Celso Foelkel

Celso Foelkel
Celsius Degree · Training, Development and Innovation

Honoris causa PhD

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96
Publications
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403
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Publications

Publications (96)
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DR. Celso Foelkel, ABTCP International Relations Director, shares his views on the paper and pulp sector's technological advancement in Brazil. At mills, the emphasis on innovation today is more centered on optimizing processes, making them more lean and productive. Many companies have substantially reduced their research groups and others have clo...
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The sector of planted forests in Brazil is recognized worldwide for its competitiveness, quality, productivity and results. This is valid for both eucalyptus and Pinus forests. The success of this achievement is thanks to the collective effort of leading forest-planting companies these past few decades in developing the necessary and appropriate te...
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In this research, it was analyzed the lignin content effect of Eucalyptus globulus wood in kraft pulping optimization. Seventy-two laboratory cooking were made with wood chips obtained from six Eucalyptus globulus trees selected from a group of 50 trees. The wood chips from three trees with the lowest lignin content, with average 20,53%, were mixed...
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In this research, it was analyzed the lignin content effect of Eucalyptus globulus Labill. wood in kraft pulping optimization. Seventy-two laboratory cooking were made with wood chips obtained from six Eucalyptus globulus trees selected from a group of 50 trees. The wood chips from three trees with the lowest lignincontent, with average 20.53%, wer...
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São descritos procedimentos para o tratamento terciário dos efluentes da Indústria Riocell S.A. (Guaíba, RS), com base no reaproveitamento de resíduos sólidos e de excedentes de processo químico. As amostras de efluente foram caracterizadas em relacão a sua cor aparente e ao seu teor em organo-halogenados sendo após, submetidas a polimento com dois...
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Effluents are one of the most important problems in a pulp mill regarding to environmental subjects. With the purpose to reduce them, the mills are closing the internal cycles and reducing the water consumption. The wood, as the most significant source of non-process elements to the system, is responsible for some troubles to the industrial process...
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Eucalyptus pulps are rich on fibers, but fibers are not the sole anatomical elements in their contents. Fibers, fiber debris, fines and vessel elements are combined in a rich blend. The papermaking behavior of the pulp depends very much on the anatomical and chemical properties of this mixture, but also in the different pulping and papermaking proc...
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Total tree utilization and multiple use of wood are alternatives to increase both silvicultural and industrial yields. Planted forests with Pinus spp. are an important source of raw material for sawmills, veneerplants, and pulp and paper mills. The use of tropical pines, especially Pinus caribaea, has been changing the geographical distribution of...
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An environmental concern in the kraft pulping is the odor caused by the reduced sulphur compounds.There are many simple equipments to detect on-line the total reduced sulphur (TRS), like the coulometric titrator. This study had as aim to measure the components of the total reduced sulphur compounds generated in kraft and pre-hydrolysis kraft labora...
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Um problema ambiental da indústria de celulose kraft é o odor causado pela emissão dos compostos reduzidos de enxofre gerados pela deslignificação de madeiras de um modo em geral. Para monitorar essas emissões, existem equipamentos simples, desenvolvidos para a medição contínua do “total reduced sulphur” (TRS), tal como o analisador coulométrico. N...
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An overview is given on the current situation as well as future directions of the pulp and paper markets of Europe, South America, and South Africa. A close look at each region shows that despite some difficulties, future prospects are good.
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O presente trabalho avaliou diferentes variações dos parâmetros de polpações alcalinas de cavacos de madeira de Eucalyptus saligna, tendo como objetivo estudar a influência da antraquinona (AQ), visando a diminuir os compostos reduzidos de enxofre nas emissões aéreas por meio da redução da sulfidez. Foram realizados oito cozimentos com álcali ativo...
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The purpose of this work was to analyze the characteristics of some eucalypts pulps available in the market, aiming to understand their influence in the properties of the offset papers. Another objective of this work was to show alternatives to reduce the number of laboratory tests in the pulp specifications. Thirteen (13) market pulps (Brazilian a...
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The clonal trees variability is studied and a sampling procedure for trees and wood is proposed. The evaluated properties are wood basic density, wood chemical composition, and kraft pulping properties. Wood density is found to be homogeneous and below the standards for the Eucalyptus saligna wood. At 95% significance level, the sample size for woo...
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A review of world market performance of the pulp and paper industry is presented. In Canada, the industry had a fairly quiet year in 1999 but the pace is expected to quicken in 2000. Meanwhile, the Latin America market faces mild optimism despite facing external accounts difficulties involving exchange rates. The year 1999 was a time of consolidati...
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The aim of this study was the searching of whether chronical toxicity and genotoxicity are or not present in chemical reagents applied and/or generated in reactions developing throughout the pulp cooking, deslignification and bleaching processes.
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No ramo de papel e celulose os efluentes são um dos principais problemas e o consumo de água é crítico. Os circuitos internos estão sendo fechados e as fontes de contaminação precisam ser conhecidas. Uma das fontes de contaminação destes efluentes são os minerais da madeira, matéria-prima neste tipo de indústria. Neste trabalho foi avaliada a quant...
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A commercial bleached kraft eucalyptus pulp was tested at three levels of consistency and three levels of pH. The pulp was refined in a double disk refiner. Different levels of net specific energy applied to the pulp were achieved by varying refiner throughput. Fiber length was unaffected by refining. However, the amount of fines did vary with refi...
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Este trabalho procurou avaliar a eficiência de tratamento floculante com sulfato de alumínio ou cloreto férrico para o efluente bruto neutralizado de uma indústria de celulose e papel. A filtração do efluente, removendo fibras, finos, macromoléculas e flocos naturais, permitiu expressivas reduções da cor aparente, cor real e DQO do mesmo. Enquanto...
