FCC Matrix Components and Their Combination with Y Zeolite to Enhance the Deoxygenation of Bio-oils

Abstract

The immediate catalytic conversions of pyrolytic bio-oils from pine sawdust and soybean shell over mesoporous catalysts (silica, alumina, and silica-alumina) and their combinations with Y zeolite, were studied. The effect of mesoporosity and acidity on the bio-oil deoxygenation and conversion into hydrocarbons was investigated. Pyrolysis and immediate catalytic conversion of bio-oil were performed in an integrated pyrolysis-upgrading reactor, for 7 min under a 30-ml/min flow of nitrogen at 550 °C. Important differences were observed in the conversion of the bio-oils, according to the composition of the raw biomasses. Pine sawdust bio-oil produced more coke and less hydrocarbons in the range of gasoline than soybean shell bio-oil over all the catalysts. Mesoporous catalysts showed conversion and deoxygenation between 14 and 29 percentage points higher with the more acidic solid (SiO 2 -Al 2 O 3 ) in the case of pine sawdust bio-oil and between 2 and 10 percentage points higher with the solid having the highest specific surface area (SiO 2 ) in the case of soybean shell bio-oil. Among the compound catalysts, the best performance for the case of pine sawdust corresponded to the catalyst with the highest mesoporosity (Y/SiO 2 ), while for soybean shell corresponded to the most acidic catalysts (Y/Al 2 O 3 and Y/SiO 2 -Al 2 O 3 ). Soybean shell bio-oil showed more low molecular weight compounds (less than 130 g mol −1 ), which diffuse more easily in the zeolite channels, thus favoring conversion and deoxygenation mechanisms. On the contrary, for pine sawdust bio-oil, the surface area contributed by the mesopores in the matrix played a key role in pre-cracking bulky molecules.

Synthesis of mesoporous zeolite Y using Sapindus rarak extract as natural organic surfactant for deoxygenation of Reutealis trisperma oil to biofuel

“…The presence of mesopores with diameters of 3.70 nm and 6.49 nm is beneficial to enhance the diffusion rate of reactant/product and to improve the targeted product formation. 54,55 Zeolite Y-L10 catalyst appears to be effective in producing the highest hydrocarbon-like biofuel and DDO under H 2 -free conditions. However, the liquid yield is still relatively low, presumably due to a low number of Lewis acid sites.…”

A Machine Learning Model for Predicting Composition of Catalytic Coprocessing Products from Molecular Beam Mass Spectra

“…Petrobras has achieved coprocessing of bio-oils with VGO at a demonstration scale . Research in modifying an FCC catalyst for bio-oil processing is active, − yet the only commercial-scale FCC coprocessing that we are aware of is performed by Parkland Corporation and Preem . Additionally, Phillips 66 has plans to convert existing refinery infrastructure to process renewable feedstocks in 2024, and Topsoe and Preem are coprocessing renewable feedstocks in a hydrotreater…”

Nanostructured coating, Agricultural Biomass, Organic Rankine Cycle.

“…Deoxygenation is required due to the high presence of oxygen molecules. It reduces the O 2 content and gives chemical stability and high polarity to biofuels formed from biocoalytes, thus facilitating their chemical compatibility with conventional fuels [27], such as gasoline, Jet A1 and conventional diesel [28].…”