Most known catalytic dehydration of sugar alcohols such as D-sorbitol and D-mannitol can only produce di-dehydrated forms as major product,but mono-dehydrated products are also useful chemicals.Moreover,both di-and mono-dehydration demand a high temperature(150℃or higher),which deserves further attentions.To improve the mono-dehydration efficiency,a series of metal-containing hydrothermal carbonaceous materials(HTC)are prepared as catalyst in this work.Characteriza-tion reveals that the composition of preparative solution has a key influence on the morphology of HTC.In transformation of D-sorbitol,all HTC catalysts show low conversions in water regardless of temperature,but much better outputs are obtained in ethanol,especially at a higher temperature.When D-mannitol is selected as substrate,moderate to high conversions are obtained in both water and ethanol.On the other hand,high mono-dehydration selectivity is obtained for both sugar alcohols by using all catalysts.The origin of mono-dehydration selectivity and role of carbon component in catalysis are discussed in association with calculations.This study provides an efficient,mild,eco-friendly,and cost-effective system for mono-dehydration of sugar alcohols,which means a lot to development in new detergents or other fine chemicals.

Cheng PAN;Chao FAN;Wanqin WANG;Teng LONG;Benhua HUANG;Donghua ZHANG;Peigen SU;Aqun ZHENG;Yang SUN

Department of Applied Chemistry,School of Science,Xi'an Jiaotong University,Xi'an 710049,China;Department of Material Chemistry,School of Science,Xi'an Jiaotong University,Xi'an 710049,China;School of Material Science and Engineering,Xi'an University of Science and Technology,Xi'an 710600,China;School of Science,Xi'an Jiaotong University,Xi'an 710049,China;School of Materials&Chemical Engineering,Xi'an Technological University,Xi'an 710021,China

能源前沿

[1]Cheng PAN;Chao FAN;Wanqin WANG;Teng LONG;Benhua HUANG;Donghua ZHANG;Peigen SU;Aqun ZHENG;Yang SUN-.Micro-sized hydrothermal carbon supporting metal oxide nanoparticles as efficient catalyst for mono-dehydration of sugar alcohol)[J].能源前沿,2022(05):822-839

Characteriza

Micro,sized,hydrothermal,supporting,metal,oxide,nanoparticles,efficient,mono,dehydration,sugar,Most,known,catalytic,alcohols,such,sorbitol,mannitol,can,only,produce,dehydrated,forms,major,but,products,also,useful,chemicals,Moreover,both,demand,temperature,higher,which,deserves,further,attentions,To,improve,efficiency,series,containing,carbonaceous,materials,HTC,prepared,this,work,reveals,that,composition,preparative,solution,has,key,influence,morphology,In,transformation,catalysts,show,low,conversions,water,regardless,much,better,outputs,obtained,ethanol,especially,When,selected,substrate,moderate,On,hand,selectivity,by,using,origin,role,component,catalysis,discussed,association,calculations,This,study,provides,mild,eco,friendly,cost,effective,system,means,lot,development,new,detergents,fine

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