Falling film reactor modelling for sulfonation reactions

2019 ◽  
Vol 377 ◽  
pp. 120464 ◽  
Author(s):  
Vincenzo Russo ◽  
Antonio Milicia ◽  
Martino Di Serio ◽  
Riccardo Tesser
Keyword(s):  
Falling Film ◽  
Film Reactor

Heat transfer characteristics of molten plastics in a vertical falling film reactor

2019 ◽  
Vol 27 (5) ◽  
pp. 1015-1020 ◽  
Author(s):  
Zechen Jin ◽  
Lijie Yin ◽  
Dezhen Chen ◽  
Yuanjie Jia ◽  
Jun Yuan ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Falling Film ◽  
Heat Transfer Characteristics ◽  
Transfer Characteristics ◽  
Film Reactor

scholarly journals Photonic contacting of gas–liquid phases in a falling film microreactor for continuous-flow photochemical catalysis with visible light

2016 ◽  
Vol 1 (6) ◽  
pp. 636-648 ◽  
Author(s):  
Thomas H. Rehm ◽  
Sylvain Gros ◽  
Patrick Löb ◽  
Albert Renken
Keyword(s):  
Visible Light ◽  
Process Evaluation ◽  
Continuous Flow ◽  
Falling Film ◽  
Dye Sensitized ◽  
Photochemical Conversion ◽  
Liquid Phases ◽  
Film Reactor ◽  
Photochemical Catalysis

A microstructured falling film reactor was applied to the dye-sensitized photochemical conversion of 1,5-dihydroxynaphthalene to juglone for reactor and process evaluation.

The photocatalytic oxidation of low concentration MTBE on titanium dioxide from groundwater in a falling film reactor

2003 ◽  
Vol 22 (1) ◽  
pp. 14-23 ◽  
Author(s):  
Catherine B. Almquist ◽  
Endalkachew Sahle-Demessie ◽  
Julius Enriquez ◽  
Pratim Biswas
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Oxidation ◽  
Falling Film ◽  
Low Concentration ◽  
Film Reactor

Characterisation of liquid film in a microstructured falling film reactor using laser scanning confocal microscopy

2006 ◽  
Vol 30 (5) ◽  
pp. 463-472 ◽  
Author(s):  
Kay Kin Yeong ◽  
Asterios Gavriilidis ◽  
Ralf Zapf ◽  
Hans-Joachim Kost ◽  
Volker Hessel ◽  
...  
Keyword(s):  
Confocal Microscopy ◽  
Liquid Film ◽  
Laser Scanning ◽  
Laser Scanning Confocal Microscopy ◽  
Falling Film ◽  
Scanning Confocal Microscopy ◽  
Film Reactor

Waste Water Reuse by Freeze Concentration with a Falling Film Reactor

1992 ◽  
Vol 26 (7-8) ◽  
pp. 1475-1482 ◽  
Author(s):  
M. Müller ◽  
I. Sekoulov
Keyword(s):  
Waste Water ◽  
Aqueous Phase ◽  
Water Reuse ◽  
Pure Water ◽  
Municipal Waste ◽  
Falling Film ◽  
Freeze Concentration ◽  
Ice Films ◽  
Film Reactor ◽  
Inorganic Solutes

Experiments with a falling film reactor were conducted to examine the potential of the freeze concentration to reuse municipal waste water. The waste water was recycled in the falling film reactor while ice films were frozen on the cooled inner walls. Pure water was removed from the solution by crystallization, and the liquor was concentrated. Finally, the separated clear ice was melted. Various parameters such as conduction, TOC, COD and NH4-N of the melted ice and waste water concentrate were measured. A clearance efficiency up to 99% was observed for municipal waste water and 91% for high concentrated waste water. In addition, particulate solutions were removed from the aqueous phase as efficiently as the organic and inorganic solutes.

Mathematical Model of a Falling Film Reactor for Methyl Ester Sulfonation

2009 ◽  
Vol 4 (5) ◽  
Author(s):  
Jesús Alfonso Torres Ortega ◽  
Giovanni Morales Medina ◽  
Oscar Yesid Suárez Palacios ◽  
Francisco José Sánchez Castellanos
Keyword(s):  
Mathematical Model ◽  
Mass Transfer ◽  
Methyl Ester ◽  
Sulfur Trioxide ◽  
Film Theory ◽  
Falling Film ◽  
Concentration Gradients ◽  
Axial Temperature ◽  
Pilot Plant Scale ◽  
Film Reactor

Methyl ester sulfonation with sulfur trioxide derived from oleum is possible under special conditions on a pilot plant scale. Quantum chemical calculations were used to study the relative stability between intermediates in the proposed mechanism. In this report an analysis of a mathematical model for a falling film sulfonation reactor is presented. It aims to estimate the temperature and conversion profiles of the thin film. The model treats the heat released and the trioxide sulfur dissolution assuming that the film theory is applicable. The temperature and concentration gradients can exist across the film during the chemical reaction. The equations were solved using finite differences. The most important data obtained by the mathematical model for a subsequent correlation with the properties of the reagents and product are the conversion, the density and viscosity of the sulfonic product. The results indicate an increase in the axial temperature of the liquid film and the conversion from the top reactor in accordance with the experimental results. It considers that at the upper section of the reactor the reaction is controlled by means of mass transfer due to gas phase turbulence. A mild conversion on the reactor bottom means that the liquid phase controls the mass transfer due to the amounts of sulfur trioxide transferred into the film which produces changes in the film composition.

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