REVERSIBLE FORMATION OF ACTIVE SITES ON SULFURATED NICKEL CATALYST
The active sites for hydrogenation are formed on sulfurated nickel by displacing sulfur atoms with acetylene, and when acetylene is exhausted, the sites are occupied by sulfur to result in inactive. The above process is ensured with the H2–D2 equilibration reaction, and makes clear the characteristic of the partial hydrogenation of acetylene over sulfurated nickel.