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Teses / dissertações sobre o tema "Catalytic pyrolysis"

Autor: Grafiati

Publicado: 4 de junho de 2021

Última modificação: 26 de julho de 2025

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1

Ofoma, Ifedinma. "Catalytic Pyrolysis of Polyolefins." Thesis, Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/10439.

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Due to the migration of scientists towards green chemistry, landfilling and incineration will no longer be acceptable options for plastics waste disposal in the future. Consequently new methods for recycling plastics and plastic products such as carpets are being researched. This study serves as a preliminary effort to study the catalytic feedstock recycling of polyolefins, specifically PP and PE, as source for gasoline range fuels, as well as an alternative for plastic waste disposal. Several studies have been conducted on the pyrolysis of waste polyolefins using commercial cracking catalys

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2

Nicolson, Iain Sinclair. "Catalytic pyrolysis of nitro aromatic compounds." Thesis, University of Edinburgh, 2003. http://hdl.handle.net/1842/15526.

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The work contained in this thesis was intended to study the rearrangement of <i>o</i>-nitrotoluene to anthranil which has previously been shown to occur under a variety of conditions. Flash Vacuum Pyrolysis (FVP) of nitrotoluene over zeolite 13X was carried out. <i>o</i>-Nitrotoluene was found to give conversion to toluene in 5.5% yield with recovery of starting material (12%). FVP of <i>m</i>-nitrotoluene gave recovery of toluene in 8% yield and starting material (7%). FVP of <i>p</i>-nitrotoluene gave only a trace of toluene with mainly recovery of unreacted starting material (12%). FVP of 1

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3

Scriba, Manfred R. "Silicon nanoparticle sysnthesis through thermal catalytic pyrolysis." Master's thesis, University of Cape Town, 2006. http://hdl.handle.net/11427/6550.

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Includes bibliographical references.<br>Nanoparticles are considered as fundamental building blocks of nanotechnology and, silicon nanoparticles in particular, will form the basis of applications in single electron transistors, floating gate memory devices, solid state lighting, chemical sensors and flexible electronics, including solar cells and luminescent materials, printed on paper. A remaining key challenge however in the development of applications is the reproducible and reliable production of nanomaterial in sufficient quantities. Historically nanoparticles have been manufactured by to

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4

Abdellaoui, Hamza. "Catalytic Pyrolysis of Olive Mill Wastewater Sludge." DigitalCommons@USU, 2015. https://digitalcommons.usu.edu/etd/4468.

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Olive mill wastewater sludge (OMWS) is the solid residue that remains in the evaporation ponds after evaporation of the majority of water in the olive mill wastewater (OMW). OMWS is a major environmental pollutant in the olive oil producing regions. Approximately 41.16 wt. % of the OMWS was soluble in hexanes (HSF). The fatty acids in this fraction consist mainly of oleic and palmitic acid. Catalytic pyrolysis of the OMWS over red mud and HZSM-5 has been demonstrated to be an effective technology for converting this waste material into fuel. Red mud-catalyzed pyrolysis gave higher organics yie

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5

Jahromi, Hossein. "Hydrodeoxygenation of Pinyon-Juniper Catalytic Pyrolysis Oil." DigitalCommons@USU, 2019. https://digitalcommons.usu.edu/etd/7422.

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Catalytic hydrodeoxygenation (HDO), is an effective process to convert oxygenated compounds to hydrocarbons. This process is widely used for improving the negative properties of biomass-derived pyrolysis oils (bio-oils) such as high acidity, poor stability, and low heating value. During this process oxygen is removed from the bio-oil in the form of water, thus the liquid product of HDO process consists of aqueous phase and hydrocarbon phase that can be easily separated. Synthesis of efficient HDO catalyst has been a major challenge in the field of bio-oil upgrading. Red mud, which is an alkali

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6

Wauts, Johann André. "Catalytic microwave pyrolysis to produce upgraded bio-oil." Diss., University of Pretoria, 2017. http://hdl.handle.net/2263/61344.

