화학공학소재연구정보센터
Applied Catalysis A: General, Vol.469, 284-289, 2014
Synthesis, characterization and acid catalysis of solid acid from peanut shell
A strong Bronsted solid acid was synthesized by sulfonation of the partially carbonized agricultural biowaste peanut shell. The acidity of the Bronsted solid acid was characterized by X-ray diffraction (XRD), Fourier-transform infrared spectra (FT-IR) and solid-state nuclear magnetic resonance (NMR) spectroscopy. The characterization results show that sulfonation on the peanut shell carbon produces a carbon based solid acid containing three functional Bronsted acid sites: weak acidic OH groups, strong acidic -COOH and -SO3H groups. The acid strength of the solid acid is stronger than that of HZSM-5(Si/Al = 75), but still weaker than that of 100% H2SO4. The catalytic reaction tests indicate that this solid acid catalyst exhibits high activity and excellent recyclability for biodiesel production. (C) 2013 Elsevier B.V. All rights reserved.