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Title: The effect of CO on CO2 methanation over Ru/Al2O3 catalysts: a combined steady-state reactivity and transient DRIFT spectroscopy study

Journal Article · · Applied Catalysis B: Environmental

The reactivity of Ru/Al2O3 catalysts in the hydrogenation of CO/CO2 gas mixtures is investigated in this work. Accordingly kinetic measurements are carried out at process conditions of industrial interest (i.e., at high COx per-pass conversion and with concentrated COx/H2 streams), and the surface species on the catalyst are investigated through transient DRIFTS-MS analysis. The catalyst shows gradual deactivation when the methanation is carried out in the presence of CO in the gas feed at low temperatures (200-300 °C). However, stable performance is observed at higher temperatures, showing CH4 yields even higher than those observed during methanation of a pure CO2 feed. The catalyst deactivation at low temperature is reversible as thermal treatments at temperatures above 350 °C are able to restore the catalytic activity. DRIFTS-MS experiments revealed that CO2 methanation involves a reaction pathway where CO2 is adsorbed as bicarbonate on Al2O3 and successively hydrogenated to methane on Ru, passing through formate and carbonyl intermediates. In the presence of CO at low temperatures, the catalyst shows a higher CO coverage of the Ru sites, a larger formate coverage of alumina sites and the presence of adsorbed carbonaceous species, identified as hydrocarbon and carboxylate species. Carboxylates remain on the surface, effectively blocking adsorption sites thus leading to catalyst deactivation. However, working above the carboxylate decomposition temperature ensures a clean catalyst surface, resulting in stable and high performance in CO/CO2 methanation. Catalyst preparation, characterization and testing activity were carried out with a joint project between the Politecnico di Milano and the Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA), which is gratefully acknowledged. The authors gratefully acknowledge the financial support of the DRIFTS experiments by the US Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences, Chemical Sciences, Geosciences, and Biosciences Division. L.F. also acknowledges the Pacific Northwest National Laboratory (PNNL) for the financial support during his permanence as visiting student.

Research Organization:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
OSTI ID:
1776575
Report Number(s):
PNNL-SA-134496
Journal Information:
Applied Catalysis B: Environmental, Vol. 256
Country of Publication:
United States
Language:
English

References (69)

