FEED GAS PRE-HEATER EFFICIENCY CALCULATION AND ENHANCEMENT OF AMMONIA PLANT

Abstract

PakArab fertilizer limited was established on November 15, 1972 by the joint venture of Islamic Republic of Pakistan and state of Abu Dhabi. The aim was to strengthen the ties between the two states, however PakArab was privatized under the privatization policy in July 2005 and it was then acquired by Fatima Group and Arif Habib Group. PakArab is a natural gas-based steam reforming power plant which was designed by KELLOG INTERNATIONAL CORPORATION. It has a nominal capacity of 910 t/day of liquid Ammonia at -34 C. Pakarab is in competition with other fertilizer companies like Engro, Fauji fertilizer etc. Due to economic constraints Pakarab plant is shut down currently. Therefore, this project is very critical to the industry. Under the scope of the project we are trying to minimize energy utilization and save cost. Pakarab faces 4 shutdowns annually due to the Catacarb system installed to remove CO2 from process gas. This thesis report compares the solvents used to remove CO2 with respect to efficiency and cost.