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Dissertations / Theses on the topic 'Ash reaction'

Author: Grafiati

Published: 4 June 2021

Last updated: 8 February 2022

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1

Wang, Shuangzhen. "Biomass and Coal Fly Ash in Concrete: Strength, Durability, Microstructure, Quantitative Kinetics of Pozzolanic Reaction and Alkali Silica Reaction Investigations." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd1819.pdf.

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Bleszynski, Roland F. "Study of the effects of fly ash on alkali-silica reaction in concrete." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0024/MQ51606.pdf.

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3

Shehata, Medhat H. "The effects of fly ash and silica fume on alkali-silica reaction in concrete." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/NQ58597.pdf.

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4

Heyns, M. W., and M. Mostafa Hassan. "South Africa Class F Fly Ash for roads : physical and chemical analysis." Interim : Interdisciplinary Journal, Vol 13, Issue 3: Central University of Technology Free State Bloemfontein, 2013. http://hdl.handle.net/11462/310.

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Published Article<br>Fly Ash is a by-product at thermal power stations, also otherwise known as residues of fine particles that rise with flue gases. An industrial by-product may be inferior to the traditional materials used construction applications, but, the lower the cost of these inferior materials make it an attractive alternative if adequate performance can be achieved. The objective of this study is to evaluate the chemical and physical effectiveness of self-cementing fly ashes derived from thermal power stations for construction applications with combined standards. Using laboratory te

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Hlatywayo, Tapiwa. "Coal fly ash and acid mine drainage based heterogeneous Fe catalysts Friedel-Crafts alkylation reaction." University of Western Cape, 2020. https://hdl.handle.net/11394/7295.

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Philosophiae Doctor - PhD<br>The catalytic support materials used in the present study are zeolite HBEA and MCM-41. These high silica zeolites were synthesised from coal fly ash (CFA) waste via a novel approach that involved a fusion step, acid assisted silica extraction and removal of Al, Ca and Na from the silica by treatment with oxalic acid. The generated silica was converted to HBEA and MCM-41 via conventional hydrothermal treatment. The metal incorporation onto HBEA was done via two approaches namely; liquid phase ion exchange (LIE) and wet impregnation (WI) while the loading on MCM-41 w

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Kaitano, Rufaro. "Characterisation and reaction kinetics of high ash chars derived from inertinite-rich coal discards / Rufaro Kaitano." Thesis, North-West University, 2007. http://hdl.handle.net/10394/1501.

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An investigation was undertaken to determine the gasification and combustion characteristics of chars derived from an inertinite-rich coal discard sample with a high ash content. Fundamental knowledge of the reaction rate kinetics for char conversion at reactions conditions used in fluidised bed gasification and combustion was obtained. For this purpose, characterisation of the parent coal and derived chars, reactivity determinations of the chars and detailed reaction rate modelling was undertaken. The characterisation performed consisted of standard coal analytical methods. petrographic techn

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7

Sun, Zengqing [Verfasser], Anya [Akademischer Betreuer] Vollpracht, and Frank [Akademischer Betreuer] Dehn. "Reaction mechanisms of fly ash and metakaolin geopolymers and environmental compatibility / Zengqing Sun ; Anya Vollpracht, Frank Dehn." Aachen : Universitätsbibliothek der RWTH Aachen, 2020. http://d-nb.info/1218788313/34.

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Burgers, C. L. (Colleen Lucie). "Synthesis and characterisation of sesquioxidic precipitates formed by the reaction of acid mine drainage with fly ash leachate." Thesis, Stellenbosch : University of Stellenbosch, 2003. http://hdl.handle.net/10019.1/16266.

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Thesis (MScAgric)--University of Stellenbosch, 2003.<br>ENGLISH ABSTRACT: Coal mining in South Africa is estimated to produce 200 Ml of acid mine drainage (AMD) per day in the Pretoria-Witwatersrand-Vereeniging (PWV) area alone, while electricity production resulted in approximately 27 Mt of ash in 2001. A large number of collieries in South Africa are tied to power stations where these two waste streams, acid mine drainage and fly ash, have the capacity to neutralize each other and provide an opportunity for co-disposal. The aim of this study was to investigate the reactions that occur

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9

Duddy, Margaret Mary. "An investigation into the suppression of the alkali-silica reaction in concrete by the use of pulverised fuel ash." Thesis, University of Hertfordshire, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260799.

