| 摘要 |
PURPOSE: To efficiently decompose ammonia at relatively lower temperatures over a long period of time by contacting ammonia or gas containing ammonia with a catalyst in which ruthenium is supported on an inorganic carrier and decomposing ammonia into nitrogen and hydrogen. CONSTITUTION: A catalyst is used which is obtained by a process in which α-alumina, an inorganic carrier, is impregnated with an aqueous solution of ruthenium chloride which is reduced with hydrogen and in which the content of ruthenium is 0.05-8.0wt.%, specific surface area is 0.05-100m<2> /g, and particle size (spherical) is about 3mm in diameter. A stainless steel tube is filled with the catalyst, and a micro-sheath heater is attached to the outside to make a cylindrical reactor for decomposing ammonia. The reactor is heated at a specified temperature, and ammonia gas diluted and adjusted with nitrogen is supplied to the reactor using a mass flow controller so that ammonia is decomposed into nitrogen and hydrogen at catalytic temperature of 300-800 deg.C. |
