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Catalysis in Green Chemistry and Engineering

ISSN Imprimir: 2572-9896
ISSN On-line: 2572-990X

Catalysis in Green Chemistry and Engineering

DOI: 10.1615/.2018021105
pages 127-138

MESOPOROUS Ni/NiO-SiO2 FOR EFFECTIVE HYDRODEOXYGENATION OF STEARIN INTO DIESEL RANGE HYDROCARBONS

Hari Singh
CSIR-Indian Institute of Petroleum, Dehradun 248005, India; Academy of Scientific and Innovative Research, CSIR-IIP, Dehradun 248005, India
Anil K. Sinha
Indian Institute of Petroleum, Council of Scientific and Industrial Research, Dehradun-248005, India; Academy of Scientific and Innovative Research, CSIR-IIP, Dehradun 248005, India

RESUMO

Mesoporous nickel stabilized with silica species as a hydrogenation catalyst to convert a glyceride model compound (stearin) to diesel fuel is studied. The catalyst was synthesized by the hydrothermal method using organosilane template as a source of isolated Si to stabilize the Ni structure as well as to create mesopores. The catalyst was characterized by nitrogen sorption, X-ray diffraction (XRD), transmission electron microscopy (TEM), H2 chemisorption, X-ray photoelectron spectroscopy (XPS), ammonia temperature-programed desorption (NH3-TPD), and temperature-programmed reduction (TPR). The material has a high surface area (205 m2/g), average crystallite size (5.4 nm) by XRD, Ni particle size (7 nm) by H2 chemisorption, and 20% metal dispersion. The acidity of the catalyst was measured to be 0.28 mmol/g. Catalyst life and activity was measured in a fixed bed reactor. Nearly complete glyceride conversion (100%) and 88% (C10–C17) selectivity have been achieved at 350°C. The conversion and yield of diesel increased with an increase in temperature from 325 to 350°C.