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To assess the performance and future possibilities of catalytic microwave pyrolysis, laboratory-scale experiments were conducted on a widely available biomass feedstock, Eucalyptus grandis. Non-catalysed microwave pyrolysis was conducted under varying conditions to determine important factors of the microwave pyrolysis process and to conduct a basic performance evaluation. Future possibilities of microwave pyrolysis were determined by comparison to available technologies. Calcined Mg-Al LDH clay (layered double oxide or LDO) was used as catalyst to improve the quality of the pyrolysis process

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7

Ochonogor, Alfred Ezinna. "Thermal and catalytic pyrolysis of waste brominated plastics." Thesis, University of Leeds, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.574522.

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The pyrolysis of brominated high impact polystyrene, brominated acrylonitrile butadiene styrene, television housing, integrated circuit tray and personal computer front panel plastics were performed respectively in a two stage reactor at a degradation temperature of 570 QC and heating rate of 20 QC. Four catalysts were used during the pyrolysis; waste fluid catalytic cracking catalyst (FCC), a natural zeolite catalyst, two Y -zeolite catalysts (CB V 400 and CBV720) in order to increase the value of the pyrolysis products. The pyrolysis products were analysed by various analytical techniques. T

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8

Kidane, Yonas Afewerki. "Catalytic Fast Pyrolysis of Whole Field Pennycress Biomass." DigitalCommons@USU, 2015. https://digitalcommons.usu.edu/etd/4464.

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Reports indicate that the worldwide energy consumption and fossil fuel energy production level will have an opposite trend in the coming two decades. The former will continue to increase while the later will decrease. Therefore, additional sources of energy need to be developed. Field pennycress (Thlaspi, arvense L.) has been found to be an ideal source of energy because it has prolific yield and has no value as food. We demonstrated conventional and catalytic fast pyrolysis of whole pennycress biomass in a fluidized bed reactor. Characterization studies on field pennycress showed that the bio

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9

Yathavan, Bhuvanesh Kumar. "Conventional and Catalytic Pyrolysis of Pinyon Juniper Biomass." DigitalCommons@USU, 2013. https://digitalcommons.usu.edu/etd/2053.

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Pinyon and juniper are invasive woody species which has occupied more than 47 million acres of land in Western United States. Pinyon juniper woodlands domination decreases the herbaceous vegetation, increase bare lands which in turn increases soil erosion and nutrition loss. Thus, The US Bureau of Land Management (BLM) has focused on harvesting these woody species to make room for herbaceous vegetation. The major application of harvested pinyon-juniper (PJ) is low value firewood. Thus, there is a need to develop new high value products from this woody biomass to reduce the cost of harvesting.

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10

Goteti, Anil Chaitanya. "Experimental investigation and systems modeling of fractional catalytic pyrolysis of pine." Thesis, Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/42844.

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The fractional catalytic pyrolysis of pine was studied both experimentally and through models. A preliminary stage economic analysis was conducted for a wood chip pyrolysis facility operating at a feed rate of 2000 wet ton/day for producing bio-oil. In the experimental study, multiple grams of bio oil were produced in a single run to facilitate the more extensive characterization of the oil produced from pyrolysis of biomass impregnated with different catalysts. Two reactors configurations, a screw extruder and a tubular pyrolysis reactor, were explored to perform fractional catalytic pyrolys

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11

Atadana, Frederick Williams. "Catalytic Pyrolysis of Cellulose, Hemicellulose and Lignin Model Compounds." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/31251.

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<p>The effect of HZSM-5 catalyst and NaOH pretreatment on the product distribution and bio oil properties from pyrolysis of cellulose, hemicellulose and lignin model compounds was investigated at 450 Â°C. NaOH pretreated and untreated cellulose was pyrolyzed on sand and the HZSM-5 catalysts; VPISU001 HZSM-5, BASF HZSM-5, and Sud-Chemie HZSM-5. The pyrolysis of cellulose on BASF and Sud-Chemie HZSM-5 catalysts increased the yields of the organic liquid fraction, total liquid and char while decreasing the gas yields. However the catalyst decreased the organic and char yields while increasing the

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12

Salter, Elizabeth H. "Catalytic pyrolysis of biomass for improved liquid fuel quality." Thesis, Aston University, 2001. http://publications.aston.ac.uk/9633/.

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13

Pattiya, Adisak. "Catalytic pyrolysis of agricultural residues for bio-oil production." Thesis, Aston University, 2007. http://publications.aston.ac.uk/9804/.

