Main technologies for biogas upgrading are: absorption by solvents, adsorption, permeation by membrane.

ATProX’s activity focused on adsorption technology, in fact, thanks to collaborations with American companies, catalysts have been developed for the removal of H2S, while within the company team has been developed a solution that allows the simultaneous removal of CO2 and H2O. The system is designed in modular way, with a transportable plug-and-play package, pre-engineered, pre-fabricated and pre-tested in the workshop that allows you to reduce costs, time and project risks.

The innovative system designed by the ATProX team provides that the three compounds can be removed by means of a single equipment (adsorption column), in a process known as multibed adsorption, with a significant economic advantage in terms of CAPEX, OPEX but also with a plus in the layout and operational management of the plant.

The biogas is passed through three catalytic beds in series, selective towards CO2, H2O and H2S, which can be installed within the same asdorption column. Depending on the case, the bed will then be regenerated in the best way ensuring functionality over time and obtaining the strict specifications in the output gas.

A typical configuration of an adsorption system for biogas purification includes three columns in parallel, where one is working, and two in regeneration. Depending on the case, only two columns can be considered, one in operation and the other in regeneration. A complete system with triple adsorption within the same equipment is being studied with two potential customers in Europe, while a project for the removal of H2S only has already been concluded and the basic engineering for a multibed for the combined removal of CO2 and H2O is underway.