Jump to main content
Jump to site search


Rh/Ni wet-impregnated Ia3d mesostructured aluminosilicate and r-GO catalyst for hydrodeoxygenation of phenoxy benzene

Abstract

Rh/Ni bimetal supported bifunctional 3D porous aluminosilicate and Rh/Ni supported reduced graphene oxide catalyst was synthesised and evaluated their structural behaviour by XRD, BET-Surface area, FT-IR, NH3-TPD, H2-TPR, ICP-OES, HR TEM-EDAX and XPS analysis. The catalytic activity of Rh/Ni/Al-KIT-6 and Rh/Ni-rGO catalyst was investigated by vapour phase hydrodeoxygenation of diphenyl ether and guaiacol. The Rh/Ni/Al-KIT-6 catalyst exhibited best catalytic performance on vapour phase HDO of diphenyl ether at 420 oC and WHSV 3.6 h-1. In addition, another lignin derived guaiacol was also probed and the desired product of benzene was not achieved on Rh/Ni/Al-KIT-6 and Rh/Ni/r-GO catalyst. Besides, Rh/Ni/Al-KIT-6 catalyst showed excellent stability due to the acidic Al-KIT-6 support which stabilizes the Rh/Ni particles on the surface. Further, the higher dispersion of Rh/Ni specious maximum observed on Rh/Ni/Al-KIT-6 catalyst and it depended on mesoporous support, while Rh/Ni/r-GO catalyst shows larger metal aggregates due to weak Rh/Ni interaction with reduced graphene oxide (r-GO) support. The superior catalytic activity in the C-O bond cleavage of diphenyl ether has been observed in Rh/Ni/Al-KIT-6 catalyst and it has been attributed to the highly dispersed small bimetallic species and further bimetal interaction with acidic mesoporous support has favour the earlier NiO reduction, which was clearly seen by H2-TPR and HR-TEM images. Moreover, the acidic sites present on Rh/Ni/Al-KIT-6 catalyst could favour the C-O bond cleavage of diphenyl ether. The Rh/Ni/Al-KIT-6 catalyst displayed excellent catalytic properties with 60 % benzene selectivity. The enhanced activity of Rh/Ni/Al-KIT-6 was mainly attributed to the bifunctional behaviour with unique cubic morphology support in addition to uniform dispersion of Rh/Ni species.

Back to tab navigation

Publication details

The article was received on 02 Feb 2017, accepted on 12 Jun 2017 and first published on 12 Jun 2017


Article type: Paper
DOI: 10.1039/C7NJ00367F
Citation: New J. Chem., 2017, Accepted Manuscript
  •   Request permissions

    Rh/Ni wet-impregnated Ia3d mesostructured aluminosilicate and r-GO catalyst for hydrodeoxygenation of phenoxy benzene

    A. Pandurangan and S. Pichaikaran, New J. Chem., 2017, Accepted Manuscript , DOI: 10.1039/C7NJ00367F

Search articles by author

Spotlight

Advertisements