Separations Technology最新文献

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Experimental determination of the binary equilibrium adsorption and desorption of propane-propylene mixtures on 13X molecular sieves by a differential sorption bed system and investigation of their equilibrium expressions 差分吸附床系统在13X分子筛上二元平衡吸附和解吸的实验测定及其平衡表达式的研究
Separations Technology Pub Date : 1994-07-01 DOI: 10.1016/0956-9618(94)80018-9
Y.-H. Huang, J.W. Johnson, A.I. Liapis, O.K. Crosser
{"title":"Experimental determination of the binary equilibrium adsorption and desorption of propane-propylene mixtures on 13X molecular sieves by a differential sorption bed system and investigation of their equilibrium expressions","authors":"Y.-H. Huang,&nbsp;J.W. Johnson,&nbsp;A.I. Liapis,&nbsp;O.K. Crosser","doi":"10.1016/0956-9618(94)80018-9","DOIUrl":"10.1016/0956-9618(94)80018-9","url":null,"abstract":"<div><p>The experimental adsorption and desorption equilibrium data for propane, propylene, and propane-propylene mixtures on 13X molecular sieves are presented for different temperatures and compositions; these data were efficiently determined by using the differential sorption bed system described by Liapis et al. (Sep. Technol. 1992, <strong>2</strong>, 141–154). The Toth equation was found to correlate with the experimental equilibrium single-component data very well. For the binary propane-propylene mixtures, propylene is the most preferentially adsorbed component. The feasibility of describing the experimental binary equilibrium data with the ideal adsorbed solution expressions, the heterogeneous ideal adsorbed solution expressions and the heterogeneous ideal adsorbed solution with specific gas-solid interactions expressions was examined. Comparison between these expressions and the experimental binary equilibrium data showed that none of the expressions could satisfactorily describe the experimental results for the binary mixtures for all temperatures and compositions studied in this work. For a given multicomponent adsorption system of interest, numerous sets of experimental equilibrium data of adsorption and desorption could be efficiently and accurately determined by using the differential sorption bed system and the experimental procedures described in this work; these results could be used in parameter estimation and model discrimination studies, as well as in process design.</p></div>","PeriodicalId":101160,"journal":{"name":"Separations Technology","volume":"4 3","pages":"Pages 156-166"},"PeriodicalIF":0.0,"publicationDate":"1994-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-9618(94)80018-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86421053","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
Chemically enhanced filtration and dewatering of narrow-sized coal particles 窄粒度煤颗粒的化学强化过滤和脱水
Separations Technology Pub Date : 1994-07-01 DOI: 10.1016/0956-9618(94)80016-2
Dong-Jin Sung , Raffi M. Turian
{"title":"Chemically enhanced filtration and dewatering of narrow-sized coal particles","authors":"Dong-Jin Sung ,&nbsp;Raffi M. Turian","doi":"10.1016/0956-9618(94)80016-2","DOIUrl":"10.1016/0956-9618(94)80016-2","url":null,"abstract":"<div><p>An experimental study of the filtration and dewatering of fine coal with and without additives was carried out. Filtration and dewatering behavior were determined using a vacuum filtration cell. The variables studied included the driving force, solids concentration, filter area, particle size and slurry pH. The effects of several flocculants, surfactants and hydrophobing additives (oils) on final moisture content of the filter cakes were determined. The investigations included determination of the rates of filtration and dewatering, assessment of the effects of additive type (anionic, cationic and nonionic), and establishment of optimum dosage of additives. Overall, it was found that the filtration and dewatering behavior were enhanced by increased driving force, higher initial slurry concentration, larger filtration area, larger particle size and lower slurry pH. Among surfactants and flocculating additives the anionic types were found to do the best job of filtration enhancement. At optimum dosages, the final cake moisture contents were reduced by 3.6% and 5.8% by weight using the appropriate surfactant and flocculant, respectively. However, the best filtration enhancements were achieved by addition of oils, which yielded cake moisture reductions of approximately 10% by weight.</p></div>","PeriodicalId":101160,"journal":{"name":"Separations Technology","volume":"4 3","pages":"Pages 130-143"},"PeriodicalIF":0.0,"publicationDate":"1994-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-9618(94)80016-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82896917","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
