Published February 2021 | Version v1
Journal article Metadata-only

Effect of zeolite acidity and structure on ozone oxidation of toluene using Ru-Mn loaded zeolites at ambient temperature

Creators

  • 1. School of Environmental Engineering, University of Seoul, Seoul 02504, South (Korea, Republic of)
  • 2. Department of Environment and Energy, Sejong University, Seoul 05006, South (Korea, Republic of)
  • 3. Department of BioEnvironmental Energy, Pusan Nat. University, Miryang 50463, South (Korea, Republic of)
  • 4. Department of Chemical Engineering, Kongju Nat. University, Cheonan 31080, South (Korea, Republic of)
  • 5. Department of Civil and Environmental Engineering, Sejong University, Seoul 05006, South (Korea, Republic of)

Description

Highlights: • Catalytic ozone oxidation was applied to remove toluene. • Ru-Mn was loaded on different acidic zeolites. • Medium acidity showed higher catalytic removal activity of methyl benzene. • HZSM-5 structure produced higher CO2 amount compared to HY structure. • Mn3+/Mn4+ and oxygen vacancy/oxygen lattice also affected catalytic VOC removal. Five different Ru-Mn/zeolites were used to investigate their catalytic efficiencies for removing toluene (100 ppm) with ozone (1000 ppm) at room temperature. In general, most of metal oxide catalysts for removal of organic compounds need higher temperature than the ambient temperature, but Mn-based catalysts shows activity for prevalent organic pollutants even at room temperature with ozone. For the removal of toluene at room temperature without further heating, bimetallic Ru added Mn catalysts were applied in combination with different zeolite supports. The catalytic activity of the Ru-Mn catalysts strongly depended on the zeolite, of which the characteristics such as acidity and adsorption degree of toluene are dependent on the ratio of SiO2/Al2O3. Among the five Ru-Mn catalysts used, Ru-Mn/HY (SiO2/Al2O3 ratio: 80) and Ru-Mn/ZSM-5 (SiO2/Al2O3 ratio: 80) had higher toluene and ozone removal efficiencies. The toluene removal efficiency of Ru-Mn/zeolites was proportional to the pore volume and surface area. In terms of ozone degradation, Ru-Mn/HY(80) and Ru-Mn/HZSM-5(80) had the highest removal efficiencies. Overall, the catalytic ozone oxidation of toluene using Ru-Mn/zeolites seemed to be affected by a combination of the acidic properties of zeolites, Mn3+/Mn4+ ratio, and concentration ratio of oxygen vacancies to oxygen lattices on the catalyst surface.

Availability note (English)

Available from http://dx.doi.org/10.1016/j.jhazmat.2020.123934

Additional details

Identifiers

DOI
10.1016/j.jhazmat.2020.123934;
PII
S0304389420319245;

Publishing Information

Journal Title
Journal of Hazardous Materials
Journal Volume
403
Journal Page Range
vp.
ISSN
0304-3894
CODEN
JHMAD9

INIS

Country of Publication
Netherlands
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
54024822
Subject category
S36: MATERIALS SCIENCE; S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
ADSORPTION; AMBIENT TEMPERATURE; BENZENE; CARBON DIOXIDE; CATALYSTS; METALS; OXIDATION; PH VALUE; POLLUTANTS; SILICA; SILICON OXIDES; SURFACE AREA; SURFACES; TOLUENE; VACANCIES; VOLATILE MATTER; ZEOLITES
Descriptors DEC
ALKYLATED AROMATICS; AROMATICS; CARBON COMPOUNDS; CARBON OXIDES; CHALCOGENIDES; CHEMICAL REACTIONS; CRYSTAL DEFECTS; CRYSTAL STRUCTURE; ELEMENTS; HYDROCARBONS; INORGANIC ION EXCHANGERS; ION EXCHANGE MATERIALS; MATERIALS; MATTER; MINERALS; ORGANIC COMPOUNDS; OXIDE MINERALS; OXIDES; OXYGEN COMPOUNDS; POINT DEFECTS; SILICATE MINERALS; SILICON COMPOUNDS; SORPTION; SURFACE PROPERTIES

Optional Information

Copyright
Copyright (c) 2020 Elsevier B.V. All rights reserved.