Relevant bibliographies by topics / Hexaaluminat

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Hexaaluminat'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Hexaaluminat"

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Tao, Zhong Dong, Kai Huang, and Dong Fang Wu. "A Novel Hexaaluminate Material: Preparation, Characterization and Catalytic Activity in Methane Combustion." Applied Mechanics and Materials 665 (October 2014): 260–63. http://dx.doi.org/10.4028/www.scientific.net/amm.665.260.

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A novel hexaaluminate material Ca0.6La0.4FexMn1-xAl11O19 was prepared by a micro-emulsion method, and then washcoated on the cordierite substrates to produce monolithic catalysts. The obtained hexaaluminates were characterized by X-ray diffraction and scanning electron microscope. Results show that the particles of the prepared hexaaluminates samples are well-proportioned and small, and that the lower-quantity replacement of Mn2+ with Fe3+ is of benefit to forming single hexaaluminates crystal phases. After the partial replacement of Mn2+ with Fe3+ in hexaaluminate, the catalytic activity in m
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Hong, Sunghoon, Sujeong Heo, Wooram Kim, Young Jo, Young-Kwon Park, and Jong-Ki Jeon. "Catalytic Decomposition of an Energetic Ionic Liquid Solution over Hexaaluminate Catalysts." Catalysts 9, no. 1 (2019): 80. http://dx.doi.org/10.3390/catal9010080.

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The objective of this study was to determine the effect of a synthesis procedure of Sr hexaaluminate on catalytic performance during the decomposition of ionic liquid monopropellants based on ammonium dinitramide (ADN) and hydroxyl ammonium nitrate (HAN). Sr hexaaluminates were prepared via both coprecipitation and a sol–gel process. The surface area of hexaaluminate synthesized via the coprecipitation method was higher than that of hexaaluminate synthesized by the sol–gel process, and calcined at the same temperature of 1200 °C or more. This is because of the sintering of α-Al2O3 on the hexaa
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Kim, Munjeong, Jinwoo Kim, Hyojin Kim, Jeongsub Lee, Young Chul Park, and Jong-Ki Jeon. "Decomposition of Ionic Liquid Solution Over CuIr-Hexaaluminate Catalysts." Journal of Nanoscience and Nanotechnology 20, no. 7 (2020): 4466–69. http://dx.doi.org/10.1166/jnn.2020.17599.

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The objective of this study is to elucidate the catalytic performance of hexaaluminate catalysts incorporating Cu and Ir simultaneously during the decomposition of an ammonium dinitramide (ADN)-based liquid propellant. Pellet-type catalysts were prepared and their chemico-physical properties were characterized by N2 adsorption, XRD, and XRF. It was confirmed that Cu and Ir atoms are well incorporated inside the hexaaluminate matrix of the Cu(x)Ir(10-x)-hexaaluminate catalysts and the content of Ir incorporated into hexaaluminte matrix was in the range of 2.5–8.2 wt%. The Cu(7)Ir(3)-hexaalumina
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Jang, Ben W. L., R. M. Nelson, James J. Spivey, Meltem Ocal, R. Oukaci, and George Marcelin. "Catalytic oxidation of methane over hexaaluminates and hexaaluminate-supported Pd catalysts." Catalysis Today 47, no. 1-4 (1999): 103–13. http://dx.doi.org/10.1016/s0920-5861(98)00288-0.

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Utsis, Natalie, Miron V. Landau, Alexander Erenburg, and Moti Herskowitz. "Reverse Water Gas Shift by Chemical Looping with Iron-Substituted Hexaaluminate Catalysts." Catalysts 10, no. 9 (2020): 1082. http://dx.doi.org/10.3390/catal10091082.

