Recent advances in Zeolite-Based catalysts for volatile organic compounds decontamination by thermal catalytic oxidation

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

“…More than 260 kinds of topologies for zeolites have been reported, but only about 25 kinds of zeolites have been successfully utilized in industrial processes. 19 Particularly, less than 10 kinds of topologies for zeolites (FAU, MFI, *BEA, MOR, MEL, LTL, CHA, FER, and MWW) have been investigated as catalysts in the oxidation of VOCs in published papers rather than commercialized applications, 6,16 where most investigations have been focused on FAU (mainly Y zeolite), MFI (ZSM-5 or silicalite-1 zeolite) and *BEA (beta zeolite), while other structures are rarely mentioned. 16 Such phenomena could be attributed to the following reasons: (1) relatively high conversion.…”

“…19 Particularly, less than 10 kinds of topologies for zeolites (FAU, MFI, *BEA, MOR, MEL, LTL, CHA, FER, and MWW) have been investigated as catalysts in the oxidation of VOCs in published papers rather than commercialized applications, 6,16 where most investigations have been focused on FAU (mainly Y zeolite), MFI (ZSM-5 or silicalite-1 zeolite) and *BEA (beta zeolite), while other structures are rarely mentioned. 16 Such phenomena could be attributed to the following reasons: (1) relatively high conversion. FAU, MFI, and *BEA-type zeolites exhibited good catalytic performances for the oxidation of VOCs in most cases; (2) easy availability.…”

“…FAU, MFI, and *BEA-type zeolites have relatively low cost, 9 which offers a good opportunity for their potential application in the oxidation of VOCs. 16…”

“…γ-Al 2 O 3 , TiO 2 ) due to the complicated process and involved expensive organic templates in the preparation of zeolites, which has been the main obstacle for zeolites with various topologies to be widely used as supports in the oxidation of VOCs. 6,16 Thus, simple and green routes for preparing low-cost zeolites are always desirable, some of which have been developed in recent years. 106 As a typical example, Beta (*BEA) zeolite has been successfully prepared in the absence of organic templates, which remarkably reduced the cost of Beta zeolite and opened a door for preparation of zeolites with various topologies at low cost.…”

“…12–14 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, 15–18 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.…”