Critical Review of
"Life Cycle Assessment of Selected
Technologies for CO2 Transport and
Diploma Thesis No. 2007MS05 by
represented by Roberto Dones
Doka LCA Zürich
Zürich, September 2007
Review Carbon Sequestration Diploma Doka LCA, September 2007
The Diploma Thesis No. 2007MS05 by Caroline Wildbolz on "Life Cycle Assessment
of Selected Technologies for CO2 Transport and Sequestration" dated July 12, 2007
is reviewed, which comprises:
- verification of the calculations
- verification of the assumptions for average conditions in Europe
- verification of the key parameters
- editorial remarks to the text
Abridged review comments
The final report of the diploma thesis (MSWord) and calculations sheets (MSExcel)
were provided for the review. This allowed for a thorough checking of the figures. The
found mistakes are in part a result of a transparent documentation, and CW should
be commended for that.
More review comments are included in the MSWord-File of the diploma thesis.
DS means 'dataset'. CW indicates Caroline Wildbolz; GD is Gabor Doka.
LCI exchanges of the following datasets were corrected:
Transport, pipeline, supercritical CO2, w/o recompression
For an operation time of 30 years, with 7.9. Mt CO2/yr and a distance of 200 km a
lifetime transport service of 47'400 Million tkm results. Thus for a pipeline of 200 km a
pipeline infrastructure of 200km/47'000 Million tkm = 4.21941E-09 km per functional
unit of 1 tkm is necessary. CW calculates 200 km / (30yr * 7.9E6 tons * 200 km) *
1.5 = 6.34E-09 km. CW introduces a factor of 1.5. to account for a lifetime of 45, not
30 years (based on CW comment in calculation sheet). Lifetime according to the text
is 30 years. Data was changed to correspond to 30 years, as written in the text.
Transport, pipeline, supercritical CO2, w compression
I think this dataset should be based on