Zeolite-Based Materials for the Catalytic Oxidation of VOCs: A Mini Review

Abstract

Catalysts for VOCs combustion have been widely studied and zeolite-based materials and have been structured to meet the need of particle use in this field. This review summarized several new trends in zeolite-based catalysts for VOCs catalytic oxidation. Intensive effort has been devoted to the optimization of composition and structure of catalysts, abatement of CVOCs, design of zeolite-based monolithic catalysts and adsorbent/catalyst bi-functional material. The suggestions for further work here presented are put forward based on the collation of recently published papers.

Total oxidation of benzene over cerium oxide-impregnated two-dimensional MWW zeolites obtained by environmental synthesis using Brazilian rice husk silica agro-industrial waste

“…According to the literature, zeolite-based materials with high specific surface and more open structure improves the dispersion of the active components and their access to the benzene molecules, and also reduces the sintering effects in VOC oxidation [10]. The same behavior occurred in our experiments, that is, the materials with higher specific surface area and more accessible pore structure (Ce 0.05 /R-HITQ-2 > Ce 0.…”

“…Zeolites with MFI, FAU and BEA codes-supported metal catalysts are one of the most promising materials to achieve oxidation of air pollutants [6][7][8][9]. These solids have well-established applications as supports and catalysts because of their beneficial properties including, a high specific surface that promotes the high dispersion of the active sites and well-defined pore structure with channels and cavities able to encapsulate nanoparticles (NPs) and reduce sintering effects, ion exchange ability, and thermal and hydrothermal stability [10]. Two-dimensional zeolites are a versatile class obtained through synthesis and post-synthesis modifications [11].…”

Enhanced Catalytic Oxidation of Toluene over Hierarchical Pt/Y Zeolite

“…Surface acidic sites are known to be strongly related to catalytic activity. The adsorption of toluene increases with the number of acidic sites, thereby increasing the surface coverage of toluene on the catalyst and facilitating the catalytic oxidation reaction [38]. The low temperature (100-250 • C) ammonia desorption peak in the NH 3 -TPD curve corresponds to the weak acid sites, the high temperature (400-600 • C) peak corresponds to the strong acid sites, and the intermediate temperature (250-400 • C) peak corresponds to the medium acid sites [39].…”

Challenges and opportunities for zeolite-based catalysts in catalytic oxidation of volatile organic compounds

“…[12][13][14] On the other hand, zeolite-supported noble metals or transition metal oxides have been reported as catalysts for catalytic oxidation of VOCs since the end of the last century and boosted in the past decade, 6,15 but the commercialized applications of zeolite-based catalysts in the oxidation of VOCs were seldom reported, suggesting the challenges for zeolite-based catalysts in these oxidation processes. Although review articles have summarized the development process of zeolite-based catalysts in the oxidation of VOCs as well as the relationship between the structure of zeolite and catalytic oxidation performances toward different types of target VOCs, [15][16][17][18] the challenges for the design and optimization of zeolites were rarely discussed. In this perspective, we aim to give a concise overview of the challenges as well as the corresponding opportunities for zeolite-based catalysts in the oxidation of VOCs, proposing strategies for preparation of highly efficient zeolite-based catalysts in the future.…”