Oxide passivated Ni-supported Ru nanoparticles in silica: A new catalyst for low-temperature carbon dioxide methanation

[Display omitted] •The non-alloyed Ni supported nano-Ru(Re, Rh, Ir or Pd) catalysts were synthesized.•Nano-Ru/Ni forms oxide passivated Ni-supported Ru nanoparticles.•Nano-Ru/Ni is highly efficient and selective catalyst of CO2 methanation at 200°C.•Nano-Re/Ni is highly efficient and selective catal...

Full description

Saved in:
Bibliographic Details
Published in:Applied catalysis. B, Environmental Environmental, 2017-06, Vol.206, p.16-23
Main Authors: Polanski, Jaroslaw, Siudyga, Tomasz, Bartczak, Piotr, Kapkowski, Maciej, Ambrozkiewicz, Weronika, Nobis, Agata, Sitko, Rafał, Klimontko, Joanna, Szade, Jacek, Lelątko, Józef
Format: Article
Language:English
Subjects:
Carbon dioxide
Carbon-dioxide conversion
Catalysis
Catalysts
Deactivation
Low temperature
Methanation
Methane
Nano-Re/Ni catalyst
Nano-Ru/Ni catalyst
Nanocatalysis
Nanoparticles
Nickel
Passivity
Silica
Silicon dioxide
Temperature effects
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:[Display omitted] •The non-alloyed Ni supported nano-Ru(Re, Rh, Ir or Pd) catalysts were synthesized.•Nano-Ru/Ni forms oxide passivated Ni-supported Ru nanoparticles.•Nano-Ru/Ni is highly efficient and selective catalyst of CO2 methanation at 200°C.•Nano-Re/Ni is highly efficient and selective catalyst of the highest TOF at 460°C. We tested the catalytic performance of Ni-supported Ru nanoparticles in silica for the first time. The method for supporting Ru nanoparticles on Ni included the formation of nano-Ru/nano-SiO2, from which silica was digested in the presence of Ni. This provided a nano-Ru/Ni catalyst with an oxide passivation layer on the surface in which unalloyed metallic Ru and Ni were detected. This system, which was tested as a potential methanation catalyst, appears to be highly productive and efficient at low temperature, e.g. ca. 100% conversion can be achieved at ca. 200°C at a high TOF value of 940h−1. The longer reaction duration deactivated the catalyst by carbon deposition; however, it did not destroy the catalyst, which could be fully reactivated by hydrogen treatment. In turn, the highest methane productivity (among nano-Re, Rh, Ir or Pd/Ni) given by TOF value of ca. 13855h−1 at higher temperature (460°C) was observed for the nano-Re/Ni catalyst.
ISSN:0926-3373
1873-3883
DOI:10.1016/j.apcatb.2017.01.017