Measurement of effective specific heat of packed bed materials by the continuous flow electrical method

Pramana ◽  
1974 ◽  
Vol 3 (6) ◽  
pp. 383-389
Author(s):  
P B Lal Chaurasia ◽  
D R Chaudhary ◽  
R C Bhandari
Keyword(s):  
Specific Heat ◽  
Continuous Flow ◽  
Packed Bed ◽  
Electrical Method ◽  
Effective Specific Heat ◽  
Bed Materials

Design of a continuous flow immobilized-cell reactor for biosynthetical production of L-aspartic acid

1985 ◽  
Vol 50 (10) ◽  
pp. 2122-2133 ◽  
Author(s):  
Jindřich Zahradník ◽  
Marie Fialová ◽  
Jan Škoda ◽  
Helena Škodová
Keyword(s):  
Aspartic Acid ◽  
Continuous Flow ◽  
Immobilized Cells ◽  
Scale Up ◽  
Fixed Bed ◽  
Packed Bed ◽  
Fixed Bed Reactor ◽  
Experimental Program ◽  
Design Parameters ◽  
Immobilized Cell

An experimental study was carried out aimed at establishing a data base for an optimum design of a continuous flow fixed-bed reactor for biotransformation of ammonium fumarate to L-aspartic acid catalyzed by immobilized cells of the strain Escherichia alcalescens dispar group. The experimental program included studies of the effect of reactor geometry, catalytic particle size, and packed bed arrangement on reactor hydrodynamics and on the rate of substrate conversion. An expression for the effective reaction rate was derived including the effect of mass transfer and conditions of the safe conversion-data scale-up were defined. Suggestions for the design of a pilot plant reactor (100 t/year) were formulated and decisive design parameters of such reactor were estimated for several variants of problem formulation.

Designing continuous flow reaction of xylan hydrolysis for xylooligosaccharides production in packed-bed reactors using xylanase immobilized on methacrylic polymer-based supports

2018 ◽  
Vol 266 ◽  
pp. 249-258 ◽  
Author(s):  
Maria Romero-Fernández ◽  
Sonia Moreno-Perez ◽  
Alejandro H. Orrego ◽  
Sandro Martins de Oliveira ◽  
Ramón I. Santamaría ◽  
...  
Keyword(s):  
Continuous Flow ◽  
Packed Bed ◽  
Packed Bed Reactors ◽  
Xylan Hydrolysis ◽  
Flow Reaction

scholarly journals On the capacity for heat of water between the freezing and boiling points, together with a determination of the mechanical equivalent of heat in terms of the international electrical units.―Experiments by the continuous-flow method of calorimetry performed in the Macdonald Physical Laboratory of McGill University, Montreal

1901 ◽  
Vol 67 (435-441) ◽  
pp. 238-244 ◽  
Keyword(s):  
Specific Heat ◽  
Continuous Flow ◽  
Thermal Capacity ◽  
Boiling Points ◽  
Physical Laboratory ◽  
Complete Work ◽  
Different Temperatures ◽  
Mcgill University ◽  
Continuous Flow Method

At the Toronto meeting of the British Association in 1897, a new method of calorimetry was proposed by Professor Callendar and the author for the determination of the specific heat of a liquid in term of the international electrical units. At the Dover meeting ii September, 1899, some of the general results obtained with the method for water over a part of the range between 0° and 100 were communicated, with a general discussion of the bearing of the experiments to the work of other observers. In the present paper the author gives a summary of the complete work, in the case of water, to determine the thermal capacity at different temperatures between the freezing and boiling points.

A Comparison of Input Data Used to Represent Phase Transformations during the Quenching of a Large Nuclear Forging

2016 ◽  
Vol 716 ◽  
pp. 555-565
Author(s):  
Michael P. Howson ◽  
Bradley P. Wynne ◽  
Peter S. Davies ◽  
Sinan S. Al-Bermani ◽  
Jesus Talamantes-Silva
Keyword(s):  
Specific Heat ◽  
Latent Heat ◽  
Lower Bainite ◽  
Cooling Curve ◽  
Model Parameters ◽  
Cooling Curves ◽  
Scanning Calorimetry ◽  
Effective Specific Heat ◽  
Input Variables ◽  
Predictive Software

The present work explores the importance of model parameters and input variables when simulating the quenching of thick sectioned nuclear forgings. The modelling approach adopted uses values of specific heat capacity, containing latent heat release, to simulate cooling curves; rather than calculating transformation kinetics based upon a mathematical model. Termed the effective specific heat (Cpeff), two different methods were used to establish values: differential scanning calorimetry (DSC) and thermos dynamic predictive software. Values were then included in finite element (FE) models to simulate the characteristic cooling at the mid-wall position in a thick section forging and were validated against production thermocouple data. The investigation found that the formation of ferrite, bainite and martensite or lower bainite were all represented by the data established using DSC and critical formation temperatures were comparable with others in the literature. Conversely, values calculated using the thermodynamic software failed to represent ferrite formation and predicted different critical transformation temperatures for bainite. The simulated cooling curve that used the software predicted Cpeff data was comparable to the thermocouple data either side of the bainite transformation, however during the transformation the effects of latent heat on cooling rate were over predicting leading to disparities. The equivalent DSC cooling curves produced a near exact match.

Rapid synthesis of propyl caffeate in ionic liquid using a packed bed enzyme microreactor under continuous-flow conditions

2013 ◽  
Vol 149 ◽  
pp. 367-374 ◽  
Author(s):  
Jun Wang ◽  
Shuang-Shuang Gu ◽  
Hong-Sheng Cui ◽  
Liu-Qing Yang ◽  
Xiang-Yang Wu
Keyword(s):  
Ionic Liquid ◽  
Continuous Flow ◽  
Packed Bed ◽  
Flow Conditions ◽  
Rapid Synthesis
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