Second-generation biofuels by co-processing catalytic pyrolysis oil in FCC units

作者：Thegarid N; Fogassy G; Schuurman Y^*; Mirodatos C; Stefanidis S; Iliopoulou E F; Kalogiannis K; Lappas A A

来源：Applied Catalysis B: Environmental , 2014, 145: 161-166.

DOI：10.1016/j.apcatb.2013.01.019

• Renewable feedstock
• Refining
• Catalytic cracking
• Biomass
• ZSM-5

Previous research showed that hydrodeoxygenated (HDO) pyrolysis-oils could successfully be co-processed with vacuum gasoil (VGO) in a labscale fluid catalytic cracking (FCC) unit to bio-fuels. Typically the hydrodeoxygenation step takes place at similar to 300 degrees C under 200-300 bar of hydrogen. Eliminating or replacing this step by a less energy demanding upgrading step would largely benefit the FCC co-processing of pyrolysis oils to bio-fuels. In this paper a bio-oil that has been produced by catalytic pyrolysis (catalytic pyrolysis oil or CPO) is used directly, without further upgrading, in catalytic cracking co-processing mode with VGO. The results are compared to the co-processing of upgraded (via HDO) thermal pyrolysis oil. Though small but significant differences in the product distribution and quality have been observed between the co-processing of either HDO or CPO, they could be corrected by further catalyst development (pyrolysis and/or FCC), which would eliminate the need for an up-stream hydrodeoxygenation step. Moreover, the organic yield of the catalytic pyrolysis route is estimated at approximately 30 wt.% compared to an overall yield for the thermal pyrolysis followed by a hydrodeoxygenation step of 24 wt.%.

• 出版日期2014-2