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Journal ArticleDOI

Thermoanalytische methoden in der chemischen verfahrensentwicklung

01 Jul 1977-Thermochimica Acta (Elsevier)-Vol. 20, Iss: 1, pp 65-79
TL;DR: In this paper, a survey of methods and instruments for heat-flow calorimeter is given, and a new Bench Scale Heat-Flow Calorimeter (BSF) is presented.
About: This article is published in Thermochimica Acta.The article was published on 1977-07-01. It has received 33 citations till now. The article focuses on the topics: Calorimeter.
Citations
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Book ChapterDOI
TL;DR: In this paper, a short review of the development of biological calorimetry and a discussion of the instrumentation and the measuring principles that have been applied to study heat generation by microbial cultures and other cellular systems is presented.
Abstract: After a short review of the development of biological calorimetry and a discussion of the instrumentation and the measuring principles that have been applied to study heat generation by microbial cultures and other cellular systems, this article demonstrates how heat evolution depends on growth, biomass yield, maintenance metabolism, nature of substrate, energetic efficiency of growth, oxygen uptake, and product formation. Theoretical considerations are used together with experimental evidence to explain the nature of these relationships and the underlying reasons. The possibilities of exploiting these relationships in order to gain information on any of the above factors by applying calorimetric measurements to biotechnology have been emphasized and developed throughout this paper.

95 citations

Journal ArticleDOI
TL;DR: In this article, a review of the literature on calorimetric measurements carried out in the laboratory under conditions closely resembling those maintained in industrial reactors is presented, followed by a description of a few examples of the results obtained.

70 citations

Journal ArticleDOI
TL;DR: In this paper, the power consumption of an impeller in a stirred tank as well as the inside film heat transfer coefficient was determined for turbine, Pfaudler and anchor impellers.

53 citations

Journal ArticleDOI
TL;DR: In this paper, the authors present a review of the available calorimeter equipment for the measurement of heat effects in chemical and physical processes, and present a new data treatment system for a commercial bench scale isothermal reaction calorometer.

48 citations

Journal ArticleDOI
TL;DR: A proportional control using the ratio of carbon dioxide evolution rate to heat production resulted in high biomass yields and minimal ethanol production and for the special case where the carbon source contains no nitrogen, biomass production estimated from heat measurements agreed well with measured values.
Abstract: Measurements of the heat produced by Saccharomyces cerevisiae CBS 426 were used in conjunction with elemental and enthalpic balances to control fed-batch fermentations. A proportional control using the ratio of carbon dioxide evolution rate to heat production resulted in high biomass yields and minimal ethanol production. For the special case where the carbon source contains no nitrogen, biomass production estimated from heat measurements agreed well with measured values. When the controller gain was set below the maximum specific cellular growth rate, stable control was achieved, even in response to large upsets in feed concentrations.

40 citations

References
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Journal ArticleDOI
TL;DR: In this paper, a vielseitig and bequem benutzbares Gerat wurde bereits in Teil I vorgestellt, den Hydrolyse des Acetanhydrids and Adsorption von Methylacrylat-Dampf an Aktivkohle.
Abstract: Zur Messung von Reaktionsenthalpien sind vor allem die adiabatische Reaktionskalorimetrie und die Verbrennungskalorimetrie bekannt. Eine weitere Methode ist die isotherme Kalorimetrie. Sie hat den Vorzug der technologisch so wichtigen kalorischen und kinetischen Mesbarkeit auch langdauernder Reaktionen. Ein vielseitig und bequem benutzbares Gerat wurde bereits in Teil I vorgestellt. Als Beispiele fur Messungen werden nun beschrieben (1.) die Hydrolyse des Acetanhydrids und (2.) die Adsorption von Methylacrylat-Dampf an Aktivkohle. Beim zweiten Beispiel ergibt sich die Reaktionsenthalpie in der ublichen Weise, namlich als Zeitintegral der registrierten Leistung, wahrend im ersten Fall die Auswertung auf der Kinetik beruht und damit vollig anders ist.

14 citations

Journal ArticleDOI

7 citations