Abstract
This study evaluated two hydrolysis strategies that involve a two-step and a one-pot process for the hydrolysis of cellulose. The two-step process consisted of cellulose pretreatment with deep eutectic solvent, followed by hydrolysis promoted by the carbon-based solid acid catalyst. The obtained results showed that the xylose and glucose yields were 33.9% and 6.9%, respectively, from corn stover based on this two-step strategy with ChCl ·Formic acid used as the pretreatment solvent. For one-pot hydrolysis, side reactions occurred and less glucose accumulated in the reaction system. In this case, the maximum achieved glucose yield was 21.1% for the hydrolysis of microcrystalline cellulose.Graphic abstractThe corn stover was pretreated with DES and then hydrolysed by carbon-based solid acid catalyst. Approximately 33.9% of xylose and 6.9% of glucose was recovered from corn stover with ChCl·Formic acid as the pretreatment solvent.
Highlights
Meeting the continuously increasing demand for clean energy is the greatest current challenge in energy research [1]
The solid catalysts were separated from the reaction mixture by filtration
The size and morphology of the synthesized sucralosederived carbon based catalyst were characterized by scanning electron microscopy (SEM) analysis using a JSM-5600 LV microscope (ZEISS Merlin, Germany)
Summary
Meeting the continuously increasing demand for clean energy is the greatest current challenge in energy research [1]. Amongst the many renewable sources of energy, energy from the biomass is one of the most abundant sources due to the wide availability of raw materials. The use of lignocellulose may solve the crisis of food shortage caused by the use of a food crop as a resource for producing fuel and chemicals [2]. Lignocellulose is a promising alternative to food crops as a biomass source. Simple and efficient reduction of lignocellulose to sugars such as glucose and xylose by hydrolysis is the greatest challenge in the use of lignocellulose for energy production due to the recalcitrant nature of lignocellulose [3]. As pointed by Liu et al, the development of efficient, sustainable and economic methods for cellulose depolymerisation is a key advance for biorefining [4]
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