The Sustainability of CCS - Richard Darton at the Alternative CCS Pathways Workshop, Oxford Martin School, 26 June 2014

Presentation given by Richard Darton of the University of Oxford on "The Sustainability of CCS" at the Alternative CCS Pathways Workshop, Oxford Martin School, 26 June 2014

Engineering

Human activity-related CO2 emissions: around 80 million tpd
or 1 million tons every 18 minutes.
15 million tons of CO2 are photosynthesised every 18 minutes
Fossil fuels produce waste at a
massive rate
2

The location of stationary
CO2 emission sources
~8000 sources produce ~15 bn tpy
IEA, IPCC
Carbon Capture
3

We might capture 15
bn tpy in 8000 plants
at a capital cost of
around $US 1 trillion –
this treats all large
stationary sources of
CO2.
CO2 from flue gas: 70 000 tpy plant, Malaysia
Carbon Capture
4

Tertiary amines can
absorb H2S and CO2
Demonstrated by pilot
plant in Germany,
methyldiethanolamine
(MDEA) is now a widely
applied solvent
Eg used at Sleipner The natural gas plant at Grossenkneten in
Lower Saxony treats 6.5 bn m3/y.
850 000 t/y sulphur removed by amine
solvents.
Amine treating: A Shell project (1975)
5

If we capture all 15 bn tpy CO2 from stationary sources, and compress to critical point
(73.82 bar) we obtain 32.1 bn m3, which is a cube of side 3.2 km.
Current world oil production is 3.88 bn tpy, equivalent to 4.52 bn m3, a cube of side
1.65 km.
By volume, CCS is potentially a larger industry than the oil business.
CCS – size of the industry
CO2
Vc = 0.00214 m3/kg
Tc = 31.1 oC
Pc = 7.382 MPa
University of Ohio
Carbon Capture
6

What does the public think of
storing CO2 underground?
Some are not keen at all.
Carbon Capture
7

Joseph Stiglitz
“What we measure affects what we do... If we use the
wrong measures we will strive for the wrong things.”
Joseph Stiglitz
Nobel laureate, Former Chief Economist, World Bank
Environment
Economics
Society
8

Sustainability measurement –
main steps
• Designing a framework
Systemic, hierarchical, logical, communicable
• Choosing indicators for each component
• Generating indices by weighting and aggregation
• Identifying priority issues and policy options
Source:
Dalal-Clayton and Bass
Sustainable Development Strategies, Earthscan, 2002
See also:
Global Reporting Initiative, G3 guidelines, from
https://www.globalreporting.org/
Handbook on Constructing Composite Indicators, OECD
http://www.oecd.org/std/42495745.pdf
9

The Process Analysis Method
PAM
Process Impact Issues Indicators
External Impact Receivers
causes creates described
by
changing
affecting
Metrics
The triple bottom line
10
Chee Tahir, A.C. and Darton, RC. (2010) The process analysis method of selecting indicators to quantify the
sustainability performance of a business operation. J. Cleaner Production 18: 1598-1607.

The Process Analysis Method
PAM
PAM case studies
• Palm oil fruit production
• UK motor car fleet (distributed
service provision)
• Arsenic mitigation in Bengal
• Yellow River management system
• Geoengineering
11

Summing up…
• CCS could become a really large
industry
• Its impact would be large
• We need credible, holistic
sustainability assessment
• Geoengineering (a technological
imaginary) also needs assessing
(IAGP)
12

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