Effect of metals poisoning on FCC products yields: studies in an FCC short contact time pilot plant unit (original) (raw)
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Catalyst deactivation and the effect of catalyst makeup on the FCC unit
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The 9th International Conference "Environmental Engineering 2014", 2014
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Study of the Effect of Attrition on the Properties of Catalyst Used for Industrial FCC Operation
2019
In this study, the effect of attrition on the properties of a commercial catalyst used for industrial Fluid Catalytic Cracking (FCC) process has been investigated. Catalyst loss, physicochemical, and structural properties are some of the properties which have been used to evaluate the effect of attrition on the catalyst. BET, Sieve, XRF, SEM and XRD analysis were carried out on the fresh and spent catalysts. Attrition Index, which is a measure of the resistance of these catalyst samples to attrition, was also determined. Total surface area (118 m 2 /g), apparent particle size (75 μm), and compositional analysis all indicate the effect of attrition on the properties of the catalyst. The least sized particles were most attrited whereas SEM and XRD analysis showed the impact of attrition on the morphology and crystallinity of the particles. The attrition indices for the fresh and spent catalyst were found to be 58.9 and -2.50 respectively.
Iron Contamination Mechanism and Reaction Performance Research on FCC Catalyst
Journal of Nanotechnology, 2015
FCC (Fluid Catalytic Cracking) catalyst iron poisoning would not only influence units’ product slate; when the poisoning is serious, it could also jeopardize FCC catalysts’ fluidization in reaction-regeneration system and further cause bad influences on units’ stable operation. Under catalytic cracking reaction conditions, large amount of iron nanonodules is formed on the seriously iron contaminated catalyst due to exothermic reaction. These nodules intensify the attrition between catalyst particles and generate plenty of fines which severely influence units’ smooth running. A dense layer could be formed on the catalysts’ surface after iron contamination and the dense layer stops reactants to diffuse to inner structures of catalyst. This causes extremely negative effects on catalyst’s heavy oil conversion ability and could greatly cut down gasoline yield while increasing yields of dry gas, coke, and slurry largely. Research shows that catalyst’s reaction performance would be severel...
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Fluid catalytic cracking (FCC) unit has significant impact on refinery economics producing valuable products like gasoline and light olefins. Mandatory environmental regulations have imposed stringent quality limits on refinery products, especially on gasoline and diesel fuels. Through selection and effective utilization of catalyst and additives, refiners have been successful in achieving value additions as well as in meeting product quality norms. FCC catalyst market is competitive and it is often difficult to select catalyst based on vendor's claims. It is important to match the plant performance closely to understand unit constraints and exploit the new catalyst capabilities to full extent. Authors, using state-of-the-art facilities for catalyst characterization, evaluation and simulation tools selected superior catalysts and additives for their commercial units. The paper elaborates the laboratory evaluation methodology adopted; modeling techniques used for making yield predictions and presents case studies of successful catalyst and additive selection and use in a commercial FCC unit. ß
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