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Exploring hemp seed hull biomass for an integrated C-5 biorefinery:Xylose and activated carbon

Journal of Bioresources and Bioproducts 2024年第3期9卷 310-321页

作者： Sreesha Malayil Luke Loughran frederik mendoza ulken Jagannadh Satyavolu Conn Center for Renewable Energy Research University of LouisvilleKentucky 40292United States Bioproducts LLC LouisvilleKentucky 40206United States RTI International Research Triangle ParkNC 27709United States

Large quantities of hemp hulls can be completely utilized for creation of value-added products (cost effective biofuels and biochemicals) through a biorefinery approach. A sustainable approach in making xylose, a low calorie sweetener and high surface area activated carbons (AC) for super capacitors, attracts interest. The AC when leveraged as a co-product from biorefinery process makes it more cost effective and, in this paper, we discuss the production of xylose and AC from hemp seed hull with methane sulphonic acid (MSA) hydrolysis. Xylose recovery with MSA hydrolysis was 25.15 g/L when compared to the traditional sulphuric acid (SA) hydrolysis of 19.96 g/L at the same acid loading of 1.8 %. The scanning electron microscope (SEM) images and Fourier transform infrared (FT-IR) spectra indicate partial delignification along with hemicellulose hydrolysis responsible for high xylose recovery. Post hydrolysis fibers were KOH activated and carbonized to make AC. The MSA hydrolyzed and KOH activated fiber produced pure, fluffier and finer particle AC with a drastic increase in surface area 1 452 m2/g when compared to SA hydrolyzed of 977 m2/g. These results indicate the potential of MSA in dilute acid hydrolysis of biomass for xylose recovery and production of high surface area activated carbon. From a production standpoint this can lead to increased use of sustainable low-cost agricultural biomass for making high surface area AC as components in supercapacitors.

关键词： Xylose C-5 biorefinery Methane sulphonic acid Delignification Activated carbon Dilute acid hydrolysis

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