کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
39014 45801 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mo2C catalyzed vapor phase hydrodeoxygenation of lignin-derived phenolic compound mixtures to aromatics under ambient pressure
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Mo2C catalyzed vapor phase hydrodeoxygenation of lignin-derived phenolic compound mixtures to aromatics under ambient pressure
چکیده انگلیسی


• Molybdenum carbide (Mo2C), a non-precious metal catalyst, used for vapor phase hydrodeoxygenation of phenolic compound mixtures at ambient pressure.
• High aromatics yield (>90%) for mixtures containing m-cresol, anisole, 1,2-dimethoxybenzene, and guaiacol can be achieved with high hydrogen efficiency.
• Undesired successive hydrogenation reactions of aromatics over Mo2C were inhibited due to in situ oxygen modification of the catalyst.

High aromatics yield (>90%, benzene and toluene) was obtained from vapor phase hydrodeoxygenation (HDO) of phenolic compound mixtures containing m-cresol, anisole, 1,2-dimethoxybenzene, and guaiacol over molybdenum carbide catalysts (Mo2C) under atmospheric pressure at 533–553 K, even with H2 to phenolic compound molar ratios of ∼3,300. Toluene selectivity increased proportionately (4%–66%) to m-cresol content in HDO of phenolic compound mixtures (molar composition: 0%–70%) at quantitative conversion. Phenol selectivity increased with decreasing conversion, implying that the aryl-methoxyl bond in guaiacol is cleaved first, before the aryl-hydroxyl bond. Low selectivity to cyclohexane and methylcyclohexane (<10%) across the conversions investigated (18–94%) demonstrates that undesired successive hydrogenation reactions of aromatics over Mo2C were inhibited, presumably due to in situ oxygen modification, as inferred from titration studies of aromatic hydrogenation reactions using methanol and water as titrants.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Catalysis A: General - Volume 510, 25 January 2016, Pages 42–48
نویسندگان
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