Carbon Sequestration and CTL Technology in West Virginia
West Virginia GIS Technical CenterEvan Fedorko
Outline
• Fischer-Tropsch CTL• Spatial data development• Sequestration inquiry tool development• http://www.WVCarb.org• Site Rating Model development
Fischer-Tropsch CTL
• Aka, coal liquefaction, coal to liquids, CTL synfuels, etc. Two primary methods:
ONE:TWO:
Data Development
• Infrastructure Data• Sequestration Data– Source: WVGES
• Sequestration potential per unit area• Will be implemented into NatCarb.org
CTL Infrastructure Requirements
• Standard stuff: electricity, roads, coal supply, etc.
• Water, water, water! $$$ to move!• Carbon sequestration proximity. $$$ to move!• Existing pipelines.
Natural Gas Sequestration
Deep Coal Sequestration
Sequestration Per Unit Area
• Source data: shapefile polygons – blobs with a number attribute of capacity
• At a specific point…• How much carbon dioxide
can be sequestered within X distance?
• Problems!
Sequestration Per Unit Area
• To develop this tool, we must undergo raster conversion.
• Total sequestration (metric tons) must be converted to:
• Metric tons PER 90m pixel• S per 90m = sequestration/(area sq. m/8100)• 90 meter pixels result in values within ~2% of
actual.
Tool Development
• Data development has been driven by the need to answer this question:
• “How much carbon can we put in the ground within 10 miles of THIS point?”
Sequestration Explorer
Ratings Development
• Goal: To rate (1-100) sites in West Virginia for their suitability to host a CTL facility.
• Model will be scripted, repeatable, and variables can vary as necessary.
• Model is constructed around weighted distance decay functions.– Carbon sequestration decays by distance, volume
and economic value.– Infrastructure decays by distance and cost.
Ratings Development
• Rating sequestration “neighborhoods”• Option 1: given a need for a predetermined amount of sequestration, what size neighborhood do we need?• Use radius in a distance decay function• Difficult to calculate• Statistically over-values sequestration variables
Radius = ?
Radius = ?
• Option 2: given a need for a predetermined amount of sequestration (10 years of CTL production), and several neighborhood sizes (1, 5, 10, 20 miles), which sites offer the MOST sequestration in the SMALLEST neighborhood?
R = 1, 5, 10, 20 miles
Q = ?
Ratings Development
• Sequestration
• can be retrieved with an existing GIS function, neighborhood analysis, focal statistics. Calculates a sum within a neighborhood.– Somewhat resource intensive to calculate
X = cost per mileZ = oil > coal > gas
• Infrastructure
• Sequestration
X = cost per mileZ = oil > coal > gas
Ratings Development
Ratings Development
• Final ratings equation, sum of all weights:
D-R-A-F-T
Future Work
• Inclusion of a “click and rate” tool for potential CTL sites
• Model refinement• New research into distance metrics for
sequestration• “New energy economy” data clearinghouse
Summary
• We discussed:– Spatial data development– Sequestration inquiry tool development– http://www.WVCarb.org – Site Rating Model development
Questions?
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