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Importance of Decomposition Reactions for Catalytic Conversion of Tar and Light Hydrocarbons: An Application with an Ilmenite Catalyst

Huong Nguyen (Institutionen för energi och miljö, Energiteknik) ; Nicolas Berguerand (Institutionen för energi och miljö, Energiteknik) ; Georg L.Schwebel ; Henrik Thunman (Institutionen för energi och miljö, Energiteknik)
Industrial & Engineering Chemistry Research (0888-5885). Vol. 55 (2016),
[Artikel, refereegranskad vetenskaplig]

This work elucidates the contributions of different decomposition reactions, namely, steam reforming, hydro-cracking, dry reforming, and (thermal) cracking reactions, to the conversion of tar and light hydrocarbons during the catalytic cleaning of a biomass-derived raw gas. A raw gas that contained a high content of steam and that was produced in the Chalmers indirect biomass gasifier was taken as the reference. The representative reactions associated with the upgrading of the given raw gas were identified to investigate the individual effects and thereafter reassembled to investigate the synergistic effects. Ilmenite was used as the catalyst, and the temperature range of 750°−900 °C was the focus. For this process, it was discovered that the complete steam reforming, steam deal-kylation, and hydro-cracking reactions are important, whereas the dry reforming reaction is not relevant. In addition, the water gas shift reaction occurs significantly and can promote the hydro- cracking reaction. These results provide insights into the most important reactions for inclusion in kinetic models of catalytic gas cleaning.



Denna post skapades 2017-07-04.
CPL Pubid: 250374

 

Institutioner (Chalmers)

Institutionen för energi och miljö, Energiteknik (2005-2017)

Ämnesområden

Katalys

Chalmers infrastruktur

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A mechanistic description of the evolution of aromatic tar during catalytic upgrading of the raw gas produced from biomass steam gasification