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McCarthy, Fiona Materials Science &amp Engineering Faculty of Science UNSW. "Interfacial phenomena and dissolution of carbon from chars into liquid iron during pulverised coal injection in a blast furnace." Awarded by:University of New South Wales. School of Materials Science and Engineering, 2005. http://handle.unsw.edu.au/1959.4/20797.

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As carbon dissolution rates have been determined for a few chars only, a systematic and comprehensive study was undertaken in this project on the dissolution behaviour of carbon from non-graphitic materials into liquid iron. In addition to measuring the kinetics of carbon dissolution from a number of coal chars into liquid iron as a function of parent coal and coal ash composition, the influence of chemical reactions between solute/solid carbon and ash oxides was also investigated. These studies were supplemented with investigations on one metallurgical coke for the sake of comparison. The wet

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Okolo, Gregori Nworah. "The effects of chemical and physical properties of chars derived from inertinite–rich, high ash coals on gasification reaction kinetics / Gregory Nworah Okolo." Thesis, North-West University, 2010. http://hdl.handle.net/10394/4890.

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With the increasing global energy demand and the decreasing availability of good quality coals, a better understanding of the important properties that control the behaviour of low–grade coals and the subsequent chars in various utilisation processes, becomes pertinent. An investigation was therefore undertaken, to study the effects of chemical and physical properties imparted on chars during pyrolysis on the subsequent gasification reaction kinetics of typical South African inertinite–rich, high ash Highveld coals. An attempt was made at following these changes in the transition from coals to

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12

Galvánková, Lucie. "Možnosti využití vedlejších energetických produktů jako surovin pro hydrotermální reakce." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2015. http://www.nusl.cz/ntk/nusl-217109.

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The aim of this master thesis is study of possibilities of processing energy by-products, especially coal fly ash and fluidized bed ash, by hydrothermal treatment. Thanks to hydrothermal conditions and proper alkali activation of ashes we can obtain zeolites. Zeolites are microporous crystalline aluminosilicates which are use in many industrial sectors as catalysts, adsorbents and very good ion exchangers. The results of hydrothermal synthesis are influenced by many variable factors. This thesis mainly focused on influence of chosen alkali activator and the concentration of the activator toget

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Roubal, David. "Vývoj vysokopevnostních betonů s vysokým obsahem el. popílků." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-392363.

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This diploma thesis deals with the study of high-strength, high-volume fly ash concrete. The theoretical part of this thesis focuses on the detailed characteristic and main principles of high-strength concrete, high-volume fly ash concrete. In addition, according to the findings, the technology of high-strength and high-volume fly ash concrete, including principles of high strength, has been described. On the basis of the findings, high-strength, high-volume fly ash concrete for specific compressive strengths has been designed and created in the experimental section. These concretes were then

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Deschner, Florian [Verfasser], Jürgen [Akademischer Betreuer] Neubauer, Christian [Akademischer Betreuer] Kaps, and Frank [Akademischer Betreuer] Winnefeld. "Reaction of siliceous fly ash in blended Portland cement pastes and its effect on the chemistry of hydrate phases and pore solution / Florian Deschner. Gutachter: Jürgen Neubauer ; Christian Kaps ; Frank Winnefeld." Erlangen : Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 2014. http://d-nb.info/1054731675/34.

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Trindade, Guilherme Hoehr. "Influência da incorporação de cinza da casca do arroz e sílica ativa no cimento Portland frente à reação álcali-sílica : desenvolvimento de uma nova proposta de método para avaliação da RAS em materiais suplementares ao cimento Portland." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/131343.

