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Dissertations / Theses on the topic 'Pyrolysis and gasification'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Li, Jian 1957. "Pyrolysis and CO2 gasification of black liquor." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=65338.

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2

Connolly, T. Sean. "CO2 Pyrolysis and Gasification of Kraft Black." Fogler Library, University of Maine, 2006. http://www.library.umaine.edu/theses/pdf/ConnollyTS2006.pdf.

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3

Newalkar, Gautami. "High-pressure pyrolysis and gasification of biomass." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/53917.

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With the limited reserves of fossil fuels and the environmental problems associated with their use, the world is moving towards cleaner, renewable, and sustainable sources of energy. Biomass is a promising feedstock towards attaining this goal because it is abundant, renewable, and can be considered as a carbon neutral source of energy. Syngas can be further processed to produce liquid fuels, hydrogen, high value chemicals, or it can be converted to heat and power using turbines. Most of the downstream processing of syngas occurs at high pressures, which requires cost intensive gas compression

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4

Mohamed, M. "Fluidised bed gasification and pyrolysis of woodchips." Thesis, University of Leeds, 1989. http://etheses.whiterose.ac.uk/21074/.

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The work presented in this thesis includes experimental investigation using a basic fluidised bed to gasify woodchips and cold modelling studies to improve the fluid bed reactor dynamics incorporating bed internals, such as draft tubes and jets. Low grade fuel gas was produced from woodchips as feedstock, in a 154 mm i/d fluidised bed as the main experimental part of the project using air as the gasifying medium. The influence of a number of process variables on the gasification process were studied including fuel feedrates, temperatures and bed heights, with respect to their effects on qualit

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5

Patel, Manisha. "Pyrolysis and gasification of biomass and acid hydrolysis residues." Thesis, Aston University, 2013. http://publications.aston.ac.uk/19567/.

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This research was carried for an EC supported project that aimed to produce ethyl levulinate as a diesel miscible biofuel from biomass by acid hydrolysis. The objective of this research was to explore thermal conversion technologies to recover further diesel miscible biofuels and/or other valuable products from the remaining solid acid hydrolysis residues (AHR). AHR consists of mainly lignin and humins and contains up to 80% of the original energy in the biomass. Fast pyrolysis and pyrolytic gasification of this low volatile content AHR was unsuccessful. However, successful air gasification of

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6

Lewis, Aaron D. "Sawdust Pyrolysis and Petroleum Coke CO2 Gasification at High Heating Rates." BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/2498.

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Clean and efficient electricity can be generated using an Integrated Gasification Combined Cycle (IGCC). Although IGCC is typically used with coal, it can also be used to gasify other carbonaceous species like biomass and petroleum coke. It is important to understand the pyrolysis and gasification of these species in order to design commercial gasifiers and also to determine optimal conditions for operation. High heating-rate (100,000 K/s) pyrolysis experiments were performed with biomass (sawdust) in BYU's atmospheric flat-flame burner reactor at conditions ranging from 1163 to 1433 K with pa

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7

Kumar, Vipul. "Pyrolysis and gasification of lignin and effect of alkali addition." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/29609.

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Thesis (Ph.D)--Chemical Engineering, Georgia Institute of Technology, 2009.<br>Committee Chair: Sujit Banerjee; Committee Co-Chair: Wm. James Frederick, Jr.; Committee Member: John D. Muzzy; Committee Member: Kristiina Iisa; Committee Member: Preet Singh. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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8

Hosoya, Takashi. "Mechanism in Pyrolysis Gasification of Softwood at the Molecular Level." Kyoto University, 2008. http://hdl.handle.net/2433/123877.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(エネルギー科学)<br>甲第14068号<br>エネ博第177号<br>新制||エネ||41(附属図書館)<br>UT51-2008-F460<br>京都大学大学院エネルギー科学研究科エネルギー社会・環境科学専攻<br>(主査)教授坂志朗, 教授東野達, 准教授河本晴雄<br>学位規則第4条第1項該当

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Zanzi, Rolando. "Pyrolysis of biomass. Rapid pyrolysis at high temperature. Slow pyrolysis for active carbon preparation." Doctoral thesis, KTH, Chemical Engineering and Technology, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3180.

