ARCO pilot unit test, catalyst

The test at M. W. Kellogg s and the test in the ARCO pilot nnit were done with different feeds, with different catalysts and in different pilot nnits, so it was not expected that the yields should be identical. The feed to the M. W. Kellogg s pilot unit was a synthetic Statfjord atmospheric residne and the catalyst used was a Filtrol 900 catalyst containing nickel and vanadinm contaminants [1]. This pilot unit was also pressurized. In the ARCO pilot unit at Chalmers the feed was a laboratory distilled Statfjord atmospheric residue and the catalyst was an almost metal-free EKZ eqnilibrinm catalyst from Katalistiks. The ARCO nnit is working at atmospheric pressnre. 

When discussing the suitability of the ARCO pilot unit for cracking atmospheric residues, this cannot be done without touching on the question about how to prepare the catalysts for testing. An equilibrium catalyst used in a commercial residue FCCU contains significant amounts of metal contaminants, especially nickel and vanadium. Fresh catalysts must therefore be impregnated with these metals and deactivated before the catalysts can be nsed in the pilot unit. We have shown that this... 

One of the objectives when our project started was to use North Sea atmospheric residues as feeds in the ARCO pilot unit. It was comprehensively shown during the very hrst years of the project that the ranking of the catalysts were dependant on the feed used [4,5]. The results of the tests done at this time showed that all the catalysts tested could be divided into three groups, all with their own characteristics, depending on the matrix surface area. 

The ARCO pilot unit is also used for evaluation of different atmospheric residue feeds. Reference catalysts are used in these investigations. The results from one such test is presented here, where two residue feeds B and C (see Table 3.1) are compared with each other. The catalyst used in this study was an equilibrium catalyst, see Table 3.11. 

The tests were performed in a modified circulating ARCO pilot unit at Chalmers [18,19] with a North Sea atmospheric residue as feed. The reactor temperature was 500°C and the regenerator temperature was 700°C. Each of the catalyst tests were... 

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