Time filter

Source Type

Agency: European Commission | Branch: H2020 | Program: RIA | Phase: EeB-06-2015 | Award Amount: 5.91M | Year: 2015

The CREATE project aims to tackle the thermal energy storage challenge for the built environment by developing a compact heat storage. This heat battery allows for better use of available renewables in two ways: 1) bridging the gap between supply and demand of renewables and 2) increasing the efficiency in the energy grid by converting electricity peaks into stored heat to be used later, increasing the energy grid flexibility and giving options for tradability and economic benefits. The main aim of CREATE is to develop and demonstrate a heat battery, ie an advanced thermal storage system based on Thermo-Chemical Materials, that enables economically affordable, compact and loss-free storage of heat in existing buildings. The CREATE concept is to develop stabilized storage materials with high storage density, improved stability and low price, and package them in optimized heat exchangers, using optimized storage modules. Full scale demonstration will be done in a real building, with regulatory/normative, economic and market boundaries taken into account. To ensure successful exploitation, the full knowledge, value, and supply chain are mobilized in the present consortium. It will be the game changer in the transformation of our existing building stock towards near-zero energy buildings. WP1 Management,WP2 Cost Analysis and planning for future commercial products cost,WP3 System definition,design and simulation,WP4 Thermal storage materials optimization (key breakthroughs),WP5 Critical storage components and technology development (key breakthroughs),WP6 Thermal storage reactor design, implementation and test,WP7 System integration, experiments and optimization,WP8 Building integration and full scale demonstration,WP9 Dissemination and exploitation of results. CREATE will create viable supply chain by bringing together multiple scientific disciplines and industry. In other words, CREATE envisions a multi-scale, multi-disciplinary and multi-stakeholder approach.

Cuers J.,TU Braunschweig | Unterieser I.,TU Braunschweig | Burchard W.,Albert Ludwigs University of Freiburg | Adden R.,Dow Wolff Cellulosics GmbH | And 3 more authors.
Carbohydrate Research | Year: 2012

Substituent patterns in oligosaccharide derivatives obtained from methyl cellulose were determined up to DP10 by electrospray ionization mass spectrometry employing separation of the oligomer fractions by HPLC. Oligosaccharides were labeled with meta-aminobenzoic acid after perdeuteromethylation and partial hydrolysis of methyl cellulose, enabling simultaneous quantification according to DP by HPLC/UV. Control of the HPLC-method was performed with a defined oligomer mixture obtained from β-cyclodextrin. Results from LC-ESI-MS are discussed in comparison with those from syringe pump injection and compared to a calculated pattern for a random distribution. Programing of instrumental parameters optimized for each DP and avoidance of competition of successively eluting analytes in the electrospray process allowed extension of the established method for determination of the substitution pattern of cellulose derivatives along the polymer chain from DP5 to DP10 and thus a significant gain of information. © 2011 Elsevier Ltd. All rights reserved.

Voiges K.,TU Braunschweig | Adden R.,Dow Wolff Cellulosics GmbH | Rinken M.,Dow Deutschland Anlagengesellschaft mbH | Mischnick P.,TU Braunschweig | Mischnick P.,KTH Royal Institute of Technology
Cellulose | Year: 2012

The alditol acetate method is a common procedure for sugar analysis, also applied to determine the substituent distribution in monomer units of polysaccharide ethers like methyl cellulose by gas liquid chromatography. Consisting of several preparation and work-up steps this procedure is both time consuming and prone to side reactions that promote discrimination of single constituents, especially when no peralkylation step is performed prior to hydrolysis. As a consequence results scatter in dependence on individual treatment and conditions. In the context of this work these critical points were overcome by strict but simplified work-up procedures and using acid instead of alkaline catalyzed acetylation. Under the acidic conditions the tedious removal of borate is no longer necessary and a reduced time requirement was achieved as well as good reproducibility. Comparison with independent reference methods excluded a systematic error of the method and confirmed the results obtained. Without peralkylation, i. e. in the presence of free hydroxyl groups, another fast modification of the method using DMSO as solvent, no removal of borate, and 1-methylimidazole as catalyst for acetylation was found to produce a systematic error. © 2012 Springer Science+Business Media B.V.

