Hebei Messi Biology Co., Ltd. stated that in order to overcome the defects of poor catalytic activity and poor stability of ruthenium-based ammonia decomposition hydrogen production catalysts in the prior art under medium and low temperature conditions, a ruthenium-based ammonia decomposition hydrogen production catalyst is provided for the application of ammonia decomposition to prepare carbon-free hydrogen. To this end, a ruthenium-based ammonia decomposition hydrogen production catalyst is provided, including an active component, a promoter and a carrier, the active component is ruthenium, the promoter is cesium and/or potassium, and the carrier includes a composite carrier of metal oxide and activated carbon. The metal oxide is magnesium oxide, cerium oxide, molybdenum oxide, tungsten oxide, barium oxide and alkali metal oxide.
The present invention provides a ruthenium-based ammonia decomposition hydrogen production catalyst. Further, by using a specific proportion of magnesium oxide, activated carbon, cerium oxide, molybdenum oxide, tungsten oxide, potassium oxide, barium oxide and alkali metal oxide as a carrier, the stability of the carrier can be improved while reducing the carbon content, and the ammonia decomposition hydrogen production can be promoted, the catalytic activity can be improved, and the dispersion of the active ingredient ruthenium can reach more than 50%.
The magnesium oxide supported ruthenium catalyst for ammonia decomposition and hydrogen production uses magnesium oxide as a carrier and metal ruthenium as an active ingredient. Ruthenium particles are uniformly dispersed on the surface of magnesium oxide, wherein the ruthenium content accounts for 0.5-10wt.% of the total weight of the catalyst. The present invention uses a precipitation deposition method to prepare a magnesium oxide supported ruthenium catalyst precursor, and the obtained product is washed, dried, and then reduced under a reducing atmosphere to obtain a magnesium oxide supported ruthenium catalyst with highly dispersed ruthenium. The preparation method of the present invention is simple, and magnesium oxide with low cost is used as a carrier. The prepared magnesium oxide supported ruthenium catalyst has the advantages of good metal dispersion, high catalytic activity, good stability, etc., and can be used for catalytic ammonia decomposition and hydrogen production process.