Research Centre
Energy
Conclusions and future
developments
Biography
Method
Introduction
Results
BioPower-to-Gas
Is bioP2G feasible from a techno-economic and sustainability
point of view?
With an increasing penetration of wind and solar (PV)
energy in our energy supply, one of the issues is excess
electricity at times of much wind or solar energy available.
Amongst other possibilities, a way to cope with these
situations may be to convert excess electricity to an energy
carrier in the form of methane. Biological methane
production (biomethanation) from electricity is subject of
the project Bio-P2G. The focus of this research is to
investigate the feasibility of biomethanation in terms of
economy, energy efficiency and greenhouse gas (GHG)
reduction.
Although the cost price results show a reduction with regards to the reference model, the final price of the green gas is still subject to increase according to the previously mentioned addition of
equipment to stabilize the electrolyzer. Furthermore, this process relies on the availability of energy surpluses for its operation, which can be translated into operating hours per year. The less frequent the energy surpluses become, the lower amount of green gas will be produced and the more
expensive it becomes. The same situation happens while studying the effect that the variation of
the electricity prices would have within the process. The higher the price of the electricity, the more expensive the final gas becomes. Within this context, it is recommended to explore the effect that
the establishment of a price for energy surpluses would have within the final price of the gas.
A. Choudari M.C. Orsini Muňoz E.J. Hengeveld J. Bekkering Contact: e.j.hengeveld@pl.hanze.nl j.bekkering@pl.hanze.nl
On the reference model, a cost of 72.1 €ct/Nm3 of injected gas was obtained for a year production of 2,400,000 Nm3/a of green gas,
whereas this case study generated a price of 66.4 €ct/Nm3 of green gas at an annual production of 4,031,992 Nm3/a. In both cases, the Wobbe Index obtained is 43.9 MJ/Nm3.
preliminary results
Concerning a reference biogas supply chain (Figure 1), the transformation blocks within the blue frame were replaced with
transformation blocks resembling a biomethanation step.
Figure 1: Reference model. Figure 2: Added transformation blocks.
