A modified heteropoly acid catalyst with cetyltrimethylammonium bromide for methacrolein to methacrylic acid

[Display omitted] •The CTA-CsPAV catalyst for oxidation of methacrolein to methacrylic acid was prepared by the emulsion method.•The effects of CTAB on CTA-CsPAV catalyst were studied.•The selectivity to MAA over CTA-CsPAV (95%) was higher than that of CsPAV (69%) at the same MAL conversion level (6...

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Published inJournal of industrial and engineering chemistry (Seoul, Korea) Vol. 65; pp. 254 - 263
Main Authors Cao, Yun-Li, Wang, Lei, Zhou, Li-Long, Xu, Bao-Hua, Diao, Yan-Yan, Zhang, Suo-Jiang
Format Journal Article
LanguageEnglish
Published Elsevier B.V 25.09.2018
한국공업화학회
Subjects
Cetyltrimethyl ammonium bromide
Heteropolyacids
Methacrolein
Methacrylic acid
화학공학
Heteropolyacids
Methacrylic acid
Cetyltrimethyl ammonium bromide
Methacrolein
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Summary:[Display omitted] •The CTA-CsPAV catalyst for oxidation of methacrolein to methacrylic acid was prepared by the emulsion method.•The effects of CTAB on CTA-CsPAV catalyst were studied.•The selectivity to MAA over CTA-CsPAV (95%) was higher than that of CsPAV (69%) at the same MAL conversion level (65%). A novel type of heteropolyacids, CTAB-CsH3PMo11VO40 (CTA-CsPAV), was developed by a method of emulsion synthesis using cetyltrimethyl ammonium bromide (CTAB) as the structure promoter, which was applied as a catalyst in the oxidation of methacrolein (MAL) to methacrylic acid (MAA) with fixed-bed reactor. The structure and property of CTA-CsPAV were characterized by FT-IR, XRD, nitrogen adsorption-desorption, NH3-TPD, SEM, XPS, and so on. The structure-performance relationship of CTA-CsPAV was systematically studied, wherein the influence of surface area, acidity, redox property of CTA-CsPAV were focused and discussed. Importantly, the long-term performance of CTA-CsPAV was also investigated.
ISSN:1226-086X
1876-794X
DOI:10.1016/j.jiec.2018.04.036