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<p>Pyrolysis of biomass consists of heating solid biomass inthe absence of air to produce solid, liquid and gaseous fuels.In the first part of this thesis rapid pyrolysis of wood(birch) and some agricultural residues (olive waste, sugarcanebagasse and wheat straw in untreated and in pelletized form) athigh temperature (800ºC1000ºC) is studied ina free fall reactor at pilot scale. These conditions are ofinterest for gasification in fluidized beds. Of main interestare the gas and char yields and compositions as well as thereactivity of the produced char in gasification.</p><p>A higher temperatu

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10

Pozzobon, Victor. "Biomass gasification under high solar heat flux." Thesis, Ecole nationale des Mines d'Albi-Carmaux, 2015. http://www.theses.fr/2015EMAC0004/document.

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L'énergie solaire concentrée est une source d'énergie alternative pour la conversion thermochimique de biomasse en vecteurs énergétiques ou en matériaux à haute valeur ajoutée. La production d'un gaz de synthèse à partir de biomasse lignocellulosique en est un exemple, de même que la production de résidus carbonés à propriétés contrôlées. Ces travaux portent sur l'étude du comportement d'un échantillon de hêtre thermiquement épais sous de hautes densités de flux solaire (supérieures à 1000 kW/m²). Deux approches ont été développées en parallèles : une étude expérimentale et le développement d'

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Jaber, Jamal Othman. "Utilisation of Jordanian oil shales and predicted environmental impacts." Thesis, Cranfield University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299805.

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12

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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13

Alevanau, Aliaksandr. "Study of pyrolysis and gasification of biomass from the self-organization perspective." Doctoral thesis, KTH, Tillämpad processmetallurgi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-162109.

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This thesis focuses on the analysis of kinetics of i) low-temperature pyrolysis of gaseous hydrocarbons, ii) high-temperature steam gasification of char of wood pellets (>700oC), iii) high temperature pyrolysis of straw pellets in an atmosphere of argon and steam, and iv) high temperature pyrolysis of slices of transversally cut wooden sticks. The results of the kinetic measurements in the high-temperature cases are approximated using a least-square based optimization software, which was specially developed to analyse kinetics prone for deviation from the Arrhenius law.In the thesis a gener

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PHOUNGLAMCHEIK, Aekjuthon. "Modellering av pyrolys i roterande trumma." Thesis, KTH, Skolan för kemivetenskap (CHE), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-173840.

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This project focuses on the numerical modeling of a rotary kiln pyrolyzer such as found in the e.g. WoodRoll multistage gasification process. The model consists of two parts: a granular flow model, and a pyrolyzer model. In the first part, Saeman's equation was employed to develop a model which can describe the behavior of solid granular flow in a rotary kiln without reaction. Residence-time distribution (RTD) is the main aim to study in this part, which was simulated by axial dispersion model (ADM). The model requires only one fitting parameter that is dispersion coefficient (Dax), which was

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15

Gustavsson, Christer. "Added value from biomass by broader utilization of fuels and CHP plants." Doctoral thesis, Karlstads universitet, Institutionen för ingenjörs- och kemivetenskaper, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-46906.

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The present work, where additional value-creating processes in existing combined heat and power (CHP) structures have been examined, is motivated by a political- and consumer-driven strive towards a bioeconomy and a stagnation for the existing business models in large parts of the CHP sector. The research is based on cases where the integration of flash pyrolysis for co-production of bio-oil, co-gasification for production of fuel gas and synthetic biofuels as well as leaching of extractable fuel components in existing CHP plants have been simulated. In particular, this work has focused on the

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16

Efika, Emmanuel Chidi. "Hydrogen rich syngas from the pyrolysis and gasification of solid waste and biomass." Thesis, University of Leeds, 2013. http://etheses.whiterose.ac.uk/4943/.

