Al-Hajji, A. A.

Saudi Aramco, Dhahran, Saudi Arabia

Adnan A. Al-Hajji is a senior research science consultant at the Saudi Aramco Research and Development Center, where he leads the advanced hydrocarbon characterization group. Mr. Al-Hajji received his BS and MS degrees in chemistry from King Fahd University of Petroleum and Minerals (KFUPM) in Dhahran, Saudi Arabia. He has been with Saudi Aramco since 1976 and has authored numerous publications.

Catalyst replacement strategy for a hydrocracking unit at a Middle East refinery

A Saudi Aramco refinery operates a series-flow, single-stage hydrocracking unit (HU) in a recycle high-conversion mode. The HU has been in operation for over 35 years and is being debottlenecked to increase its throughput by 20%.