Kuhs, Werner F.

[["dc.bibliographiccitation.firstpage","4295"],["dc.bibliographiccitation.issue","17"],["dc.bibliographiccitation.journal","The Journal of Physical Chemistry Letters"],["dc.bibliographiccitation.lastpage","4299"],["dc.bibliographiccitation.volume","8"],["dc.contributor.author","Amos, Daniel M."],["dc.contributor.author","Donnelly, Mary-Ellen"],["dc.contributor.author","Teeratchanan, Pattanasak"],["dc.contributor.author","Bull, Craig L."],["dc.contributor.author","Falenty, Andrzej"],["dc.contributor.author","Kuhs, Werner F."],["dc.contributor.author","Hermann, Andreas"],["dc.contributor.author","Loveday, John S."],["dc.date.accessioned","2020-12-10T15:22:46Z"],["dc.date.available","2020-12-10T15:22:46Z"],["dc.date.issued","2017"],["dc.identifier.doi","10.1021/acs.jpclett.7b01787"],["dc.identifier.issn","1948-7185"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/16715"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/73532"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.notes.intern","Merged from goescholar"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","A Chiral Gas–Hydrate Structure Common to the Carbon Dioxide–Water and Hydrogen–Water Systems"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1437"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","Journal of Applied Crystallography"],["dc.bibliographiccitation.lastpage","1439"],["dc.bibliographiccitation.volume","52"],["dc.contributor.author","Neher, Sigmund H."],["dc.contributor.author","Klein, Helmut"],["dc.contributor.author","Kuhs, Werner F."],["dc.date.accessioned","2020-12-10T18:25:57Z"],["dc.date.available","2020-12-10T18:25:57Z"],["dc.date.issued","2019"],["dc.identifier.doi","10.1107/S1600576719012159"],["dc.identifier.eissn","1600-5767"],["dc.identifier.pmid","31798363"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/17179"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/75893"],["dc.notes.intern","DOI Import GROB-354"],["dc.notes.intern","Merged from goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","FXD-CSD-GUI : a graphical user interface for the X-ray-diffraction-based determination of crystallite size distributions"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1243"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Solid Earth"],["dc.bibliographiccitation.lastpage","1258"],["dc.bibliographiccitation.volume","7"],["dc.contributor.author","Sell, Kathleen"],["dc.contributor.author","Saenger, Erik H."],["dc.contributor.author","Falenty, Andrzej"],["dc.contributor.author","Chaouachi, Marwen"],["dc.contributor.author","Haberthur, David"],["dc.contributor.author","Enzmann, Frieder"],["dc.contributor.author","Kuhs, Werner F."],["dc.contributor.author","Kersten, Michael"],["dc.date.accessioned","2018-11-07T10:10:06Z"],["dc.date.available","2018-11-07T10:10:06Z"],["dc.date.issued","2016"],["dc.description.abstract","To date, very little is known about the distribution of natural gas hydrates in sedimentary matrices and its influence on the seismic properties of the host rock, in particular at low hydrate concentration. Digital rock physics offers a unique approach to this issue yet requires good quality, high-resolution 3-D representations for the accurate modeling of petrophysical and transport properties. Although such models are readily available via in situ synchrotron radiation Xray tomography, the analysis of such data asks for complex workflows and high computational power to maintain valuable results. Here, we present a best-practice procedure complementing data from Chaouachi et al. (2015) with data post-processing, including image enhancement and segmentation as well as exemplary numerical simulations of an acoustic wave propagation in 3-D using the derived results. A combination of the tomography and 3-D modeling opens a path to a more reliable deduction of properties of gas hydrate-bearing sediments without a reliance on idealized and frequently imprecise models."],["dc.identifier.doi","10.5194/se-7-1243-2016"],["dc.identifier.isi","000383797500002"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/13785"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/39788"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Copernicus Gesellschaft Mbh"],["dc.relation.issn","1869-9529"],["dc.relation.issn","1869-9510"],["dc.rights","CC BY 3.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/3.0/"],["dc.title","On the path to the digital rock physics of gas hydrate-bearing sediments processing of in situ synchrotron-tomography data"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","2499"],["dc.bibliographiccitation.issue","7"],["dc.bibliographiccitation.journal","Energies"],["dc.bibliographiccitation.lastpage","2523"],["dc.bibliographiccitation.volume","5"],["dc.contributor.author","Rehder, Gregor"],["dc.contributor.author","Eckl, Robert"],["dc.contributor.author","Elfgen, Markus"],["dc.contributor.author","Falenty, Andrzej"],["dc.contributor.author","Hamann, Rainer"],["dc.contributor.author","Kaehler, Nina"],["dc.contributor.author","Kuhs, Werner F."],["dc.contributor.author","Osterkamp, Hans"],["dc.contributor.author","Windmeier, Christoph"],["dc.date.accessioned","2018-11-07T09:08:31Z"],["dc.date.available","2018-11-07T09:08:31Z"],["dc.date.issued","2012"],["dc.description.abstract","Within the German integrated project SUGAR, aiming for the development of new technologies for the exploration and exploitation of submarine gas hydrates, the option of gas transport by gas hydrate pellets has been comprehensively re-investigated. A series of pVT dissociation experiments, combined with analytical