Abstract
Wheat straw is a kind of rich agricultural waste. Resource utilization of wheat straw has received widespread attention. Herein, a novel approach of the rapid reduction of Ag2O into Ag by wheat straw with the production of organic acids under mild hydrothermal conditions is reported. After parameter optimization, almost all Ag2O is converted to Ag at a mild reaction temperature of 150 ℃ and a reaction time of 60 min in sodium hydroxide solution. Meanwhile, wheat straw was converted to organic acid such as formic acid, lactic acid, and acetic acid. This offers a cost-effective approach for Ag recovery and resource utilization of biomass.
Highlights
With the rapid growth of population and social development, a large amount of fossil fuel is consumed
Our previous researches have demonstrated that biomass feedstocks, such as glucose, fatty acid, cellulose can be converted into organic acids under hydrothermal conditions.[6,7,8]
In order to verify the feasibility of the reaction of wheat straw and Ag2O to produce Ag and organic acids, the reaction was carried out under the conditions of 0.72 g wheat straw, 0.46 g Ag2O, 0.75 mol/L NaOH, 135 °C of reaction temperature and 2 hours of reaction time
Summary
With the rapid growth of population and social development, a large amount of fossil fuel is consumed. This induces environmental pollution, energy crisis, greenhouse effect, etc., and poses a threat to human survival. The utilization of biomass resources is conducive to waste disposal, and to the production of high value-added chemicals and fuels. Hydrothermal reactions have demonstrated many advantages in resource utilization of biomass.[4,5] Our previous researches have demonstrated that biomass feedstocks, such as glucose, fatty acid, cellulose can be converted into organic acids under hydrothermal conditions.[6,7,8] only few studies used practical biomass. We propose a new method for reduction of Ag2O into Ag under mild hydrothermal conditions, as well as the formation of organic acids
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