(90c) Denitrogenation of Pyridine with Acetic Acid As Hydrogen Source Under Catalytic Hydrothermal Gasification Environment
The first step of hydrodenitrogenation of pyridine is hydrogenation of pyridines to its piperidine form, followed by ring-opening and then C-C bond cleavage for ammonia/amine and small hydrocarbon production. Conventional hydrodenitrogenation requires hydrogen gas at high pressure to realize this series of conversions. Due to the large quantity of VFAs in the PHWW, and that VFAs have been extensively studied as model compounds for high hydrogen production in catalytic gasification conditions, it is possible to use VFAs as hydrogen precursor in the hydrodenitrogenation process without apply hydrogen gas.
In this study, acetic acid and pyridine are chosen as model compounds to evaluate the feasibility of using VFA as hydrogen source for hydrodenitrogenation of pyridine. Denitrogenation/gasification will be carried out under 500C reaction temperature, 60 min reaction time, which is previously discovered optimal operation condition for PHWW gasification. Denitrogenation efficiency and gasification yield under different pyridine to acetic acid ratio will be evaluated. Possible reaction pathway, and reaction kinetics will be discussed.