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Agricultural residues from Thailand, namely stalk and rhizome of cassava plants, were employed as raw materials for bio-oil production via fast pyrolysis technology. There were two main objectives of this project. The first one was to determine the optimum pyrolysis temperature for maximising the organics yield and to investigate the properties of the bio-oils produced. To achieve this objective, pyrolysis experiments were conducted using a bench-scale (150 g/h) reactor system, followed by bio-oil analysis. It was found that the reactor bed temperature that could give the highest organics yiel

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14

Wikberg, Elena. "Catalytic Upgrading of Fast Pyrolysis Bio-oil Using Zeolites." Thesis, KTH, Kraft- och värmeteknologi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-255683.

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Fast pyrolysis bio-oil is considered as a possible source for production of liquid bio-fuels and bio-chemicals enabling the necessary transition to a renewable energy system. In this Master’s thesis work the upgrading of fast pyrolysis bio-oils with Fluid Catalytic Cracking (FCC) conversion process at industrially relevant conditions is studied using Fluid Catalytic Cracking Micro Activity Test (FCC MAT) unit at RISE ETC in Piteå, Sweden. The study is focused on evaluating the process in terms of production of value-added products including petrochemical materials, such as propylene and benzen

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15

Akude, Angela M. "Production of Phenol-formaldehyde Adhesives from Catalytic Pyrolysis Oil." DigitalCommons@USU, 2017. https://digitalcommons.usu.edu/etd/5612.

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Phenol-formaldehyde adhesives are important adhesives known to have superior water resistance capacity and high mechanical strength when utilized in wood-based applications. Due to unsustainability and environmental issues associated with the use of fossil fuels, there is an urgent need to look for alternative raw materials, which are renewable in nature. Pinyon-juniper biomass has been found to be a suitable replacement for petroleum-based phenol because it is renewable, abundant, and readily available. In this thesis, bio-oil produced from the pyrolysis of pinyon-juniper biomass using red mu

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16

Wang, Shule. "Catalytic fast pyrolysis of softwood under N2 and H2 atmosphere." Thesis, KTH, Energi- och ugnsteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-216995.

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Bio-oil generated from biomass is becoming one of the most promising alternatives as potential energy sources to replace fossil fuels in the transportation sector. Fast pyrolysis of biomass is one of the most economically feasible ways to produce bio-oil according to recent research on thermochemical conversion of biomass. Upgrading of oils derived from to hydrocarbon fuels requires oxygen removal and molecular weight reduction. Catalytic cracking and hydrotreating are two efficient processes to upgrade bio-oil. Hydrotreating requires that hydrogen is added in the process to increase the H/C

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17

Kantarelis, Efthymios. "Catalytic Steam Pyrolysis of Biomass for Production of Liquid Feedstock." Doctoral thesis, KTH, Energi- och ugnsteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-142412.

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The current societal needs for fuels and chemical commodities strongly depend on fossil resources. This dependence can lead to economic instabilities, political problems and insecurity of supplies. Moreover, global warming, which is associated with the massive use of fossil resources, is a dramatic “collateral damage” that endangers the future of the planet. Biomass is the main renewable source available today that can, produce various liquid, gaseous and solid products. Due to their lignocellulosic origin are considered CO2 neutral and thus can generate CO2 credits. Biomass processing can mee

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18

Abu, Bakar Muhammad. "Catalytic intermediate pyrolysis of Brunei rice husk for bio-oil production." Thesis, Aston University, 2013. http://publications.aston.ac.uk/20899/.

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Rice husks from Brunei were subjected via intermediate pyrolysis for bio-oil production. Two main objectives were set out for this study. The application of intermediate pyrolysis on Brunei rice husk for the production of bio-oil is the main objective of this experiment. Characterisation of the rice husks was inclusive as a pre-requisite step to assess the suitability as feedstock for production of liquid fuels. Following on from the characterisation results, a temperature of 450°C was established as the optimum temperature for the production of bio-oil. A homogenous bio-oil was obtained from

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19

Shi, Kaiqi. "Microwave-enhanced pyrolysis of biomass coupled with catalytic reforming for hydrogen production." Thesis, University of Nottingham, 2015. http://eprints.nottingham.ac.uk/30406/.

