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

Fuels and Petrochemicals Division
AIChE Annual Meeting
November 6, 2013 - 10:15am-10:30am

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.

Professional Development Hours
0.5 PDHs
You will be able to download and print a certificate for these PDH credits once the content has been viewed. If you have already viewed this content, please click here to login.
Presenter(s): 

Would you like to access this content?

No problem. You just have to complete the following steps.

You have completed 0 of 2 steps.

  1. Log in

    You must be logged in to view this content. Log in now.

  2. Purchase Technical Presentation

    You must purchase this technical presentation using one of the options below.
    If you already purchased this content recently, please click here to refresh the system's record of ownerships.

Pricing

Credits 0.5 Use credits
List Price $25.00 Buy now
AIChE Members $15.00 Buy now
AIChE Fuels and Petrochemicals Division Members Free Free access
AIChE Undergraduate Student Members Free Free access
AIChE Graduate Student Members Free Free access