For the versatile use of biogas as fuel, it is necessary
to remove harmful impurities that affect the utilization
as an energy source. The most significant impurities that
require removal are corrosion-causing sulphur compounds
and organic silicon compounds, in particular, siloxanes.
Siloxanes transform into silicon dioxide on the surfaces
of gas engines and turbines and thus damage the
The objective of this study was to gather know-how on
biogas impurities and their concentration levels as well
as the solutions for trace compound removal. In addition,
further impacts of impurities on biogas usage from the
technical and economic standpoints are discussed. In the
study, a literature search was conducted on the existing
scientific and economic literature (2000 ?) as well as
the patents concerning biogas purification. The
information gathered has been substantiated as far as
possible by consulting experts in the field.
The emphasis of this study was the harmful components of
biogas electricity production and especially siloxanes.
In addition to the occurrence and removal of biogas
impurities, current methods of determining siloxane were
evaluated. A new concept for on-line determination of
siloxanes in the field was developed. Furthermore, the
report presents the biogas matrices at six sites in
Finland determined with the developed method.
|Place of Publication||Espoo|
|Publisher||VTT Technical Research Centre of Finland|
|Number of pages||84|
|Publication status||Published - 2009|
|MoE publication type||Not Eligible|
|Series||VTT Tiedotteita - Research Notes|
- landfill gas