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Pyrolysis of biomass is a promising and sustainable approach to produce value-added chemicals and biofuels. In order to achieve a high yield of hydrogen-rich syngas from pyrolysis of biomass, the microwave-enhanced pyrolysis of biomass coupled with catalytic reforming was studied systematically in this research. Firstly, microwave-enhanced pyrolysis of biomass was carried out and compared with conventional pyrolysis under the same processing conditions. Characterisations of biomass, pyrolytic char, bio-oil and biogas were conducted to investigate the differences between microwave-enhanced and

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20

Gu, Xiangyu. "Molten-salt Catalytic Pyrolysis (MSCP): A Single-pot Process for Fuels from Biomass." Digital WPI, 2015. https://digitalcommons.wpi.edu/etd-theses/504.

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A novel process for single-pot conversion of biomass to biofuels was developed called the molten salt catalytic pyrolysis (MSCP) method. The proposed single-pot MSCP process proved to be an inherently more efficient and cost-effective methodology for converting lignocellulosic biomass. In this study, several parameters that affect yield of bio-oil were investigated including carrier gas flow rate; pyrolysis temperature; feed particle size; varying types of molten salt and catalysts. Use of molten salt as the reaction medium offered higher liquid yield and experiments containing ZnCl2 showed hi

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21

Mahmood, Asad. "Thermochemical conversion of Brewers Spent Grain combined with catalytic reforming of pyrolysis vapours." Thesis, Aston University, 2015. http://publications.aston.ac.uk/26198/.

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The brewing process is an energy intensive process that uses large quantities of heat and electricity. To produce this energy requires a high, mainly fossil fuel consumption and the cost of this is increasing each year due to rising fuel costs. One of the main by-products from the brewing process is Brewers Spent Grain (BSG), an organic residue with very high moisture content. It is widely available each year and is often given away as cattle feed or disposed of to landfill as waste. Currently these methods of disposal are also costly to the brewing process. The focus of this work was to inves

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22

Nugrahany, Febryana. "Modelling of Biomass Pyrolysis with Ex-situ Catalytic Upgrading for Bio-crude Production." Thesis, KTH, Materialvetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-231489.

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This study presents a techno-economic assessment of slow pyrolysis of pine sawdust continued by ex-situ catalytic upgrading. The overall process consists of six sections: feed drying, pyrolysis, vapor filtration, ex-situ catalytic upgrading, vapor quenching, and combustion of permanent gas. In the process simulation, biomass is objected to slow pyrolysis at 450ºC in an electrically-heated screw reactor and pyrolysis vapors is upgraded in fixed catalytic bed reactor at 425 ºC (using HZSM-5). The model is then used to investigate effects of feed moisture variation and type of heating source in p

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23

Samo, Sandra. "Katalytisk pyrolys av förbehandlad biomassa." Thesis, KTH, Skolan för kemivetenskap (CHE), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-220702.

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Biomassa innehåller oorganiska ämnen som bl.a. alkalimetaller och alkaliska jordartsmetaller, vilket bidrar till ett minskat utbyte av pyrolysolja och ökar istället utbytet av gaser och lågvärdiga produkter. Detta sker p.g.a. att oorganiska ämnen agerar som krackningkatalysatorer. [1] Pyrolysolja har även en hög syrehalt vilket t.ex. gör den oblandbar med fossil olja. Genom att använda lakning som förbehandlingsmetod kan biomassans innehåll av oorganiska ämnen minska och pyrolysoljans sammansättning ändras. Detta sker genom bl.a. jonbytesreaktioner som uppstår mellan joner i lakningsmedlet och

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24

Carriel, Schmitt Caroline [Verfasser]. "Catalytic upgrading of fast pyrolysis bio-oils applying nickel-based catalysts / Caroline Carriel Schmitt." Karlsruhe : KIT-Bibliothek, 2021. http://d-nb.info/1225401259/34.

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25

Mante, Nii Ofei Daku. "Fractional Catalytic Pyrolysis Technology for the Production of Upgraded Bio-oil using FCC Catalyst." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/40436.

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Catalytic pyrolysis technology is one of the thermochemical platforms used to produce high quality bio-oil and chemicals from biomass feedstocks. In the catalytic pyrolysis process, the biomass is rapidly heated under inert atmosphere in the presence of an acid catalyst or zeolite to promote deoxygenation and cracking of the primary vapors into hydrocarbons and small oxygenates. This dissertation examines the utilization of conventional fluid catalytic cracking (FCC) catalyst in the fractional catalytic pyrolysis of hybrid poplar wood. The influence of Y-zeolite content, steam treatment, addit

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26

H, Moud Pouya. "Catalytic Conversion of Undesired Organic Compounds to Syngas in Biomass Gasification and Pyrolysis Applications." Doctoral thesis, KTH, Kemiteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-213368.