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Alguns materiais, constituídos quase que exclusivamente por sílica, são empregados, de forma suplementar ao cimento Portland, por promoverem melhorias ao concreto, devido aos seus efeitos físicos e pozolânicos, além de atenderem a questões ambientais. No entanto, essa sílica pode gerar produtos indesejados na presença de álcalis, sendo este fenômeno conhecido como reação álcali sílica (RAS). Na presença de água, esses produtos são capazes de expandir no interior da massa de concreto, provocando fissuras internas e externas e, em casos mais graves, a degradação do elemento estrutural. Com a fin

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Munhoz, Flávio André da Cunha. "Efeito de adições ativas na mitigação das reações álcali-sílica e álcali-silicato." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/3/3146/tde-10012008-100734/.

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A reação álcali-agregado é uma manifestação patológica diretamente ligada à seleção dos materiais (cimento, agregados miúdo e graúdo, água e aditivos) que pode comprometer a durabilidade das estruturas de concreto, uma vez que a interação desses materiais e as condições ambientais é que vão conferir ao concreto determinadas propriedades ligadas à sua vida útil. A reação entre os hidróxidos alcalinos solubilizados na fase líquida dos poros dos concretos e alguns agregados reativos é lenta e resulta em um gel que, ao se acumular em vazios do concreto e na interface pasta-agregado, na presença de

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Silveira, Adriana Augustin. "Contribuição ao estudo do efeito da incorporação de cinza de casca de arroz em concretos submetidos à reação álcali-agregado." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2007. http://hdl.handle.net/10183/17556.

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A reação álcali-agregado no concreto é um fenômeno que tem como causa uma reação química que ocorre entre os hidróxidos alcalinos provenientes do cimento e alguns minerais reativos presentes no agregado. Esta reação pode causar a deterioração do concreto, pois os seus subprodutos podem tornar-se expansivos na presença de umidade, originando fissuração, diminuição da resistência, aumento da permeabilidade e, eventualmente, a ruptura da estrutura. O uso de adições minerais em concretos suscetíveis à reação álcali-agregado tem sido apontado como uma alternativa eficiente na prevenção da reação ex

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18

BERTOLINI, THARCILA C. R. "Estudo comparativo sobre a adsorção de diferentes classes de corantes em zeólitas de cinzas de carvão: modelagem cinética e de equilíbrio." reponame:Repositório Institucional do IPEN, 2014. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10557.

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Made available in DSpace on 2014-10-09T12:41:55Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:07:16Z (GMT). No. of bitstreams: 0<br>Dissertação (Mestrado)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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19

Ekeroth, William. "Cutting Corners: Combination of Purification and Reactor Design of a Flow-Through Enzyme Reaction, using StEH1 and ADH-A." Thesis, Uppsala universitet, Institutionen för kemi - BMC, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-454061.

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Trindade, Guilherme Höehr. "DURABILIDADE DO CONCRETO COM CINZA DE CASCA DE ARROZ NATURAL SEM MOAGEM: MITIGAÇÃO DA REAÇÃO ÁLCALI-SÍLICA E PENETRAÇÃO DE CLORETOS." Universidade Federal de Santa Maria, 2011. http://repositorio.ufsm.br/handle/1/7764.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Natural rice husk ash (RHA) used in concrete contributes to civil construction sustainability. In fact, RHA is considered a residual pollutant and then it is necessary to destine this material correctly. However, it is necessary to investigate the consequences of replacing part of cement by natural RHA to produce concrete for structural purposes. In this context, the aim of this study was to evaluate the concrete durability produced with 15 % of blinder partial replacement by natural RHA in the expansion due to alkali-silica reacti

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21

Blanchard, Ryan P. "Measurements and Modeling of Coal Ash Deposition in an Entrained-Flow Reactor." Diss., CLICK HERE for online access, 2008. http://contentdm.lib.byu.edu/ETD/image/etd2376.pdf.

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22

Skoglund, Nils. "Ash chemistry and fuel design focusing on combustion of phosphorus-rich biomass." Doctoral thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-88505.

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Biomass is increasingly used as a feedstock in global energy production. This may present operational challenges in energy conversion processes which are related to the inorganic content of these biomasses. As a larger variety of biomass is used the need for a basic understanding of ash transformation reactions becomes increasingly important. This is not only to reduce operational problems but also to facilitate the use of ash as a nutrient source for new biomass production. Ash transformation reactions were examined in the present work using the Lewis acid-base concept. The model presented in

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Morar, Doina Lorena. "Release of inorganic and organic contaminants from fly ash amended permeable reactive barriers." College Park, Md.: University of Maryland, 2008. http://hdl.handle.net/1903/7855.

