The Giammarco-Vetrocoke Process for the CO2 removal to clean SNG/Syngas from biomass (RDF) gasification units

L. Tomasi, Giammarco-Vetrocoke srl, Venice - Italy

Abstract

In Biomass gasification process for SNG or Syngas production, the CO2 Removal is a necessary step to achieve the required gas cleaning. The Giammarco-Vetrocoke (GV) process offers a reliable, well proven and environmental friendly technology coupled with low CAPEX/OPEX figures. The GV CO2 Removal process is based on a chemical absorption stage which utilizes a Hot Potassium Carbonate (HPC) water solution. The raw SNG/Syngas is washed in an absorption column (absorber) in countercurrent with the HPC solution which reacts with the CO2 forming Potassium Bicarbonate. The HPC solution from the absorber is transferred to a regeneration column (stripper) where, by heating the solution the Potassium Bicarbonate is converted back to Potassium Carbonate releasing the CO2 which is totally available at high purity to be vented to the atmosphere or recovered at food grade for other utilization. Case histories are presented to illustrate the results achieved in different applications.