E20-UOP08 - Gas/Liquid Absorption Study Unit

Product Dimensions
(L x W x H)
47in x 24in x 94.5 (120cm x 60cm x 240cm)
220 lbs. (100 kg) empty

Shipping Dimensions
(L x W x H)
52in x 29in x 98in (132cm x 73cm x 249cm)
260 lbs. (118 kg)

The absorption process, commonly used in gas scrubbing (as used with polluted discharge gases), uses a solvent to separate two gaseous components in counter-current flow within a packed column.

This realistic study and demonstration unit replicates the process at a convenient scale, while retaining, the ability to control the primary variables upon which the process is based.

Water is fed to the column head by variable positive displacement pump, while the gaseous mixture is injected at the base of the column. These two phases become mixed within the borosilicate glass packed column. In the process the solute (CO2), migrates from the gaseous phase to the liquid phase. Sample points and temperature sensors allow for monitoring of the transfer. A graduated receiver is used to measure the flow rate. The depleted gaseous phase can be directed to a vent network or to an analysis system through a 3-way valve.

The system is a manually controlled system. An emergency stop, ground-fault interruption, and provision for lock-out/tag-out are provided.
20L (21qt) polyethylene liquid feed tank.
Variable-speed, diaphragm-type, PVC metering feed pump.
Float-type (variable area) flow meter.
Accumulator (dampener), guaranteeing stable, steady feed flow.
System instrument air regulator and separator.
Air pressure reducing valve and SS needle valve.
Air float-type (variable area) flow meter.
Provision for attachment to user-supplied CO₂ source.
Solute (CO₂) controlling needle valve.
Solute float-type (variable area) flow meter.
Gas phase blending network including temperature indicator and sample point.
50mm (2") Borosilicate glass column with two primary packed segments, 500mm (20") long.
Intermediate column support plates incorporating sample connections, and PT 100 Ω temperature sensors.
Glass Raschig ring packing, 6mm x 6mm.
50mm (2") Glass column head with vent outlet, thermometer and liquid inlet sparger
Graduated u-tube manometer, measuring trans-column differential pressure.
Graduated u-tube manometer measuring total column head pressure.
Column sump/bottom tank with liquid seal, and 2L (2qt) calibrated receiver, with drain and sampling valves.
Polyethylene overflow tank, 20L (21qt).
The depleted gaseous phase is directed by 3-way valve to a user-supplied vent system or to graduated column for direct sampling or processing through a titration solution. A thermometer is provided.
Control and operating panel with an-board ground-fault system feed, pump control switch, primary power (mains) switch, and pilot lights.
Tubular stainless steel structure, with adjusting feet.
Packing for international shipment.
#UOP08-900 - One-Day, On-Site, "Train the Trainer" program including commissioning and one-on-one training.
•   PFD, and P&ID; diagrams (2 each).
•   Electric schematic.
•   Process components list, with reference manuals.
•   Seals list with order numbers.
•   Operating outline.
•   Troubleshooting manual.
•   Factory acceptance test certificate. (FAT)
•   Physical layout drawing with primary process circuits and devices indicated.
City (mains) water, instrument air source, CO2 Source (cartridge or cylinder), local vent system, 110 VAC, 20A electric source.
Primary operation and experiment outline:
•   Review of the distillation process P &ID;
•   Exploration of system and components
•   System preparation

Study the hydrodynamics of packed column:
•   Determine over flooding conditions
•   Determine packing factor

Study the absorption of CO2 in water:
•   Materials balance on the gaseous solute.
•   Determining the efficiency of the column by defining the HTU and NTU
•   Demonstrate the exothermic effect due to absorption.

Study the desorption by air of an ammonia or carbonated solution.

Technical data
•   Duration of experiment: 4 hours
•   Study air/water column hydrodynamics.
•   Study absorption of NH3 by water and CO2 by sodium hydroxide solution.

Hydrodynamics of column
•   Determine over flooding conditions
•   Define packing factor

Absorption / desorption
•   Assay of solute in each of the phases entering and leaving the column.
•   Determine yield.
•   Determine the efficiency of the column by defining the HTU and NTU.

DAC assumes no liability for use of this product, for any purpose other than for demonstration purposes, using water ion an educational setting.
In accordance with DAC’s established policy of continuous improvement, these specifications and product descriptions are subject to change without notice. This information is the latest technical information as of the time of viewing or printing.