Isotherme Kalorimetrie mit automatisch gesteuerter Peltier-Kühlung und fortlaufender Integration der Kompensationsleistung

Becker, Friedrich; Walisch, Walter

doi:10.1524/zpch.1965.46.5_6.279

Cited by 25 publications

(15 citation statements)

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“…It often serves as a model reaction for calorimetry and has been thoroughly studied in literature, with the enthalpy and kinetics well known. [45][46][47][48][49][50] The synthesis can be performed as a single-or two-phase reaction as Ac 2 O is partially miscible with water. To ensure a single-phase reaction the miscibility can be improved by increasing the reaction temperature and by adding AcOH to the starting solution.…”

Section: Hydrolysis Of Acetic Anhydridementioning

confidence: 99%

“…Enthalpies reported in literature range between −57 and −65 kJ mol −1 and in most cases refer to combined reaction enthalpy and the heat of mixing, and reactions performed in presence of HCl. 45,[47][48][49][50] Studies separating the two values are…”

Section: Hydrolysis Of Acetic Anhydridementioning

confidence: 99%

“…Zogg et al (2003) report heat of mixing values increasing from −3 to +3 kJ mol −1 at 25°C and 55°C respectively in a batch reaction catalysed by 0.1 M HCl. 45 Becker and Walisch (1965) determined heat of mixing of −4.25 kJ mol −1 at room temperature, also in presence of 0.1 M HCl. 47 Fritzler et al…”

Section: Reaction Chemistry and Engineering Papermentioning

confidence: 99%

“…45 Becker and Walisch (1965) determined heat of mixing of −4.25 kJ mol −1 at room temperature, also in presence of 0.1 M HCl. 47 Fritzler et al…”

Section: Reaction Chemistry and Engineering Papermentioning

confidence: 99%

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Characterization of reaction enthalpy and kinetics in a microscale flow platform

2020

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Section: Hydrolysis Of Acetic Anhydridementioning

confidence: 99%

Section: Hydrolysis Of Acetic Anhydridementioning

confidence: 99%

Section: Reaction Chemistry and Engineering Papermentioning

confidence: 99%

“…45 Becker and Walisch (1965) determined heat of mixing of −4.25 kJ mol −1 at room temperature, also in presence of 0.1 M HCl. 47 Fritzler et al…”

Section: Reaction Chemistry and Engineering Papermentioning

confidence: 99%

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Characterization of reaction enthalpy and kinetics in a microscale flow platform

2020

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“…Important systematic work towards modern active heat flow calorimetry was done in the sixties by Becker and coworkers [10] in Germany.…”

Section: Short History Of Heat Flow Calorimetry and Overview Of Past mentioning

confidence: 99%

The development of heat flow calorimetry as a tool for process optimization and process safety

Regenass¹

1997

Journal of Thermal Analysis

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Classical thermo-analytical micro methods (IYrA, DSC) are still very useful for process work, but medium scale instruments based on heat flow measurement are attaining an increasingly important role in this domain. As in many areas, development of reaction calorimetry for industrial applications was driven by needs and by available means (technical capabilities). The needs have been fairly constant over the past decades. There are data needs: Simulation of industrial mixing conditionsThe main driving force for the development of process oriented calorimetric instruments was the evolution of electronic hardware which made the control of heat flow on a (non micro) laboratory scale easy. The paper gives an overview on the principles of heat flow control and reviews the developments of the fifties and sixties, when the matching of heat flow with heat release by reactions was the goal. With the advent of fast and powerful laptop computers, the focus has shifted. Now, the deduction of true heat release rates from signals which may be badly distorted, is the goal. Some recem developments are reviewed and the hope is expressed that calorimetric equipment, inexpensive enough to be affordable for every laboratory engaged in process work, will be available soon.

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Thermokinetische Meßmethoden

Becker

1968

Chemie Ingenieur Technik

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In dieser Ubersicht iiber die gegenwartig verfiigbaren thermokinetischen MeRmethoden werden alle diejenigen kinetischen Verfahren zusammengefaBt, bei denen die Warmeerzeugung einer Reaktion als MaR fiir den Umsatz dient. Bei der Diskussion der theoretischen Grundlagen wird besonders auf die Moglichkeiten zur graphischen Losung kinetischer Differentialgleichungen eingegangen. Gegliedert nach den verwendeten calorimetrischen Arbeitsweisen werden fur die verschiedenen Methoden die charakteristischen Merkmale sowie die Vor-und Nachteile herausgestellt. Typische Versuchsbeispiele sollen eine Beurteilung der Leistungsfahigkeit und der Anwendungsmoglichkeiten thermokinetischer Menmethoden erlauben, die hinsichtlich ihrer Vielseitigkeit, Genauigkeit und Empfindlichkeit eine wertvolle Bereicherung der gebrauchlichen physikalischen Methoden in der chemischen Reaktionskinetik darstellen. Prinzipien thermokinetischer MessungenMit dem Begriff ,,Thermokinetik" werden physikalische Methoden zur Verfolgung des zeitlichen Ablaufes chemischer Reaktionen bezeichnet, bei denen die Warmeerzeugung als MaR fur den Umsatz dient. Grundlage ist die Proportionalitat zwischen der Reaktionsgeschwindigkeit dxldt [mol 1-' s-l] und der thermischen Reaktionsleistung dQR/dt [W] oder zwischen der Konzentration x [mol l-'] des gebildeten Reaktionspro-

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Isotherme Kalorimetrie mit automatisch gesteuerter Peltier-Kühlung und fortlaufender Integration der Kompensationsleistung

Cited by 25 publications

References 0 publications

Characterization of reaction enthalpy and kinetics in a microscale flow platform

Characterization of reaction enthalpy and kinetics in a microscale flow platform

The development of heat flow calorimetry as a tool for process optimization and process safety

Thermokinetische Meßmethoden

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