Wurster H.,UPM Kymmene
International Paperworld IPW | Year: 2010
One of the significant challenges facing paper manufacturing involves finding technological solutions that can be implemented without depending on mineral oil as raw material. Capital intensity can be reduced with simplified on-site process solutions that reduce the number of unit operations, standardize paper machine concepts, and combine chemistry and physics with innovative process design. Exploration, evaluation, and implementation of new technologies, such as nanotechnology and biotechnology is needed to overcome these challenges. Key resources will be energy, water and raw materials with competitive prices. It is expected future success of papermaking will be based on renewable and recyclable raw materials, along with intelligent and lean processes.
Engblom M.,Abo Akademi University |
Brink A.,Abo Akademi University |
Ronnqvist A.,UPM Kymmene |
Mueller C.,Clyde Bergemann Inc. |
And 2 more authors.
International Chemical Recovery Conference | Year: 2010
This paper aims at increased understanding of the dynamics of char bed processes and their impact on the operation of the recovery boiler. As part of a comprehensive measurement campaign of a 4450 tds/day Kraft recovery boiler, different operational modes of char bed burning were used. These included (i) stable operation, (ii) char bed growth, and (iii) char bed depletion. Videos from IR furnace cameras are used for monitoring the response of the char bed to changes in recovery boiler operation. Physical transport processes affecting bed shape are visually identified from the video. The impact of char bed dynamics on boiler steam production is shown, and oxygen consumption calorimetry is used to confirm cyclic changes in in-furnace burning rate as the cause. Computational fluid dynamics (CFD) simulations - including char bed shape - are carried out for comparison with the video observations. The simulations show the capability of current steady-state models to predict long term growth or depletion of the char bed, but time-dependent simulations are needed if true char bed dynamics are to be simulated.
Harkonen M.,VTT Technical Research Center of Finland |
Tammelin T.,VTT Technical Research Center of Finland |
Lille M.,VTT Technical Research Center of Finland |
Qvintus P.,VTT Technical Research Center of Finland |
And 2 more authors.
VTT Symposium (Valtion Teknillinen Tutkimuskeskus) | Year: 2010
The forest industry is seeking new technological solutions and products. One very interesting possibility is the production and utilisation of cellulose nanofibers for new types of materials and novel applications. These new opportunities are being developed at the Finnish Centre of Nanosellulosic Technologies launched in spring 2008 by VTT, Helsinki University of Technology (TKK) and the UPM-Kymmene Corporation. The centre employs about 40 persons, and the project portfolio, which addresses production technology, physical and chemical modification, characterization and novel applications, is financed by public and private investments.
Kajanto I.,UPM Kymmene |
Kosonen M.,UPM Kymmene
J-FOR | Year: 2012
The use of nanofibrillar cellulose as a reinforcement agent in paper has been evaluated on a high-speed pilot paper machine. Using mill pulp and mill process waters, two different grades of nanocellulose were tested at 1% and 2% addition levels together with 1% of cationic starch. The results indicate significant increase in tensile strength, enabling up to 8 g/m2 grammage reduction. Paper had a slightly lower scattering coefficient and lower air permeability. Wire-section dewatering was reduced a little, with a loss of less than one percentage point of solids content, whereas dry matter after wet pressing even increased upon nanocellulose addition. The reason for this unexpected observation is still unclear. Total retention remained constant after nanocellulose addition was started.
Heuser B.,RWTH Aachen |
Vauhkonen V.,UPM Kymmene |
Mannonen S.,UPM Kymmene |
Rohs H.,FEV GmbH |
Kolbeck A.,FEV GmbH
SAE International Journal of Fuels and Lubricants | Year: 2013
The residue and waste streams of existing industry offer feasible and sustainable raw materials for biofuel production. All kind of biomass contains carbon and hydrogen which can be turned into liquid form with suitable processes. Using hydrotreatment or Biomass-to-Liquid technologies (BTL) the liquid oil can be further converted into transportation biofuels. Hydrotreatment technology can be used to convert bio-oils and fats in to high quality diesel fuels that have superior fuel properties (e.g. low aromatic content and high cetane number) compared to regular diesel fuel and first generation ester-type diesel fuel. UPM has developed a new innovative technology based on hydrotreatment that can be used to convert Crude Tall Oil (CTO) into high quality renewable diesel fuel. This study concentrated on determining the functionality and possible effects of CTO based renewable diesel as a blending component on engine emissions and engine performance. Tested fuels were Euro Stage IV diesel (CEC RF-06-03) as reference fuel and 30% CTO renewable diesel, blended with Euro Stage IV diesel. The results showed that CTO based renewable diesel blend properties were comparable to those of the reference diesel and fulfilled the limits set by the EN590 diesel standard. The engine performance as well as the engine emissions was similar with both fuels. For initial engine test, the renewable diesel was blended with RF-06-03 CEC reference fuel. During an intense test bench campaign engine load was varied from low load conditions up to full load. These tests revealed, that a blend of v./v. 30 % of the renewable diesel is perfectly suited for operation in a state-of-the-art diesel engine passenger car. Copyright © 2013 SAE International and Copyright © 2013 KSAE.