Lecture 03-22-2017 Flashcards
1
Q
CCS
A
Carbon capture and storage
2
Q
Explain CCS
A
CO2 molecules are separated from waste gasses, compressed, and injected underground into porous layers of rock and sand that are overlain by an impermeable rock cap.
3
Q
Drawbacks of CCS
A
- Expensive
- Requires 20% or 1/5 of total generated power.
- Seismic activity?
- Leaking CO2 can kill people (e.g., Lake Nyos Disaster); continuous monitoring
4
Q
__% of elec. in Sask. comes from coal.
A
50%!
5
Q
Boundary Dam
A
CCS project (2011) in Sask.
6
Q
Waste Injection Systems
A
2 - 3x most cost effective than surface disposal methods.
7
Q
Stratagraphic trap
A
An impermeable subterranean layer.
8
Q
Natural wastes
A
(e.g., subterranean brines)
9
Q
Waste injection wells in Sarnia
A
Injection well disposal of industrial waste between 1984 and 1985. Unmarked abandoned water wells played a factor in contamination from the injection wells.
