Catalytic Performances of Bi-Metallic Ni-Co Catalysts in Acetic Acid Steam Reforming Reaction: Effect of Mg Incorporation


Sahin S. O., ARBAĞ H., OKTAR N., MÜRTEZAOĞLU K.

INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING, vol.17, no.6, 2019 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 17 Issue: 6
  • Publication Date: 2019
  • Doi Number: 10.1515/ijcre-2018-0164
  • Journal Name: INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Keywords: acetic acid, steam reforming, hydrogen, cobalt, nickel, magnesium, MESOPOROUS ALUMINA CATALYSTS, HYDROGEN-PRODUCTION, MODEL-COMPOUND, SUPPORTED NI, BIO-OIL, THERMODYNAMIC ANALYSIS, PRODUCT DISTRIBUTION, NICKEL-CATALYSTS, BIOMASS, DEACTIVATION
  • Gazi University Affiliated: Yes

Abstract

In this study, mesoporous alumina supported bi-metallic Ni-Co catalysts were synthesized and catalytic performances were investigated in hydrogen production through steam reforming of acetic acid reaction. Mesoporous alumina support was synthesized using a sol-gel method and metals were co-impregnated into the structure of the catalyst. The physicochemical properties of the synthesized materials were characterized by XRD, N-2 adsorption-desorption, SEM and TG-DT analysis. The activity test results showed that the bi-metallic 4Ni-1Co@ SGA catalyst showed high and stable activity in steam reforming of acetic acid, giving a high H-2 selectivity at 750 degrees C. Bi-metallic Ni-Co catalysts showed higher performance than monometallic Co catalyst, yielding less methane production and coke deposition. Co incorporation decreased activity of Ni catalysts at high reaction temperature of 750 degrees C in terms of AcOH conversion; however, improved the activity of Ni catalysts at low reaction temperature of 550 degrees C in terms of AcOH conversion and H-2 Selectivity. Mg incorporation enhanced the coke resistance of the catalyst and further, among the bi-and tri-metallic catalysts, the lowest coke deposition was obtained over Mg incorporated 4Ni-1Co@ SGA catalyst at 750 degrees C.