Effect of vulcanization and reaction temperature of the carbide supported on activated carbon on glycerol trioleate deoxygenation
Vol 5, Issue 1, 2022
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Abstract
Cobalt molybdenum carbide supported on activated carbon was synthesized and the effect of sulfiding on the catalytic activity of the glycerol trioleate deoxygenation process (DOX) was evaluated. Prior to the glycerol trioleate deoxygenation reactions, the catalyst was reduced and sulfided with CS2/H2. The CoMo/CA carbide was characterized by specific area (B.E.T), X-ray diffraction (XRD), elemental analysis (CHON-S), potentiometric titration with n-butylamine and X-ray photoelectron spectroscopy (XPS). The specific area of the CoMo/CA carbide and the support were 246 m2/g and 881 m2/g, respectively. XRD analysis proved the presence of Co6Mo6C2 and metallic cobalt. XPS showed the presence on the surface of signals assignable to Moδ+, Mo4+, Mo6+, Co2+, S2– and SO42–. Sulfided CoMo/CA carbide showed higher activad to glycerol trioleate esoxygenation than unsulfided CoMo/CA carbide. The highest yield was obtained at 310 °C, 900 psi H2 and 2 h of reaction (100% conversion) and a higher selectivity towards heptadecane (55%) and octadecane (45%) favoring decarboxylation (HDCX) and decarbonylation (HDCn) than hydrodeoxygenation (HDO).
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1. Sanchez L, Llano B, Rios L. Production of renewable diesel from Higuerilla oil using Nickel-Molybdenum catalysts supported on alumina (in Spanish). Technological Information 2017; 28(1): 13–24.
2. De la Rosa EA. Hydroprocessing of jatropha Curcas L. vegetable oil for the produc-tion of green fuels [Master’s Thesis] (in Spanish). National Polytechnic Institute of Mexico. 2013.
3. Aparicio A, Melgarejo E. Kinetics of the HDO reaction of vegetable oil to obtain biofuels [Master’s Thesis] (in Spanish). Universidad Central de Venezuela; 2018.
4. Asikimijan N, Lee H, Abdulkareem-Alsultan G, et al. Production of green diesel via cleaner catalytic deoxygenation of Jatropha curcas oil (in Spanish). Journal of Cleaner Production 2016; 167: 1048–1059.
5. Sousa LA, Zotin JL, Teixeira da Silva V. Hydrotreatment of sunflower oil using supported molybdenum carbide. Journal Applied Catalysis A: General 2012; 449: 105–111.
6. Han J, Duann J, Chen P, et al. Carbon-supported molybdenum carbide catalysts for the conversion of vegetable oils. ChemSusChem 2012; 5(4): 727–733.
7. Wang F, Jiang J, Wang K, et al. Activated carbon supported molybdenum and tung-sten carbides for hydrotreatment of fatty acids into green diesel. Fuel 2018; 228: 103–111.
8. Puello-Polo E, Gutiérrez-Alejandre A, González G, et al. Relationship between sul-fidation and HDS catalytic activity of activated carbon supported Mo, Fe–Mo, Co–Mo and Ni–Mo carbides. Catalysis Letters 2010; 135(3–4): 212–218.
9. Horvarth GK. Method for the calculation of effective poro size distribution in mo-lecular sieve carbon. Journal of Chemical Engineering of Japan 1983; 16(6): 470–475.
10. Power Diffraction File, ICDD. Newtown Square, Philadelphia, USA. 1995.
11. Sing KSW, Everett DH, Haul RAW, et al. Reporting physisorption data for gas/solid systems with special reference to the determination of surface area and porosity (Recommendations 1984). Pure and Applied Chemistry1985; 57(4): 603–619.
12. Puello-Polo E, Ayala-G M, Brito JL. Sulfidability and thiophene hydrodesulfu-rization activity of supported NiMo carbides. Catalysis Communications 2014; 53: 9–14.
13. Puello-Polo E, Brito JL. Effect of the type of precursor and the synthesis method on thiophene hydrodesulfurization activity of activated carbon supported Fe-Mo, Co-Mo and Ni-Mo carbides. Journal of Molecular Catalysis A: Chemical 2008; 281: 85–92.
14. Topsoe NY, Topsoe H. Characterization of the structures and active sites in sul-fided CoMoAl2O3 and NiMoAl2O3 catalysts by NO chemisorption. Journal of Ca-talysis 1983; 84(2): 386–401.
15. Cid R, Pechi G. Potentiometric method for determining the number and relative strength of acid sites in colored catalysts. Applied Catalysis 1985; 14: 15–21.
16. Arora P, Ojagh H, Woo J, et al. Investigating the effect of Fe as a poison for cat-alytic HDO over sulfided NiMo alumina catalysts. Applied Catalysis B: Environ-mental 2018; 227: 240–251.
17. Hancsók J, Eller Z, Polczmann G, et al. Sustainable production of bioparaffins. Chemical Engineering Transactions 2013; 35: 1027–1032.
18. Volonterio E, Bussi J, Castiglioni J, et al. Catalytic hydrotreating of vegetable oils for the production of liquid biofuels. Magazine of the Technological Laboratory of Uruguay 2017; 14: 37–43.
19. Hollak S, Gosselink R, Van Es D, et al. Comparison of tungsten and molybdenum carbide catalysts for the hydrodeoxygenation of oleic acid. ACS Catalysis 2013; 3(12): 2837–2844.
20. Tobam M, Abe Y, Kuramochi H, et al. Hydrodeoxygenation of waste vegetable oil over sulfide catalysts. Catalysis Today 2010; 164(1): 533–537.
DOI: https://doi.org/10.24294/ace.v5i1.1450
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