A5028264931- Lignin and Wood Chemistry
- Agricultural and Food Sciences
- Biofuel production and bioconversion
- Advanced Cellulose Research Studies
- Forest ecology and management
- Thermochemical Biomass Conversion Processes
- Enzyme-mediated dye degradation
- Wood Treatment and Properties
- Natural Fiber Reinforced Composites
- Fermentation and Sensory Analysis
- biodegradable polymer synthesis and properties
- Material Properties and Processing
- Forest Biomass Utilization and Management
- Catalysis for Biomass Conversion
- Rural Development and Agriculture
- Sugarcane Cultivation and Processing
- Electrospun Nanofibers in Biomedical Applications
- Growth and nutrition in plants
- Microbial Metabolic Engineering and Bioproduction
- Tree Root and Stability Studies
- Bamboo properties and applications
- Indoor Air Quality and Microbial Exposure
- Photovoltaic Systems and Sustainability
- Agroforestry and silvopastoral systems
- Nutritional Studies and Diet
Universidade Federal Rural do Rio de Janeiro
2016-2025
Universidade Federal do Ceará
2025
Southwest Bahia State University
2023
Universidade Federal de Viçosa
2008-2018
Universidade Federal do Rio de Janeiro
2018
Institute of Polymers
2018
Universidade Federal de Uberlândia
2017
Departamento de Ciência e Tecnologia
2017
Commercial bamboo chips were evaluated as raw material for dissolving pulp production. The auto-hydrolyzed (AH) and subsequently cooked by the NaOH/AQ process bleached to full brightness with O-CCE-D-(EP)-D-P sequence. term CCE designates a cold caustic extraction stage. chip chemistry (22.4% lignin, 19.5% xylans, 49.3% cellulose, 16.8% total extractives, 1.5% ash) was apparently unfavorable; however high quality produced using aforementioned technologies, even when compared results obtained...
Eucalypt wood is becoming the most important raw material for pulp industries in South America. However, due to high cost comparison other sources, nonwoody materials are also being investigated aiming at production. In this way, paper aimed evaluation of eighteen eucalypt clones obtained from Brazilian Genolyptus project, regarding their potential characteristics Aiming same goal, two species elephant grass were evaluated as alternative sources. Through analyses anatomic and chemical...
Biorefinery is a new term to designate two main subjects, bioproducts and bioenergy, which play important roles towards more bio-based society. This paper reviews the current biorefineries model as well its future importance focusing on pulp mill opportunities. There are currently several different levels of integration in add their sustainability, both economically environmentally. Enzymatic pretreatment for biomass deconstruction aiming release polysaccharides key technology it subject...
Abstract This study focused on the production of furfural from agricultural and industrial biomass residues by a hydrodistillation process. Corncobs, sugarcane bagasse, eucalypt wood were treated with sulfuric, hydrochloric, phosphoric acids as catalysts, different acid concentrations (1.5 to 5.2 mol.L −1). In addition, liquor auto-hydrolysis, kraft-dissolving pulp process was also investigated source furfural, using sulfuric hydrochloric catalyst (0.9 3.9 −1) . Furfural yields 30.2, 25.8,...
Abstract Brazil has 8.51 million km 2 of territorial area and a tropical climate. In 2010, the occupation Brazilian soil consists 20.8% pasture, 6.8% agriculture, 0.8% forested areas, 61.0% natural forests, 9.7% other areas. 2012, total country 3.25% (27.65 ha) is occupied by soy bean cultivation 1% (8.5 sugar cane cultivation. main cultivated species in were Eucalyptus spp. (71.0%), Pinus (21.75%), Acacia mearnsii mangium (2.12%), Hevea brasiliensis (2.36%), Schizolobium amazonicum (1.22%)....
