A METHOD OF STORING AND DELIVERING AMMONIA AND THE USE OF ELECTROMAGNETIC RADIATION FOR DESORPTION OF AMMONIA FROM A CHEMICAL COMPLEX

摘要

A method of storing and delivering ammonia and the use of electromagnetic radiation for desorption of ammonia from a chemical complex. Solid metal ammine complexes are applied for safe and high-density storage of ammonia to be released for use as reducing agent in selective catalytic reduction of NO_x in exhaust gases. The compositional formula of the metal ammine complexes is M(NH₃)_nX_z, where M²⁺ represents one or more metal ions capable of binding ammonia, X represents one or more anions, n is the coordination number (from 2 to 12), and z the valency of the metal ion (and thus the total number of compensating anion charges). Ammonia is released non-thermally by photon-activation using electromagnetic irradiation of the complex bond between ammonia coordinated to the metal ion