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World-class maintenance requires open-minded and wide-view people. Learning experiences and different focuses are required. The management team must pay attention not only to traditional indices of maintenance performance but also how to improve business results. The management team must include, at a minimum, operation, engineering, maintenance, r...
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Este trabalho analisou o efeito de cinco espaçamentos de Eucalyptus dunnii (3 m x 1 m; 3 m x 1,5 m; 3 m x 2 m; 3 m x 3 m; 3 m x 4 m), para produção de celulose kraft-antraquinona, comparados com Eucalyptus grandis e Eucalyptus saligna (ambos no espaçamento 3 m x 2 m). Avaliaram-se a densidade básica e composição química da madeira original, analisa...
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O presente estudo descreve os tratamentos alternativos a que foi submetido o efluente secundário de uma indústria de celulose kraft branqueada. As amostras do efluente foram analisadas quanto ao teor de cloretos e de elementos-traço (zinco, cobre, chumbo e cádmio) e, a seguir, foram tratadas com sulfato de alumínio ou cloreto férrico, como floculan...
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Riocell SA is a major producer of bleached paper and dissolving grade pulps from eucalyptus and acacia. The mill has just installed a new medium consistency oxygen delignification (MCOD) stage. The system is enabling the mill to reduce cost, increase production capacity, and lower organics content in the bleach plant effluent.
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This work describes alternative procedures for the treatment of secondary effluent from the pulp industry using solid residues of the process (dreg, grit, heavy ash), and active carbon. The effluent samples were characterized in terms of color, content of halogenated compounds and trace elements, and then submitted to a coagulation step with ferric...
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A description is presented of a Brazilian paper and pulp mill whose environmental concept behind the mill is to keep final residues to a minimum and recover losses in the mill areas where they are generated. Effluents from various areas, except the bleaching plant, are collected in underground pipelines and conveyed to the treatment plant by gravit...
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It is well-known that wood, from the harvesting to end-use, is submitted to some extent of decay. The intensity of such deterioration depends upon several factors as: wood storage, climatic conditions, wood chemical compostttor1, kind of microorganisms, etc. It is not so often the decay on living trees, which are in perfect vital activities. The ph...
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This paper describes a new technology which is suggested for using bark as a pulp material. This technology is supposed to let the utilization of bark fibers without bringing problems to the operation of digesters, screeners, evaporators, washing filters, etc. It also brings no significant differences in pulp quality, compared with the pulp obtaine...
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SUMMARY The purpose of this investigation was the study of Eucalyptus spp wood characteristics and their unbleached sulphate pulps. The following species were analysed: E. sa1igna (8 and 13 year-old), E. paniculata (6 and 10 year-old), E. citriodora (7 and 13 year-old), E. maculata (7 year-old) and E. tereticornis (7 year-old). Regarding wood chara...
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SUMMARY The purpose of this investigation was the study of the variation on wood characteristics and sulfate pulp properties from Pinus oocarpa with the aging of the forest stands. Increasing on the following properties were observed with aging: fiber length, cell wall thickness, wood density, pulp yields, tensile, burst and tear pulp strengths. 1....
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Effluents are one of the most important problems in a pulp mill regarding to environmental subjects. With the purpose to reduce them, the mills are closing the internal cycles and reducing the
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SUMMARY This investigation had as objectives the study of the variability of slash pine wood in the radial direction and the evaluation of the end of juvenile wood formation. Wood characteristics followed the general trends found in the literature. The variability of late wood in the radial direction was more marked than the variability of early wo...
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SUMMARY Fast-growing native forest trees are of great interest on wood converting industries. Four of these wood species have been pulped by the sulphate process: "bracatinga" (Mimosa bracatinga), "embaúba" (Cecropia sp), "caixeta" (Tabebuia cassinoides) and "boleira" (Joannesia princeps). Pulp qualities were inferior to those obtained from Eucalyp...
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A study with 5 years old Eucalyptus saligna Smith wood was done to compare the characteristics of fibers in different of beating and its relationships with the physical- mechanical properties of pulp. The chips were processed by the sulfate method with further beating of pulp for 0.0, 30.0 and 45 minutes in the Jokro-Muhle refiner. Sampling for the...
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SUMMARY In the paper industry today .there is a pronounced trend towards more and more blending of different types of. pulp. There is a great interest in blending long and short libered pulps. In this work. a softwood (Pinus caribaea var. caribaea) and a hardwood (Eucalyptus saligna) kraft pulps were mixed after beating. Some of the properties of t...
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1 - INTRODUÇÃO A densidade da madeira é uma característica complexa resultante da combinação de diversos fatôres. Existem inúmeros trabalhos mostrando sua relação com as dimensões das fibras, particularmente espessura da parede, volume dos vasos e parênquimas, proporção entre madeira primaveril e outonal, e arranjo dos elementos anatômicos. Êste as...
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SUMMARY Sulfate pulping of Eucalyptus saligna wood and Bambusa vulgaris var. vitatta chip blends was studied. Cooks were performed with the mixed material. Five and ten percent bamboo over the total chip weight were investigated. As result, pulp yields and tear strength improved significantly in comparison to Eucalypt pulp, while the other properti...
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The purpose of this investigation was the study of juvenil and adult wood characteristics of Pinus elliottii and their influences on unbleached sulfate pulp. Juvenil wood shown lower basic density, fiber length and wall thickness but higher fiber diameter. Pulp yields were higher for adult wood. Higher tensile and brust strength, lower strength wer...
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Typescript. Thesis (M.S.)--State University of New York. College of Environmental Science and Forestry, Syracuse, 1973. Vita. Includes bibliographical references (leaves [70]-77).

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