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Reliable energy supply is a major concern and crucial for development of the global society. To address the dependency on fossil fuel and the negative effects of this reliance on climate, there is a need for a transition to cleaner sources. An attractive solution for replacing fossil-based products is renewable substitutes produced from biomass. Gasification and pyrolysis are two promising thermochemical conversion technologies, facing challenges before large-scale commercialization becomes viable. In case of biomass gasification, tar is often and undesired by-product. An attractive option to

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Mohabeer, Chikirsha Chetna Devi. "Bio-oil production by pyrolysis of biomass coupled with a catalytic de-oxygenation treatment." Thesis, Normandie, 2018. http://www.theses.fr/2018NORMIR22/document.

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L’épuisement des sources d’énergie fossile et les conséquences nocives des gaz à effet de serre sur l’environnement ont accru la nécessité de l’utilisation des énergies renouvelables. Parmi les différentes sources, la biomasse possède un potentiel considérable. Ce projet de recherche vise à étudier la pyrolyse des anas de lin et du bois de hêtre, des biomasses qui se retrouvent communément dans la région Normandie, afin de produire et d’améliorer une bio-huile capable d’être utilisée comme bio-carburant dans les moteurs à combustion. L’objet de cette thèse est donc de fournir une caractérisati

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28

Smith, Phillip R. "Generation of Biomarkers from Anthrax Spores by Catalysis and Analytical Pyrolysis." Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd1005.pdf.

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Mohammed, Isah Yakub. "Pyrolysis of Napier grass to bio-oil and catalytic upgrading to high grade bio-fuel." Thesis, University of Nottingham, 2017. http://eprints.nottingham.ac.uk/39572/.

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Biomass is one of the renewable energy resources that has carbon in its building blocks that can be processed into liquid fuel. Napier grass biomass is a herbaceous lignocellulosic material with potentials of high biomass yield. Utilization of Napier grass for bio-oil production via pyrolysis is very limited. Bio-oil generally has poor physicochemical properties such as low pH value, high water content, poor chemical and thermal stabilities which makes it unsuitable for direct use as fuel and therefore requires further processing. Upgrading of bio-oil to liquid fuel is still at early stage of

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Scriba, Manfred R. "Synthesis and characterisation of doped silicon nanoparticles by hot wire thermal catalytic and spark pyrolysis." Doctoral thesis, University of Cape Town, 2010. http://hdl.handle.net/11427/11740.

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Includes abstract.<br>Includes bibliographical references (leaves 94-109).<br>Doped silicon nanoparticles with clean surfaces and which are suitable forelectronic applications, have successfully been produced. The doped silicon nanoparticles produced in this work will find application in the emerging field of flexible electronics. Two bottom-up production processes were utilised: hot wire thermal catalytic pyrolysis and spark pyrolysis. The latter is a new process,developed as part of this research for silicon nanoparticle synthesis. In each method silicon nanoparticles were synthesised using

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31

Gholizadeh, Mortaza. "Upgrading of pyrolysis bio-oil through hydrodeoxygenation and cracking in a continuous packed-bed catalytic reactor." Thesis, Curtin University, 2015. http://hdl.handle.net/20.500.11937/1761.

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Biomass is the only renewable resource that can be used to produce liquid fuels. The pyrolysis of biomass produces a crude bio-oil liquid. This study investigated the catalytic hydrotreatment of bio-oil to produce advanced liquid biofuels. The study focused on the understanding of reaction mechanisms for the formation of light fuel species and solid coke. The results will be useful for the development of low-emission biofuel technologies using non-food lignocellulosic biomass resources.

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Aydemir, Bugce. "Synthesis Of Mesoporous Catalysts And Their Performance In Pyrolysis Of Polyethylene." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612830/index.pdf.

