Transcript Co2 sequestration and AJAX

Co2 sequestration and AJAX
atmospheric CO2
pre-1800 level: 270-280 ppm
(from ice cores)
- increase roughly matches amount, rate and isotopic ratio (13C,
12C) expected from burning “fossil” fuels (ancient organic
material)
http://scrippsco2.ucsd.edu/data/data.html
“Greenhouse” effect
- short-wavelength radiation from Sun absorbed by surface and re-emitted as
longer wavelength
- some is absorbed and sequentially re-emitted by CO2 in atmosphere except
in upper troposphere, where it leaves atmosphere
- increasing CO2 concentrations increase height of escape and serves to
increase atmospheric temperatures .
-increasing temperatures increase amount of H2O vapor, which also absorbs
infrared.
- increasing CO2 is expected to raise atmospheric temperatures and indirectly,
raise sea levels by expansion of volume and melting ice.
BBC
One solution:
decrease amount of CO2 emitted
geologic carbon sequestration
-capture and permanently store CO2 from major sources such as power
plants
- inject emissions into geologic formations via wells
- what physical and chemical changes occur to the formation when CO2 is
injected? [decrease porosity, create voids, fractures, etc]
chemical effects
- CO2 and water produces H2CO3 (carbonic acid)
- will dissolve some rocks (cave formation)
- may precipitate elsewhere
- CO2 properties vary with temperature and pressure
- this can be modeled
- also soluble in crude oil
- intend to use “sym.8” by Sienna Geodynamics
- funded by DOE (upcoming 2010-2013)
sym.8
General Water-rock Interaction and Reactive-Transport Simulator
“Using kinetic and thermodynamic reactions over discretized
spatial domain to model compositional and textural evolution
of sediments in geologic and engineering time scales”
-eventually, want to write an web-based interface to sym.8 (and
possibly other codes such as finite element) to :
- allow simple, GUI-based used
- allow operation on multiple computers transparently and seamlessly
- model entire CO2 geologic sequestration system for prediction and
monitoring
http://www.sienna-geodynamics.com/home/index.php
Expectations
1)
2)
3)
4)
understanding AJAX web applications
running simple programs and creating interfaces
displaying output
possibly running sym.8 using existing input and modifying selected
parameters
5) understanding purpose and some of the problems in geologic
carbon sequestration
see http://www.netl.doe.gov/technologies/carbon_seq/index.html
- Individual projects
- Presentations and report at end of semester