Conversion of Vegetable Oils into Hydrocarbons over CoMo/MCM-41 Catalysts

Deoxygenation of triglycerides over Co and Mo sulfides supported on a series of mesoporous molecular sieves (MCM-41) with varying Si/Al ratio has been investigated in this contribution. The catalysts were tested in a flow reactor at reaction temperatures 300 and 320 °C, hydrogen pressures 2–11 MPa and space velocities 1–4 h−1 using refined rapeseed oil as a feedstock. Incorporation of Al into the framework of MCM-41 led to an increase of both conversion of triglycerides and selectivity to hydrocarbons, namely n-heptadecane and n-octadecane. However, the conversion of triglycerides was lower than that achieved over alumina supported CoMo. Moreover, the rather high selectivity to oxygenated products, as compared with alumina supports, has made possible a detailed description of the reaction intermediates and their dependence on the reaction conditions.

[1]  Dmitry Yu. Murzin,et al.  Heterogeneous Catalytic Deoxygenation of Stearic Acid for Production of Biodiesel , 2006 .

[2]  Avelino Corma,et al.  Synergies between bio- and oil refineries for the production of fuels from biomass. , 2007, Angewandte Chemie.

[3]  Gérald Djéga-Mariadassou,et al.  Utilization of vegetable oils as an alternative source for diesel-type fuel: hydrocracking on reduced Ni/SiO2 and sulphided Ni-Mo/γ-Al2O3 , 1989 .

[4]  Bernard Delmon,et al.  Study of the Hydrodeoxygenation of Carbonyl, Carboxylic and Guaiacyl Groups Over Sulfided Como/gamma-al2o3 and Nimo/gamma-al2o3 Catalysts .1. Catalytic Reaction Schemes , 1994 .

[5]  J. Čejka,et al.  Synthesis of highly ordered MCM-41 silica with spherical particles , 2007 .

[6]  D. Kubička.  Future Refining Catalysis - Introduction of Biomass Feedstocks , 2008 .

[7]  C. A. Emeis.  Determination of integrated molar extinction coefficients for infrared absorption bands of pyridine adsorbed on solid acid catalysts , 1993 .

[8]  D. Kubička,et al.  Thermodynamic balance in reaction system of total vegetable oil hydrogenation , 2008 .

[9]  Naděžda Žilková,et al.  Transformation of Vegetable Oils into Hydrocarbons over Mesoporous-Alumina-Supported CoMo Catalysts , 2009 .

[10]  C. Gommes,et al.  Quantitative Characterization of Pore Corrugation in Ordered Mesoporous Materials Using Image Analysis of Electron Tomograms , 2009 .

[11]  Dmitry Yu. Murzin,et al.  Hydrocarbons for diesel fuel via decarboxylation of vegetable oils , 2005 .

[12]  G. N. D. R. Filho,et al.  Formation of alkanes, alkylcycloalkanes and alkylbenzenes during the catalytic hydrocracking of vegetable oils , 1993 .

[13]  David Kubička,et al.  Hydroprocessed rapeseed oil as a source of hydrocarbon-based biodiesel , 2009 .

[14]  A. Krause,et al.  Hydrodeoxygenation of methyl esters on sulphided NiMo/γ-Al2O3 and CoMo/γ-Al2O3 catalysts , 2005 .

[15]  J. Čejka,et al.  Experimental study of the effect of Si/Al composition on the aluminum distribution in (Al)MCM-41 , 2001 .

[16]  Avelino Corma,et al.  Processing biomass in conventional oil refineries: Production of high quality diesel by hydrotreating vegetable oils in heavy vacuum oil mixtures , 2007 .

[17]  A. Krause,et al.  Simultaneous hydrodesulfurization and hydrodeoxygenation: interactions between mercapto and methoxy groups present in the same or in separate molecules , 2001 .

[18]  A. Corma,et al.  Synthesis of transportation fuels from biomass: chemistry, catalysts, and engineering. , 2006, Chemical reviews.

[19]  J. Čejka,et al.  Grafting of alumina on SBA-15: effect of surface roughness. , 2008, Langmuir : the ACS journal of surfaces and colloids.

[20]  J. Čejka,et al.  Acidic properties of SSZ-33 and SSZ-35 novel zeolites: a complex I.R. and MAS NMR study , 2008 .

[21]  Bernard Delmon,et al.  Study of the Hydrodeoxygenation of Carbonyl, Carboxylic and Guaiacyl Groups Over Sulfided Como/gamma-al2o3 and Nimo/gamma-al2o3 Catalyst .2. Influence of Water, Ammonia and Hydrogen-sulfide , 1994 .