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LIST
OF CONTENTS
Introduction
Process Description
Typical
Contactor
Design
Criteria
Photos, Plans & Specs
Treatment
Performance
Operational
Skills
Automation
Potential
Advantages
Limitations
& Concerns
Pilot
Plant Objectives
Costs
References
Contacts & Facilities
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PROCESS DESCRIPTION - CONTINUED
(D) MODELING THE SSP AND SIMPLIFIED SSP
The dissolution of gaseous CO2 into the
aqueous phase depends on the relative CO2
concentration in the two phases, surface area at the gas / liquid
interface and mixing energy within the aqueous phase (De Souza
et al., 2000). In addition, the temperature, pressure and ionic
strength of the system also play important roles in the CO2
dissolution. The recovery of excess dissolved CO2
from the aqueous phase is affected by the difference in CO2
concentration in the aqueous and gaseous phases, the surface area
at the gas / liquid interface and pressure of the system.
PRO/II
(manufactured and distributed by Simulation Sciences, Inc.) was
initially selected by CSIR to model the SSP (De Souza et al.,
2000). It modeled unit processes involved in the SSP such as feed
generation, CO2 addition/dissolution and
CaCO3 addition/dissolution but not the
CO2 stripping from the sidestream. Another
model was later developed called SSP-MOD program. This program
was developed from a model used to describe the Simplified SSP.
However, unlike the Simplified SSP, STASOFT 4 and WATCHEM cannot
be used to model the SSP since they do not provide a mechanism
for gas recycling. Therefore, JAVA was used to develop modules
that model the various unit operations (such as CO2
stripping, recovery and subsequent recycling) and a steady state
mass balance in the SSP. The SSP-MOD program allows multiple runs
using multiple input ranges and produce output that can be exported
to MSExcel for graphical representation.
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