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Communication Dans Un Congrès Année : 2019

Use of hierarchical H-Y zeolite for the Fluid Catalytic Cracking of bio-oil with Vacuum Gas Oil

Résumé

Fluid Catalytic Cracking (FCC) gasoline represents one third of the global gasoline pool. In order to meet objectives regarding increased renewable share in transportation fuels, production of a hybrid bio/fossil fuel by co-refining biomass pyrolysis liquids with crude oil fractions in a conventional oil refinery, is an achievable approach [1]. However, oxygenated molecules, typical for the bio-feedstock, are still present in pyrolytic liquids. For high oxygenated molecule content, co-refining may lead to severe changes in products quality, such as a higher aromaticity and residual oxygenates in the hybrid fuels that are produced. In order to adjust the reactivity of FCC catalysts, Y zeolites have been upgraded by creating an additional mesoporosity. The aim of this mesopore network is to improve the diffusion of the large lignocellulosic fragments throughout the catalytic cracking catalysts. Hierarchical H-Y zeolites were prepared according to post synthetic processes performed on commercial CBV720 from Zeolyst [2, 3]. Three catalysts with well distinct multilevel pore networks were tested on a MAT catalytic test bench. The addition of 10% of bio-oil to the VGO into the feed led to a small decrease of naphtha yield. The analysis of liquid products by GC 2D revealed the presence of phenols as residual oxygenated components. Peaks of sugars and acids were not identified contrary to what had been seen for the bio-oil before the processing in the MAT test. The main difference of selectivity between the three materials was the coke yield (Figure 1.A). H-Y1 and H-Y2, were unexpected to achieve higher coke yield than CBV720 since higher mesopore volumes were found (Figure 1.B). However, the post synthetic modifications of CBV720 induced structure rearrangement [2]. The progressive disappearance of the large mesopore-macropores observed on CBV720 (Figure 1.C-E) explained the aforesaid coke production. It is highlighted that the pore structure of the hierarchical zeolites plays a key role for the co-processing of bio-oil with VGO. Catalytic cracking of model molecules on the presented materials will be presented in order to identify the roles of oxygenates on catalytic performances.
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Dates et versions

hal-02099437 , version 1 (15-04-2019)

Identifiants

  • HAL Id : hal-02099437 , version 1

Citer

Y. Chapelliere, A. Tuel, C. Mirodatos, D. Farrusseng, Y. Schuurman. Use of hierarchical H-Y zeolite for the Fluid Catalytic Cracking of bio-oil with Vacuum Gas Oil. 42nd Annual Meeting of the British Zeolite Association, Apr 2019, Birmingham, United Kingdom. ⟨hal-02099437⟩
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