Corannulene, C20H10 is synthetic molecule sharing many similarities with fullerene, like charge transfer capabilities, a bended shape and the possibility to be intercalated by alkali metals. All these similitudes, combined with previous calculations and recent experiments, make this molecule a promising system for hydrogen storage. Like fullerene, intermolecular interactions are prevalently van Der Waals and a phase change is expected above room temperature, occuring before the melting point (270 C). With this experiment we seek to investigate for the first time the hydrogen momentum distribution across the transition and up to the melting point.