For the first time, catalytic conversion of CO2 to CH4 (Sabatier reaction) has been studied on real vehicle exhaust. Preliminary tests were carried out on model gas mixtures using as reactants a N2/CO2 gas mixture (CO2 = 9.5 vol% concentration similar to that of road vehicle exhaust) and pure hydrogen. Ruthenium powder (5 wt%) on alumina was used as catalyst, in a fixed bed cylindrical reactor. The operating conditions investigated are P = 1 atm, temperature in the range 160–320 °C, contact time 0.6–1.29 s, and H2/CO2 ratio 2.75–4.11. Experimental conditions were varied to study the effect of temperature, contact time, and H2/CO2 ratio on conversion yield, and selectivity of the process. Once evaluated the performance of the catalytic process and identified the best operating conditions, real exhausts of a two-wheel motorcycle and a fourwheel gasoline vehiclewere treated with the same experimental apparatus. Analyses of physical and chemical characterization of catalyst samples before and after the use were also performed. Results show that, even though best performances are generally obtained with model mixtures, high CO2 conversion together with high yield and selectivity in CH4 can be obtained with real vehicle exhausts too. Moreover, phenomena causing the deactivation of catalyst have not been observed. Results seem to indicate good opportunities for the development of the process.

Catalytic Conversion of CO2 to CH4 with a Ru Catalyst: Application at Vehicle Exhaust / Murena, F.; Prati, M. V.. - In: EMISSION CONTROL SCIENCE AND TECHNOLOGY. - ISSN 2199-3637. - 3:3(2017), pp. 220-229. [10.1007/s40825-017-0067-1]

Catalytic Conversion of CO2 to CH4 with a Ru Catalyst: Application at Vehicle Exhaust

Murena, F.
;
2017

Abstract

For the first time, catalytic conversion of CO2 to CH4 (Sabatier reaction) has been studied on real vehicle exhaust. Preliminary tests were carried out on model gas mixtures using as reactants a N2/CO2 gas mixture (CO2 = 9.5 vol% concentration similar to that of road vehicle exhaust) and pure hydrogen. Ruthenium powder (5 wt%) on alumina was used as catalyst, in a fixed bed cylindrical reactor. The operating conditions investigated are P = 1 atm, temperature in the range 160–320 °C, contact time 0.6–1.29 s, and H2/CO2 ratio 2.75–4.11. Experimental conditions were varied to study the effect of temperature, contact time, and H2/CO2 ratio on conversion yield, and selectivity of the process. Once evaluated the performance of the catalytic process and identified the best operating conditions, real exhausts of a two-wheel motorcycle and a fourwheel gasoline vehiclewere treated with the same experimental apparatus. Analyses of physical and chemical characterization of catalyst samples before and after the use were also performed. Results show that, even though best performances are generally obtained with model mixtures, high CO2 conversion together with high yield and selectivity in CH4 can be obtained with real vehicle exhausts too. Moreover, phenomena causing the deactivation of catalyst have not been observed. Results seem to indicate good opportunities for the development of the process.
2017
Catalytic Conversion of CO2 to CH4 with a Ru Catalyst: Application at Vehicle Exhaust / Murena, F.; Prati, M. V.. - In: EMISSION CONTROL SCIENCE AND TECHNOLOGY. - ISSN 2199-3637. - 3:3(2017), pp. 220-229. [10.1007/s40825-017-0067-1]
File in questo prodotto:
File Dimensione Formato  
CO2 Pubblicato.pdf

solo utenti autorizzati

Descrizione: Articolo
Tipologia: Documento in Pre-print
Licenza: Accesso privato/ristretto
Dimensione 2.48 MB
Formato Adobe PDF
2.48 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/702755
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 3
  • ???jsp.display-item.citation.isi??? ND
social impact