Home / Advanced Search

  • Title/Keywords

  • Author/Affliations

  • Journal

  • Article Type

  • Start Year

  • End Year

Update SearchingClear
  • Articles
  • Online
Search Results (20)
  • Open Access

    ARTICLE

    Performance Comparison of Chemically Modified Sugarcane Bagasse for Removing Cd(II) in Water Environment

    Manh Khai Nguyen1,*, Minh Trang Hoang1,2, Thi Thuy Pham1, Bart Van der Bruggen2

    Journal of Renewable Materials, Vol.7, No.5, pp. 415-428, 2019, DOI:10.32604/jrm.2019.04371

    Abstract This paper evaluates the adsorption capacity of chemically sugarcane bagasses with sodium hydroxide (SHS), citric acid (CAS), tartaric acid (TAS) and unmodified sugarcane bagasse (SB) for cadmium adsorption in water environment. The results prove adsorption capacity for Cd (II) increases after chemical modification and the adsorption fits perfectly with the Langmuir isotherm. CAS had the highest maximum adsorption capacity of 45.45 mg/g followed by TAS with 38.46 mg/g and SHS with 29.41 at optimum pH 5.0 and 120 minutes equilibrium time while 1 g SB removed 18.8 mg Cd (II) in the same conditions. The kinetics study of the process… More >

  • Open Access

    ARTICLE

    Isolation and Characterization of Nanocellulose Obtained from Industrial Crop Waste Resources by Using Mild Acid Hydrolysis

    Galia Moreno, Karla Ramirez, Marianelly Esquivel, Guillermo Jimenez*

    Journal of Renewable Materials, Vol.6, No.4, pp. 362-369, 2018, DOI:10.7569/JRM.2017.634167

    Abstract Cellulose, microcrystalline cellulose and nanocellulose were prepared from three agricultural waste resources: pineapple leaf (PALF), banana rachis (BR), and sugarcane bagasse (SCB). Each waste resource was first converted into microcrystalline cellulose which was subsequently converted into cellulose nanoparticles by using mild (30% w/v) and strong (60% w/v) sulfuric acid concentrations for extraction. Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and thermogravimetric analysis (TGA) were used to characterize each waste resource and extracted cellulosic materials. Furthermore, nanocelluloses were studied by zeta potential, size analysis, and transmission electron microscopy (TEM). Cellulose nanowhiskers were successfully obtained and isolated with a 33% average… More >

  • Open Access

    ARTICLE

    Enzymatic Conversion of Sugarcane Lignocellulosic Biomass as a Platform for the Production of Ethanol, Enzymes and Nanocellulose

    Cristiane S. Farinas*, José Manoel Marconcini, Luiz Henrique C. Mattoso

    Journal of Renewable Materials, Vol.6, No.2, pp. 203-216, 2018, DOI:10.7569/JRM.2017.6341578

    Abstract The conversion of sugarcane lignocellulosic biomass into fuels, chemicals and high-value materials using the biochemical pathway is considered the most sustainable alternative for the implementation of future biorefineries. Actually, the first large-scale cellulosic ethanol plants that have started operating worldwide apply the enzymatic hydrolysis process to convert biomass into simple sugars that are fermented to ethanol by yeasts. However, several technological challenges still need to be addressed in order to obtain commercially competitive products. This review describes current challenges and perspectives regarding the enzymatic hydrolysis step for processing sugarcane lignocellulosic biomass within the biorefinery. Recent developments in terms of process… More >

  • Open Access

    ARTICLE

    Microfibrillated Cellulose from Sugarcane Bagasse as a Biorefinery Product for Ethanol Production

    Rafael Grande1*, Eliane Trovatti2, Maria Tereza B. Pimenta3, Antonio J. F. Carvalho1

    Journal of Renewable Materials, Vol.6, No.2, pp. 195-202, 2018, DOI:10.7569/JRM.2018.634109

    Abstract Research involving the preparation of microfibrillated cellulose (MFC) from sugarcane bagasse is a relevant topic to the production of new nanomaterials and more accessible cellulose substrates for the production of second generation ethanol. Regarding the transformation of cellulose into glucose, the precursor of second generation ethanol, this nanosized cellulosic substrate represents a more appropriate material for the chemical hydrolysis process. The high aspect ratio of MFC improves hydrolysis, requiring mild conditions and decreasing the generation of by-products. Here, MFC was prepared from sugarcane bagasse by ultrasound defibrillation. This material was oxidized with 2,2,6,6-tetramethylpiperidine-N-oxyl (TEMPO) to produce negatively charged high defibrillated… More >

  • Open Access

    ARTICLE

    Enzymatic Hydrolysis of Sugarcane Biomass and Heat Integration as Enhancers of Ethanol Production

    Reynaldo Palacios-Bereche1, Adriano Ensinas2, Marcelo Modesto1, Silvia Nebra1,3,*

    Journal of Renewable Materials, Vol.6, No.2, pp. 183-194, 2018, DOI:10.7569/JRM.2017.634175

    Abstract The aim of this study is to assess the possibility of increasing ethanol production by introducing the bagasse hydrolysis process into conventional distilleries. Simulations were performed for mass and energy balances using Aspen Plus® software. It was assumed that sugarcane trash and lignin cake—hydrolysis process residues—are available as supplementary fuel. Several cases were evaluated, including: (a) conventional ethanol distillery, (b) conventional plant combined with a hydrolysis process without heat integration, with different solid contents in the hydrolysis reactor, and (c) conventional plant combined with the hydrolysis process applying heat integration by pinch analysis. The highest ethanol yield was achieved in… More >

