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dc.contributor.authorAnderson, Anthony
dc.date.accessioned2024-03-27T20:40:34Z
dc.date.available2024-03-27T20:40:34Z
dc.date.issued2024-03-27
dc.identifier.urihttp://digital.library.wisc.edu/1793/85099
dc.description.abstractCatalytic activity tests were run to elucidate the chemistry and catalyst stability for the hydrodeoxygenation of aliphatic oxygenates over a NiMoSx/Al2O3 catalyst at different pretreatments at hydropyrolysis conditions using glycerol as a thermally stable biomass model feedstock in a continuous flow reactor. Reactivity metrics were developed to quantify and compare the reactivity of NiMo for deoxygenation, hydrogenation, and C-C cleavage. Activity experiments showed sulfided NiMo and reduced NiMo catalysts had similar deoxygenation and hydrogenation activity for glycerol HDO at 400°C and 270 psig H2 with the NiMoSx catalyst showing higher C-C cleavage activity. Without a sulfur co-feed, both the NiMoSx and NiMoOx catalysts lost >40% deoxygenation activity over 30 h time on stream. With a 2100 ppm H2S co-feed the NiMoSx catalyst showed a 12 times decrease in the deactivation rate for deoxygenation and 6 time decrease in the deactivation rate for hydrogenation. The main products at high conversion were propylene, propane, ethylene, methane, CO, methanol, ethanol, and 1-propanol. At low conversion the major products were unsaturated allyl alcohol, acrolein, hydroxyacetone, and acetaldehyde. With no H2S co-feed at short contact times, there was a significant amount of carbon loss possibly due to condensation reactions, while at 2100 ppm H2S in the feed, the carbon balance was 102.4%. Temperature programmed oxidation of the spent NiMoSx catalysts after 30 h of glycerol HDO without an H2S co-feed showed that one of the causes of deactivation was coking.en_US
dc.language.isoenen_US
dc.subjectChemical Engineeringen_US
dc.titleThe Hydrodeoxygenation of Glycerol over a NiMoSx Catalyst as a Model for the Hydropyrolysis of Lignocellulosic Biomassen_US
dc.typeThesisen_US


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