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Conversion Of Biomass Derived Tar In A Catalytic Post-Gasification Process, Floria Rojas Chaves
Conversion Of Biomass Derived Tar In A Catalytic Post-Gasification Process, Floria Rojas Chaves
Electronic Thesis and Dissertation Repository
The present MESc thesis reports the performance of a fluidizable CeO2 promoted Ni/γ-Al2O3 catalyst to be used in a post-gasification process for tar removal. The catalysts developed were prepared using the incipient wetness technique and characterized chemically and physically, using the following techniques: N2 Adsorption-Desorption, XRD, NH3 and CO2 TPD, Pyridine-FTIR, H2-TPR, and H2-Pulse Chemisorption. The catalysts were tested in a fluidized CREC Riser Simulator, in the 500°C-550°C temperature range, within 5 s-10 s reaction times, using both steam and steam-H2/CO2 atmospheres.A 2-methoxy-4-methlyphenol (2M4MP) compound was …
Catalytic Consequences Of Catalyst Pellet Architecture On The Methanol To Oxymethylene Process, Sebastian M K Cook
Catalytic Consequences Of Catalyst Pellet Architecture On The Methanol To Oxymethylene Process, Sebastian M K Cook
Electronic Thesis and Dissertation Repository
A critical step for the synthesis of renewable oxy methyl ethers (OME) targeted towards diesel substitution, is the catalytic production of a dimethoxymethane/formaldehyde mixture from methanol and air. The bifunctional catalyst requirements needed for methanol to undergo both the acidic and oxidative steps required for dimethoxymethane formation have been recently established for TiO2-supported vanadia catalysts. However, translating these requirements to a catalyst capable of industrial operation remains a challenge. This thesis examines the considerations and adjustments needed to translate the molecular active phase to a large-scale catalytic pellet, including active phase distribution and possibility of hot-spot creation during …