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Catalyst Evolution Enhances Production of Xylitol from Acetal-Stabilized Xylose
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-01-21 , DOI: 10.1021/acssuschemeng.9b06456 Ydna M. Questell-Santiago 1 , Jher Hau Yeap 1 , Masoud Talebi Amiri 1 , Benjamin P. Le Monnier 1 , Jeremy S. Luterbacher 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-01-21 , DOI: 10.1021/acssuschemeng.9b06456 Ydna M. Questell-Santiago 1 , Jher Hau Yeap 1 , Masoud Talebi Amiri 1 , Benjamin P. Le Monnier 1 , Jeremy S. Luterbacher 1
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We demonstrate a catalytic process for xylitol production based on the volatility and unique reactivity of diformylxylose (DFX), which can be produced at near theoretical yield from biomass and, contrary to xylose, can be easily purified by distillation. The apparent rate-limiting step was independent of hydrogen pressure, and catalytic studies showed a slow evolution of the Pt/C catalyst that led to tripling of the xylitol yield. In-depth catalyst characterization attributed this activity increase to the formation of acidic carbon deposits, which created acid sites in close proximity to Pt. These proximal sites accelerated DFX hydrolysis while avoiding unfavorable isomerization reactions.
中文翻译：
催化剂的发展增强了从乙缩醛稳定的木糖中生产木糖醇的能力
我们展示了基于二甲酰基木糖（DFX）的挥发性和独特反应性生产木糖醇的催化过程，该二甲酰木糖可以从生物质以接近理论收率的价格生产，并且与木糖相反，可以通过蒸馏轻松纯化。表观限速步骤与氢气压力无关，催化研究表明Pt / C催化剂的缓慢释放导致木糖醇收率提高了三倍。深入的催化剂表征将这种活性提高归因于酸性碳沉积物的形成，该沉积物在Pt附近形成了酸性位点。这些近端位点加速了DFX水解，同时避免了不利的异构化反应。
更新日期：2020-01-22
中文翻译：
催化剂的发展增强了从乙缩醛稳定的木糖中生产木糖醇的能力
我们展示了基于二甲酰基木糖（DFX）的挥发性和独特反应性生产木糖醇的催化过程，该二甲酰木糖可以从生物质以接近理论收率的价格生产，并且与木糖相反，可以通过蒸馏轻松纯化。表观限速步骤与氢气压力无关，催化研究表明Pt / C催化剂的缓慢释放导致木糖醇收率提高了三倍。深入的催化剂表征将这种活性提高归因于酸性碳沉积物的形成，该沉积物在Pt附近形成了酸性位点。这些近端位点加速了DFX水解，同时避免了不利的异构化反应。
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