High-Active Metallic-Activated Carbon Catalysts for Selective Hydrogenation

CARRARA, NICOLÁS; ALMANSA, MARÍA CRISTINA; QUIROGA, MÓNICA E.; BETTI, CAROLINA; GUTIERREZ, LAURA; COLOMA-PASCUAL, FERNANDO; LEDERHOS, CECILIA R.; MIRANDA, CRISTIAN; CARRARA, NICOLÁS; ALMANSA, MARÍA CRISTINA; QUIROGA, MÓNICA E.; BETTI, CAROLINA; GUTIERREZ, LAURA; LEDERHOS, CECILIA R.; COLOMA-PASCUAL, FERNANDO; MIRANDA, CRISTIAN

International Journal of Chemical Engineering

HINDAWI

Año: 2018 vol. 2018 p. 1 - 11

1687-806X

A series of low-loaded metallic-activated carbon catalysts were evaluated during the selective hydrogenation of a medium-chainalkyne under mild conditions. )e catalysts and support were characterized by ICP, hydrogen chemisorption, Raman spectroscopy,temperature-programmed desorption (TPD), temperature-programmed reduction (TPR), X-ray diffraction (XRD),Fourier transform infrared spectroscopy (FTIR micro-ATR), transmission electronic microscopy (TEM), and X-ray photoelectronicspectroscopy (XPS). When studying the effect of the metallic phase, the catalysts were active and selective to the alkenesynthesis. NiCl/C was the most active and selective catalytic system. Besides, when the precursor salt was evaluated, PdN/C wasmore active and selective than PdCl/C. Meanwhile, alkyne is present in the reaction media, and geometrical and electronic effectsfavor alkene desorption and so avoid their overhydrogenation to the alkane. Under mild conditions, nickel catalysts areconsiderably more active and selective than the Lindlar catalyst.