qualitative and satisfactory quantitative agreement of the calculated and observed results is observed.</p></div>","PeriodicalId":12586,"journal":{"name":"Gas Separation & Purification","volume":"8 3","pages":"Pages 167-174"},"PeriodicalIF":0.0,"publicationDate":"1994-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0950-4214(94)80027-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85898388","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: 1
Reply to the comments by Dr Douglas Ruthven 回复Douglas Ruthven博士的评论
Gas Separation & Purification Pub Date : 1994-01-01 DOI: 10.1016/0950-4214(94)85009-7
T. Inui
{"title":"Reply to the comments by Dr Douglas Ruthven","authors":"T. Inui","doi":"10.1016/0950-4214(94)85009-7","DOIUrl":"10.1016/0950-4214(94)85009-7","url":null,"abstract":"","PeriodicalId":12586,"journal":{"name":"Gas Separation & Purification","volume":"8 1","pages":"Page 53"},"PeriodicalIF":0.0,"publicationDate":"1994-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0950-4214(94)85009-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83368663","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: 0
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