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Acid Plant Database  January 11, 2020

Owner SaskPower

Location Boundary Dam Power Station
Estevan, Saskatchewan
Background -
Website www.saskpower.com 
Plant Boulder Dam Power Station
Coordinates* 49° 5' 47" N, 103° 2' 1" W (Site)
Type of Plant Metallurgical
Gas Source SO2 from Cansolv unit
Plant Capacity 60 MTPD
Emissions N/A
Status -
Year Built 2013
Technology MECS
Contractor SNC Lavalin
Remarks Cansolv Unit
General The total cost of the project is estimated to be $1.24 billion. The Boundary Dam project received $240 million from the federal government in 2011, of which about $180 million has already been spent. The provincial government is also supporting the project. Saskpower announced in October 2013 that the project was $115 million over budget.  Revenue from the sale of CO2 is expected to offset the project costs. Sulphur dioxide (SO2) will also be captured and sold.The retrofit is located at Boundary Dam's Unit 3. The project will capture 95% or 1Mt/yr. This project has been re-sized from an earlier plant to build a 300 MW clean coal facility near Estevan which had been shelved by the previous provincial government because of its escalating cost ($1.5 billion to $3.8 billion). This smaller scale project has occurred after the federal government gave the province $240 million.There are no other energy sources nearby so power generation from coal is the only option. There are a few nearby lignite mines, which reduces the cost of transportation to the plant. There is a SOX capture unit which will produce 93% sulphuric acid for sale.  In addition 35% of the fly ash will be sold for construction.
References -
January 11, 2020 - The Carbon Capture and Storage facility at Boundary Dam Power Station outside of Estevan returned to service on December 7 after its scheduled outage was reported in November.In the month of December, the facility captured over 57.5 tonnes of carbon dioxide for a total surpassing 616,000  tonnes captured for 2019 as a whole.The average daily capture rate in December was 2,504 tonnes per day with a peak one-day capture rate of 2,863 tonnes.Their acid plant at the facility also returned to service in late December and produced 104 tonnes of sulfuric acid.SaskPower looks forward to continuing carbon capture in 2020. 

September 9, 2016
- The carbon capture and storage (CCS) project at SaskPower’s Boundary Dam Power Station underwent maintenance in August, and it was online for a little more than half of the month.  “This is not unusual for power units, but it did impact monthly capture totals,” SaskPower stated in its monthly report for the CCS facility.  Planned maintenance for inspection and cleaning also occurred later in the month, and was more extensive than originally planned. As a result, the outage lasted approximately 10 days.  The CCS plant was able to capture 38,679 tonnes of carbon dioxide, which was below the 12-month average of 50,418 tonnes captured. The amount of carbon dioxide captured was about 39 per cent of maximum capacity.  SaskPower remains on track to capture 800,000 tonnes in 2016, and continues to meet emission regulations and the needs of Cenovus, which purchases the captured CO2 from SaskPower.  “Boundary Dam Unit 3 is currently the cleanest fossil fuel power unit in the country,” SaskPower said in the report.  Also in August, the daily average for CO2 captured at the plant peaked at 2,645 tonnes, which was above the 12-month average 2,116 tonnes.  More than 1,067,000 tonnes have been captured at the plant since it started operations in October 2014.  The CCS process was online for 52 per cent of the month in August, which is beneath the 12-month average of 66 per cent.  The totals for the tonnes of CO2 captured and the total operating time represented the lowest monthly totals since October 2015, when the plant was shut down for the entire month due to maintenance projects.  The monthly average for power produced was 100 megawatts, which was slightly lower than the 12-month average of 101 megawatts.  No maintenance is planned for September.  The sulphur dioxide/sulphuric acid portion of the process is now commissioned and continues to produce sulphuric acid from captured sulphur dioxide. This will be sold for water treatment and other industrial uses.

MTPD - Metric Tonne per Day           STPD - Short Ton per Day
MTPA - Metric Tonne per Annum      STPA - Short Ton per Annum
SA - Single Absorption
DA - Double Absorption

* Coordinates can be used to locate plant on Google Earth