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The Fe-substituted Ba-hexaaluminates (BaFeHAl) are active catalysts for reverse water-gas shift (RWGS) reaction conducted in chemical looping mode. Increasing of the degree of substitution of Al3+ for Fe3+ ions in co-precipitated BaHAl from 60% (BaFeHAl) to 100% (BaFe-hexaferrite, BaFeHF), growing its surface area from 5 to 30 m2/g, and promotion with potassium increased the CO capacity in isothermal RWGS-CL runs at 350–450 °C, where the hexaaluminate/hexaferrite structure is stable. Increasing H2-reduction temperature converts BaFeHAl to a thermally stable BaFeHF modification that contains ad
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Jana, P., P. S. Jayan, S. Mandal, and Koushik Biswas. "Sintering and Microstructural Modification of Seeded and Neodymium Doped Lanthanum Hexaaluminate." Materials Science Forum 835 (January 2016): 237–50. http://dx.doi.org/10.4028/www.scientific.net/msf.835.237.

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The effect of (i) heterogeneous nucleation by seeding or (ii) doping with neodymium on the formation of lanthanum hexaaluminate was studied during sol to gel conversion. The resultant dried gels were calcined at various temperatures starting from 1100°C to 1600°C for 2 h to study the phase evolution and microstructure.The combined effects of advanced sol gel processing and heterogeneous nucleation promoted the formation of lanthanum hexaaluminate phase at lower temperature (1200°C) than the conventional routes (1300°C). Lanthanum hexaaluminate phase was detected at 1200°C and 1300°C in seeded
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Ren, Xiao Guang, Fu Xia Li, Peng Li, and Wei Hou. "The Reduction Properties of Hexa Aluminates Substituted by Different Metal Ions for Denitrification System." Advanced Materials Research 734-737 (August 2013): 2364–68. http://dx.doi.org/10.4028/www.scientific.net/amr.734-737.2364.

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In this study, the hexaaluminate catalyst SrMnMAl10O19-δ（M= Cd、Co、Cu 、Fe、Ni、Zn、Zr、Cr and Y）and SrMnFexAl11-xO19-δ(x=1, 2, 4, 6, 8)have been prepared by co-precipitation method. The catalysts were characterized by powder X-ray diffraction (XRD), surface area (BET), hydrogen temperature programmed reduction (H2-TPR). The reduction catalyst properties of hexaaluminate for deNOx were evaluated by using devices of micro-evaluation. The results showed that the CO could remove NOx very well. The hexaaluminate not only have a good catalytic performance, but also can form a complete crystal calcined at
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Kang, Shinjae, and Sejin Kwon. "Preparation and Performance Evaluation of Platinum Barium Hexaaluminate Catalyst for Green Propellant Hydroxylamine Nitrate Thrusters." Materials 14, no. 11 (2021): 2828. http://dx.doi.org/10.3390/ma14112828.

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Spacecraft have monopropellant thruster systems for attitude control in the vacuum of space. Hydroxylamine nitrate is a green propellant that has high performance and low toxicity. Owing to the high adiabatic decomposition temperature of the hydroxylamine nitrate propellant, it is necessary to develop a catalyst with high thermal stability. We used a platinum barium hexaaluminate catalyst for green propellant hydroxylamine nitrate thrusters. Barium hexaaluminate support was prepared by a wet impregnation method and heat treatment. Platinum, the active material, was coated on catalyst supports.
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Zhang, Chao, Yong Ji Song, Feng Hua Shi, Cui Qing Li, and Hong Wang. "High Catalytic Activity and Stability of Hexaaluminate Catalysts for N2O Decomposition." Applied Mechanics and Materials 320 (May 2013): 665–69. http://dx.doi.org/10.4028/www.scientific.net/amm.320.665.

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In this paper, hexaaluminate oxides LaMAl12O19-σwere prepared by using M=Cu ,Ce and Zn as active components to substitute Al in the hexaaluminate lattice by co-precipitation method. The structure and properties of LaMAl11O19-σcatalyst was characterized with XRD and BET. The results showed LaCuAl11O19-σexhibited significant high catalytic activity for the decomposition reaction of N2O. Under the simulated in situ condition, LaCuAl11O19-σalso indicated significant catalytic activity and stability, with N2O conversion of 90% at 635°C.
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Roy, Rustum, D. Ravichandran, and William B. White. "Hydrothermal hexaaluminate phosphors." Journal of the Society for Information Display 4, no. 3 (1996): 183. http://dx.doi.org/10.1889/1.1985013.

