BASF交流材料 印尼.pdf

CO2 Product Purity Problem On Main CO2 Removal Unit Suyanto Jefry Yusuf BASF Asian Pacific Ammonia Customer Experience Exchange Workshop 23-25 April 2013, Beijing-China © PT. PIM 2013 Main CO2 Removal (MCR) Feed Gas : H2 = 56.96 % N2 = 20.62 % CH4 = 0.34 % Ar = 0.25 % CO = 0.30 % CO2 = 18.52 % Treated Gas: H2 = 73.51 % CO = 0.37 % CO2 = 0.10 % aMDEA Solution : MCR Unit Produce : Strenght = 40 - 45 % of T.A. Product CO2 = 31929 NM3/H Ratio Act : MDEA = ± 0.08 Purity Product = 99 % Circ. Rate = 720 – 790 T/H Jefry Yusuf@2013 Problems On MCR The main problems in MCR are : 1. Slip CO2 Absorber is high 2. Low purity product CO2 Slip CO2 absorber is high Indication : - Slip CO2 0.1 % methanator catalyst bed temperature rise. Efect : - Methantor catalyst load up that shorten life time. - The worst posibility is that it can shut down plant. Low purity product CO2 (will be discussed on this occasion) Indication : - CO2 purity 99 % PIC-403 urea plant wide-open Efect : - Production urea fell. - The worst posibility an explosion in the area of synthesis urea. Jefry Yusuf@2013 Low Purity Product