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Thesis (M.S.) -- University of Maryland, College Park, 2008.<br>Thesis research directed by: Dept. of Civil and Environmental Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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Lewis, Tony. "Mechanisms of lung injury caused by residual oil fly ash role of metal-induced reactive oxygen species /." Morgantown, W. Va. : [West Virginia University Libraries], 2001. http://etd.wvu.edu/templates/showETD.cfm?recnum=2210.

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Thesis (M.S.)--West Virginia University, 2001.<br>Title from document title page. Document formatted into pages; contains vii, 53 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 48-53).

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Millard, Marcus J. "Effects of Lithium Nitrate Admixture on Early Age Concrete Behavior." Thesis, Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/11615.

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Alkali silica reaction (ASR), a reaction which occurs between reactive siliceous mineral components in the aggregate and the alkaline pore solution in concrete, is responsible for substantial damage to concrete structures in the U. S. and across the world. Lithium admixtures, including lithium nitrate (LiNO3), have been demonstrated to mitigate ASR damage, and are of particular interest for use in concrete airfield pavement construction, where ASR damage has been recently linked to the use of certain de-icing chemicals. Although the effectiveness of lithium admixtures at ASR-mitigation is we

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Ballagi-Pordány, András. "Application of polymerase chain reaction (PCR) in veterinary virology /." Uppsala : Sveriges lantbruksuniv, 1995. http://epsilon.slu.se/avh/1995/91-576-4997-9.gif.

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Ahmed, Hesham. "Condition Assessment and Analytical Modeling of Alkali-Silica Reaction (ASR) Affected Concrete Columns." Thesis, Université d'Ottawa / University of Ottawa, 2021. http://hdl.handle.net/10393/42680.

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Concrete has proven to be, by far, one of the most reliable materials for the construction of critical infrastructure. However, despite its structural capacity, concrete members are susceptible to damage mechanisms that may decrease its performance and durability throughout its service life. One such mechanism is alkali-silica reaction (ASR), which takes place when unstable siliceous phases present in coarse or fine aggregates react with the alkali hydroxides from the concrete pore solution, generating a secondary product (i.e., ASR gel); this product swells upon moisture uptake from the surro

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Stimpson, Curtis K. "The Composition and Morphology of Coal Ash Deposits Collected in an Oxy-Fuel, Pulverized Coal Reactor." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3225.

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Coal ash deposits were collected in a 160 kWth, down-fired oxy-coal reactor under staged and unstaged conditions for four different coals (PRB, Gatling, Illinois #6, and Mahoning). Concentration measurements of carbon, oxygen, sodium, magnesium, aluminum, silicon, phosphorus, sulfur, chlorine, potassium, calcium, titanium, chromium, manganese, iron, nickel, strontium, and barium were gathered from each deposit sample using scanning electron microscopy and energy dispersive spectroscopy (SEM-EDS). Backscattered electron micrographs for each deposit sample were analyzed to gather morphological d

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Nkongolo, Etienne Beya. "Passive treatment of acid mine drainage using South African coal fly ash in a column reactor." Thesis, Cape Peninsula University of Technology, 2020. http://hdl.handle.net/20.500.11838/3064.

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Thesis (MEng (Chemical Engineering))--Cape Peninsula University of Technology, 2020<br>Fly ash (FA) and acid mine drainage (AMD) are two undesirable materials generated from combustion of pulverized coal for energy and mining activity respectively. Both waste materials have serious, negative impacts on the environment. Fly ash storage leaches a variety of contaminants into surface and groundwater and AMD contains high amounts of toxic metals besides the already dominant 𝑆𝑂!"# concentrations. Many studies had investigated AMD treatment using FA and successfully removed significant amounts

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Ros, Bascuñana Carlos. "Diagnostic application of the polymerase chain reaction (PCR) in veterinary microbiology /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1997. http://epsilon.slu.se/avh/1997/91-576-5247-3.gif.

