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Pd-based egg-shell nano-catalysts were prepared using porous hollow silica nanoparticles (PHSNs) as support, and the as-prepared catalysts were modified with TiO 2 to promote their selectivity for hydro-genation of acetylene. Pd nanoparticles were loaded evenly on PHSNs and TiO 2 was loaded on the active Pd particles. The effects of reduction time and temperature and the amount of TiO 2 added on catalytic performances were investigated by using a fixed-bed micro-reactor. It was found that the catalysts showed better performance when reduced at 300°C than at 500 °C, and if reduced for 1 h than 3 h. When the amount of Ti added was 6 times that of Pd, the catalyst showed the highest ethylene selectivity.
Pd-based egg-shell nano-catalysts were prepared using porous hollow silica nanoparticles (PHSNs) as support, and the as-prepared catalysts were modified with TiO 2 to promote their selectivity for hydro-genation of acetylene. Pd nanoparticles were loaded evenly on The effects of reduction time and temperature and the amount of TiO 2 added on catalytic plays were investigated by using a fixed-bed micro-reactor. It was found that the catalysts showed better performance when reduced at 300 ° C than at 500 ° C, and reduced to 1 h than 3 h. When the amount of Ti added was 6 times that of Pd, the catalyst showed the highest ethylene selectivity.