MnOx catalysts supported on SBA-15 and MCM-41 silicas for a competitive VOCs mixture oxidation: In-situ DRIFTS investigations

IF 20.2 1区化学 Q1 CHEMISTRY, PHYSICAL

Applied Catalysis B: Environmental Pub Date : 2023-12-22 DOI:10.1016/j.apcatb.2023.123613

E.J. Moreno-Román , F. Can , V. Meille , N. Guilhaume , J. González-Cobos , S. Gil

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Abstract

The catalytic oxidation of different volatile organic compounds (VOCs) has been widely studied for several decades within the field of air depollution. However, there is still much to understand regarding the effects that these VOCs have on each other when they are blended together in the reaction mixture, as would be expected in many emissions. Herein, the catalytic oxidation of toluene and 2-propanol on supported manganese oxides under both single and binary VOCs oxidation conditions has been studied. We have found the catalyst activity for VOCs mineralization and its selectivity towards other by-products (i.e., acetone or propylene from 2-propanol) to be strongly dependent on the reaction conditions, the catalyst redox properties and support acidity. We have also assessed the promotion/inhibition effects derived from the VOCs mixture and proposed the reaction mechanism in each case by means of in-situ DRIFTS measurements.

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以 SBA-15 和 MCM-41 硅为支撑的氧化锰催化剂用于竞争性 VOC 混合氧化：原位 DRIFTS 研究

几十年来，空气污染领域一直在广泛研究不同挥发性有机化合物（VOC）的催化氧化。然而，当这些挥发性有机化合物在反应混合物中混合在一起时，它们之间会产生什么影响，还有很多问题需要了解。在此，我们研究了在单一和二元 VOC 氧化条件下，支撑锰氧化物对甲苯和 2-丙醇的催化氧化作用。我们发现，催化剂的 VOCs 矿化活性及其对其他副产品（即丙酮或 2-丙醇中的丙烯）的选择性与反应条件、催化剂的氧化还原特性和载体酸度密切相关。我们还评估了 VOCs 混合物的促进/抑制作用，并通过原位 DRIFTS 测量提出了每种情况下的反应机理。

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来源期刊

Applied Catalysis B: Environmental 环境科学-工程：化工

CiteScore

38.60

自引率

6.30%

发文量

1117

审稿时长

24 days

期刊介绍： Applied Catalysis B: Environment and Energy (formerly Applied Catalysis B: Environmental) is a journal that focuses on the transition towards cleaner and more sustainable energy sources. The journal's publications cover a wide range of topics, including: 1.Catalytic elimination of environmental pollutants such as nitrogen oxides, carbon monoxide, sulfur compounds, chlorinated and other organic compounds, and soot emitted from stationary or mobile sources. 2.Basic understanding of catalysts used in environmental pollution abatement, particularly in industrial processes. 3.All aspects of preparation, characterization, activation, deactivation, and regeneration of novel and commercially applicable environmental catalysts. 4.New catalytic routes and processes for the production of clean energy, such as hydrogen generation via catalytic fuel processing, and new catalysts and electrocatalysts for fuel cells. 5.Catalytic reactions that convert wastes into useful products. 6.Clean manufacturing techniques that replace toxic chemicals with environmentally friendly catalysts. 7.Scientific aspects of photocatalytic processes and a basic understanding of photocatalysts as applied to environmental problems. 8.New catalytic combustion technologies and catalysts. 9.New catalytic non-enzymatic transformations of biomass components. The journal is abstracted and indexed in API Abstracts, Research Alert, Chemical Abstracts, Web of Science, Theoretical Chemical Engineering Abstracts, Engineering, Technology & Applied Sciences, and others.