tools such as x-ray diffraction and cryo-SEM, were used to gather an additional level of understanding on effects controlling ice formation. Based on these new findings and the accessible literature, knowns and unknowns of the self-preservation effect important for the technology are summarized. A conceptual process design for methane hydrate production and pelletisation has been developed. For the major steps identified, comprising (i) hydrate formation; (ii) dewatering; (iii) pelletisation; (iv) pellet cooling; and (v) pressure relief, available technologies have been evaluated, and modifications and amendments included where needed. A hydrate carrier has been designed, featuring amongst other technical solutions a pivoted cargo system with the potential to mitigate sintering, an actively cooled containment and cargo distribution system, and a dual fuel engine allowing the use of the boil-off gas. The design was constrained by the properties of gas hydrate pellets, the expected operation on continental slopes in areas with rough seas, a scenario-defined loading capacity of 20,000 m(3) methane hydrate pellets, and safety as well as environmental considerations. A risk analysis for the transport at sea has been carried out in this early stage of development, and the safety level of the new concept was compared to the safety level of other ship types with similar scopes, i.e., LNG carriers and crude oil tankers. Based on the results of the technological part of this study, and with best knowledge available on the alternative technologies, i.e., pipeline, LNG and CNG transportation, an evaluation of the economic competitiveness of the methane hydrate transport technology has been performed. The analysis considers capital investment as well as operational costs and comprises a wide set of scenarios with production rates from 20 to 800 10(3) Nm(3).h(-1) and transport distances from 200 to 10,000 km. In contrast to previous studies, the model calculations in this study reveal no economic benefit of methane hydrate transportation versus competing technologies."],["dc.description.sponsorship","German Federal Ministry of Economics and Technology (BMWi) [03SX250]"],["dc.identifier.doi","10.3390/en5072499"],["dc.identifier.isi","000306747300022"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/8773"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/26052"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Mdpi Ag"],["dc.relation.issn","1996-1073"],["dc.rights","CC BY 3.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/3.0/"],["dc.title","Methane Hydrate Pellet Transport Using the Self-Preservation Effect: A Techno-Economic Analysis"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","1076"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Nature communications"],["dc.bibliographiccitation.volume","8"],["dc.contributor.author","Ranieri, Umbertoluca"],["dc.contributor.author","Koza, Michael Marek"],["dc.contributor.author","Kuhs, Werner F."],["dc.contributor.author","Klotz, Stefan"],["dc.contributor.author","Falenty, Andrzej"],["dc.contributor.author","Gillet, Philippe"],["dc.contributor.author","Bove, Livia E."],["dc.date.accessioned","2019-07-09T11:44:41Z"],["dc.date.available","2019-07-09T11:44:41Z"],["dc.date.issued","2017-10-20"],["dc.description.abstract","Methane hydrates naturally form on Earth and in the interiors of some icy bodies of the Universe, and are also expected to play a paramount role in future energy and environmental technologies. Here we report experimental observation of an extremely fast methane diffusion at the interface of the two most common clathrate hydrate structures, namely clathrate structures I and II. Methane translational diffusion-measured by quasielastic neutron scattering at 0.8 GPa-is faster than that expected in pure supercritical methane at comparable pressure and temperature. This phenomenon could be an effect of strong confinement or of methane aggregation in the form of micro-nanobubbles at the interface of the two structures. Our results could have implications for understanding the replacement kinetics during sI-sII conversion in gas exchange experiments and for establishing the methane mobility in methane hydrates embedded in the cryosphere of large icy bodies in the Universe."],["dc.identifier.doi","10.1038/s41467-017-01167-2"],["dc.identifier.pmid","29057864"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/14869"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/59069"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.relation.issn","2041-1723"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0/"],["dc.subject.ddc","550"],["dc.title","Fast methane diffusion at the interface of two clathrate structures."],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","75"],["dc.bibliographiccitation.issue","1/4"],["dc.bibliographiccitation.journal","Textures and microstructures"],["dc.bibliographiccitation.lastpage","92"],["dc.bibliographiccitation.volume","33"],["dc.contributor.author","Schmidt, Lothar"],["dc.contributor.author","Ullrich, Martin"],["dc.contributor.author","Kuhs, Werner F."],["dc.date.accessioned","2010-08-21T10:37:23Z"],["dc.date.accessioned","2021-10-27T13:13:51Z"],["dc.date.available","2010-08-21T10:37:23Z"],["dc.date.available","2021-10-27T13:13:51Z"],["dc.date.issued","1999"],["dc.description.abstract","Neutron texture measurements on YBCO bulk samples show a very sharp texture of the superconducting phase YBa2Cu3O7-x with half-widths of less than 5°. Even with a rather coarse measurement grid of only 722 points per complete pole figure, satisfactory results