Objective
THE OBJECTIVE IS TO DESIGN A NEW TYPE OF ABSORBERS-REACTORS, TO BUILD EXPERIMENTAL MODELS, TO TEST THEM AT A PILOT SCALE, IN THE CHEMICAL ENGINEERING LABORATORY, AND TO ASSESS THEIR ECONOMIC FEASIBILITY, AS COMPARED TO CONVENTIONAL SYSTEMS. DUE TO A BETTER CONTROL OF THE TEMPERATURE PROFILE ALONG THE ABSORBER, THE ENERGY EFFICIENCY OF THE ABSORBER WILL BE STRONGLY IMPROVED.
APPARATUS PRINCIPLE :
THE GAS LIQUID ABSORBER WILL BE MADE OF A VERTICAL CYLINDRICAL COLUMN IN WHICH IS PLACED A BUNDLE OF HOLLOW VERTICAL FINS. A HEAT CARRIER FLUID FLOWS IN THE FINS TO EXTRACT THE REACTION HEAT. BETWEEN THE FINS ARE INSERTED POROUS "PACKINGS" MADE OF PILES OF CORRUGATED PUNCHED METAL SHEETS. A LIQUID DISTRIBUTOR, PUT ON THE TOP, UNIFORMLY SPRINKLES THIS POROUS PACKING, WITH THE ABSORBING LIQUID.
THE WORK WILL INCLUDE FOUR PARTS :
1.- MODELLING AND OPTIMIZATION :
THE OPTIMIZED POROUS PACKING SHOULD RESULT FROM THE BEST COMPROMISE BETWEEN THE FOLLOWING CHARACTERISTICS :
. GOOD HORIZONTAL CONDUCTANCE FOR HEAT
. GOOD VERTICAL PERMEABILITY FOR THE STREAMING LIQUID FILM
. GOOD HORIZONTAL PERMEABILITY FOR THE ABSORBABLE GAS
. GOOD EFFICIENCY AS A TURBULENCE PROMOTER
. GOOD MECHANICAL RIGIDITY
2.- CONSTRUCTION OF A NUMBER OF EXPERIMENTAL MODEL :
IT WILL BE MADE BY THE "TREFIMETAUX" COMPANY, WITH VARIOUS DIMENSIONS OF THE HOLLOW FINS AND OF THE METALLIC POROUS MATRICES.
3.- EXPERIMENTATION :
THE BATTERIES OF HOLLOW FINS WITH THEIR INSERTED POROUS MATRICES WILL BE TESTED IN A VAPOUR/LIQUID ABSORPTION UNIT ALREADY IN USED IN THE LABORATORY. THE ENTHALPY AND ENERGY BALANCES WILL BE SPECIALLY MEASURED. THE EFFICIENCY OF EACH SYSTEM WILL BE EXPRESSED WITH THE DIMENSIONLESS RATIO : ENERGY CONSUMPTION PER UNIT OF HEAT TRANSFER.
4.- APPLICATIONS - ROUGH ESTIMATION OF ECONOMIC FEASIBILITY :
THREE MAIN TYPES OF APPLICATIONS WILL BE STUDIED :
. ABSORPTION OF H2O IN LIBR SOLUTION, AND OF NH3 IN WATER FOR ABSORPTION HEAT PUMP,
. SULFONATION OF ORGANIC COMPOUND IN A PARTIALLY ADIABATIC ABSORBER,
. COUNTER-CURRENT GAS ABSORBER COLUMN, FOR ABSORPTION OF DILUTE VAPOURS.
. THIS NEW TECHNOLOGY SHOULD LEAD TO MODULATED UNITS, EASY AND CHEAP TO BUILD AND ASSEMBLE IN LARGE SERIES.
Fields of science
Programme(s)
Topic(s)
Data not availableCall for proposal
Data not availableFunding Scheme
CSC - Cost-sharing contractsCoordinator
54042 Nancy
France