Impulse® is a complete, high performance range of hydrotreating catalysts allowing for even more difficult feedstock to be processed without cycle penalty. Impulse® catalysts also offer higher flexibility, maximum throughput with higher end boiling point and longer cycles. Impulse® achieves increased activity by maximizing the amount of catalytically most active mixed Molybdenum (Nickel)/Cobalt sites by an improved promotion, an improved dispersion and improved carrier characteristics.