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Biomass and wastes are potential resources for the production of renewable hydrogen, synthetic fuels, chemicals and energy via pyrolysis and gasification. Waste biomass and refuse derived fuel (RDF), and their single components were investigated for pyrolysis to produce a hydrogen rich syngas with a bench scale fixed bed reactor. The samples were pyrolysed at different temperatures, heating rates and particle sizes to recover syngas, oil and char products. The waste biomass was investigated for steam pyrolysisgasification in a continuous screw kiln reactor to produce hydrogen. The samples were

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17

Messenbock, Reinhard Christoph. "Rapid pyrolysis and gasification of coal in a high-pressure wire-mesh reactor." Thesis, Imperial College London, 1998. http://hdl.handle.net/10044/1/7740.

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18

PERSNIA, YOSRA. "Thermogravimetric analysis and modeling of pyrolysis of macroscopic wood particles." Thesis, KTH, Skolan för kemivetenskap (CHE), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-190841.

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The knowledge of kinetics of pyrolysis is important. It is also challenging to find parameters for kinetic which can be applied at different sizes of biomass. Many researchers have been investigating the pyrolysis behavior of wood powders due to heat and mass transfer limitations. They have also been focusing on determining the effects of feedstock characterization, residence time, gas environment, heating rate and the final temperature as well as the arrangement of the pyrolysis reactor and modeling of the kinetics. This project presents a qualitative understanding of the pyrolysis process ba

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Ephraim, Augustina. "Valorization of wood and plastic waste by pyro-gasification and syngas cleaning." Thesis, Ecole nationale des Mines d'Albi-Carmaux, 2016. http://www.theses.fr/2016EMAC0019/document.

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Les déchets de bois et de plastiques sont des ressources prometteuses pour la production du gaz de synthèse (syngaz) par la pyro-gazéification grâce à leurs disponibilités et leurs caractéristiques énergétiques. Cependant, le syngaz issu de ces déchets peut contenir des teneurs élevées en chlorure d’hydrogène (HCl) qui est corrosif et toxique et qui doit donc être éliminé. Premièrement, les expériences de pyrolyse des mélanges de bois de peuplier et de plastiques ont mis en évidence l’influence des plastiques sur les produits obtenus. En effet, le HDPE et PS augmentent resp

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20

De, Waal Fransie. "Investigation of coal agglomeration in a non-pressurized gasifier / Fransie de Waal." Thesis, North-West University, 2008. http://hdl.handle.net/10394/2822.

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21

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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22

Zhang, Ling. "Sunlight Ancient and Modern: the Relative Energy Efficiency of Hydrogen from Coal and Current Biomass." Thesis, Available online, Georgia Institute of Technology, 2004:, 2004. http://etd.gatech.edu/theses/submitted/etd-08182004-145924/unrestricted/zhang%5Fling%5F200412%5Fmast.pdf.

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Thesis (M.S.)--Chemical Engineering, Georgia Institute of Technology, 2005.<br>Jones, Christopher, Committee Member ; White, David, Committee Member ; Teja, Amyn, Committee Member ; Realff, Matthew, Committee Chair. Includes bibliographical references.

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23

Maseko, Keabetswe. "Plasma biomass gasification in a 15 kW pilot facility." Diss., University of Pretoria, 2020. http://hdl.handle.net/2263/79279.

