PEG400 Modification of Keggin-Type H4PMo11VO40-Based Catalysts for the Selective Oxidation of Methacrolein to Methacrylic Acid

Li Yang; Heng Zhang; Rui Yi Yan; Xiang Ping Zhang; Guang Jin Zhang; Bao Zeng Ren

doi:10.4028/www.scientific.net/AMR.550-553.252

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 550-553PEG400 Modification of Keggin-Type...

PEG400 Modification of Keggin-Type H₄PMo₁₁VO₄₀-Based Catalysts for the Selective Oxidation of Methacrolein to Methacrylic Acid

Abstract:

Keggin-type 12-phosphomolybdic acid with molybdenum partially substituted by vanadium and protons partially substituted by alkali and transition metals was synthesized for the selective oxidation of methacrolein to methacrylic acid. The structures of the catalysts were studied by FT-IR, XRD, TG-DTA and BET. The effects of the additive amount of PEG400, calcination temperature and the content of Cs on the catalytic performance were investigated. Results show that specific surface areas of the catalysts increase with the increase of PEG400 amount; PEG400 is removed at 250 °C and the primary structure of the catalysts is not changed with the addition of PEG400. The conversion and selectivity increase with the Cs content, and then decrease. The catalyst with the ratio of Cs⁺: heteropoly anion=1:1 exhibits good catalytic performance for the selective oxidation of MAL. Under the optimum conditions, the conversion of MAL and selectivity of MAA are 76.4% and 83.6% respectively.

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Periodical:

Advanced Materials Research (Volumes 550-553)

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252-256

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.550-553.252

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Online since:

July 2012

Authors:

Li Yang, Heng Zhang, Rui Yi Yan, Xiang Ping Zhang, Guang Jin Zhang, Bao Zeng Ren

Keywords:

Catalysis, Heteropoly Acid, Methacrylic Acid, Selective Oxidation

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