  • Open Access

    ARTICLE

    Influence of Sugarcane Bagasse Fiber Size on Biodegradable Composites of Thermoplastic Starch

    Bruno Henrique dos Santos, Karen de Souza do Prado, Asaph Armando Jacinto, Márcia Aparecida da Silva Spinacé*

    Journal of Renewable Materials, Vol.6, No.2, pp. 176-182, 2018, DOI:10.7569/JRM.2018.634101

    Abstract Although thermoplastic starch (TPS) is biodegradable, its low mechanical resistance limits its wide application. Sugarcane bagasse (SB) fibers can be used as reinforcement in TPS matrix composites, but the influence of fiber size on the properties of the composite is still unknown. In this study, TPS composites reinforced with SB short fibers of four sizes were processed and characterized in order to analyze the influence of fiber size on the mechanical properties of the TPS/SB composite. It was observed that the interaction between fiber and matrix was good and optimized when the fibers are sifted in sieves between 30 and… More >

  • Open Access

    ARTICLE

    Saccharification of Sugarcane Bagasse Using an Enzymatic Extract Produced by Aspergillus fumigatus

    Kênia F. R. Lamounier1, Patrisia O. Rodrigues1, Daniel Pasquini2*, Milla A. Baffi1

    Journal of Renewable Materials, Vol.6, No.2, pp. 169-175, 2018, DOI:10.7569/JRM.2017.634151

    Abstract This study investigates the efficiency of a crude enzymatic extract produced by Aspergillus fumigatus SCBM6 by solid state fermentation (SSF) in the hydrolysis of alkali pretreated sugarcane bagasse (PTB). After SSF using in natura sugarcane bagasse (SCB), the enzymatic extract presented 21.33 U.g–1 of β-glucosidase and 544.46 U.g–1of xylanase. The alkaline pretreatment with sodium hydroxide (2% NaOH (w/v) removed 43% of the lignin from PTB and the cellulosic fraction increased to 75%. The hydrolysis was optimized as a function of time, temperature, and concentration of PTB. After hydrolysis, the maximum yield (30.05%) of total released reducing sugars (TRS) was obtained… More >

  • Open Access

    ARTICLE

    Pulp and Paper from Sugarcane: Properties of Rind and Core Fractions

    Lísias Pereira Novo1,2*, Julien Bras3,4, Mohamed Naceur Belgacem3,4, Antonio Aprigio da Silva Curvelo2

    Journal of Renewable Materials, Vol.6, No.2, pp. 160-168, 2018, DOI:10.7569/JRM.2017.634165

    Abstract Two distinct lignocellulosic fractions (rind and core) can be obtained through a physical separation of sugarcane stalks. Although presenting differences in morphology, both fractions can be employed to produce pulps and papers. The pulps and paper sheets produced from the core and rind fractions were characterized by their chemical composition, physical properties and mechanical properties. The pulps obtained from the core presented a higher amount of fines, lower drainage ability and rendered denser and stiffer sheets. The pulps from the rind, which have a higher content of fibers and higher degree of polymerization, produced sheets with higher air permeability and… More >

  • Open Access

    ARTICLE

    Nanostructural Evolution of Sugarcane Rind and Pith Submitted to Hydrothermal Pretreatments

    Marcelo M. Oliveira1,2, Antônio A. S. Curvelo2,3, Carlos Driemeier1*

    Journal of Renewable Materials, Vol.6, No.2, pp. 152-159, 2018, DOI:10.7569/JRM.2017.6341576

    Abstract Lignocellulose conversion into cellulosic ethanol and coproducts starts with a pretreatment step. Most current industrial plants of cellulosic ethanol use thermochemical pretreatments under hydrothermal conditions, with or without addition of acid catalyst. Such pretreatments modify biomass chemistry and morphology, particularly at the nanoscale. In this work, we use X-ray diffraction, dynamic vapor sorption and calorimetric thermoporometry to investigate the biomass nanostructural changes promoted by hydrothermal conditions. We compare and differentiate the rind and pith fractions of sugarcane stalks in order to contribute to the understanding of rind-pith contrasting recalcitrance. Moreover, for both cane fractions our results point consistently to cellulose… More >

  • Open Access

    ARTICLE

    Alternatives of Small-Scale Biorefineries for the Integrated Production of Xylitol from Sugarcane Bagasse

    Nicolás M. Clauser1*, Soledad Gutiérrez2, María C. Area1, Fernando E. Felissia1, María E. Vallejos1

    Journal of Renewable Materials, Vol.6, No.2, pp. 139-151, 2018, DOI:10.7569/JRM.2017.634145

    Abstract Small-scale biorefinery from sugarcane bagasse offers new possibilities to the sugar and ethanol industries. The aim of this study was to evaluate the feasibility of a small-scale biorefinery for the production of xylitol from sugarcane bagasse. The liquid fraction from the autohydrolysis treatment was selected as the source of sugars for xylitol and two scenarios were analyzed for the residual solid: ethanol or pellet production. A technical-economic analysis of alternatives was applied. The internal rate of return (IRR) was used to compare the selected proposals. The highest IRR values were obtained when processing 70,000 dry tons per year of bagasse.… More >

Displaying 11-20 on page 2 of 20. Per Page