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Plasma gasification experiments were conducted on sucrose and crushed macadamia nutshells. The pilot-scale plasma gasification system used comprises a 15 kW DC plasma torch fitted to a 5 L gasification reactor. The DC plasma torch has an efficiency of ~30 % with most of the energy lost in the torch anode. For the macadamia nutshells, the plasma input-power was set at 9, 11 and 14 kW. At each power input setting, four different feed rates were investigated, namely 0.5, 0.7, 1.04 and 1.14 kg/h. It was observed that as the power increases, conversion increases from 48 % at 9 kW to higher than 80

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Ulstad, James Steven. "Gas evolution of corn kernels, oat hulls, and paper sludge from biomass gasification." Thesis, University of Iowa, 2010. https://ir.uiowa.edu/etd/899.

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Gasification of biomass has become an area of key interest as it is a reasonably quick and direct way of converting material into a fuel source that works in many industrial systems. The purpose of the present work is to explore biomass gasification and in particular pyrolysis behavior of corn kernels, oat hulls, and paper sludge. For the materials, low temperature gasification behavior was studied. Here, tests were performed with pyrolysis temperatures from 400 - 800°C, at 1 atm and a rapid heating rate. A small concentration of O2 was added to the gasification agent (N2) to enhance CO yields

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Young, Christopher Michael. "Pressure Effects on Black Liquor Gasification." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/11539.

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Gasification of black liquor is an alternative to the combustion of black liquor, which is currently the dominant form of chemical recovery in the paper industry. Gasification of black liquor offers the possibility of higher thermal efficiencies than combustion, reducing manufacturing costs and creating new revenue streams through a forest biorefinery. Pressurizing the gasification reactor further enhances the efficiency advantage of gasification over combustion. This study uses a pressurized entrained flow reactor (PEFR) to study black liquor gasification behavior under pressures, tempera

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26

Zhou, Chunguang. "Gasification and Pyrolysis Characterization and Heat Transfer Phenomena During Thermal Conversion of Municipal Solid Waste." Doctoral thesis, KTH, Energi- och ugnsteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-154587.

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The significant generation of municipal solid waste (MSW) has become a controversial global issue. Pyrolysis and gasification technologies for treating rejects from solid waste disposal sites (SWDSs), for which over 50 % of MSW is attributed to combustible species, have attracted considerable attention. MSW is an alternative energy source that can partly replace fossil resources; there is an increasing awareness that global warming caused by the utilization of fossil resources is occurring. The goal of this thesis is to realize the efficient and rational utilization of MSW and decrease the har

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27

Blanco, Sanchez Paula Helena. "Nickel based catalysts for hydrogen production from the pyrolysis/gasification of refuse derived fuel (RDF)." Thesis, University of Leeds, 2014. http://etheses.whiterose.ac.uk/7414/.

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Hydrogen can be used as fuel for power generation; however current hydrogen production processes are not sustainable as they involve considerable CO2 emissions, and are mostly based on production from fossil fuels. Municipal solid waste (MSW) in the form of refuse derived fuel (RDF) can be subjected to thermal processes such as pyrolysis and/or gasification to produce a hydrogen rich syngas. Nevertheless some operational problems associated with tar formation arise, which significantly reduces the overall process yield. In this work a two-stage reaction system was used for hydrogen production

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28

Middleton, Stephen Philip. "Partitioning of sulphur and nitrogen in pyrolysis and gasification of coal in a fluidised bed." Thesis, Loughborough University, 1997. https://dspace.lboro.ac.uk/2134/27972.

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The aim of this study was to gain a better understanding of the processes governing the distribution of the heteroatoms, sulphur and nitrogen, between the various products formed during fluidised bed pyrolysis/gasification under conditions particularly relevant to industrial hybrid combined cycle power generation.

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29

Bach, Oller Albert. "Co-gasification of black liquor and pyrolysis oil: Fuel conversion and activity of alkali compounds." Licentiate thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-132.