Monte carlo simulation of multicomponent system by macro state markov chain model 基于宏观状态马尔可夫链模型的多组分系统蒙特卡罗仿真
Separations Technology Pub Date : 1994-07-01 DOI: 10.1016/0956-9618(94)80019-7
Ai Chen , Cynthia S. Hirtzel
{"title":"Monte carlo simulation of multicomponent system by macro state markov chain model","authors":"Ai Chen ,&nbsp;Cynthia S. Hirtzel","doi":"10.1016/0956-9618(94)80019-7","DOIUrl":"10.1016/0956-9618(94)80019-7","url":null,"abstract":"<div><p>The Macro State Markov Chain Model (MSMCM) is useful in developing parallel Monte Carlo simulation schemes to dramatically reduce computer simulation time (Chen, A. Hirtzel, C. S. Molecular Physics 1993, submitted; Chen, A.; Ph.D. diss., 1993). In this article, some special issues are addressed to apply the MSMCM to multicomponent system. A fourth type of transition, “replacement,” in addition to the conventional “move,” “add” and “remove” transitions, is introduced to guarantee the reachability of all states in a macro state. Adsorption of a mixture of oxygen and nitrogen in zeolite 5A is studied using the MSMCM model</p></div>","PeriodicalId":101160,"journal":{"name":"Separations Technology","volume":"4 3","pages":"Pages 167-173"},"PeriodicalIF":0.0,"publicationDate":"1994-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-9618(94)80019-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88509199","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
Enhancement of in situ adsorption on the acetone-butanol fermentation by Clostridium acetobutylicum 乙酰丁酸梭菌对丙酮-丁醇发酵的原位吸附强化
Separations Technology Pub Date : 1994-04-01 DOI: 10.1016/0956-9618(94)80009-X
Xiaoping Yang, G. Tsai, G. Tsao
{"title":"Enhancement of in situ adsorption on the acetone-butanol fermentation by Clostridium acetobutylicum","authors":"Xiaoping Yang, G. Tsai, G. Tsao","doi":"10.1016/0956-9618(94)80009-X","DOIUrl":"https://doi.org/10.1016/0956-9618(94)80009-X","url":null,"abstract":"","PeriodicalId":101160,"journal":{"name":"Separations Technology","volume":"27 1","pages":"81-92"},"PeriodicalIF":0.0,"publicationDate":"1994-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91535710","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: 90
A complementary pressure swing adsorption process configuration for air separation 一种用于空气分离的互补变压吸附工艺配置
Separations Technology Pub Date : 1994-04-01 DOI: 10.1016/0956-9618(94)80010-3
Cheng-tung Chou, Chih-Lung Wu, Anthony S.T. Chiang
{"title":"A complementary pressure swing adsorption process configuration for air separation","authors":"Cheng-tung Chou,&nbsp;Chih-Lung Wu,&nbsp;Anthony S.T. Chiang","doi":"10.1016/0956-9618(94)80010-3","DOIUrl":"https://doi.org/10.1016/0956-9618(94)80010-3","url":null,"abstract":"<div><p>We propose a complementary pressure swing adsorption (CPSA) process consisting of four beds for separating air into enriched oxygen and nitrogen. Simulation results showed that the CPSA process performed better than either the oxygen process or the nitrogen process. Using zeolite 5A and 4A as adsorbents, the mole fraction of oxygen and argon in the enriched oxygen may be as high as 99.57% (at 34.44% recovery), and the purity of the enriched nitrogen about 98% (at 47.86% recovery). For producing enriched oxygen of 80–90% purity, a modified CPSA process is suggested. The relationships between production rate, purity, and oxygen and nitrogen recoveries are discussed.</p></div>","PeriodicalId":101160,"journal":{"name":"Separations Technology","volume":"4 2","pages":"Pages 93-103"},"PeriodicalIF":0.0,"publicationDate":"1994-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-9618(94)80010-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91722079","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: 7
A complementary pressure swing adsorption process configuration for air separation 一种用于空气分离的互补变压吸附工艺配置
Separations Technology Pub Date : 1994-04-01 DOI: 10.1016/0956-9618(94)80010-3
C. Chou, Chih-Lung Wu, A. Chiang
{"title":"A complementary pressure swing adsorption process configuration for air separation","authors":"C. Chou, Chih-Lung Wu, A. Chiang","doi":"10.1016/0956-9618(94)80010-3","DOIUrl":"https://doi.org/10.1016/0956-9618(94)80010-3","url":null,"abstract":"","PeriodicalId":101160,"journal":{"name":"Separations Technology","volume":"117 1","pages":"93-103"},"PeriodicalIF":0.0,"publicationDate":"1994-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79800378","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: 7
Recovery of acetic acid and propionic acid from aqueous waste stream 废水中醋酸和丙酸的回收
Separations Technology Pub Date : 1994-04-01 DOI: 10.1016/0956-9618(94)80014-6
M.N. Ingale, V.V. Mahajani