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Lesnicki, Krzysztof Jacek. "Nonlinear resonance methods for assessing ASR susceptibility during concrete prism testing (CPT)." Thesis, Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/41054.

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This research focuses on the characterization of damage accumulation in concrete specimens. Specifically, a nonlinear vibration technique is used to characterize the damage introduced by ongoing alkali-silica reactions (ASR). The nonlinear resonance testing consists of an analysis of the frequency response of concrete specimens subjected to impact loading. ASR introduces a third gel like phase, which can be expansive in the presence of moisture. The result of ASR is the formation of microcracks and debonding between aggregate and cement phases. Collectively, these changes act to increase the s

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Williams, Peter. "Evaluating the Impact of ASC 606 on the Preparation and Presentation of the Financial Statements and the Corresponding Market Reaction." Scholarship @ Claremont, 2019. https://scholarship.claremont.edu/cmc_theses/2039.

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This thesis examines the impact of the new revenue recognition standard, Accounting Standard Codification 606 (ASC 606), on the preparation and presentation of the financial statements. This thesis also inspects the impact of this change on the financial markets. This study begins with a qualitative examination of the impacts pertaining to ASC 606 through expert interviews and close examination of previously published reports. This paper later analyzes the financials of 10 specific companies and the effects attributed to ASC 606. And finally, this paper analyzes the effect of this change on th

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Porkert, Sebastian. "Physico-Chemical Processes during Reactive Paper Sizing with Alkenyl Succinic Anhydride (ASA)." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-219620.

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Sizing (hydrophobization) is one of the most important process steps within the added-value chain of about 1/3rd of the worldwide produced paper & board products. Even though sizing with so-called reactive sizing agents, such as alkenyl succinic anhydride (ASA) was implemented in the paper industry decades ago, there is no total clarity yet about the detailed chemical and physical mechanisms that lead to their performance. Previous research was carried out on the role of different factors influencing the sizing performance, such as bonding between ASA and cellulose, ASA hydrolysis, size revisi

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Zhu, Yufeng. "Assessing Condition on Alkali-Silica Reaction (ASR) Affected Recycled Concrete." Thesis, Université d'Ottawa / University of Ottawa, 2020. http://hdl.handle.net/10393/41191.

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Many highway and hydraulic structures in North America have been reported to be affected by alkali aggregate reaction (ASR). It is anticipated that most of these structures will be demolished as they approach the end of their service lives. Recycling demolished concrete as aggregates in new concrete is an option that not only reduces the amount of construction demolition waste (CDW) disposed in landfills but also lessens the consumption of non-renewable resources such as natural aggregates. However, the use of recycled concrete aggregate (RCA) in new concrete requires detailed research to make

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Bayer, Petr. "Použitelnost ložového popele z vitrifikovaného lignitového uhlí v kompozitních cementech." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2014. http://www.nusl.cz/ntk/nusl-217052.

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Předložená magisterská práce se zabývá možným použitím vitrifikovaného lignitového lóžového popele jako náhrada slinku v kompozitních cementech. Byly zkoumány vlivy přidaného vitrifikovaného lóžového popele, jeho jemnosti, alkalických roztoků a jejich koncentrací. Byly připraveny kompozitní cementy v souladu s normou DIN EN 197 – 1. V těchto cementech bylo nahrazeno 30 % slinku vitrifikovaným lóžovým popelem. Konkrétně byly připraveny kompozitní cementy s vitrifikovaným lóžovým popelem o jemnosti 5549 cm2/g a 8397 cm2/g. Dále byly přidány alkalické roztoky hydroxidů a síranů vždy o dvou různýc

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Thapa, Romit. "Uniaxial and Biaxial Restraint in Concrete Pavement Undergoing Alkali-Silica Reaction." Youngstown State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1533123602865294.

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Trottier, Cassandra. "Evaluation of Alkali-Silica Reaction (ASR)-Induced Damage Generation and Prolongation in Affected Recycle Concrete." Thesis, Université d'Ottawa / University of Ottawa, 2020. http://hdl.handle.net/10393/41093.

