Green Energy Source H_2 Production from NaBH_4 Hydrolysis Using p(Oxalic Acid) Based Non-metallic Catalyst

摘要

In this study, for the first time, metal-free polymeric catalysts for H_2 production from NaBH_4 hydrolysis were synthesized from Oxalic acid (OxA) by redox polymerization technique in a surfactant-free emulsion medium. The structural and phys-icochemical properties of these polymeric catalysts p(OxA) were investigated by Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM) analyses. In addition, the effects of parameters such as reaction temperature, amount of polymeric particle, and NaBH_4 concentration on H_2 gas production were investigated. It was found that the NaBH_4 hydrolysis reaction by oxalic acid-based catalysts follows first-order kinetics. At the same, the maximum hydrogen production rate was reached at 50 ℃ in hydrolysis reactions performed at different temperatures in the presence of different amounts of p(OxA) particles. These values for 0.1 g, 0.3 g, and 0.5 g p(OxA) were calculated as 29.41 mL H_2 g_(catalys)~(-1) dak~(-1), 27.78 mL H_2 g_(catalys)~(-1) dak~(-1), 21.74 mL H_2 g_(catalys)~(-1) dak~(-1), respectively. The results obtained suggest that metal-free oxalic-based polymeric particles are promising catalyst systems in the production of H_2 gas.