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Dissertations / Theses on the topic "Hexaaluminat"

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Parsland, Charlotte. "Study of the activity of catalysts for the production of high quality biomass gasification gas : with emphasis on Ni-substituted Ba-hexaaluminates." Licentiate thesis, Linnéuniversitetet, Institutionen för byggd miljö och energiteknik (BET), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-55702.

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The fossil hydrocarbons are not inexhaustible, and their use is not without impact in our need of energy, fuels and hydrocarbons as building blocks for organic materials. The quest for renewable, environmentally more friendly technologies are in need and woody biomass is a promising candidate, well provided in the boreal parts of the world. To convert the constituents of wood into valuable gaseous products, suitable for the end use required, we need a reliable gasification technology. But to become an industrial application on full scale there are still a few issues to take into account since
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Elm, Svensson Erik. "Nanomaterials for high-temperature catalytic combustion." Licentiate thesis, Stockholm : School of Chemical Science, KTH, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4360.

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Negahdari, Zahra. "Reaction sintered alumina-lanthanum hexaaluminate composites." Aachen Shaker, 2009. http://d-nb.info/1000213897/04.

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Hissam, Jason C. "Characterization of nickel-substituted hexaaluminate catalysts." Morgantown, W. Va. : [West Virginia University Libraries], 2008. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5999.

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Thesis (M.S.)--West Virginia University, 2008.<br>Title from document title page. Document formatted into pages; contains vii, 78 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 74-76).
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Negahdari, Zahra [Verfasser]. "Reaction Sintered Alumina/Lanthanum Hexaaluminate Composites / Zahra Negahdari." Aachen : Shaker, 2010. http://d-nb.info/1124365702/34.

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Marzahl, Daniel-Timo [Verfasser]. "Rare-Earth-Doped Strontium Hexaaluminate Lasers / Daniel-Timo Marzahl." München : Verlag Dr. Hut, 2016. http://d-nb.info/1113336226/34.

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Schonhardt, Tobias. "Kinetic study of tar cracking/reforming over nickel-substitutedBa-hexaaluminate catalysts." Thesis, Linnéuniversitetet, Institutionen för teknik, TEK, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-22319.

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Gardner, Todd H. "Hexaaluminate catalysts for the partial oxidation of middle distillate fuels." Morgantown, W. Va. : [West Virginia University Libraries], 2007. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5116.

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Thesis (Ph. D.)--West Virginia University, 2007.<br>Title from document title page. Document formatted into pages; contains xii, 162 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 139-150).
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Zarur, Jury Juan Andrey 1970. "Catalytic combustion of methane with nanostructured barium hexaaluminate-based materials." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/9116.

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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, February 2000.<br>Includes bibliographical references.<br>Catalytic combustion of methane has been widely studied as an alternative to gasphase homogeneous combustion. It allows combustion to occur at high levels of excess air, leading to more complete reaction and reduced hydrocarbon emissions. It further enables combustion to proceed at lower temperatures, significantly reducing the NO" production. Noble metal systems, such as platinum and palladium, have been studied as combustion catalysts. However, noble
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Laassiri, Said. "Synthèse et caractérisation des oxydes-mixtes nanocristallins de type hexaaluminate : propriétés en mobilité d'oxygène et en catalyse d'oxydation." Thesis, Poitiers, 2013. http://www.theses.fr/2013POIT2314/document.

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Depuis les années 70, les oxydes mixtes de type hexaaluminate suscitent un intérêt certain pour les réactions catalytiques du fait de leur stabilité thermique élevée qui leur confère un fort potentiel pour les réactions à haute température. Cependant, la majorité des procédés de synthèse adoptés pour la préparation de ces derniers nécessite au moins une étape de traitement thermique à haute température afin d'achever le processus de cristallisation. Ainsi, les hexaaluminates préparées par voie chimique classique présentent des tailles de particules larges et des aires spécifiques réduites (&lt
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Book chapters on the topic "Hexaaluminat"

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Zhai, Yanqing, and Yongdan Li. "Preparation of metal supported hexaaluminate catalyst for methane combustion." In Studies in Surface Science and Catalysis. Elsevier, 2006. http://dx.doi.org/10.1016/s0167-2991(06)80966-3.

