Synthesis of NiO/Y2O3/ZrO2 Catalysts Prepared by One-Step Polymerization Method and Their Use in the Syngas Production from Methane

Autor(es)

Asencios, Yvan J. O. ; Assaf, Elisabete M.

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF CHEMICAL ENGINEERING; v. 2018, p. 11-pg., 2018-01-01.

Resumo

In this work, the production of Syngas (H-2/CO) from oxidative reforming of methane (ORM) and partial oxidation of methane (POM) over NiO/Y2O3/ZrO2 catalysts was studied. The nickel concentration was varied (ranging from 0 to 40 wt.%) aiming to optimize the performance in ORM and POM reactions; these reactions were carried out at 750 degrees C and 1 atm for 6 hours. The catalysts were prepared by the one-step polymerization method (OSP) and characterized by different techniques., is method led to production of materials of smaller crystallite size than others of similar composition prepared under other methods; the catalysts presented good nickel dispersion, well-defined crystalline structure, and well-defined geometrical morphology. Additionally, the OSP method was advantageous because it was carried out in a single calcination step. The catalyst containing 20% wt. of nickel (20Ni20YZ sample) showed the highest methane conversion, high selectivity to H-2 and CO, low carbon deposition rates, and, curiously, the best geometric morphology. The results of this paper also demonstrated that the nickel concentration in the mixture strongly influenced the morphology of the catalysts; therefore, the morphology also influenced the catalytic performances during the Syngas production reactions. (AU)

• Processo FAPESP: 14/24940-5 - Desenvolvimento de catalisadores sólidos baseados em óxidos semicondutores para produção de hidrogênio a partir da fotólise de água
• Beneficiário: Yvan Jesus Olortiga Asencios
• Modalidade de apoio: Auxílio à Pesquisa - Regular