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See detailSynthesis of Ni / γ-Al2O3 catalysts by the sol-gel method for the catalytic reforming of glycerol
Solis Garcia, Hugo Fernando ULiege

Poster (2019, March 04)

Nickel supported gamma alumina catalysts have been developed for the use in glycerol reforming applications. The catalysts were developed using the sol-gel method and characterized using TPR, BET, XRD ... [more ▼]

Nickel supported gamma alumina catalysts have been developed for the use in glycerol reforming applications. The catalysts were developed using the sol-gel method and characterized using TPR, BET, XRD, TEM, and ICP techniques. The catalysts were prepared with different precursors; two nickel precursors: nickel acetate (Ni(CH COO) .2H O) and nickel nitrate (Ni(NO ) .6H O), two different alumina precursors: aluminum tri-sec-butoxide (C H AlO ) and aluminum isopropoxide Al(O-iC H ) , two funtionalized silicon precursors: EDAS ((CH O) Si(CH ) NHCH CH NH ) and AMS (H N(CH ) Si(OCH ) ), and two different solvents: 2-methoxyethanol (CH OCH CH OH) and 2 ethoxyethanol (C H OCH CH OH) in order to determine the texture, morphology and crystallographic properties of each catalysis and select the best preparation route. Only the formation of γ-Al O is aimed in order to use these alumina materials catalytic supports because of it present high specific surface area and pore volume values. So it was developed a synthesis sol-gel procedure for the cogelation between the funtionalized silicon precursors and alumina precursors. For this purpose, a certain weight percent of Ni salt was added to a solvent and a silicon precursor with continuous stirring. Then, a certain amount of alumina precursor and additionally another solution of solvent and water were added. The sample was dried at 80 °C and atmospheric pressure for 3 days, after that, using a controlled ramp, the pressure decreased to 10 mbar for 3 days and the temperature was increased to 150 °C. The samples were calcined at two different temperatures (550°C and 900°C) for 8 h. Finally, the catalysts were reduced at reduction temperature of 350°C for approximately 2-3 h. Hydrogen was utilized as a reducing gas at a flow rate of 60 mL/min. From the results obtained, it was observed that the catalysts prepared with nickel acetate, 2-methoxyethanol and EDAS present a great stability in their structure, the presence of γ-Al2O3 was confirmed by XRD analysis, Ni metal particles doped in gamma alumina were noted using TEM analysis. The calculation of the crystal size using the Scherrer equation determined average particle sizes between 8-40 nm depending on the Ni concentration of the catalyst. According to the BET analysis, it was determined that samples present TYPE I & II isotherms, and microporous & mesoporous solids depending on the Ni concentration. The catalysts presented a BET surface area between 250-515 m /g and average pore size between 2 to 7 nm. [less ▲]

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See detailDiseño y Simulación de un Reactor de Reformado Catalítico de Lecho Fijo para Obtener Gas de Síntesis a partir de Glicerol
Solis Garcia, Hugo Fernando ULiege; Manosalvas, Jhonattan; De la Rosa, Andrés et al

Poster (2018, August 03)

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See detailCatalytic reforming of biomass gasification tars with bimetallic catalysts
Claude, Vincent; Solis Garcia, Hugo Fernando ULiege; Geens, Jérémy ULiege et al

Poster (2018, July 11)

The thermochemical method called “biomass gasification” is generating emphatic interest for the production of bio-Syngas (CO + H2) since this process presents the advantage of being renewable without ... [more ▼]

The thermochemical method called “biomass gasification” is generating emphatic interest for the production of bio-Syngas (CO + H2) since this process presents the advantage of being renewable without emitting CO2. However, in practical applications, there are still some technical problems due to high tars concentration in the outlet gas which can condensate and clog the pipes. The objectives of this project is to synthesize, characterize and evaluate the catalytic performances of Ni/γ-Al2O3 catalysts doped with different metals (Cu, Co, Mo, Mn, Fe). [less ▲]

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See detailDiseño de una Planta de Coquización Retardada para Procesar residuos de petróleo
Solis Garcia, Hugo Fernando ULiege; Sigcha Cordero, Diana Alejandra; De la Rosa, Andrés

in PERFILES (2017), 2 - 18(Julio - Diciembre), 20-26

Simulation and design of a delayed coking plant for the treatment of oil waste with 6.5° API co­ming from two visbreaking units of Esmeraldas Refinery in order to obtain hydrocarbons of higher added value ... [more ▼]

Simulation and design of a delayed coking plant for the treatment of oil waste with 6.5° API co­ming from two visbreaking units of Esmeraldas Refinery in order to obtain hydrocarbons of higher added value such as: LPG, naphthas and gas oils. The main physicochemical properties of visbreaking units' residues were determined by labo­ratory essays and the characterization of the fluid was simulated using a commercial software. The operating conditions of the visbreaking units were obtained and with this information the simulation and mass balance of the delayed coking plant were carried out. Equipment and pipes of the plant were sized using criteria and design recommendations established by specialized bibliography. The products' yields obtained by simulation are: 7.5 % of gases (C4-), 9.27 % of naphtha, 20.62% of light gas oil (LCGO), 32.02% of heavy gas oil (HCGO) and 30.59 % coke. [less ▲]

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See detailElaboration of an Easy Aqueous Sol-Gel Method for the Synthesis of Micro- and Mesoporous γ-Al2O3 Supports
Claude, Vincent; Solis Garcia, Hugo Fernando ULiege; Wolfs, Cédric ULiege et al

in Advances in Materials Physics and Chemistry (2017), 7

An aqueous sol-gel method for the synthesis of γ-Al2O3 supports has been developed for the use in tar reforming applications. It was determined the influences of two different aluminum precursors ... [more ▼]

An aqueous sol-gel method for the synthesis of γ-Al2O3 supports has been developed for the use in tar reforming applications. It was determined the influences of two different aluminum precursors (aluminum sec -butoxide (Al[OCH(CH3)CH2CH3]3) and aluminum nitrate (Al(NO3)3)) on the textural and crystallographic properties of Al2O3 supports. Only the formation of γ- Al2O3 is aimed in order to use these alumina materials as catalytic supports, because it presents high specific surface area and pore volume values. Additionally, the synthesis of γ-Al2O3 was realized with the use of a functionalized silicon precursor, [3-(2-aminoethylamino)propyl]trimethoxysilane, called EDAS. By the presence of an ethylenediamine group in this molecule, it is possible to chelate metallic ions and to highly increase their dispersion at a molecular level during the synthesis of metallic catalysts supported on alumina, which is an asset for catalytic applications. So it was developed a synthesis sol-gel procedure for the cogelation between the functionalized silicon alkoxide EDAS and alumina precursor. The alumina supports synthesized with Al(NO3)3 as precursor presented higher porous values than the ones obtained with aluminium sec-butoxide precursor. Since nitrate salts are much easier to handle than alkoxides, these observations allowed validating Al(NO3)3 as aluminum source for the future synthesis procedures for metallic catalysts supported on alumina. [less ▲]

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