Document Detail

Performance of heterogeneous ZrO2 supported metaloxide catalysts for brown grease esterification and sulfur removal.
MedLine Citation:
PMID:  21078551     Owner:  NLM     Status:  In-Process    
In order to achieve a viable biodiesel industry, new catalyst technology is needed which can process a variety of less expensive waste oils, such as yellow grease and brown grease. However, for these catalysts to be effective for biodiesel production using these feedstocks, they must be able to tolerate higher concentrations of free fatty acids (FFA), water, and sulfur. We have developed a class of zirconia supported metaloxide catalysts that achieve high FAME yields through esterification of FFAs while simultaneously performing desulfurization and de-metallization functions. In fact, methanolysis, with the zirconia supported catalysts, was more effective for desulfurization than an acid washing process. In addition, using zirconia supported catalysts to convert waste grease, high in sulfur content, resulted in a FAME product that could meet the in-use ASTM diesel fuel sulfur specification (<500 ppm). Possible mechanisms of desulfurization and de-metallization by methanolysis were proposed to explain this activity.
Manhoe Kim; Craig DiMaggio; Shuli Yan; Huali Wang; Steven O Salley; K Y Simon Ng
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2010-10-30
Journal Detail:
Title:  Bioresource technology     Volume:  102     ISSN:  1873-2976     ISO Abbreviation:  Bioresour. Technol.     Publication Date:  2011 Feb 
Date Detail:
Created Date:  2011-01-10     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9889523     Medline TA:  Bioresour Technol     Country:  England    
Other Details:
Languages:  eng     Pagination:  2380-6     Citation Subset:  IM    
Copyright Information:
Copyright © 2010 Elsevier Ltd. All rights reserved.
National Biofuels Energy Laboratory, Next Energy, USA.
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