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Recycled concrete is among the rising eco-friendly construction materials which helps to reduce waste and the need for new natural resources. However, such concrete may present previous deterioration due to, for instance, alkali-silica reaction (ASR), which is an ongoing distress mechanism that may keep being developed in the recycled material. This work aims to evaluate the potential of further distress and crack development (i.e. initiation and propagation) of AAR-affected RCA concrete in recycled mixtures displaying distinct past damage degrees and reactive aggregate types. Therefore, concr

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Rathogwa, Ntungufhadzeni Maclaughlin. "Development and evaluation of a real-time polymerase chain reaction assay for equine encephalosis virus." Diss., University of Pretoria, 2012. http://hdl.handle.net/2263/29706.

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Equine encephalosis virus (EEV) is the cause of equine encephalosis. The disease is similar to mild forms of African horse sickness (AHS) and the two diseases are easily confused. Laboratory identification and serotyping of EEV is based on viral isolation in BHK-21 cells and a viral plaque inhibition neutralization test (Erasmus <i<et al., 1970). These procedures require long durations to confirm results and it was desirable that a rapid diagnostic assay was developed to distinguish EEV from African horse sickness virus (AHSV). A PCR test developed for AHSV (Quan et al., 2008) formed the basis

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Kissounko, Natalia. "Study of dynamics in a reaction catalyzed by ht- and ps-ADH cloning, purification and preliminary x-ray screening /." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 80 p, 2008. http://proquest.umi.com/pqdweb?did=1605142871&sid=6&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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Gockel, Sonja. "Wachstumsreaktionen einzeln eingemischter Vogelbeeren (Sorbus aucuparia L.) in Fichtenjungbeständen nach Freistellung." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-207606.

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Die vorliegende Arbeit konnte im Rahmen des vom Bundesministerium für Bildung und Forschung (BMBF) geförderten Verbundprojektes „Zukunftsorientierte Waldwirtschaft (1998-2003)“ erstellt werden. Dieses Vorhaben hat die bundesweiten Forderungen und Zielvorstellungen der Landesforstverwaltungen aufgegriffen, die nicht standortsgemäßen, naturfernen und instabilen Nadelbaumreinbestände umzubauen und den Anteil an Mischbeständen in den Forstbetrieben deutlich zu erhöhen. Neben ökonomischen Zielen sollte der Waldumbau vor allem auch ökologische Belange berücksichtigen. Dies wurde durch entsprechende

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Öberg, Christian. "Co-combustion of Industrial Biosludge and other Residual Streams in a Bubbling Fluidized Bed : Focusing on reduction of operating and technical problems by analyzing the ash transformation chemistry." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-122491.

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Today the use of resources in the industry are not complete to be considered as sustainable from the perspective of nutrient recovery. In the Swedish pulp and paper industry residual streams such as bark, fiber reject and sludge are returned for more sustainable use more frequently. Around 300 000-600 000 tons of sludge is generated every year from different cleaning processes in the pulp and paper industry. About 15 % of that sludge is so called biosludge that is a result from biological water treatment, where large amounts of phosphorus are used. After the cleaning process the total amount o

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42

Gao, Xiao Xiao. "Contribution to the requalification of alkali silica reaction (ASR) damaged structures : assessment of the ASR advancement in aggregates by alkali silica reaction." Thesis, Toulouse, INSA, 2010. http://www.theses.fr/2010ISAT0034/document.

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Afin de répondre aux questions des propriétaires de structures atteintes de réaction alcali-silice (RAS), ce travail se concentre sur une partie d'une méthodologie globale, proposée initialement par le LMDC et EDF, et dont le but est l'étude du comportement mécanique des constructions endommagées par la RAS. Pour atteindre cet objectif, l'avancement chimique de la RAS des granulats récupérés dans les structures affectées doit être évalué. Ainsi, ce travail est consacré à la quantification de la silice potentiellement réactive des granulats, par l'utilisation de deux approches : une approche in

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43

Ramasoota, Pongrama. "Subtyping of bacterial pathogens by polymerase chain reaction (PCR)-based techniques : studies on Mycobacterium spp. and Escherichia coli from humans and animals in Sweden and Thailand /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 2000. http://epsilon.slu.se/avh/2000/91-576-5946-X.pdf.