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Plastic materials are widely used throughout the world due to their low prices and easy processing methods. A serious problem of environmental pollution is brought with the widespread use of these materials due to their non-biodegradabilty. For this reason, plastic materials are degraded into lower molecular weight liquid and gaseous products which are potential raw materials and fuels for petrochemical industry. The use of catalysts enhances the formation of more valuable hydrocarbons at lower reaction temperatures and residence times. In this study, aluminum containing MCM-41 and tungstoph

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Obali, Zeynep. "Synthesis Of Aluminum Incorporated Mesoporous Catalysts For Pyrolysis Of Polypropylene." Phd thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/3/12611772/index.pdf.

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The total amount of plastic wastes produced by our society has been growing rapidly. The low biodegradability of these wastes creates a serious environmental problem that is directing the governments and environmental agencies to take serious measures to solve the problem of the plastic wastes. Landfilling or incineration of these wastes are not the right solutions, because the former has the danger of leaching and soil impregnation of its degradation products and the latter produce air pollution problems due to the possible emissions of toxic and acid gases. An alternative approach to the sol

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Conti, Roberto <1986&gt. "Analytical Pyrolysis and Microextraction Methods to Characterize Oil and Biochar from Thermal and Catalytic Cracking of Biomass." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amsdottorato.unibo.it/7320/1/Conti_Roberto_Tesi.pdf.

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In this dissertation thermal and catalytic pyrolysis of protein-rich biomass was investigated. The study was focused on the liquid and solid products. This thesis was aimed to gather chemical information on the thermal behavior of proteinaceous substrates in the presence of zeolite and compare with lignocellulosic biomass. Furthermore, the thesis was focused on the development of reliable analytical methods by means of Py-GC-MS in order to predicting bio-oil composition and to investigating biochar structure and its correlation with thermal stability. In addition a sampling procedure for the d

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Conti, Roberto <1986&gt. "Analytical Pyrolysis and Microextraction Methods to Characterize Oil and Biochar from Thermal and Catalytic Cracking of Biomass." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amsdottorato.unibo.it/7320/.

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In this dissertation thermal and catalytic pyrolysis of protein-rich biomass was investigated. The study was focused on the liquid and solid products. This thesis was aimed to gather chemical information on the thermal behavior of proteinaceous substrates in the presence of zeolite and compare with lignocellulosic biomass. Furthermore, the thesis was focused on the development of reliable analytical methods by means of Py-GC-MS in order to predicting bio-oil composition and to investigating biochar structure and its correlation with thermal stability. In addition a sampling procedure for the d

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Hörnell, Christina. "Thermochemical and Catalytic Upgrading in a Fuel Context : Peat, Biomass and Alkenes." Doctoral thesis, KTH, Chemical Engineering and Technology, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3164.

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Halvarsson, Alfred. "Katalytisk omvandling av pyrolysgas i WoodRoll-processen för ökad processtillförlitlighet." Thesis, KTH, Skolan för kemivetenskap (CHE), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-172412.

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This project was a cooperation between the division of Chemical Technology at KTH, Cortus Energy and Haldor Topsoe A/S. The goal was to build up a totally new setup for converting and deoxygenate pyrolysis bio-oil, in order to increase the performance of Cortus Energy’s WoodRoll process. Therefore an iron based catalyst from Haldor Topsoe was used. The building up of the new setup with all reactors and the control panel was a complicated and time-consuming work. This led to an only short time slot for performing experiments, which means that more work needs to be done to get more valuable resu

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Jafri, Yawer. "Entrained-Flow Gasification of Black Liquor and Pyrolysis Oil : Experimental and Equilibrium Modelling Studies of Catalytic Co-gasification." Licentiate thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-60342.

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The last couple of decades have seen entrained-flow gasification of black liquor (BL) undergo an incremental process of technical development as an alternative to combustion in a recovery boiler. The ability of the technology to combine chemical recovery with the production of clean syngas renders it a promising candidate for the transformation of chemical pulp mills into integrated forest biorefineries. However, techno-economic assessments have shown that blending BL with the more easily transportable pyrolysis oil (PO) can not only increase the system efficiency for methanol production but r

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Duman, Isa. "Coke characterization on HZSM-5, Fe/ZSM-5, Ni/ZSM-5, and Fe-Ni/ZSM-5 from Catalytic Fast Pyrolysis of Biomass." Thesis, KTH, Skolan för kemi, bioteknologi och hälsa (CBH), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-226910.

