Method for separating carbon dioxide in biogas systems

摘要

The method involves diverting purified raw biogas (2) via adsorbers (A1-A4) made of adsorber resin in an adsorption phase in ambient pressure. The raw gas is regenerated in a regeneration phase of the adsorbers using flushing gas (7) e.g. air, at a temperature and the pressure. The biogas is purified before a separation process of carbon dioxide, desulfurized and dried. Minor components are removed, and a flushing process of the adsorbers is implemented with the biogas for avoiding contamination in the biogas at beginning of the adsorption phase and controlled by valves (V1-V4) and sensors. An independent claim is also included for a device for separation of carbon dioxide in a biogas system.