Catalyst ruthenium, palladium

The ruthenium, palladium catalyst

AbstractThe ruthenium- incorporated catalyst, (0. 3% Pd–0. 2% Ru) / CCM (carbon carbonaceous composite material) catalyst, has been studied as a candidate to replace an existing 0. 5% Pd/ C catalyst for hydropurification of crude terephthalic acid; it gives an excellent performance and is a promising catalyst. It has been confirmed that the (0. 3% Pd–0. 2% Ru) / CCM catalyst has higher stability in actual co mm ercial condition and aging in lab condition compared with a co mm ercial catalyst. The increased stability may be explained as the effect of ruthenium to prevent the sintering of supported metal particles. The (0. 3% Pd–0. 2% Ru) / CCM catalyst shows equal or less amount of side reaction of benzene ring hydrogenation. The dust from carbon support can also be decreased from the (0. 3% Pd–0. 2% Ru) / CCM catalyst due to the increased strength of the CCM. The (0. 3% Pd–0. 2% Ru) / CCM catalyst may be very competitive to the existing catalyst due to the inexpensive ruthenium and the expected long life of the catalyst.