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The combustion of fossil fuels has for a long time been a problem from an environmental and sustainability point of view, especially when it comes to the emissions of atmospheric carbon dioxide. The environmental concern has for instance shifted the attention towards finding new sustainable alternatives for producing chemicals and fuels, as a substitute to today’s dependence on fossil based crude oil. Catalytic Fast Pyrolysis of biomass is an excellent way to produce valuable chemicals and fuels using renewable resources. However, the process has some drawbacks, for example rapid deactivation

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Scholze, Britta. "Long-term stability, catalytic upgrading and application of pyrolysis oils improving the properties of a potential substitute for fossil fuels /." [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=967136490.

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Erhard, Felix Maria Maximilian. "Synthesis and catalytic applications of ruthenium- and iron-based nanoparticles from the pyrolysis of metal-containing homopolymers and block copolymers." Thesis, University of Bristol, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.658315.

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This Thesis is concerned with the synthesis of new Fe- and Rucontaining homopolymers and block copolymers and their applications as precursors for the fabrication of catalytically active nanoparticles upon pyrolysis (NPs). The strained sila[l]ferrocenophane (T]-CSH4) Fe(T]-CsH4)SiMeRc has been synthesised. Two different routes for its synthesis Were employed and compared. The compound was polymerised via thermal ringopening polymerisation (ROP), which afforded insoluble polymeric material. Photo controlled ROP. was used to afford narrowly dispersed, high molecular . weight (Mn between 10,000 a

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Gulshan, Samina. "Fast Pyrolysis of Biomass in a Fluidized Bed for Production of Bio-oil and Upgradation by Ex-situ Catalytic Bed." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-254895.

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Production of bio-oil from biomass is now becoming best substitute of fossil fuels in the transportation sector. Pyrolysis is one of the most promising route to produce bio-oil from biomass. However, bio-oil needs to be upgraded due to presence of high percentage of oxygenated compounds. Catalytic fast pyrolysis is a very efficient way to produce and upgrade the bio-oil either it is in-situ or Ex-situ arrangement. This study presents the experimental investigation of fast pyrolysis of lignocellulosic biomass by ex-situ catalytic upgradation. The whole process consists of four parts: biomass

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Espindola, Juliana da Silveira. "Desenvolvimento de catalisadores a base de HZSM-5 modificada por metais para o processo de pirólise rápida." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2014. http://hdl.handle.net/10183/105024.

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A pirólise rápida é uma tecnologia promissora para a conversão de biomassa. O principal produto desse processo é o bio-óleo, um líquido com elevada densidade energética, com potencialidades para a aplicação na produção de combustíveis e compostos renováveis. No entanto, existem ainda algumas barreiras para a sua utilização direta e um pós-processamento pode ser necessário. O uso de catalisadores no pós-processamento de bio-óleo, ou durante o processo de pirólise rápida, configura-se como alternativa para a produção direta de combustíveis e de produtos químicos com valor agregado, pois o proces

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Ehsan, Abbasi Atibeh. "A Study On The Catalytic Pyrolysis And Combustion Characteristics Of Turkish Lignite And Co-processing Effects With Biomass Under Various Ambient Conditions." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614512/index.pdf.

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In this study the catalytic pyrolysis and combustion characteristics of Turkish coal samples in O2/N2 and O2/CO2 (oxy-fuel conditions) ambient conditions were explored and the evolution of emissions during these tests was investigated using non-isothermal Thermo-gravimetric Analysis (TGA) technique combined with Fourier Transform Infrared (FTIR) spectroscopy. Potassium carbonate (K2CO3), calcium hydroxide (Ca(OH)2), iron (III) oxide (Fe2O3) and iron (III) chloride (FeCl3) were employed as precursors of catalysts to investigate the effects of potassium (K), calcium (Ca) and iron (Fe). Furthermo

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TOLEDO, OSCAR JAVIER CARRENO. "SYNTHESIS OF FE2COO4 SPINEL NANOPARTICLES AND STUDY OF THEIR CATALYTIC POTENTIAL FOR THE OXIDATION OF A RAW MATERIAL OBTAINED THROUGH WOOD PYROLYSIS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2017. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=36342@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>PROGRAMA DE SUPORTE À PÓS-GRADUAÇÃO DE INSTS. DE ENSINO<br>Nanopartículas de óxidos metálicos têm sido objeto de estudo devido suas propriedades ópticas, eletrônicas e magnéticas diferenciadas. Além disso, espinélios, em particular a ferrita de cobalto (Fe2CoO4), tem se destacado dado o crescente número de aplicações voltadas à exploração do seu potencial catalítico, principalmente no âmbito dos processos de química verde. Neste contexto, o presente trabalho tem como foco a sín

