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Subject index of volume 52 第52卷的主题索引
The Chemical Engineering Journal Pub Date : 1993-10-01 DOI: 10.1016/0300-9467(93)80069-Z
{"title":"Subject index of volume 52","authors":"","doi":"10.1016/0300-9467(93)80069-Z","DOIUrl":"https://doi.org/10.1016/0300-9467(93)80069-Z","url":null,"abstract":"","PeriodicalId":101225,"journal":{"name":"The Chemical Engineering Journal","volume":"52 3","pages":"Pages 153-155"},"PeriodicalIF":0.0,"publicationDate":"1993-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0300-9467(93)80069-Z","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91765004","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
Studies on modelling and simulation of lactose hydrolysis by free and immobilized β-galactosidase from Aspergillus niger 游离和固定化黑曲霉β-半乳糖苷酶水解乳糖的建模与模拟研究
The Chemical Engineering Journal Pub Date : 1993-08-01 DOI: 10.1016/0300-9467(93)80044-O
N. Papayannakos, G. Markas, D. Kekos
{"title":"Studies on modelling and simulation of lactose hydrolysis by free and immobilized β-galactosidase from Aspergillus niger","authors":"N. Papayannakos,&nbsp;G. Markas,&nbsp;D. Kekos","doi":"10.1016/0300-9467(93)80044-O","DOIUrl":"10.1016/0300-9467(93)80044-O","url":null,"abstract":"<div><p>β-Galactosidase from <em>Aspergillus niger</em> was immobilized effectively on a porous ceramic monolith by adsorption and intermolecular cross-linking. The binding efficiency reached 80% and no enzyme leaching was observed even under vigorous mechanical agitation. Immobilization did not change the pH optimum of lactose hydrolysis. The enzyme decay followed first-order kinetics and the thermal stability of the immobilized lactase was considerably enhanced. At 50 °C and pH 3.6 the half-life of the immobilized lactase was 180 days and that of the free enzyme 24 days. The kinetics of lactose hydrolysis by both free and immobilized lactase were studied in a batch reactor system in the absence of any mass transfer limitations. In both cases the totally competitive galactose inhibition kinetic model predicted the experimental data. Simulation of the performance of a laboratory continuous flow immobilized lactase reactor system showed that experimental results could be predicted by the ideal plug flow model when an apparent effectiveness factor <em>n</em><sub>f</sub>=0.65 is used to take into account the external mass transfer limitations.</p></div>","PeriodicalId":101225,"journal":{"name":"The Chemical Engineering Journal","volume":"52 1","pages":"Pages B1-B12"},"PeriodicalIF":0.0,"publicationDate":"1993-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0300-9467(93)80044-O","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53641987","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: 41
Comment on studies on the heat transfer in slurry bubble columns (S. C. Saxena, N. S. Rao and A. C. Saxena, Chem. Eng. J., 44 (1990) 141; S. C. Saxena, N. S. Rao and M. Yousuf, Chem. Eng. J., 47 (1991) 91) 对浆液气泡塔传热研究的评论（S. C. Saxena、N. S. Rao 和 A. C. Saxena，Chem.J., 44 (1990) 141; S. C. Saxena, Chem.J., 44 (1990) 141; S. C. Saxena, N. S. Rao and M. Yousuf, Chem.J., 47 (1991) 91J., 47 (1991) 91)
The Chemical Engineering Journal Pub Date : 1993-08-01 DOI: 10.1016/0300-9467(93)80042-M
I.-S. Suh, W.-D. Deckwer
{"title":"Comment on studies on the heat transfer in slurry bubble columns (S. C. Saxena, N. S. Rao and A. C. Saxena, Chem. Eng. J., 44 (1990) 141; S. C. Saxena, N. S. Rao and M. Yousuf, Chem. Eng. J., 47 (1991) 91)","authors":"I.-S. Suh,&nbsp;W.-D. Deckwer","doi":"10.1016/0300-9467(93)80042-M","DOIUrl":"https://doi.org/10.1016/0300-9467(93)80042-M","url":null,"abstract":"","PeriodicalId":101225,"journal":{"name":"The Chemical Engineering Journal","volume":"52 1","pages":"Pages 49-50"},"PeriodicalIF":0.0,"publicationDate":"1993-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0300-9467(93)80042-M","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136716119","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
Reply to “comment on studies on the heat transfer in slurry bubble columns” (I.-S. Suh and W.-D. Deckwer, Chem. Eng. J., 52 (1993) 49) 回复《关于浆体泡塔内传热研究的意见》(i - s。Suh和w.d。Deckwer,化学。Eng。J.， 52 (1993) 49)
The Chemical Engineering Journal Pub Date : 1993-08-01 DOI: 10.1016/0300-9467(93)80043-N
S.C. Saxena, Z.D. Chen