Recent Advances in CO 2 Capture and Utilization journal November 2008
Catalysis for the Valorization of Exhaust Carbon: from CO 2 to Chemicals, Materials, and Fuels. Technological Use of CO 2 journal November 2013
New trends in the development of heterogeneous catalysts for electrochemical CO 2 reduction journal July 2016
Recent advances in catalytic hydrogenation of carbon dioxide journal January 2011
A critical review of CO2 photoconversion: Catalysts and reactors journal April 2014
Recent advances in methanation catalysts for the production of synthetic natural gas journal January 2015
CO 2 methanation over heterogeneous catalysts: recent progress and future prospects journal January 2015
Power to Gas projects review: Lab, pilot and demo plants for storing renewable energy and CO2 journal March 2017
Review on methanation – From fundamentals to current projects journal February 2016
Renewable Power-to-Gas: A technological and economic review journal January 2016
Material constraints related to storage of future European renewable electricity surpluses with CO2 methanation journal July 2016
Methanation of CO2 - storage of renewable energy in a gas distribution system journal December 2014
Production of synthetic natural gas (SNG) from coal and dry biomass – A technology review from 1950 to 2009 journal August 2010
A review of the technologies, economics and policy instruments for decarbonising energy-intensive manufacturing industries journal February 2014
Catalytic Methanation journal January 1974
Characterization of surface processes at the Ni-based catalyst during the methanation of biomass-derived synthesis gas: X-ray photoelectron spectroscopy (XPS) journal October 2007
Deactivation of nickel-based catalysts during CO methanation and disproportionation journal October 1987
Catalysis mechanisms of CO 2 and CO methanation journal January 2016
Hydrogenation of surface carbon on alumina-supported nickel journal May 1979
Atomic-scale imaging of carbon nanofibre growth journal January 2004
Catalytic and adsorption studies for the hydrogenation of CO2 to methane journal June 2014
CO 2 Reduction on Supported Ru/Al 2 O 3 Catalysts: Cluster Size Dependence of Product Selectivity journal October 2013
Transient drift spectroscopy for the determination of the surface reaction kinetics of CO2 methanation journal January 1994
Mechanistic Study of the Selective Methanation of CO over Ru/TiO 2 Catalysts: Effect of Metal Crystallite Size on the Nature of Active Surface Species and Reaction Pathways journal February 2017
CO2 methanation on Ru-doped ceria journal March 2011
CO 2 methanation by Ru-doped ceria: the role of the oxidation state of the surface journal January 2015
Kinetics of CO2 methanation on a Ru-based catalyst at process conditions relevant for Power-to-Gas applications journal June 2018
Methanation of carbon dioxide on Ru/Al2O3: Catalytic activity and infrared study journal November 2016
CO2 hydrogenation reaction over pristine Fe, Co, Ni, Cu and Al2O3 supported Ru: Comparison and determination of the activation energies journal October 2018
Hydrogenation of Carbon Monoxide and Carbon Dioxide on Supported Ruthenium Catalysts at Moderate Pressures journal December 1965
Insights into the deactivation and reactivation of Ru/TiO2 during Fischer–Tropsch synthesis journal October 2013
Mechanisms of catalyst deactivation journal April 2001
Structure sensitive reactions over supported ruthenium catalysts during Fischer-Tropsch synthesis journal January 1991
Reactive metal volatilization from Ru/Al2O3 as a result of ruthenium carbonyl formation journal July 1986
Heterogeneous methanation: Steady-state rate of CO hydrogenation on supported ruthenium, nickel and rhenium journal November 1975
Deactivation by carbon of Ru/Al2O3 during CO hydrogenation journal August 1983
Heterogeneous methanation: In situ infrared spectroscopic study of Ru/Al2O3 during the hydrogenation of CO journal June 1977
Synthesis of hydrocarbons from CO and H2 over silica-supported Ru: Reaction rate measurements and infrared spectra of adsorbed species journal June 1979
CO Chemisorption and Dissociation at High Coverages during CO Hydrogenation on Ru Catalysts journal April 2013
An in situ infrared study of CO hydrogenation over silica and alumina-supported ruthenium and silica-supported iron journal January 1980
Studies of carbon monoxide hydrogenation over ruthenium using transient response techniques journal February 1982
Mechanistic Study of the Selective Methanation of CO over Ru/TiO 2 Catalyst: Identification of Active Surface Species and Reaction Pathways
  • Panagiotopoulou, Paraskevi; Kondarides, Dimitris I.; Verykios, Xenophon E.
  • The Journal of Physical Chemistry C, Vol. 115, Issue 4 https://doi.org/10.1021/jp106538z
journal September 2010
Mechanistic Studies of Hydrocarbon Combustion and Synthesis on Noble Metals journal June 2008
Reaction Intermediates and Side Products in the Methanation of CO and CO 2 over Supported Ru Catalysts in H 2 -Rich Reformate Gases journal September 2010
Carbon dioxide adsorption and methanation on ruthenium journal May 1981
Hydrogenation of CO2 on group VIII metals II. Kinetics and mechanism of CO2 hydrogenation on nickel journal October 1982
The transient species formed over Ru$z.sbnd;RuOx/TiO2 catalyst in the CO and CO + H2 interaction: FTIR spectroscopic study journal October 1992
In-situ surface and gas phase analysis for kinetic studies under transient conditions The catalytic hydrogenation of CO2 journal March 1997
Kinetic modeling and transient DRIFTS–MS studies of CO2 methanation over Ru/Al2O3 catalysts journal November 2016
Kinetics of the Methanation of Carbon Dioxide over Ruthenium on Titania journal April 1999
Quantitative Analysis of Adsorbate Concentrations by Diffuse Reflectance FT-IR journal May 2007
Effective bulk and surface temperatures of the catalyst bed of FT-IR cells used for in situ and operando studies journal January 2013
Isotopic tracer and NMR studies of carbonaceous species present during CO hydrogenation over Ru/TiO2 journal October 1989
An isotopic tracer study of the deactivation of Ru/Ti02 catalysts during Fischer-Tropsch synthesis journal August 1991
Gas-Uptake, Methanation, and Microcalorimetric Measurements on the Coadsorption of CO and H2over Polycrystalline Ru and a Ru/TiO2Catalyst journal July 1997
Dissecting the steps of CO 2 reduction: 1. The interaction of CO and CO 2 with γ-Al 2 O 3 : an in situ FTIR study journal January 2014
Basic catalysis and catalysis assisted by basicity: FT-IR and TPD characterization of potassium-doped alumina journal June 2011
I.r. spectroscopic study of CO2 adsorption onto η-Al2O3
  • Morterra, Claudio; Zecchina, Adriano; Coluccia, Salvatore
  • Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, Vol. 73, Issue 0 https://doi.org/10.1039/f19777301544
journal January 1977
A case study: surface chemistry and surface structure of catalytic aluminas, as studied by vibrational spectroscopy of adsorbed species journal February 1996
FT-IR study of the adsorption and transformation of formaldehyde on oxide surfaces journal August 1987
Carbon monoxide adsorption on supported ruthenium journal November 1975
FTIR spectroscopic study of the interaction of CO2 and CO2 + H2 over partially oxidized Ru/TiO2 catalyst journal March 1994
FTIR Studies of CO Adsorption on Al 2 O 3 - and SiO 2 -Supported Ru Catalysts journal January 2006
Determination of formate decomposition rates and relation to product formation during CO hydrogenation over supported cobalt journal January 2016
Infrared Study of Coke on Alumina and Zeolite journal February 1994
Chemical adsorption of acetic acid and deuterated acetic acid on Ru(0001), by RAIRS journal September 1998
Mechanistic aspects of the selective methanation of CO over Ru/TiO2 catalyst journal February 2012
Influence of the oxide support reducibility on the CO2 methanation over Ru-based catalysts journal December 2017
Nature and reactivity of the surface species observed over a supported cobalt catalyst under CO/H2 mixtures journal March 2015

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