for the recalculated (002) pole figures could be obtained. However, for a reliable calculation of a complete ODF, finer grids will have to be used. Due to the importance of a good alignment of the c-axes in the material, a quantitative analysis of the (002) pole figures, including an error estimation due to measurement grid and counting statistics, was made. An outline for the determination of a reliable background estimate is given."],["dc.format.mimetype","application/pdf"],["dc.identifier.doi","10.1155/TSM.33.75"],["dc.identifier.ppn","593714717"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/4459"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/91812"],["dc.language.iso","en"],["dc.notes.intern","Migrated from goescholar"],["dc.relation.issn","0730-3300"],["dc.relation.orgunit","Fakultät für Geowissenschaften und Geographie"],["dc.rights","Goescholar"],["dc.rights.access","openAccess"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.subject.ddc","540"],["dc.title","Neutron texture analysis of melt-textured YBCO bulk samples"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1587"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","ATMOSPHERIC CHEMISTRY AND PHYSICS"],["dc.bibliographiccitation.lastpage","1633"],["dc.bibliographiccitation.volume","14"],["dc.contributor.author","Bartels-Rausch, Thorsten"],["dc.contributor.author","Jacobi, H.-W."],["dc.contributor.author","Kahan, T. F."],["dc.contributor.author","Thomas, J. L."],["dc.contributor.author","Thomson, Erik S."],["dc.contributor.author","Abbatt, J. P. D."],["dc.contributor.author","Ammann, M."],["dc.contributor.author","Blackford, J. R."],["dc.contributor.author","Bluhm, H."],["dc.contributor.author","Boxe, C."],["dc.contributor.author","Domine, F."],["dc.contributor.author","Frey, M. M."],["dc.contributor.author","Gladich, I."],["dc.contributor.author","Guzman, M. I."],["dc.contributor.author","Heger, D."],["dc.contributor.author","Huthwelker, Thomas"],["dc.contributor.author","Klan, P."],["dc.contributor.author","Kuhs, Werner F."],["dc.contributor.author","Kuo, M. H."],["dc.contributor.author","Maus, S."],["dc.contributor.author","Moussa, S. G."],["dc.contributor.author","McNeill, V. F."],["dc.contributor.author","Newberg, J. T."],["dc.contributor.author","Pettersson, Jan B. C."],["dc.contributor.author","Roeselova, M."],["dc.contributor.author","Sodeau, J. R."],["dc.date.accessioned","2018-11-07T09:46:28Z"],["dc.date.available","2018-11-07T09:46:28Z"],["dc.date.issued","2014"],["dc.description.abstract","Snow in the environment acts as a host to rich chemistry and provides a matrix for physical exchange of contaminants within the ecosystem. The goal of this review is to summarise the current state of knowledge of physical processes and chemical reactivity in surface snow with relevance to polar regions. It focuses on a description of impurities in distinct compartments present in surface snow, such as snow crystals, grain boundaries, crystal surfaces, and liquid parts. It emphasises the microscopic description of the ice surface and its link with the environment. Distinct differences between the disordered air-ice interface, often termed quasi-liquid layer, and a liquid phase are highlighted. The reactivity in these different compartments of surface snow is discussed using many experimental studies, simulations, and selected snow models from the molecular to the macro-scale. Although new experimental techniques have extended our knowledge of the surface properties of ice and their impact on some single reactions and processes, others occurring on, at or within snow grains remain unquantified. The presence of liquid or liquid-like compartments either due to the formation of brine or disorder at surfaces of snow crystals below the freezing point may strongly modify reaction rates. Therefore, future experiments should include a detailed characterisation of the surface properties of the ice matrices. A further point that remains largely unresolved is the distribution of impurities between the different domains of the condensed phase inside the snowpack, i.e. in the bulk solid, in liquid at the surface or trapped in confined pockets within or between grains, or at the surface. While surface-sensitive laboratory techniques may in the future help to resolve this point for equilibrium conditions, additional uncertainty for the environmental snowpack may be caused by the highly dynamic nature of the snowpack due to the fast metamorphism occurring under certain environmental conditions. Due to these gaps in knowledge the first snow chemistry models have attempted to reproduce certain processes like the long-term incorporation of volatile compounds in snow and firn or the release of reactive species from the snowpack. Although so far none of the models offers a coupled approach of physical and chemical processes or a detailed representation of the different compartments, they have successfully been used to reproduce some field experiments. A fully coupled snow chemistry and physics model remains to be developed."],["dc.identifier.doi","10.5194/acp-14-1587-2014"],["dc.identifier.isi","000332384900028"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/10583"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/34876"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1680-7324"],["dc.relation.issn","1680-7316"],["dc.rights","CC BY 3.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/3.0/"],["dc.title","A review of air-ice chemical and physical interactions (AICI): liquids, quasi-liquids, and solids in snow"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]