{"title":"Reply to “comment on studies on the heat transfer in slurry bubble columns” (I.-S. Suh and W.-D. Deckwer, Chem. Eng. J., 52 (1993) 49)","authors":"S.C. Saxena,&nbsp;Z.D. Chen","doi":"10.1016/0300-9467(93)80043-N","DOIUrl":"10.1016/0300-9467(93)80043-N","url":null,"abstract":"","PeriodicalId":101225,"journal":{"name":"The Chemical Engineering Journal","volume":"52 1","pages":"Pages 51-52"},"PeriodicalIF":0.0,"publicationDate":"1993-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0300-9467(93)80043-N","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53641980","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
Catalytic afterburners with not fully developed flow: modelling and experimental performances 流动不完全发展的催化加力燃烧室:模型和实验性能
The Chemical Engineering Journal Pub Date : 1993-08-01 DOI: 10.1016/0300-9467(93)80052-P
Antonello A. Barresi, Italo Mazzarino, Marco Vanni, Giancarlo Baldi
{"title":"Catalytic afterburners with not fully developed flow: modelling and experimental performances","authors":"Antonello A. Barresi,&nbsp;Italo Mazzarino,&nbsp;Marco Vanni,&nbsp;Giancarlo Baldi","doi":"10.1016/0300-9467(93)80052-P","DOIUrl":"10.1016/0300-9467(93)80052-P","url":null,"abstract":"<div><p>Catalytic afterburners using short monoliths take advantage of the enhancement of the transfer coefficients in not fully developed flow. The correlations for Nu and Sh in laminar flow in the entrance region of a monolith available from the literature are evaluated and compared with experimental data. A one-dimensional model is proposed and solved using the orthogonal collocation method under stationary and transient conditions.</p><p>The calculated results were compared with experimental data for the combustion of lean benzene—air mixtures in a short monolith.</p><p>The model is able to describe the behaviour of the afterburner satisfactorily if local Nu and Sh values for simultaneously developing velocity, temperature and concentration profiles are employed. If the light-off occurs part way along the monolith channels, a new thermal entrance should be considered.</p></div>","PeriodicalId":101225,"journal":{"name":"The Chemical Engineering Journal","volume":"52 2","pages":"Pages 79-88"},"PeriodicalIF":0.0,"publicationDate":"1993-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0300-9467(93)80052-P","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53642073","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: 3
Production of potassium sulphate—magnesium sulphate double salt and magnesium-chloride-rich solution from seawater bitterns 以海水卤水为原料生产硫酸钾-硫酸镁双盐及富氯化镁溶液
The Chemical Engineering Journal Pub Date : 1993-08-01 DOI: 10.1016/0300-9467(93)80053-Q
J.A.Fernandez Lozano
{"title":"Production of potassium sulphate—magnesium sulphate double salt and magnesium-chloride-rich solution from seawater bitterns","authors":"J.A.Fernandez Lozano","doi":"10.1016/0300-9467(93)80053-Q","DOIUrl":"10.1016/0300-9467(93)80053-Q","url":null,"abstract":"<div><p>A brief presentation and discussion of laboratory work and technical aspects are given. A flow diagram is included. Inherent operational difficulties are mentioned and methods given to eliminate them. The particularly promising aspects of the process are high yields and simplicity.</p></div>","PeriodicalId":101225,"journal":{"name":"The Chemical Engineering Journal","volume":"52 2","pages":"Pages 89-92"},"PeriodicalIF":0.0,"publicationDate":"1993-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0300-9467(93)80053-Q","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53642081","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
A capacitance probe to characterize gas bubbles in stirred tank reactors 表征搅拌槽式反应器中气泡的电容探头
The Chemical Engineering Journal Pub Date : 1993-08-01 DOI: 10.1016/0300-9467(93)80035-M
Erie Favre , Pierre Voumard , Urs von Stockar , Paul Péringer
{"title":"A capacitance probe to characterize gas bubbles in stirred tank reactors","authors":"Erie Favre ,&nbsp;Pierre Voumard ,&nbsp;Urs von Stockar ,&nbsp;Paul Péringer","doi":"10.1016/0300-9467(93)80035-M","DOIUrl":"10.1016/0300-9467(93)80035-M","url":null,"abstract":"<div><p>An invasive plate and frame capacitance probe was designed for dielectric constant measurements over a wide frequency range (10–5000 kHz) in a 5 l stirred tank reactor. Preliminary measurements with polyethylene beads showed a linear variation of the effective permittivity with the volume fraction of the beads, in accordance with the Maxwell-Wagner theory. Results obtained by bubbling air under various agitation and aeration rates at 500 kHz in deionized water, and the effect of a non-ionic antifoam on permittivity variations, are shown and discussed; the technique is thought to allow precise local holdup measurements. Existing limitations and possible further improvements of the technique are discussed, especially in view of the information that can be gained from the standard deviation of the measurements.</p></div>","PeriodicalId":101225,"journal":{"name":"The Chemical Engineering Journal","volume":"52 1","pages":"Pages 1-7"},"PeriodicalIF":0.0,"publicationDate":"1993-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0300-9467(93)80035-M","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53641893","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: 5
