USE OF AN IONIC LIQUID FOR STORING HYDROGEN

摘要

Method of storing hydrogen by forming a first ionic liquid by inducing a borohydride in a second ionic liquid comprising a cation and an anion comprising borate, and forming the second ionic liquid by releasing the hydrogen out of the first ionic liquid by using water and/or a catalyst, which method is characterized in that the first and the second ionic liquid are both water miscible and the second ionic liquid is separated, particularly is salted out, from solution in water by adding a separation inducer; certain ionic liquids for storing and releasing hydrogen comprising a borohydride or for preparing a ionic liquid for storing and releasing hydrogen comprising a borate; and a process for preparing ionic liquids for storing and releasing hydrogen comprising a borohydride.

主权项

1. Method of storing hydrogen by treating a second ionic liquid which comprises a cation and an anion comprising borate with borohydride, to obtain a first ionic liquid comprising releasable hydrogen, characterized in that
(i) the first and the second ionic liquid both are water miscible, (ii) the first ionic liquid is separated from solution in water by adding a phase separation inducer, and (iii) the second ionic liquid is obtained by releasing the hydrogen out of the first ionic liquid under use of water, optionally in the presence a catalyst; and optionally (iv) the first ionic liquid further comprises inorganic borohydride to an extent that the first ionic liquid remains water miscible and the second ionic liquid after the release of hydrogen remains water miscible.