Effect of surface treatment technique on properties and performance of Na2WO4‐TiO2‐MnOx/SiO2 for oxidative coupling of methane. Issue 11 (10th August 2021)

• Record Type: Journal Article
• Authors: Chuntalap, Yuttana; Panchan, Noppadol; Junsomboon, Jaroon; Srisonphan, Siwapon; Witoon, Thongthai; Seubsai, Anusorn; Chareonpanich, Metta; Niamnuy, Chalida
• Is Part Of: Journal of chemical technology & biotechnology. Volume 96:Issue 11(2021)
• Page Start: 3101
• Page End: 3113
• Publication Date: 2021-08-10
• Subjects: cold plasma -- electron beam -- microwave -- oxidation coupling of methane; Biotechnology -- Periodicals; Chemistry, Technical -- Periodicals; Chemical engineering -- Periodicals; Industries -- Environmental aspects -- Periodicals; 660
• DOI: 10.1002/jctb.6862
• Languages: English
• ISSNs: 0268-2575

Abstract

Abstract: BACKGROUND: Oxidative coupling of methane (OCM) is a promising catalytic process for the conversion of methane to higher‐valued hydrocarbons (C2+ ). In this study, Na2 WO4 ‐TiO2 ‐MnOx /SiO2 (NWTM) catalysts were obtained by various treatment techniques, including conventional calcine (CC, 800 °C), cold plasma (CP, 7 kV, 1 Hz), microwave radiation (MW, 800 °C), and electron beam radiation (EB, 4000 kGy), with no surface treatment (WT) as a benchmark method. RESULTS: The results showed substantial differences in catalytic performance. The catalyst prepared by the cold plasma method provided the highest performance in the activity (20.91% C2+ yield with 48.04% C2+ selectivity and 43.52% CH4 conversion) at the early stage of testing (1–4 h). CONCLUSION: However, the catalyst prepared by microwave radiation achieved the most stable active phases for the 24‐h testing period and yielded the highest C2+ for a five‐cycle reusability test. The catalyst prepared by electron beam radiation was found to have the lowest C2+ activity due to the poor distribution of the active elements. © 2021 Society of Chemical Industry (SCI).