TiO2-modified nano-egg-shell Pd catalyst for selective hydrogenation of acetylene

• Published in: Particuology Vol. 8; no. 3; pp. 251 - 256
• Main Authors: Gao, Jin, Zhu, Qiufeng, Wen, Lixiong, Chen, Jianfeng
• Format: Journal Article
• Language: English
• Published: Key Lab for Nanomaterials,Ministry of Education,Beijing University of Chemical Technology,Beijing 100029,China%Key Lab for Nanomaterials,Ministry of Education,Beijing University of Chemical Technology,Beijing 100029,China 01.06.2010; Research Center of the Ministry of Education for High Gravity Engineering and Technology,Beijing University of Chemical Technology,Beijing 10002
• Subjects: 二氧化钛催化剂; 多孔二氧化硅; 氧化钛修饰; 选择性加氢; 钯催化剂; 钯纳米粒子; 鸡蛋壳; Modification; Selective hydrogenation; Porous hollow silica nanoparticles; Egg-shell nano-catalyst; Acetylene
• ISSN: 1674-2001; 1672-2515; 2210-4291
• DOI: 10.1016/j.partic.2010.01.004

Pd-based egg-shell nano-catalysts were prepared using porous hollow silica nanoparticles （PHSNs） as support, and the as-prepared catalysts were modified with TiO2 to promote their selectivity for hydro-genation of acetylene. Pd nanoparticles were loaded evenly on PHSNs and TiO2 was loaded on the active Pd particles. The effects of reduction time and temperature and the amount of TiO2 added on catalytic per-formances were investigated by using a fixed-bed micro-reactor. It was found that the catalysts showed better performance when reduced at 300 ℃ than at 500℃, 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.