RT journal article
T1 Catalytic Oxidation of Acetone over MnOx-SiO2 Catalysts: An Effective Approach to Valorize Rice Husk Waste
A1 Cardoso, Mauricio
A1 Portugau, Patrice
A1 De Los Santos, Carolina
A1 Faccio, Ricardo
A1 Vidal Muñoz, Hilario
A1 Gatica Casas, José Manuel
A1 Yeste Siguenza, María del Pilar
A1 Castiglioni, Jorge
A1 Torres, Martín
A2 Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica
K1 rice husk silica
K1 biomass waste
K1 VOC
K1 manganese oxides
K1 catalyst
K1 air pollution
AB Rice husk, a byproduct of rice production, poses significant environmental challengesdue to disposal issues, while the emission of volatile organic compounds into the atmospherefurther exacerbates these concerns. This study addresses both problems by exploring the potential oftexturally enhanced SiO2, derived from Uruguayan rice husk, as a catalytic support for manganeseoxides in the combustion of volatile organic compounds. SiO2 was synthesized from rice huskash using a sustainable, acid-free pretreatment method, yielding a notably high silica purity of96.5%—a level comparable to or exceeding previously reported values, highlighting the high silicaquality inherent in Uruguayan rice husk. The catalytic activity was evaluated using acetone as amodel volatile organic compound, achieving up to 90% conversion with 30 wt.% manganese oxide at300 ◦C, with CO2 as the primary product. Furthermore, a 24 h stability test demonstrated consistentperformance, maintaining a conversion rate of around 95.6 ± 2.5%. These findings suggest thathigh-purity SiO2 derived from Uruguayan rice husk, with its sustainability benefits, offers an effectivesolution for acetone removal when supporting an active phase such as manganese oxides, addressingboth rice husk disposal and volatile organic compound emissions.
PB MDPI
SN 1996-1944
YR 2024
FD 2024
LK http://hdl.handle.net/10498/36373
UL http://hdl.handle.net/10498/36373
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 21-sep-2026