Creation of Pd/Al2O3Catalyst by a Spray Process for Fixed Bed Reactors and Its Effective Removal of Aqueous Bromate.
Palladium nanoparticles were grown on sub-millimeter activated Al2O3particle support by spraying H2PdCl4solution evenly onto the support, followed with a thermal reduction under H2atmosphere. Compared with its counterpart created by the conventional impregnation method, the Pd/Al2O3catalyst created by the spray process could enrich the existence of active Pd nanoparticles on the surface of the catalyst support and increase their degree of dispersion, resulting in a much higher activity in the catalytic reduction of bromate in water. The effect of Al2O3support particle size on the bromate removal rate was also investigated, which demonstrated that smaller support particle size could have higher activity in the catalytic reduction of bromate in water because of its larger exposed surface. This Pd/Al2O3catalyst could be easily used in the fixed bed reactor due to its large support size and demonstrated excellent stability in the catalytic reduction of bromate in mineral water. This Pd/Al2O3catalyst also exhibited a good catalytic reduction performance on azo dyes as demonstrated by its effective catalytic hydrogenation of methyl orange. Thus, catalysts prepared by the spray method developed in this work could have the potential to be used in fixed bed reactors for various water treatment practices.
Environment Functional Materials Division, Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, P. R. China.|Institute of Materials, China Academy of Engineering Physics, Mianyang 621900, P. R. China.
Yu
Y
Gao
Environment Functional Materials Division, Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, P. R. China.|School of Materials Science and Engineering, Shandong University of Technology, Zibo 255000, P. R. China.
Wuzhu
W
Sun
Environment Functional Materials Division, Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, P. R. China.
Weiyi
W
Yang
Environment Functional Materials Division, Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, P. R. China.
Qi
Q
Li