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transported to the BioSNG demonstration unit. The product gas is already cleaned from
particles and tars to the extent required for gas engine operation. In the BioSNG demonstration
unit, additional cleaning of the gas is carried out to avoid the poisoning of the methanation
catalyst. The conditioned product gas enters the fluidized bed methanation reactor, where the
methanation, hydration of olefins and CO-shift take place in parallel. Then the raw SNG passes
several purification steps (CO removal, drying) to increase the methane content to meet the
2
regulations for feeding into the natural gas grid.
The PDU was operated for several weeks and a high-quality gas as required by the gas grid
was produced. The plant was able to operate at design process parameters. A number of
parameters were tested, varying pressure, temperature and capacity of the plant and also
varying the recycle flow from hydrogen separation.
Figure 7.6 Synthesis platform Güssing. (Reprinted with permission from Ref 34. Copyright
2012 BTG Biomass Technology Group BV)