Power consumption of screw and helical ribbon agitators in highly viscous pseudoplastic fluids 高粘性假塑性流体中螺旋和螺旋带式搅拌器的功率消耗
The Chemical Engineering Journal Pub Date : 1993-08-01 DOI: 10.1016/0300-9467(93)80036-N
J. Netušil, F. Rieger
{"title":"Power consumption of screw and helical ribbon agitators in highly viscous pseudoplastic fluids","authors":"J. Netušil,&nbsp;F. Rieger","doi":"10.1016/0300-9467(93)80036-N","DOIUrl":"10.1016/0300-9467(93)80036-N","url":null,"abstract":"<div><p>Power consumption measurement of screw and helical ribbon agitators of efficient geometry which mixed pseudoplastic fluids in the creeping-flow regime, was performed. The values of the Metzner—Otto coefficient <em>k</em> and relations for its calculation were suggested on the basis of experimental results.</p></div>","PeriodicalId":101225,"journal":{"name":"The Chemical Engineering Journal","volume":"52 1","pages":"Pages 9-12"},"PeriodicalIF":0.0,"publicationDate":"1993-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0300-9467(93)80036-N","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53641901","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
Influence of organic loading rate on the anaerobic treatment of high strength semisynthetic waste waters in a biological fluidized bed 有机负荷率对生物流化床高强度半合成废水厌氧处理的影响
The Chemical Engineering Journal Pub Date : 1993-08-01 DOI: 10.1016/0300-9467(93)80046-Q
A. Converti, M. Del Borghi, G. Ferraiolo
{"title":"Influence of organic loading rate on the anaerobic treatment of high strength semisynthetic waste waters in a biological fluidized bed","authors":"A. Converti,&nbsp;M. Del Borghi,&nbsp;G. Ferraiolo","doi":"10.1016/0300-9467(93)80046-Q","DOIUrl":"10.1016/0300-9467(93)80046-Q","url":null,"abstract":"<div><p>The results of anaerobic digestion in a fluidized bed reactor fed with municipal waste waters enriched with glucose are presented. Several process conditions have been tested by varying the influent chemical oxygen demand (COD) from 4 to 13 kg m<sup>−3</sup> and the residence time from 5.0 to 68.2 h. The degradation efficiency and methane production rate are substantially affected by an increase in organic loading rate from 4 to 24 kgCOD<sub>i</sub> m<sup>−3</sup> day<sup>−1</sup>, suggesting a maximum operational value for this parameter. Using a Monod-type kinetic model, a maximum theoretical specific degradation rate of 1.76 kgCOD<sub>r</sub> kgVSS<sup>−1</sup> day<sup>−1</sup> has been calculated, which is very similar to values calculated for other effluents from food industry activities.</p></div>","PeriodicalId":101225,"journal":{"name":"The Chemical Engineering Journal","volume":"52 1","pages":"Pages B21-B28"},"PeriodicalIF":0.0,"publicationDate":"1993-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0300-9467(93)80046-Q","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53642019","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
Slugging fluidized beds in tapered vessels 锥形容器中的段塞流化床
The Chemical Engineering Journal Pub Date : 1993-08-01 DOI: 10.1016/0300-9467(93)80055-S
Toshiro Maruyama, Toshio Koyanagi
{"title":"Slugging fluidized beds in tapered vessels","authors":"Toshiro Maruyama,&nbsp;Toshio Koyanagi","doi":"10.1016/0300-9467(93)80055-S","DOIUrl":"10.1016/0300-9467(93)80055-S","url":null,"abstract":"<div><p>The bed height and pressure drop of a tapered fluidized bed were well predicted by a model based on measurements for slugging fluidized beds in the fast bubble regime. Tapered vessels of large apex angle were effective in suppressing the development of square-nosed slugs.</p></div>","PeriodicalId":101225,"journal":{"name":"The Chemical Engineering Journal","volume":"52 2","pages":"Pages 99-103"},"PeriodicalIF":0.0,"publicationDate":"1993-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0300-9467(93)80055-S","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53642114","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
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