Hydrogenation of Liquid Styrene by Alumina Supported Nickel Catalysts: Comparison between Classical and Non-Classical Methods

International Conference on Innovative Research - ICIR Euroinvent 2016

Tan, Y.C.^1 ; Abu Bakar, N.H.H.^1 ; Tan, W.L.^1 ; Abu Bakar, M.^1

School of Chemical Sciences, Universiti Sains Malaysia, USM, Penang

11800, Malaysia^1

关键词: Activation conditions;    Alumina supported nickel;    Catalytic reactivity;    Classical methods;    H2 chemisorption;    H2 temperature-programmed reduction;    Hydrogenation reactions;    Weight percentages;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/133/1/012017/pdf
DOI  :  10.1088/1757-899X/133/1/012017

来源: IOP

【 摘 要 】

Almina supported Ni catalysts (Ni/Al2O3) with different Ni weight percentages (wt%) were prepared via classical and non-classical methods. All samples were prepared via impregnation technique. The samples prepared via non-classical methods were reduced using KBH4as the reducing agent. The catalysts were tested for the hydrogenation of styrene in liquid phase. Optimum activation conditions for the hydrogenation reaction were found to be 633 K for 2 hours. Comparison of the catalytic reactivity for all catalysts at these activation conditions showed that catalysts prepared via classical methods exhibited better activity. Furthermore the 7.6wt% Ni-Al2O3/C showed enhanced activity when compared to the 5.9wt% and 13.8wt% Ni-Al2O3/C catalyst. This phenomenon is mainly attributed to the type of Ni active sites available on the catalyst. The surface properties of the catalysts investigated via H2- temperature programmed reduction (H2-TPR), H2-chemisorption and H2-temperature programmed desorption (H2-TPD) confirm this.