- Title
- Microwave-assisted alkali pre-treatment medium for fractionation of rice straw and catalytic conversion to value-added 5-hydroxymethyl furfural and lignin production
- Creator
- Jasmine, Alice; Rajendran, Muruganantham; Thirunavukkarasu, Kavin; Abinandan, Sudharsanam; Vaidyanathan, Vinoth Kumar; Krishnamurthi, Tailarasan
- Relation
- International Journal of Biological Macromolecules Vol. 236, Issue 1 May 2023, no. 123999
- Publisher Link
- http://dx.doi.org/10.1016/j.ijbiomac.2023.123999
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2023
- Description
- In the current study, the use of microwave-assisted sodium hydroxide medium (MWSH) for pre-treatment and saccharification of rice straw to obtain sugar syrup for the production of 5-hydroxymethyl furfural (5-HMF) was investigated. The optimization of the MWSH pre-treatment was carried out using central composite methodology, resulting in a maximum reducing sugar yield of 350 mg/g of treated rice straw (TRS) and a glucose yield of 255 mg/g of TRS under the conditions of a microwave power of 681 W, a NaOH concentration of 0.54 M, and a pre-treatment time of 3 min. Additionally, the microwave assisted transformation of sugar syrup with titanium magnetic silica nanoparticle as catalyst, producing 41.1 % yield of 5-HMF from the sugar syrup after 30 min microwave irradiation at 120 °C with catalyst loading of 2.0:200 (w/v)). The structural characterization of the lignin was analysed using 1H NMR techniques, and the surface carbon (C1s spectra) and oxygen (O1s spectra) composition changes of the rice straw during pre-treatment were analysed using X-ray photoelectron spectroscopy. The rice straw based bio-refinery process which contains MWSH pretreatment followed by dehydration of sugars achieved high efficiency of 5-HMF production.
- Subject
- microwave pre-treatment; rice straw; saccharification; 5-hydroxymethyl furfural; bio-refinery
- Identifier
- http://hdl.handle.net/1959.13/1486768
- Identifier
- uon:51958
- Identifier
- ISSN:0141-8130
- Language
- eng
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