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BABIU pilot plant
A pilot plant to realise the gas/solid contact was constructed.
The pilot plant for CO2 uptake and reduction of H2S from landfill biogas with MWSI BA was designed to treat 2 Nm3/h of biogas collected from a substation within the landfill of Podere Rota in Terranuova Bracciolini (AR – Italy).
The process is characterized by a direct contact between the BA and the biogas. In order to enable the CO2 exchange between the gas and the solid it is necessary to design a system able to contain the waste, without any inlet of air, and protecting them from the atmospheric conditions, allowing for biogas to flow through the layer of porous medium.
From the preliminary laboratory analysis carried out in the frame of the Action A1 the capability of Municipal Solid Waste Incinerator (MSWI) Bottom Ash (BA) was assessed and the key parameter, which is the specific biogas gas flow rate (Nm3/h/tBA) was determined and assumed at about 2 Nm3/h/tBA.
To process such a flow rate of biogas about 1 ton of BA from waste incenerator are required.
Since the equivalent diameter of the reactor – in reference to the BA core - is required to be not less than 500 mm, considering a base area of about 0,35 m2, assuming a density of BA of 1.66 t/m3, we can deduce a height of the body of the reactor about 2 m.
After a discussion about the admissible reactor height with CSAI, considering also issues related to the ease of reactor filling, it was decided to limit the height of the system. So it was necessary to divide the system into two twin reactors in series.
The BABIU pilot plant consists of:
- the reactors;
Figure - The twin reactors.
Innovative processes for biogas upgrading - Presentation of results of the Project UPGAS-LOWCO2
Innovative processes for biogas upgrading - Presentation of results of the Project UPGAS-LOWCO2