Agency: European Commission | Branch: FP7 | Program: CP-IP | Phase: NMP-2007-3.1-3 | Award Amount: 12.50M | Year: 2008

Current practices in risk assessment and management for industrial systems are characterized by its methodical diversity and fragmented approaches. In retrospect these risk and safety paradigms resulted from diverse industries driven and limited by available knowledge and technologies. A change based on industry driven R&D work is needed. At present the European Industry recognised their obligation to reconsider their risk and safety policies, having a more competitive industry and more risk informed and innovation accepting society in vision. Therefore the large collaborative project IRIS is proposed to identify, quantify and mitigate existing and emerging risks to create societal cost-benefits, to increase industrial safety and to reduce impact on human health and environment. The project is led and driven by the industry to consolidate and generate knowledge and technologies which enable the integration of new safety concepts related to technical, human, organizational and cultural aspects. The partnership represents over 1 million workers. The proposed project relates to strategic research topics defined by ETPIS and ECTP and is underpinning relevant EU policies on industrial safety.

Agency: European Commission | Branch: FP7 | Program: CP-FP | Phase: NMP-2008-2.5-2 | Award Amount: 4.27M | Year: 2009

In soft nanostructured materials containing polymers (such as acrylic adhesives), interfaces pose specific challenges since they are usually diffuse and can transfer stress through chain entanglements. The equilibrium structure of soft polymer interfaces is well-known, but their mechanical strength remains poorly understood. Yet many new nanostructured materials contain internal interfaces and important applications involve a contact between the soft polymer and a hard substrate. The detailed understanding and modelling of the mechanical response of these interfaces is challenging and currently prevents the use of modelling as a screening tool for new materials in important applications. We will address these problems through a specific example of application where interfaces dominate materials performance: i.e. soft nanostructured adhesives. The objectives of MODIFY is to obtain a fundamental understanding of the complex interfacial structure-related interactions in these materials through sophisticated multi-scale modelling by addressing the following issues: (i) The mechanism(s) of stress transfer at internal interfaces between soft latex particles; this needs to be done at different scales from the molecular entanglement to the finite element level. (ii) The mechanism of stress transfer at hard/soft interfaces between the substrate and the soft adhesive. (iii) The effect of the presence of multiple internal interfaces on the macroscopic rheological properties of the material, and (iv) The respective role played by the polymer rheology and the interfaces in controlling the complex deformation field experienced by the soft adhesive during debonding. If successful, we expect that the economic impact of MODIFY will lie in the design by the industrial partners with knowledge-based methods of advanced adhesives tailored to match specific known and new substrates, and with enhanced recyclability.

Mischnick P.,TU Braunschweig | Unterieser I.,TU Braunschweig | Voiges K.,TU Braunschweig | Cuers J.,TU Braunschweig | And 2 more authors.
Macromolecular Chemistry and Physics | Year: 2013

Hydroxyethylmethyl celluloses (MSHE 0.15-0.26, DSMe 1.49-1.82) and hydroxyethyl celluloses (MSHE 1.89-3.03) are analyzed with respect to their substituent distribution in the polymer chains. The cellulose ethers are peralkylated and partially hydrolyzed, and are analyzed by electrospray ionization-ion trap-mass spectrometry (ESI-IT-MS). The randomness of the partial hydrolysis is proven. Quantitative evaluation of their mass spectra becomes possible after labeling the oligosaccharides at the reducing end. Reductive amination with o-aminobenzoic acid gives better results than hydrazone formation with cationic Girard's T reagent. Syringe pump infusion gives more-accurate results compared with liquid chromatography (LC)-ESI-MS. Profiles of the substituent distribution in the oligosaccharide fractions of DP 2-DP 7 are compared with the theoretical random distribution of glucosyl units in the chain. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Peters M.,Dow Deutschland Anlagengesellschaft mbH
Institution of Mechanical Engineers - 12th European Fluid Machinery Congress | Year: 2014

