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  • Open Access


    Co-Production of High-Grade Dissolving Pulp, Furfural, and Lignin from Eucalyptus via Extremely Low Acid Pretreatment and Pulping Technologies and Catalysis

    Chengxiang Li, Yue Wu, Chunhui Zhang*, Yao Liu, Qixuan Lin, Junli Ren*

    Journal of Renewable Materials, Vol.11, No.6, pp. 2555-2574, 2023, DOI:10.32604/jrm.2023.026908

    Abstract Hemicellulose and lignin are not reasonably utilized during the dissolved pulp preparation process. This work aimed to propose a process for the co-production of dissolving pulp, furfural, and lignin from eucalyptus. High-grade dissolving pulp was prepared from eucalyptus using a combination of extremely low acid (ELA) pretreatment, Kraft cooking, and elementary chlorine-free (ECF) bleaching. The obtained pre-hydrolysate was catalytic conversion into furfural in a biphasic system, and lignin during Kraft cooking and ECF was recovered. The process condition was discussed as well as the mass flow direction. The results showed that ELA pretreatment could effectively remove 80.1% hemicellulose. Compared with… More >

  • Open Access


    Effects of TiO2 Support and Cobalt Addition of Ni/TiO2 Catalyst in Selective Hydrogenation of Furfural to Furfuryl Alcohol

    Kittithad Wonglekha1,#, Weerachon Tolek1,#, Okorn Mekasuwandumrong2, Wasu Chaitree2, Piyasan Praserthdam1, Kiat Moon Lee3, Joongjai Panpranot1,3,4,*

    Journal of Renewable Materials, Vol.10, No.8, pp. 2055-2072, 2022, DOI:10.32604/jrm.2022.019680

    Abstract An effect of phase compositions (rutile, Rut and anatase, Ant) of TiO2 supports on the selective hydrogenation of furfural to furfuryl alcohol was investigated. The 15%wt Ni/TiO2 catalysts were prepared by incipient impregnation method. The result showed that Ni supported on anatase-rutile mixed phase TiO2 (91% Rut and 9% Ant, A2) provided the highest furfuryl alcohol yield at 43.8% due to the relatively strong Ni-TiO2 interaction, its appropriate crystallite sizes, and high average pore sizes. Furthermore, the effect of cobalt as a promoter on Ni/ TiO2-A2 catalysts was studied. The result showed that the Ni-Co/TiO2-A2 catalysts exhibited poorer catalyst performances… More > Graphic Abstract

    Effects of TiO<sub>2</sub> Support and Cobalt Addition of Ni/TiO<sub>2</sub> Catalyst in Selective Hydrogenation of Furfural to Furfuryl Alcohol

  • Open Access


    Differential Catalysis of Depolymerisation and Dehydration Reactions: Producing Furfural from Plant Biomass

    Nikolajs Vedernikovs*

    Journal of Renewable Materials, Vol.8, No.6, pp. 661-674, 2020, DOI:10.32604/jrm.2020.09274

    Abstract The main principles of the technological realisation of the furfural obtaining process have been formulated by Ricard [1]. Based on his recommendations, all investigators proceeded from the assumption that the depolymerisation of pentosans and the dehydration of pentoses in the one-step production of furfural from raw plant material must be accelerated with diluted catalyst solutions. According to this theory, uniform impregnation of the raw material with a catalyst solution is considered necessary. The reduction in the amount of the catalyst solution down to 30–40% of the mass of the dry raw material, suggested by Miner et al. [2], made the… More >

  • Open Access


    Hydroxymethylfurfural Hardening of Pine Tannin Wood Adhesives

    F.-J. Santiago-Medina1, A. Pizzi1,2,*, S. Abdalla2

    Journal of Renewable Materials, Vol.5, No.5, pp. 435-447, 2017, DOI:10.7569/JRM.2017.634166

    Abstract An adhesive based on the reaction of a very fast reacting procyanidin-type condensed tannin, namely purified pine bark tannin, with a biosourced nontoxic and nonvolatile aldehyde derived from the pulp and paper industry, namely hydroxymethylfurfural (HMF), was shown to almost satisfy the relevant standards for bonding wood particleboard. The conditions of pH used are determinant for the result. The oligomers obtained by the reaction and their distribution have been determined by matrix-assisted laser ionization desorption time-of-flight (MALDI-TOF) mass spectrometry. Of the two reactive groups of hydroxymethylfurfural capable of reacting, the furanic aldehyde one and the furanic hydroxymethyl alcohol group, only… More >

  • Open Access


    Investigation of the Short-Time Photodissociation Dynamics of Furfural in S2 State by Resonance Raman and Quantum Chemistry Calculations

    Kemei Pei1,*, Yueben Dong1, Lei Chen1

    CMC-Computers, Materials & Continua, Vol.55, No.1, pp. 189-200, 2018, DOI:10.3970/cmc.2018.055.189

    Abstract Raman (resonance Raman, FT-Raman), IR and UV-visible spectroscopy and quantum chemistry calculations were used to investigate the photodissociation dynamics of furfural in S2 state. The resonance Raman(RR) spectra indicate that the photorelaxation dynamics for the S0→S2 excited state is predominantly along nine motions: C=O stretch ν5 (1667 cm-1), ring C=C antisymmetric stretch ν6 (1570 cm-1), ring C=C symmetric stretch ν7 (1472 cm-1), C2-O6-C5 symmetric stretch/C1-H8 rock in plane ν8 (1389 cm-1), C3-C4 stretch/ C1-H8 rock in plane ν9 (1370 cm-1), C5-O6 stretch in plane ν12 (1154 cm-1), ring breath ν13 (1077 cm-1), C3-C4 stretch ν14 (1020 cm-1), C3-C2-O6 symmetric stretch… More >

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