Hydrates of natural gases like methane have become subjects of great interest, mainly because of their potential as an energetic resource. Another important discussion topic is carbon dioxide and its function as greenhouse gas. Extracting methane from gas hydrates while simultaneously storing carbon dioxide in them (reformation) could be a promising means to solve both problems at the same time. Here, reformation of natural gas hydrates has been examined to realize technically feasible reformation processes and promising results regarding the saturation of hydrates with carbon dioxide have been achieved.