In this subtask gas cleanup (polishing) unit processes that are feasible in the 50-200 MW size range and that can be integrated together will be studied. The process options include:

• hot gas cleanup for H2S (adsorbents)
• catalytic gas treatment units (conversion of HCN)
•  alternatives for methanol solvent (Rectisol process) in acid gas treatment
• gas synthesis processes in SNG and hydrogen processes, special attention will be paid on biomass fed processes.

The work will be realised as literature survey and if needed, experimental work will be also launched.