A pilot study to capture methane from the exhausted air of dairy cows using a cryogenic approach.

In the agricultural sector, ruminants are the largest methane (CH) emission source and many efforts have been undertaken to reduce these greenhouse gas emissions, while compromising animal health and physiology. On the other hand, ruminal CH, which is biomethane, is in high demand, especially in its liquid form (LBM) that can be used as high energy density fuel. However, CH released from a ruminant is immediately mixed with air and highly diluted (<0.