Highly Effective La Modified Ni Catalysts Derived from NiAl-LDHs for Anthraquinone Hydrogenation

GUAN Chaoyang; HONG Runrun; ZHANG Na; FENG Junting; YIN Min; LI Dianqing

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Highly Effective La Modified Ni Catalysts Derived from NiAl-LDHs for Anthraquinone Hydrogenation

GUAN Chaoyang,HONG Runrun,ZHANG Na,FENG Junting *,YIN Min,LI Dianqing

State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029

*Correspondence author

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Funding: Specialized Research Fund for the Doctoral Program of High Education（No.20110010120012）

Opened online: 4 May 2016

Accepted by: none

Citation: GUAN Chaoyang,HONG Runrun,ZHANG Na.Highly Effective La Modified Ni Catalysts Derived from NiAl-LDHs for Anthraquinone Hydrogenation[OL]. [ 4 May 2016] http://en.paper.edu.cn/en_releasepaper/content/4685749

A series of Ni/Al2O3 catalysts were prepared using NiAl-CO3-layered double hydroxides (NiAl-LDHs) with different Ni/Al molar ratio (2:1~4:1) as precursors and studied in the hydrogenation of anthraquinone. The catalytic results show that Ni/Al2O3-2:1 catalyst exhibits highest hydrogenation activity due to the highest surface area. Moreover, different amount of lanthanum modified Ni/Al2O3-2:1 catalysts show higher hydrogenation activity. When the La loading reaches 2 %, the hydrogenation activity increases by 20.7 % and shows preferable selectivity compared with Ni/Al2O3-2:1 catalyst. Superior hydrogenation activity can be ascribed to the smaller Ni particle size and higher Ni dispersion. Preferable selectivity can be ascribed to the electronic effect of lanthanum, resulting in electron-rich Ni and weakening the adsorption of anthraquinone hydrogenation products. In addition, a new type of pores is generated during the calcination process, which is advantageous for the generated anthraquinone molecules to spread out to prevent overhydrogenation.

Keywords:anthraquione hydrogenation;LDHs; Ni/Al2O3 catalyst; lanthanum

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