Wood autohydrolysis for xylan removal prior to kraft pulping and the consequences of this practice downstream in a pulp mill has been investigated. Chip 60 min at 165 °C removed 61% xylans, but subsequent cooking produced 9.4% lower yield than reference. Pulp from 60-min autohydrolyzed chips showed 75% efficiency oxygen delignification compared 43.6% reference, resulting ECF bleaching cost reduction 36% significant effluent improvement. The chip process resulted higher bulk, beatability...
http://dx.doi.org/10.5902/1980509812359O objetivo deste estudo foi avaliar diferentes regimes de desbaste em plantios silviculturais clones eucalipto (Eucalyptus urophylla x Eucalyptus grandis) para produção madeira visando à obtenção celulose e carvão com a finalidade verificar se este efeito poderia afetar quantitativamente proporção dos componentes químicos da madeira. O espaçamento inicial médio entre plantas 3 m os tratamentos foram: T1= testemunha, T2, T3 T4 20%, 35% 50% área basal...
Lignin-carbohydrates complexes influence many chemical properties in the wood, such as difficult-to-remove lignin from Kraft pulps at end of pulping due to occurrence carbohydrates bonds. Therefore, this study aimed lignin-carbohydrate on eucalyptus pulping. Spectroscopic techniques (13C NMR and HSQC-2D) were applied for determination quantification complex (LCC) structures, then evaluated effect LCC hybrids. The analytical tools allowed identification benzyl ether, γ-ester, phenyl glucoside...
Concerns about climate change and other issues mostly related to the reduction of fossil fuel usage have increased demand for renewable energy sources. The possibility using lignocellulosic biomass generation is gaining interest in many countries worldwide. current paper presents analysis physicochemical characteristics nine biomasses: five types eucalyptus wood chips, sugar cane bagasse, elephant grass, bamboo, coconut husk. Selection a thermal conversion technology depends on knowledge...
BIOMETHANOL PRODUCTION VIA GASIFICATION OF LIGNOCELLULOSIC BIOMASS.With rising global energy demands and the perception of an imminent lack petroleum, a main source energy, comes big rush for renewable sustainable energetic sources.In Brazil, reasonable fraction from biomass, with increasing potential, not only direct production in combustion but also as feedstock chemical industry.In this context, Bio-Methanol arises one possible substitutes petroleum fuels, since it can come sources, has...
Elephant grass (Pennisetum purpureum) (EG) is a fast-growing plant with high biomass productivity in the range of 30-45 bone dry t/ha/yr. This qualifies EG as potential raw material for bleached pulp production. study evaluated elephant paper was accomplished through determining its full chemical and morphological characterization, pulpability at kappa numbers 15 20 via kraft soda-AQ processes, bleachability to 90% ISO brightness. The results were compared those commercial hybrid eucalyptus...
Lignocellulosic biomass has been widely investigated as a natural renewable source of feedstocks to produce high value added products which can replace energy and materials obtained from non-renewable sources. Polymers are largely employed in industry many different applications, nowadays mostly produced petrochemical derivatives, generating huge amounts waste difficult treatment prior disposal. In order these polymers derived petroleum, efforts have made the development biopolymers,...
Brazil is the world largest producer of sugarcane (Saccharum officinarum) leading to a great generation residues such as bagasse and straw, which represent two thirds energetic potential. Regarding these potential, it interesting study their application in biorefinery processes. Thus, this work aimed at performing chemical characterization straw from RB867515 cultivar grown Rio Grande do Sul-Brazil aiming use feedstock The obtained results were compared data other states was possible...
Abstract Nanocelluloses produced from wood pulp are widely studied for various economic applications. Most studies of cellulose nanofibrils (CNF) use lignin-free fibres obtained bleached pulps; however, unbleached with residual lignin may also be used to obtain lignocelluloses (LCNF). Research on lignocellulose is a recent subject in the field; thus, aim present study was determine ultrastructure compared same raw material. Understanding nanoparticle properties great relevance their...
This study aimed to assess the effect of mechanical pretreatment on bleached eucalyptus kraft pulp fibers and investigate influence reaction time temperature properties yield nanocrystalline cellulose (NCC) microcrystalline (MCC). Two types pulps were hydrolyzed, 1 (control, whole fibers) 2 (mechanically pretreated, disintegrated fibers). NCC MCC particles obtained by sulfuric acid hydrolysis (60% w/w) under different conditions (30–120 min) (45–55 °C). Physical treatment facilitated...