(678c) Evaluating Zeolite Supported Pt/ZIF-67 with Low Noble-Metal Loading for the Deoxygenation of Saturated and Unsaturated Fatty Acids
In the current study, we evaluate the activity of low platinum loading ZIF-67/zeolite 5A catalysts for the deoxygenation of polyunsaturated linoleic acid (18:2) under nitrogen, hydrogen, and carbon dioxide atmospheres. The results show that a higher degree of unsaturation can cause lower yields to desired alkanes due to the increased reductive demand of the polyunsaturated backbone. Overall, yields to heptadecane (C17) from linoleic acid were as high as 65.3, 63.5, and 58.4% under H2, CO2, and N2 atmospheres, respectively. Reactions in H2 followed hydrodeoxygenation while N2 and CO2 resulted in decarboxylation pathways. Recyclability and textural properties of the catalyst were explored for all reactive atmospheres showing a slight decrease in surface area, good maintenance of crystallinity, and high stability at elevated temperatures by thermogravimetric analysis.