Effect of physical and chemical modification on surface area of low-grade bauxite

2nd international Tropical Renewable Energy Conference 2017

Kusrini, E.^1 ; Rahman, A.^2 ; Bumi, Aji A.^1 ; Utami, C.S.^1 ; Prasetyanto, E.A.^3

Department of Chemical Engineering, Faculty of Engineering, Universitas Indonesia, Kampus Baru UI, Depok

16424, Indonesia^1

Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri, Jakarta, Indonesia^2

Faculty of Medicine, Atma Jaya Catholic University of Indonesia, Jl. Pluit Raya 2, Jakarta

14440, Indonesia^3

关键词: Acid activation;    BET surface area;    Low-grade bauxite;    Surface area;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/105/1/012006/pdf
DOI  :  10.1088/1755-1315/105/1/012006

来源: IOP

【 摘 要 】

In this research, the effect of physical and chemical modifications of low-grade bauxite (LB) with particle size of 200 mesh were studied. Here, we demonstrate chemically technique to synthesize low-grade bauxite/CeO2composites using Ce(NO3)3.6H2O with weight variations of 0.5, 1 and 2 g. The effect of Ce(NO3)3.6H2O concentrations on BET surface area of prepared low-grade bauxite/CeO2(05) (ALB0.5), low-grade bauxite/CeO2(1)(ALB1), and low-grade bauxite/CeO2(2)(ALB2) composites were observed. The results showed the BET surface area of LB is 59.85 m2/g. After acid activation with 1M HNO3, activated low-grade bauxite (ALB) has BET surface area of 101.6 m2/g. By chemically modification with Ce(NO3)3.6H2O in concentration ranging from 0.5; 1 and 2 g, the BET surface areas were reduced in the respectively order of 94.5, 87.9, and 85.5 m2/g for ALB0.5, ALB1, and ALB2. With the increase of the Ce(NO3)3.6H2O concentration, the BET surface area reduced compare to those found in the ALB. The acid activation treatment has significant effect compare to the chemical modification using Ce(NO3)3.6H2O.