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Ersson, A. G., E. M. Johansson, and S. G. Järås. "Techniques for Preparation of Manganese-Substituted Lanthanum Hexaaluminates." In Preparation of Catalysts VII, Proceedings of the 7th International Symposium on Scientific Bases for the Preparation of Heterogeneous Catalysts. Elsevier, 1998. http://dx.doi.org/10.1016/s0167-2991(98)80226-7.

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Groppi, G., C. Cristiani, P. Forzatti, F. Berti, and S. Malloggi. "High temperature combustion of methane over hexaaluminate-supported Pd catalysts." In Natural Gas Conversion V, Proceedings ofthe 5th International Natural Gas Conversion Symposium,. Elsevier, 1998. http://dx.doi.org/10.1016/s0167-2991(98)80410-2.

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Cristiani, C., G. Groppi, P. Forzatti, E. Tronconi, G. Busca, and M. Daturi. "Comparison of perovskite and hexaaluminate-type catalysts for CO/H2-fueled gas turbine combustors." In 11th International Congress On Catalysis - 40th Anniversary, Proceedings of the 11th ICC. Elsevier, 1996. http://dx.doi.org/10.1016/s0167-2991(96)80258-8.

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Svensson, Erik Elm, Matteo Lualdi, Magali Boutonnet, and Sven G. Järås. "Catalytic Combustion of Methane over Perovskite Supported on Lanthanum Hexaaluminate Prepared Through the Microemulsion Method." In Science and Technology in Catalysis 2006. Elsevier, 2007. http://dx.doi.org/10.1016/b978-0-444-53202-2.50105-6.

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Kirichenko, O. A., O. V. Andrushkova, V. A. Ushakov, and V. A. Poluboyarov. "Preparation of cation-substituted hexaaluminates with large surface area using mechanical activation methods." In Studies in Surface Science and Catalysis. Elsevier, 1995. http://dx.doi.org/10.1016/s0167-2991(06)81827-6.

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Xu, Jinguang, Zhijian Tian, Yunpeng Xu, Zhusheng Xu, and Liwu Lin. "Reverse microemulsion synthesis of Mn-substituted barium hexaaluminate (BaMnAl11O19−α) catalysts for catalytic combustion of methane." In Studies in Surface Science and Catalysis. Elsevier, 2004. http://dx.doi.org/10.1016/s0167-2991(04)80098-3.

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Yokota, O., T. Tanaka, Z. Hou, and T. Yashima. "Hexaaluminate Catalysts of the Novel Process of Syngas Production through Catalytic Oxidation and Steam-CO2 Reforming of Methane." In Carbon Dioxide Utilization for Global Sustainability, Proceedings of 7ththe International Conference on Carbon Dioxide Utilization. Elsevier, 2004. http://dx.doi.org/10.1016/s0167-2991(04)80233-7.

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Eguchi, Koichi, Hiroshi Inoue, Koshi Sekizawa, and Hiromichi Arai. "Role of A- and B-cations in catalytic property of substituted hexaaluminate (ABAl11O19−α) for high temperature combustion." In 11th International Congress On Catalysis - 40th Anniversary, Proceedings of the 11th ICC. Elsevier, 1996. http://dx.doi.org/10.1016/s0167-2991(96)80252-7.

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Conference papers on the topic "Hexaaluminat"

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McGuire, Nicholas E., Neal P. Sullivan, Robert J. Kee, et al. "Hexaaluminate Catalysts for Fuel Reforming." In ASME 2008 6th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2008. http://dx.doi.org/10.1115/fuelcell2008-65231.

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Hexaaluminate catalysts offer excellent high-temperature stability compared to the equivalent metal-based catalysts. Their stability also lends well to use as a catalyst support. However, use of novel hexaaluminates is limited in fuel processing for fuel-cell applications. In this paper, we report on the performance of hexaaluminates as a catalyst support in the steam reforming of methane. The hexaaluminates are synthesized by a metal-exchange process using alumoxane precursors that enable a wide range of metal substitutions. Performance is evaluated using a unique stagnation-flow reactor that
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Johansson, E. Magnus, K. M. Jonny Danielsson, Anders G. Ersson, and Sven G. Järås. "Development of Hexaaluminate Catalysts for Combustion of Gasified Biomass in Gas Turbines." In ASME 1998 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/98-gt-338.

