Name: Identification of C2-C5 products from CO2 hydrogenation over PdZn/TiO2-ZSM-5 hybrid catalysts - data

Description: A PdZn/TiO2 methanol catalysts was physically mixed with different ZSM-5 zeolites with different acidity (Si/Al ratio of 23, 50 and 80). The phisical mixture of two different catalysts for tandem reactions are known as hybrid catalysts. PdZn/TiO2-ZSM-5 hybrid catalysts were employed for the CO2 hydrogenation to CH3OH, consecutive CH3OH dehydration to dimethyl ether (DEM) and further CH3OH/DME conversion to hydrocarbons (20 bar, CO2/H2/N2 = 1/3/1, 30 ml min-1, 240-360 °C). PdZn/TiO2 catalyst prior and after reaction was characterised by XRD, XPS and XAS. Characterisation shows that the bulk PdZn phase is stable during reaction, however, some surface PdZn decomposition to Pd and ZnO might occur. CH3OH produtivity over PdZn/TiO2 is limited by equilibrium above 270-300 °C, the combination with an acid catalyst (ZSM-5 zeolite) promotes CH3OH dehydration to DME, increasing the total CH3OH productivity. CH3OH and DME react over acid sites on ZSM-5 through the MTH and DMETH to produce olefins. Synthesise olefins however undergo further hydrogeation to the corresponding alkanes, likely over PdZn hydrogenation active sites. Thus, restricting chain growth for the production of hydrocarbons on the gasoline range. Research results based upon these data are published at https://doi.org/10.1039/D0FD00135J

DOI: 10.17035/d.2021.0129194354

Location: https://research.cardiff.ac.uk/converis/portal/detail/Dataset/129194354?auxfun=&lang=en_GB

Resository: https://research.cardiff.ac.uk

Start date: 2019-06-01 00:00:00 UTC

End date:

Related Article: Identification of C2–C5 products from CO2 hydrogenation over PdZn/TiO2–ZSM-5 hybrid catalysts

Back