{"title":"Recovery of acetic acid and propionic acid from aqueous waste stream","authors":"M.N. Ingale,&nbsp;V.V. Mahajani","doi":"10.1016/0956-9618(94)80014-6","DOIUrl":"https://doi.org/10.1016/0956-9618(94)80014-6","url":null,"abstract":"","PeriodicalId":101160,"journal":{"name":"Separations Technology","volume":"4 2","pages":"Pages 123-126"},"PeriodicalIF":0.0,"publicationDate":"1994-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-9618(94)80014-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90125504","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: 16
Further work on the modification of the Frazier thermal-diffusion system 改进弗雷泽热扩散系统的进一步工作
Separations Technology Pub Date : 1994-04-01 DOI: 10.1016/0956-9618(94)80012-X
Ho-Ming Yeh
{"title":"Further work on the modification of the Frazier thermal-diffusion system","authors":"Ho-Ming Yeh","doi":"10.1016/0956-9618(94)80012-X","DOIUrl":"10.1016/0956-9618(94)80012-X","url":null,"abstract":"<div><p>A new modification of the Frazier-thermal-diffusion system in which column length varies by a constant increment is proposed. Equations for estimating the most optimal column-length increment and column number corresponding to a maximum degree of separation are derived. It is found that by adopting the present modification, substantial improvement in performance over the classical Frazier scheme may be achieved.</p></div>","PeriodicalId":101160,"journal":{"name":"Separations Technology","volume":"4 2","pages":"Pages 112-117"},"PeriodicalIF":0.0,"publicationDate":"1994-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-9618(94)80012-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84087602","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
Approximate solution of intraparticle diffusion equations and their application to continuous-flow stirred tank and fixed-bed adsorption calculations 颗粒内扩散方程的近似解及其在连续流搅拌槽和固定床吸附计算中的应用
Separations Technology Pub Date : 1994-04-01 DOI: 10.1016/0956-9618(94)80008-1
Chuncai Yao , Chi Tien
{"title":"Approximate solution of intraparticle diffusion equations and their application to continuous-flow stirred tank and fixed-bed adsorption calculations","authors":"Chuncai Yao ,&nbsp;Chi Tien","doi":"10.1016/0956-9618(94)80008-1","DOIUrl":"https://doi.org/10.1016/0956-9618(94)80008-1","url":null,"abstract":"<div><p>The two approximate uptake rate expressions of spherical adsorbent pellets developed previously (Yao, C. and Tien, C. Approximation of uptake rate of spherical adsorbent pellets and their application to batch adsorption calculations. Chem. Eng. Sci. 1993, <strong>48</strong>, 187) were applied to continuous-flow stirred tank and fixed-bed adsorption processes. The results show that both approximations represent improvement over the conventional linear driving force model. Relative accuracy of these two approximations was found to vary from case to case and can be related to the type of driving force for interphase mass transfer present in the particular problem.</p></div>","PeriodicalId":101160,"journal":{"name":"Separations Technology","volume":"4 2","pages":"Pages 67-80"},"PeriodicalIF":0.0,"publicationDate":"1994-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-9618(94)80008-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91758127","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
Microscopic observation of filter cake formation 滤饼形成的显微观察
Separations Technology Pub Date : 1994-04-01 DOI: 10.1016/0956-9618(94)80013-8
G.G. Chase, J. Steffen, D. Ott
{"title":"Microscopic observation of filter cake formation","authors":"G.G. Chase,&nbsp;J. Steffen,&nbsp;D. Ott","doi":"10.1016/0956-9618(94)80013-8","DOIUrl":"https://doi.org/10.1016/0956-9618(94)80013-8","url":null,"abstract":"<div><p>Particle collisions and filter cake collapse are observed through a microscope during the formation of filter cakes. Cake filtration is widely applied throughout industry for fluid-particle separations. Models and theories have been developed to describe and predict filter cake performance, but there is little literature on direct observation of particle packing and cake formation. A filter assembly the size of a microscope slide is placed on the microscope such that the slurry flow and cake formation is across the field of view. The cake formation is recorded on video tape. Photographs of the video image show particles in the slurry colliding with and sometimes adhering to other particles when forming the filter cake. The photographs also show the cake structure collapse as the cake compacts or compresses.</p></div>","PeriodicalId":101160,"journal":{"name":"Separations Technology","volume":"4 2","pages":"Pages 118-122"},"PeriodicalIF":0.0,"publicationDate":"1994-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-9618(94)80013-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91722774","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: 7
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