Stručni rad
MONITORING THE PROPERTIES OF FCC CATALYSTS IN THE OPERATION OF FCC UNIT
Željka Bantić
Maja Fabulić Ruszkowski
Milorad Đukić
zdenko Čulig
Sažetak
Abstract
Maintaining high conversion level in the fluid catalytic cracking (FCC) process contributes considerably to total refinery profit. The key role in this is that of the catalyst volume, being dosaged daily into the FCC process.
Laboratory tests of the samples of equilibrium FCC catalysts from the process are a part of the regular control of the FCC unit operation both for manufacturers and for users. The data of laboratory tests of physical and catalytic properties of equilibrium catalysts provide an insight into the operation of the FCC unit, and enable optimal process control. The present paper is a presentation of regular testing of equilibrium samples of FCC catalysts from OR Sisak, performed continuously in the lab of the Technological Development Service within the R&D Sector.
The paper presents the results of laboratory tests performed on five samples of equilibrium catalysts taken under different process conditions from the FCC unit within the period of one month.
During the tests the impact of process parameters was monitored on the changes of specific area and MAT conversion. The samples of equilibrium catalysts were determined their specific area according to BET-method, while the testing of catalytic activity was performed using microactivity test (MAT). Test results show that MAT conversion follows the catalyst specific area increase and decrease trend. The increase of temperature and pressure in the regeneration increases also the volume of fresh catalyst added into the process in order to maintain the existing activity and specific area of the catalyst.
The aim of the paper is to point to the importance of these tests which are a part of the necessary accompanying control of the FCC process, in order to optimize the operation of the FCC unit as much as possible at the lowest possible cost.
Ključne riječi
fluid catalytic cracking (FCC); catalyst replenishment and regeneration optimal process control and regulation; catalyst specific surface BET test; catalyst MAT microactivity test
Hrčak ID:
7285
URI
Datum izdavanja:
30.6.2004.
Posjeta: 2.128 *