Pd-Nb catalyst for selective hydrogenation of acetylene and production method of the same

摘要

PURPOSE: A catalyst for selective hydrogenation of acetylene is provided which has high acetylene selectivity and reaction activity even though the catalyst is reduced at low temperature when preparing or regenerating a catalyst, and a preparation method of the catalyst for selective hydrogenation of acetylene is provided. CONSTITUTION: In a hydrogenation catalyst for selectively hydrogenating acetylene into ethylene in an ethylene-acetylene mixed gas, the hydrogenation catalyst comprises 0.05 to 2.0 wt.% of palladium and 0.045 to 1.8 wt.% of niobium with the balance being a support. In a preparation method of a hydrogenation catalyst for selectively hydrogenating acetylene into ethylene, the preparation method comprises first process of supporting palladium onto the support by drying and firing the aqueous solution impregnated support after impregnating a support with a tetraamine palladium hydroxide aqueous solution; second process of supporting niobium onto the support by drying and firing the niobium compound solution impregnated palladium supported support after impregnating the palladium supported support (Pd catalyst) with a niobium compound solution; and third process of reducing the support for 1 to 5 hours by contacting the oxygen removed support with hydrogen having a temperature of 300 to 500 deg.C after removing oxygen from the support by flowing nitrogen onto the palladium and niobium supported support (Pd-Nb catalyst) at an ordinary temperature.