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Rueil-Malmaison, France

Becker P.J.,French Institute of Petroleum | Serrand N.,French Institute of Petroleum | Celse B.,French Institute of Petroleum | Guillaume D.,French Institute of Petroleum | Dulot H.,Axens SA
Fuel | Year: 2016

Development of models for industrial hydrocrackers has received a great amount of attention by the scientific community over the past decades. Two fundamentally different modelling approaches are compared in this paper: a continuous lumping model with three families (paraffins, naphthenes, and aromatics) and a single events microkinetic model. The aim is to demonstrate the differences in the capabilities of the two modelling frameworks. Both models are capable of simulating experimental data from hydrocracking of a pre-treated Vacuum Gas Oil in a pilot plant at industrial conditions. The continuous lumping model provides better results of the macroscopic effluent characteristics, such as yield structure and PNA (Paraffin, Naphthene, Aromatic) distribution in the middle distillate cut. It requires only the feed SIMDIS (Simulated Distillation) and PNA composition to be known. The single events model, on the other hand, provides information which is not available in a simple continuous lumping model. An analysis of the reaction kinetics of paraffins and mono-naphthenes is performed to demonstrate this aspect. The single events model is far more complex and computationally expensive than the continuous lumping model. In conclusion, the two approaches should be considered complementary rather than competitive. In conjunction, they can be used to balance the drawbacks of each individual modelling approach. © 2015 Elsevier Ltd.

Quignard A.,French Institute of Petroleum | Caillol N.,French Institute of Petroleum | Charon N.,French Institute of Petroleum | Courtiade M.,French Institute of Petroleum | Dendroulakis D.,Axens SA
Fuel | Year: 2013

Distillate liquid yields from high hydrogen pressure catalytic conversion of coal processes, called Direct Coal Liquefaction (DCL), are typically high at 4-5 bbl/T coal on a dry ash free basis for the best available DCL processes, making them an attractive option to produce transportation fuels from coal. These yields are significantly higher than using the so called Indirect Coal to Liquid (ICL) route, i.e. gasification plus Fisher Tropsch (FT) synthesis. Nevertheless, DCL products are often considered as relatively low quality products and their chemical structure is not well known. This work focuses on the physical/chemical standardized analyses and innovative detailed characterization of the properties and the unique composition of jet fuel and Diesel cuts obtained by DCL before and after hydroprocessing. It shows that 100% high quality fully desulfurized Jet A, Jet A-1 or JP-8 aviation fuels can be obtained when using the appropriate hydrocracking conditions. It also shows that the Diesel cut obtained from the same upgrading process can be used as a high quality component for transportation fuels with less than 5 ppm sulfur, exhibiting a very specific chemical structure that is accompanied by excellent cold flow properties and good combustion characteristics. This innovative detailed characterization of hydroprocessed DCL jet fuel and Diesel cuts was provided using a GC × GC method developed within the IFP Energies nouvelles (IFPEN) laboratories. © 2012 Elsevier Ltd. All rights reserved.

Craig M.,Axens SA
6th Southwest Process Technology Conference 2014 | Year: 2014

Low Investment and Attractive Payout • Revamping CFHT to Mild Hydrocracking • Revamping Distillation Column to broaden Diesel Cutpoint □ Moderate Investment • Adding Hydrocracking Capacity • Market Demand for Lube Oil •With or without FCC Unit □ Highest Investment & Best Return • Adding Residue Hydrocracking ahead of Delayed Coking • Integrate VGO Hydrocracking • Simple Payout > 3 years • Achieves highest DIG Selectivity.

Villanueva N.,French Institute of Petroleum | Villanueva N.,Axens SA | Flaconneche B.,French Institute of Petroleum | Creton B.,French Institute of Petroleum
ACS Combinatorial Science | Year: 2015

In this work, we first report the acquisition of new experimental data and then the development of quantitative structure-property relationships on the basis of sorption values for neat compounds and up to quinary mixtures of some hydrocarbons, alcohols, and ethers, in a semicrystalline poly(ethylene). Two machine learning methods (i.e., genetic function approximation and support vector machines) and two families of descriptors (i.e., functional group counts and substructural molecular fragments) were used to derive predictive models. Models were then used to predict sorption variations when increasing the number of carbon atoms in a series of hydrocarbons and for n-alkan-1-ols. In addition to the performed internal/external validations, the model was further tested for surrogate gasolines containing ca. 300 compounds, and predicted sorption values were in excellent agreement with experimental data (R2 = 0.940). © 2015 American Chemical Society.

Dubin G.,Axens SA | Largeteau D.,Axens SA
American Fuel and Petrochemical Manufacturers, AFPM - AFPM Annual Meeting 2014 | Year: 2014

Similar to coker naphtha, FCC naphtha, often the other major cracked naphtha stream for the gasoline pool, must be processed in either a selective hydrotreater to preserve octane or in a conventional pretreater upstream of isomerization or reforming. As refiners continue to push the amount of cracked material in their hydrotreating units, advanced catalyst and grading options are needed for the difficult processing scenarios. A discussion covers the difference of coker naphtha from straight run naphtha and other naphtha streams; impacts from the various factors affecting coker naphtha; coker naphtha hydrotreating; naphtha block solutions - breakthrough silicon traps with SiTrap™ and deep nitrogen removal with HR 648; and Prime-G™ FCC gasoline desulfurization technology and catalysts. This is an abstract of a paper presented at the AFPM Annual Meeting (Orlando, FL 3/23-25/2014).

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