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Rodrigues, Gicélia. "Estudo comparativo da pirólise convencional e catalítica de óleo de soja refinado com catalisadores tipo HAlMCM-41." Universidade Federal de Sergipe, 2010. https://ri.ufs.br/handle/riufs/5065.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Nowadays, one of the major challenges worldwide is the reduction of greenhouse gas emissions, whose contribution to climatic changes was comproved. The emissions of carbon dioxide from the burning of fossile fuels are the main factor that increases the global warming. Biodiesel is a biodegradable fuel derived from renewable sources that can be obtained by different processes such as pyrolysis, esterification or even transesterification. The pyrolysis reactions refer to the rupture of carbon-carbon binding in hydrocarbons molecules.

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Khan, Muhammad Shoaib Ahmed. "Modeling of a pilot installation for the recovery of residual sludge from olive oil extraction, for the production of biofuel by catalytic pyrolysis, integrating a sorption machine driven by solar energy and / or waste heat recovered from pyrolysis gas." Electronic Thesis or Diss., Université de Lorraine, 2022. https://docnum.univ-lorraine.fr/public/DDOC_T_2022_0002_KHAN.pdf.

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Les boues d'eaux usées des moulins à huile (OMWS) constituent un problème environnemental majeur pour les pays producteurs d'huile d'olive. Diverses stratégies d'élimination des OMWS ont été proposées, en particulier la pyrolyse rapide qui est considérée comme une technique prometteuse et dont le principal produit est la bio-huile qui trouve son application comme diesel vert dans les moteurs à combustion interne. Dans la pyrolyse rapide, les vapeurs de bio-huile sont refroidies en utilisant une machine de réfrigération à compression. L'objectif de la thèse est d'intégrer une machine de réfrigé

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Chhiti, Younes. "Gazéification non catalytique des huiles de pyrolyse de bois sous vapeur d'eau." Thesis, Toulouse, INPT, 2011. http://www.theses.fr/2011INPT0064/document.

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La production d'énergie à partir de biomasse ligno-cellulosique via la technologie de gazéification est une option intéressante dans le contexte énergétique actuel. La combinaison d‘une pyrolyse rapide décentralisée de la biomasse pour produire les bio-huiles, suivie par le transport et le vaporeformage dans des bio-raffineries, est apparue comme l'une des méthodes économiquement les plus viables pour la production de gaz de synthèse (H2+CO). L‘objectif de ce travail est de combler le manque de connaissances concernant les processus de transformation physicochimique de l‘huile de pyrolyse en g

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Ozagac, Matthieu. "Étude mécanistique de l'hydroconversion catalytique de bio-huiles de pyrolyse." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSE1170/document.

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La pyrolyse rapide est un procédé thermochimique permettant la transformation de la biomasse lignocellulosique en liquide. Cette bio-huile n'est pas utilisable directement de par son instabilité thermique, sa faible capacité calorifique et son immiscibilité avec les hydrocarbures due à une teneur élevée en composés organiques oxygénés. Un procédé de raffinage prometteur est l'hydroconversion catalytique permettant la conversion de ces composés et le retrait significatif de l'oxygène. Cependant, des réactions compétitives telles que la condensation ou l'oligomérisation sont observées. Compte te

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Kassargy, Chantal. "Contribution à l’étude de la valorisation énergétique des résidus de plastique par craquage catalytique." Thesis, Ecole nationale supérieure Mines-Télécom Atlantique Bretagne Pays de la Loire, 2018. http://www.theses.fr/2018IMTA0077/document.

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La consommation continue de matières plastiques a conduit, jusqu’à 2015, à l'accumulation de 6,3 milliards de tonnes de déchets plastiques. En Europe, le recyclage des plastiques ramassés ne dépasse pas les 30% pour des raisons logistiques et économiques liées à cette filière. La valorisation énergétique de ces déchets, non valables pour le recyclage, est alors préférée aux autres modes de gestion. L’incinération étant controversée pour son bilan énergétique et environnemental, d’autres moyens de valorisation tels que la pyrolyse sont privilégiés. Les travaux de recherche menés dans cette thès

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