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44

Greskowiak, Janek Johannes. "Reactive transport processes in artificially recharged aquifers." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät II, 2006. http://dx.doi.org/10.18452/15582.

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In der vorliegenden Dissertation sollten die hydrogeochemischen Prozesse herausgearbeitet werden, die für die Wasserqualitätsänderung während eines ASR Experiments in Bolivar, Südaustralien und während der Versickerung in einem künstlichen Grundwasseranreicherungsbecken in Berlin von Bedeutung waren. Reaktive Stofftransportmodellierung des ASR Experiments in Bolivar, Südaustralien zeigte, dass die hydrochemischen Veränderungen in der direkten Umgebung des Injektionsbrunnens während der Speicherphase nur durch rapide Änderungen der Sauerstoff- und Nitrat reduzierenden Bakterienmasse erklärt we

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Gujral, Chirag Harsharan Singh. "Boronic-diol complexation as click reaction for bioconjugation purposes." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/boronicdiol-complexation-as-click-reaction-for-bioconjugation-purposes(a7072d58-2a4f-4d0f-bcab-6cd709bdac12).html.

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The research presented in this thesis focuses on the study of the reaction between boronic acids and diols and its evaluation as a possible "click" reaction, possibly applicable in bioconjugation and drug delivery. A key feature of this reaction is its reversibility at acidic pH, which could allow the release of a diol-containing drug from a bioconjugate in the acidic environment of late endosome/lysosome, possibly after undergoing receptor mediated endocytosis. Over the last two decades various studies have focused on the study of the conjugation of boronic acids to diols using Alizarin Red S

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Garcia, Jennifer N. "A Geochemical Analysis: Application of a Chelating Agent on Potential ASR Reactive Aggregates." Digital Archive @ GSU, 2011. http://digitalarchive.gsu.edu/geosciences_theses/39.

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Alkali Silica Reaction (ASR) is a deleterious, expansive reaction in concrete. Several ASTM methods test potential aggregates for ASR risk. One method uses NaOH digestion, followed by spectroscopic methods, to estimate the amount of reactive silica present in an aggregate. NaOH, however, can digest both crystalline (i.e. quartz) and non-crystalline (e.g. opal), or poorly crystalline silica, potentially yielding falsely high estimates of reactive silica. Studies in soil and plant sciences have used Tiron, an alkaline chelating agent (C6H4S2O8Na2), as a method of digesting opaline silica for spe

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Beckmann, Michael, Martin Pohl, Daniel Bernhardt, and Kathrin Gebauer. "Criteria for solid recovered fuels as a substitute for fossil fuels – a review." Sage, 2012. https://publish.fid-move.qucosa.de/id/qucosa%3A38445.

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The waste treatment, particularly the thermal treatment of waste has changed fundamentally in the last 20 years, i.e. from facilities solely dedicated to the thermal treatment of waste to facilities, which in addition to that ensure the safe plant operation and fulfill very ambitious criteria regarding emission reduction, resource recovery and energy efficiency as well. Therefore this contributes to the economic use of raw materials and due to the energy recovered from waste also to the energy provision. The development described had the consequence that waste and solid recovered fuels (SRF) h

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VENKATA, PADMA PRIYA. "Computational Modeling of Heat and Mass Transfer in Planar SOFC: Effects of Volatile Species/Oxidant Mass Flow Rate and Electrochemical Reaction Rate." University of Cincinnati / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1205169104.

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Ambruz, Pavel. "Vývoj betonů s vysokým obsahem popílku a ověření jeho trvanlivosti v různých prostředích." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226741.

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This thesis contains two main parts: theoretical and experimental. The theoretical part deals with summarization knowledge of high-volume fly ash (HVFA) concretes. Among others, there are mentioned processes of producing of fly ash, characteristic features and resistance to aggressive environments of HVFA concretes. The theoretical part ends with a suitable example of practical application. In the practical part were tested properties of nine different mixtures containing 40%, 50% and 60% replacement by weight of the cement by fly ash. They were compared with the reference mixtures without fly

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Smeltz, Jonathan Brett. "Dedolomitization and Alkali-Silica Reactions in Ohio-Sourced Dolostone Aggregates." Bowling Green State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1522982074568612.

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