Catalysts play a key role in the hydrotreating processes used for production of clean fuels from petroleum distillates and residues. Hydrotreating catalysts usually consist of molybdenum (Mo) supported on an alumina carrier with promoters such as cobalt (Co) or nickel (Ni) (Al-Dalama  and Stanislaus, 2004). The catalysts enhance the removal of sulfur, nitrogen and other undesirable contaminants present in the refinery streams by promoting hydrodesulfurization (HDS), hydrodenitrogenation (HDN) and hydrogenation (HYD) reactions.The main objective of the present study is to examine the influence of chelating agents on the reducibility of Al2O3 and SiO2-Al2O3-supported CoMo catalysts.  Since metal ions on oxides in weak interaction with the support surface will be reduced more easily than those strongly bound, metal-support interactions could be assessed by examining their reduction behavior. Temperature programmed reduction (TPR) with hydrogen is a widely used technique for the characterization of reducible solids and catalysts. TPR has been applied successfully for the characterization of molybdena based hydrotreating catalysts. The HDS activities of CoMo catalysts prepared with and without EDTA were tested and compared.

Effect of EDTA on the reducibility of CoMo catalyst supported on Al2O3 and SiO2-Al2O3

245th National Meeting (2013)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.