Thermal Cracking of Sugars for the Production of Glycolaldehyde and Other Small Oxygenates.,ChemSusChem

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Thermal Cracking of Sugars for the Production of Glycolaldehyde and Other Small Oxygenates.
ChemSusChem ( IF 7.5 ) Pub Date : 2019-12-17 , DOI: 10.1002/cssc.201902887
Christian B Schandel ₁ , Martin Høj ₁ , Christian M Osmundsen ₂ , Anker D Jensen ₁ , Esben Taarning ₂

Affiliation

Thermal cracking of sugars for production of glycolaldehyde, a potential renewable platform molecule, in yields up to 74 % with up to 95 % carbon recovered in the condensed product is demonstrated using glucose as the feed. The process involves spraying an aqueous sugar solution into a fluidized bed of glass beads. Continuous operation is carried out for more than 90 h with complete conversion and stable product selectivity. Besides glycolaldehyde, the other identified condensed products are pyruvaldehyde (9 %), formaldehyde (7 %), glyoxal (2 %), acetol (2 %), and acetic acid (1 %). The effects of temperature, glucose feed concentration, and type of sugar feedstock are investigated. Cracking the monosaccharides fructose and xylose leads to very different product distributions from glucose, but similar carbon recovery. A reaction network in agreement with the main observed products from cracking of monosaccharide sugars is proposed.

中文翻译：

糖的热裂解，用于生产乙醇醛和其他小含氧化合物。

使用葡萄糖作为进料，证明了热裂化糖以生产乙醇醛（一种潜在的可再生平台分子）的产率高达74％，在冷凝产物中回收的碳高达95％。该方法涉及将糖水溶液喷雾到玻璃珠的流化床中。连续运行90个小时以上，可实现完全转化和稳定的产品选择性。除乙醇醛外，其他鉴定出的缩合产物为丙酮醛（9％），甲醛（7％），乙二醛（2％），丙酮醇（2％）和乙酸（1％）。研究了温度，葡萄糖进料浓度和糖原料类型的影响。将单糖果糖和木糖裂解会导致产物分布与葡萄糖截然不同，但碳回收率相似。

更新日期：2020-01-21

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