Relevant bibliographies by topics / Katalyytti

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  1. Dissertations / Theses
  2. Books

Academic literature on the topic 'Katalyytti'

Author: Grafiati
Published: 4 June 2021
Last updated: 18 February 2022

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Dissertations / Theses on the topic "Katalyytti"

1

Romar, H. (Henrik). "Biomass gasification and catalytic conversion of synthesis gas:characterisation of cobalt catalysts for Fischer-Tropsch synthesis." Doctoral thesis, Oulun yliopisto, 2015. http://urn.fi/urn:isbn:9789526208015.

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Abstract Biomass gasification as a thermochemical treatment method is typically used for heat and power production. Instead of burning the producer gas, it can be converted to added-value products, i.e to fuels and chemicals. One such conversion is the catalytic Fischer-Tropsch synthesis (FTS) which converts synthesis gas to a chain of aliphatic hydrocarbons (FT diesel) as studied in this thesis. This requires, however, proper cleaning steps of producer gas, such as the removal of tar compounds and other impurities. These cleaning steps are not considered in this thesis. The first goal of the
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2

Darif, B. (Bouchra). "Synthesis and characterization of catalysts used for the catalytic oxidation of sulfur-containing volatile organic compounds:focus on sulfur-induced deactivation." Doctoral thesis, Oulun yliopisto, 2016. http://urn.fi/urn:isbn:9789526214221.

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Abstract The work in this thesis concentrates on finding more active and durable catalysts for the demanding environmental application of the oxidation of sulfur-containing volatile organic compounds (S-VOCs). This application is challenging due to the high purification levels required and the catalyst deactivating nature of sulfur. In this thesis, dimethyldisulfide (DMDS) was used as the model molecule to represent S-VOCs since it is often present in odorous emissions and it is more difficult to treat than most of the other S-VOCs. It was found that the addition of a very small amount of Pt (
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3

Rautio, A. R. (Anne-Riikka). "On the stability of carbon nanotube and titania nanowire based catalyst materials:from synthesis to applications." Doctoral thesis, Oulun yliopisto, 2016. http://urn.fi/urn:isbn:9789526211060.

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Abstract Degradation of the support and sintering of catalyst nanoparticles inherently leads to a loss of functionality of catalyst materials in converters and sensors. Malfunction in such devices may lead to serious economic and environmental damage. The quest for novel and sustainable catalyst materials with better durability is thus ongoing. In this thesis, one-dimensional nanomaterials such as carbon nanotubes and titanium dioxide nanowires are studied and compared to their conventional zero-dimensional counterparts in regard to their structural and functional stability. With the combinati
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4

Lin, J. F. (Jhih-Fong). "Multi-dimensional carbonaceous composites for electrode applications." Doctoral thesis, Oulun yliopisto, 2015. http://urn.fi/urn:isbn:9789526208459.

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Abstract The objective of this thesis is to demonstrate multi-dimensional carbon nanotube (CNT) structures in combination with various active materials in order to evaluate their performance in electrode applications such as cold emitters, electric double-layer capacitors (EDLC), and electrochemical sensor/catalyst devices. As the host materials for other active materials, the construction of multi-dimensional CNT nanostructures in this thesis is achieved by two different approaches. In the first, direct growth of 3-dimensional carbon nanostructures by catalytic chemical deposition to produce
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5

Seelam, P. K. (Prem Kumar). "Hydrogen production by steam reforming of bio-alcohols:the use of conventional and membrane-assisted catalytic reactors." Doctoral thesis, Oulun yliopisto, 2013. http://urn.fi/urn:isbn:9789526202778.

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Abstract The energy consumption around the globe is on the rise due to the exponential population growth and urbanization. There is a need for alternative and non-conventional energy sources, which are CO2-neutral, and a need to produce less or no environmental pollutants and to have high energy efficiency. One of the alternative approaches is hydrogen economy with the fuel cell (FC) technology which is forecasted to lead to a sustainable society. Hydrogen (H2) is recognized as a potential fuel and clean energy carrier being at the same time a carbon-free element. Moreover, H2 is utilized in m
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6

Väliheikki, A. (Ari). "Resistance of catalytic materials towards chemical impurities:the effect of sulphur and biomaterial-based compounds on the performance of DOC and SCR catalysts." Doctoral thesis, Oulun yliopisto, 2016. http://urn.fi/urn:isbn:9789526212845.

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Abstract Exhaust gas emissions, e.g. nitrogen oxides (NOx), hydrocarbons (HCs) and carbon monoxide (CO), are harmful to human health and the environment. Catalysis is an efficient method to decrease these emissions. Unfortunately, the fuels and lubricant oils may contain chemical impurities that are also present in exhaust gases. Thus, catalytic materials with high activity and chemical resistance towards impurities are needed in the abatement of exhaust gas emission. In this thesis, the aim was to gain new knowledge about the effects of chemical impurities on the behaviour and activity of the
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7

Hajimammadov, R. (Rashad). "Plasmonic, electrical and catalytic properties of one-dimensional copper nanowires:effect of native oxides." Doctoral thesis, Oulun yliopisto, 2018. http://urn.fi/urn:isbn:9789526218878.

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Abstract Recent advances in materials synthesis resulted in a rediscovery of the low cost copper in its one and two-dimensional forms and project newer applications of this metal in fields not considered before. In this thesis, one-dimensional copper, i.e. nanowires are synthesized by a hydrothermal route and explored for their chemical, electrical, catalytic and plasmonic properties with highlighted advantages, benefited from their size and shape compared to thin film and bulk copper. Characterization of copper nanowires and their native oxides were performed using a number of analytical tech
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8

Halonen, N. (Niina). "Synthesis and applications of macroscopic well-aligned multi-walled carbon nanotube films." Doctoral thesis, Oulun yliopisto, 2013. http://urn.fi/urn:isbn:9789526202105.

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Abstract The main objectives of this thesis are to synthesize macroscopic well-aligned multi-walled carbon nanotube films and, based on their electrical conductivity, porosity and structural uniformity, highlight potential applications for further development. In this thesis, catalytic chemical vapour deposition from ferrocene-xylene precursors is optimized to grow high quality films of long, aligned multi-walled carbon nanotubes on lithographically patterned templates in high (~800ºC) temperatures. The impacts of reaction time, temperature and precursor concentration on MWCNT film quality (fi
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Books on the topic "Katalyytti"

1

Simell, Pekka. Tervapitoisen kaasutuskaasun puhdistus katalyyttien avulla. Valtion teknillinen tutkimuskeskus, 1989.

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