PROJECT SCOPE
This project is for a full front-end engineering design (FEED) for a carbon capture system that will capture CO2 from Unit #2 (816 MWe) at the Prairie State Generating Company’s (PSGC) Energy Campus in Marissa, IL. The capture facility is based on the KM CDR Process CO2 capture technology from Mitsubishi Heavy Industries (MHI) and will use the KS-21TM solvent.
Kiewit Corporation (Kiewit) and Sargent & Lundy (S&L) provided engineering services for the project. They provided: (1) detailed design for the OSBL; (2) ISBL and OSBL capital cost estimates; (3) operating and maintenance costs; and (4) aid in developing the overall procurement and construction timeline.
Mitsubishi Heavy Industries (MHI) provided the detailed design and engineering of the ISBL components for the carbon capture island, as well as providing the solvent used in the system. The carbon capture system being designed as part of this study is based MHI’s KM CDR Process™ CO2 capture technology using KS-21™. KS-21™ has several advantageous properties such as lower volatility and greater stability against degradation. Therefore, amine emissions have become lower because KS-21™ is more thermally stable, the Regenerator can be operated at a higher pressure which reduces the power required to drive the compressor.
PROJECT DESIGN BASIS
Site Characteristics
Location
See Figure 1.
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Figure 1. PSGC is located outside of Marissa in southern Illinois.
The following aerial view (Figure 2) shows the layout of PSGC outside of Marissa, IL at address 1739 New Marigold Rd., Marissa, IL 62257.
Figure 2. Aerial view of the Prairie State Generating Company campus.
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Topography
The site topographic information for the build location of the CO2 capture facility indicates the site is generally flat. The build location is shown in the map below in the red square (Figure 3). Currently the location of the CO2 capture facility is being used to produce agricultural products such as corn and soybeans. Prospective laydown areas are marked with in the light blue boxes on the map.
Figure 3. The build location is outlined in red.
Transportation Access
Three potential transportation routes were surveyed in May 2020. The roll-off locations that were analyzed were the Ingram Dock located on the Mississippi river in Dupo, IL; KPRD Dock located on the Kaskaskia River in Lenzburg, IL; and the Evansville Dock located on the Kaskaskia River in Evansville, IL.
Present conditions limit the following cargo dimensions (L x W x H) to be able to transport. See Figure 4. Mississippi River (Ingram dock)
58.18m [191ft.] x 14.00m [46ft.] x 3.96m [13ft.] See Figure 5. Kaskaskia River – KPRD Dock (Option 1)
58.18m [191ft.] x 14.00m [46ft.] x 4.88m [16ft.] *Height can increase by raising utility lines
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See Figure 6. Kaskaskia River – Evansville Dock (Option 2) 58.18m [191ft.] x 14.00m [46ft.] x 4.88m [16ft.]
PSGC
Figure 4. Route from Mississippi River (Ingram dock) to Proposed Site
PSGC
Figure 5. Route from Kaskaskia River (KPRD Dock (Option 1)) to Proposed Site
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PSGC
Figure 6. Route from Kaskaskia River (Evansville Dock (Option 2)) to Proposed Site
For transport throughout the United States of America, the maximum payload that can be transported along these routes is determined by the Department of Transportation and the local governing officials based on evaluation of loadings to be exerted on the roads and bridges. If any of the roads or bridges are deemed not suitable, minor adjustments will be made to the route. Prior to shipment of equipment a review of the routes will be performed to evaluate any changes that could have occurred to the route such as construction of roads or bridges or new, low-hanging lines being strung. If such changes are identified, minor adjustments will be made to the route.
Additionally, there are height limitations due to bridge crossings on the Kaskaskia River at 30 feet. The preliminary review of the transportation routes has noted low-hanging lines that will require modification.
Areas where there are high concentrations of low-hanging wires has been pinpointed. It will be assumed that all low lines can be raised and left live with the utility companies having the authority to decide whether they will want to shut down any lines in advance. It is assumed that any obstructions along the route (i.e., signs, poles, trees, etc.) can be moved or adjusted without any issues.
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