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There is an increasing interest in catalytic combustors fuelled by low-heating value (LHV) gases, with a LHV of 5–7 MJ/Nm3. This is because catalytic combustion could be advantageous compared to flame combustion with respect to stable combustion of LHV-gases and low conversions of fuel-N (mainly NH3) to NOx. In the present project, funded by the EU Joule Programme, catalytic combustion of gasified wood for gas turbine applications is studied. A synthetic gas mixture of H2, CO, CO2, H2O, CH4, N2 and NH3, that resembles the output from a fluidized bed gasifier using biomass as raw material, is u
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Torrez-Herrera, Jonathan J., S. A. Korili, and A. Gil. "Synthesis of La-hexaaluminates from aluminum-containing saline slag wastes." In 14th Mediterranean Congress of Chemical Engineering (MeCCE14). Grupo Pacífico, 2020. http://dx.doi.org/10.48158/mecce-14.dg.01.01.

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Vivien, D. "Single Crystalline Solid State Lasers Based On The Lanthanum Magnesium Hexaaluminate Matrix (LMA)." In French-Israeli Workshop on Solid-State Lasers, edited by Georges Boulon, Christian K. Jorgensen, and Renata Reisfeld. SPIE, 1989. http://dx.doi.org/10.1117/12.981458.

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GOMES, LEON BALLONI, and SAYURI OKAMOTO. "SÍNTESE DO HEXAALUMINATO DE BÁRIO PARA OBTENÇÃO DO SUPORTE DO CATALISADOR COO-MN2O3/HEXAALUMINATO DE BÁRIO PARA DECOMPOSIÇÃO DO PERÓXIDO DE HIDROGÊNIO E/OU ÓXIDO DE DINITROGÊNIO PARA APLICAÇÕES ESPACIAIS." In XIII Congresso Brasileiro de Engenharia Química em Iniciação Científica. Editora Blucher, 2019. http://dx.doi.org/10.5151/cobecic2019-erc15.

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Sattayaporn, S., P. Loiseau, G. Aka, D. T. Marzahl, and C. Krankel. "Orange, red and deep red laser performances of Pr3+-doped hexaaluminate (Sr0.7La0.3Mg0.3Al11.7O19) and melilite (SrLaGa3O7) type single crystals." In Advanced Solid State Lasers. OSA, 2017. http://dx.doi.org/10.1364/assl.2017.atu1a.4.

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Tsujikawa, Y., S. Fujii, H. Sadamori, S. Ito, and S. Katsura. "Flow Analysis of High Pressure Catalytic Combustor for Gas Turbine." In ASME 1995 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1995. http://dx.doi.org/10.1115/95-gt-351.

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The objective of this paper is modeling the mechanism of high temperature catalytic oxidation of natural gas, or methane. The model is two-dimensional steady-state, and includes axial and radial convection and diffusion of mass, momentum and energy, as well as homogeneous (gas phase) and heterogeneous (gas-surface) single step irreversible chemical reactions within a catalyst channel. Experimental investigations were also made of natural gas, or methane combustion in the presence of Mn-substituted hexaaluminate catalysts. Axial profiles of catalyst wall temperature, and gas temperature and gas
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Manrique Carrera, Arturo, Jeevan Jayasuriya, and Torsten Fransson. "Staged Lean Catalytic Combustion of Gasified Biomass for Gas Turbine Applications: An Experimental Approach to Investigate Performance of Catalysts." In ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/gt2013-95339.

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Emission demands for gas turbine utilization will become more stringent in the coming years. Currently different techniques are used to reach low levels of NOx emissions. One possible solution is the Staged Lean Catalytic Combustion. In this concept a catalysts arrangement is used to generate high temperature combustion gases. The high temperature gases could be used to feed a second combustion stage in which more fuel is injected. In this work a series of experiments were performed at the Catalytic Combustion High Pressure Test Facility at the Royal Institute of Technology (KTH) in Sweden. Th
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