Izlaganje sa skupa
THE IMPACT OF THE CATALYTIC REFORMING OPERATION SEVERITY ON CYCLE DURATION AND PRODUCT QUALITY AT THE RIJEKA OIL REFINERY
Zoran Adžamić
Senad Bešić
Sažetak
Abstract
For the reformate octane number of 99 the reduction of charge from the designed 90 m3/h to 75 m3/h results in the lowering of the Start of Run inlet reactor temperature from 515.2 to 511°C with a hydrogen/hydrocarbons share of 7.3:1 and 23 bar at the high pressure separator. Knowing the maximal inlet reactor temperatures at Platforming 2 of around 528°C for the existing catalyst type, it turns out that the temperature range of catalyst usability goes up from 12.8 to 17.1°C. In this way, from 116 cycle days we come to a more acceptable cycle length of 198 days. Such cycle length enables two catalyst regenerations per year.
Although Platforming 2 today operates under reactor pressure from 21 to 24 bar, in order to be able to keep track of the data, for calculation presentation in Tables 1 and 2 we have taken a constant value of the recycle gas pressure. We should not forget that every change in charge composition may cause impredictable changes of the volumetric hydrogen concentration in the recycle gas i.e. variations in the calculated reforming catalyst life value.
Cycle duration of approximately one year with the reformate octane value of 99 units could be reached by the fresh charge capacity lowering below 65 m3/h. The catalytic reforming process at the Platforming 2 plant at Rijeka Oil Refinery would, with the capacity of 62.5 m3/h of fresh charge, and a H2/HC ratio >9, enable the catalyst cycle length of 357 days.
Ključne riječi
severe running of platforming; motor gasoline; octane number; viewpoint of quality improvement
Hrčak ID:
7396
URI
Datum izdavanja:
28.3.2003.
Posjeta: 1.992 *