Bifunctional Catalysts With Improved Hydrothermal Stability for the Hydrolytic Hydrogenation of Cellulose

Developed by: AIChE
  • Type:
    Conference Presentation
  • Conference Type:
    AIChE Annual Meeting
  • Presentation Date:
    November 6, 2013
  • Duration:
    15 minutes
  • Skill Level:
  • PDHs:

Share This Post:

Once the content has been viewed and you have attested to it, you will be able to download and print a certificate for PDH credits. If you have already viewed this content, please click here to login.

The production of glucose and/or sorbitol from the hydrolytic hydrogenation of cellulose , offers the potential to be used as a renewable feedstock in a biorefinery for the production of fuels and value added chemicals. Here we report the results of the study of the effect of cellulose crystallinity , cellulose/catalyst ratio , reaction temperature and reaction time on the catalytic performance for the conversion of cellulose into sorbitol.  We studied a series of single , binary and ternary metal oxide supports with a range of surface acidity and phosphated niobic acid.  Ru was supported using evaporative deposition on the supports.  The catalytic materials were characterized using nitrogen adsorption , X-Ray Diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR).  Ruthenium supported on NbOPO4 displayed the best catalytic performance with hexitols yields of about 45% at 100% cellulose conversion.  All materials suffer a decrease in their surface areas after treatment in hot water.  However , treating Ru/NbOPO4 in water at 210°C and 230 °C and 35 bar H2 for 24 h or 48 h caused a slight decrease in cellulose conversion , but a significant increase in hexitol and hydrogenolysis products yield.  Ru/Nb2O5 (HY 340) and the equivalent amount of phosphoric acid present in Ru/NbOPO4 give essentially the same conversion as Ru/NbOPO4 but a lower yield to sugar alcohols and a higher yield to hydrogenolysis products.  Decreasing cellulose crystallinity and cellulose/catalyst ratio , increases the cellulose conversion and hexitols yield for Ru/NbOPO4.




Do you already own this?

Log In for instructions on accessing this content.


AIChE Member Credits 0.5
AIChE Members $15.00
AIChE Fuels and Petrochemicals Division Members Free
AIChE Undergraduate Student Members Free
AIChE Graduate Student Members Free
Non-Members $25.00