Most of the referenced vertical cooling water pumps are equipped with sleeve type bearings, which are lubricated by water. Different bushing materials are in use, e.g. rubber, plastics, bronze or sometimes ceramic. In most cases the pump itself is feeding a small side stream of water to the bearing. If the water contains abrasive material, like silt or sand, wear of the shaft sleeve or the bushing will take place. The mean time between failure of this pump is most of cases less than 5 years. Reducing or eliminating wear on these bearings, will result in higher MTBF values of the whole pump. In addition, the bearing material should be robust and not brittle to handle unstable running conditions. This report describes a bearing modification which is suitable for vertical cooling water pumps which handle fresh-, brackish- and salt-water with a certain amount of silt and sand. In February 2011 the first pump was retrofitted, followed by a second in April 2011 with a third pump modified in 2012. No pump has failed so far. The goal is to run the pumps with these bearings at least 10 years without failure. © The author(s) and/or their employer(s), 2014.

Lueske J.,Dow Deutschland Anlagengesellschaft mbH | Kar K.,Dow Chemical Company | Piras L.,Dow Chemical Company | Pressler J.,Dow Chemical Company
Chemical Engineering and Technology | Year: 2015

Stirred-tank reactors (STR), in which gas and liquid phases make intimate contact for mass transfer, are quite common in chemical processes. Mechanical agitation enhances the mixing performance and the oxygen transfer capability in bio-STR, but they cannot be aerated at high rates because of impeller flooding. Another type of reactor widely used in bioprocessing is the airlift bioreactor, which consists of a draft tube and operates with an internal airlift loop. In this work, the mass transfer characteristics of a draft tube-impeller agitation system (combination of a conventional airlift and a stirred bioreactor) were investigated in a large-scale tank. The draft tube design configuration shows superior mass transfer performance compared to a conventional down-pumping agitation system consisting of a Rushton turbine combined with a pitched-blade turbine. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Cuers J.,TU Braunschweig | Rinken M.,Dow Deutschland Anlagengesellschaft MbH | Adden R.,Dow Wolff Cellulosics GmbH | Mischnick P.,TU Braunschweig
Analytical and Bioanalytical Chemistry | Year: 2013

Three hydroxypropyl methylcellulose samples (HPMC1-3, DSMe = 1.45, 1.29, and 1.36; MSHP = 0.28, 0.46, and 0.84) were analyzed with respect to their methyl and hydroxypropyl substitution pattern in the polymer chains. Ionization yield of HPMC oligomers in electrospray ionization ion trap mass spectrometry (ESI-IT-MS) is strongly influenced by the hydroxypropyl pattern. Therefore, a sample derivatization procedure, as well as suitable measurement conditions that enable relative quantification were elaborated. Analysis was performed by negative ESI-IT-MS after per(deutero)methylation, partial depolymerization, and reductive amination with m-aminobenzoic acid. Measurement parameters like solvent, trap drive, and voltages of the ion transportation unit were studied with regard to the suitability for quantitative evaluation. Using direct infusion of the samples, strong influence of trap drive and octopole settings was observed. Optimized measurement conditions were used for the determination of the HP pattern of the permethylated samples by direct infusion. The methyl pattern was determined from the perdeuteromethylated samples by high-performance liquid chromatography-electrospray tandem mass spectrometry. For HPMC1, substituents were both found to fit the random distribution model. The other two samples showed pronounced heterogeneity which could be interpreted in more detail by extracting methyl subpatterns depending on the number of HP groups. [Figure not available: see fulltext.] © 2013 Springer-Verlag Berlin Heidelberg.

Dow Deutschland Anlagengesellschaft Mbh | Date: 2011-06-01

A hand-device is described for penetrating a heat-insulating layer of a corrodible metal object and for examining a pipeline for corrosion, preferably for penetrating a heat-insulating layer of a corrodible metal pipeline, with a penetrating body that comprises a pointed section for displacing the insulating layer and a holding section for receiving a driving force, and a detecting device for generating a signal as a response to a stimulus caused by corrosion, wherein the detecting device is arranged proximally to the pointed section of the penetrating body. Corresponding methods as well as uses are also described.

Loading Dow Deutschland Anlagengesellschaft mbH collaborators
Loading Dow Deutschland Anlagengesellschaft mbH collaborators