Table of Contents
Journal of Catalysts
Volume 2014, Article ID 869472, 8 pages
http://dx.doi.org/10.1155/2014/869472
Research Article

Preparation of Mesoporous SiO2-Pillared Lamellar Titanoniobate Catalysts for Bioethanol Dehydration

1Laboratório de Catálise e Materiais, Departamento de Química Geral e Inorgânica, Instituto de Química, Universidade Federal da Bahia(UFBA), Rua Barão de Jeremoabo 147, Campus Universitário da Federação, 40170-280 Salvador, BA, Brazil
2Instituto Nacional de Ciência e Tecnologia em Energia e Ambiente(INCT-E&A), Universidade Federal da Bahia, 40170-115 Salvador, BA, Brazil

Received 24 October 2013; Revised 11 December 2013; Accepted 12 December 2013; Published 9 January 2014

Academic Editor: Raghunath V. Chaudhari

Copyright © 2014 Olivalter Pergentino et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The lamellar perovskite K0,8Ti0,8Nb1,2O5 was prepared by solid state reaction, and its protonic form was used in a sequence of intercalation steps with n-butylamine, cetyltrimethylammonium bromide (CTABr), and tetraethyl orthosilicate (TEOS). After calcination, a high surface area, mesoporous SiO2-pillared titanoniobate, was obtained. The samples were characterized by XRD, EDX, TG-DTG, N2 adsorption isotherms, and NH3-TPD. The pillarization procedure affected the textural properties, the amount, and strength distribution of acid sites. The influence of the pillarization procedure on the catalytic properties of the lamellar titanoniobates was investigated on ethanol dehydration. High ethanol conversions and ethylene yields (>90%) were obtained in the presence of the SiO2-pillared titanoniobate catalyst, at 350–450°C.