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Gasification using entrained flow reactors generates syngas that can be upgraded tochemicals with little gas cleaning. Black liquor (BL) is a by-product from pulping industrythat consists of residual wood constituents and spent pulping chemicals. Currently, it iscombusted to recycle the pulping chemicals and at the same time generate steam and power.Alternatively, BL is one of the most attractive fuels for entrained flow gasification due to thecatalytic activity of alkali compounds inherent in BL, possibility for pressurized feeding andthe shared logistics with the pulping plant. However, the

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Rasol, Hepa. "Influence of Potassium on Gasification Performance." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-10350.

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To release energy from chemically stored energy in the biomass was the new investigation in recent years. Utilizing of biomass for this purpose occur in two different ways, directly by burning (combustion) the biomass and indirectly by pyrolysis process which will convert the biomass to three main products, bio- tar, bio- char and synthetic gas. Biomass contains different amount of inorganic compound, especially alkali metals which causes some diverse impacts on combustion, pyrolysis and gasification process such as corrosion, agglomeration and fouling problems. This project aims to investigat

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Mate, Marc. "Numerical Modelling of Wood Pyrolysis." Thesis, KTH, Skolan för kemivetenskap (CHE), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-206852.

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In this project, a numerical model describing the reaction mechanism and the mass and energy transport in wood pyrolysis is studied. The applicability of the model in predicting actual biomass pyrolysis assessed by comparing the model to TGA experimental measurements. The comparison to experiments is done in relation to the mass loss characteristics of chips of varying sizes. The mass loss is of interest as it is a variable necessary in the coupling of reactor and particle models. Three reaction models were simulated and results compared to experimental data, namely, the reaction model develop

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Bojler, Görling Martin. "Energy system evaluation of thermo-chemical biofuel production : Process development by integration of power cycles and sustainable electricity." Doctoral thesis, KTH, Energiprocesser, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-105814.

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Fossil fuels dominate the world energy supply today and the transport sector is no exception. Renewable alternatives must therefore be introduced to replace fossil fuels and their emissions, without sacrificing our standard of living. There is a good potential for biofuels but process improvements are essential, to ensure efficient use of a limited amount of biomass and better compete with fossil alternatives. The general aim of this research is therefore to investigate how to improve efficiency in biofuel production by process development and co-generation of heat and electricity. The work ha

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Aboyade, Akinwale Olufemi. "Cogasification of coal and biomass : impact on condensate and syngas production." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/20405.

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Thesis (PhD)--Stellenbosch University, 2012.<br>ENGLISH ABSTRACT: Gasification provides a proven alternative to the dependence on petroleum for the production of high value products such as liquid fuels and chemicals. Syngas, the main product from gasification can be converted to fuels and chemicals via a number of possible synthesis processes. Coal and natural gas are currently the main feedstock used for syngas production. In South Africa (SA), Sasol operates the largest commercial coal-to-liquids conversion process in the world, based on updraft fixed bed gasification of low grade coa

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Pham, Xuan Huynh. "Oxidative pyrolysis of biomass pellets in a fixed bed." Thesis, Perpignan, 2018. http://www.theses.fr/2018PERP0029/document.

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La gazéification étagée est une technologie innovante pour la production d’énergie renouvelable de petite et moyenne puissances, pour laquelle l'élargissement de la gamme de biomasses utilisables constitue un enjeu majeur de développement. Cette thèse porte spécifiquement sur la pyrolyse oxydante en lit fixe, première étape clé du procédé, qui conditionne fortement la performance et la fiabilité de cette technologie. Trois types de biomasses – pin, miscanthus, et paille – conditionnées sous forme de granulés ont été étudiés. Une étude expérimentale a été réalisée sur un réacteur pilote à lit f

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Forbid, George Teke [Verfasser], and Günter [Akademischer Betreuer] Busch. "Thermal recycling of plastic waste using pyrolysis-gasification process for energy production / George Teke Forbid. Betreuer: Günter Busch." Cottbus : Universitätsbibliothek der BTU Cottbus, 2012. http://d-nb.info/1025079264/34.

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Guizani, Chamseddine. "Effects of CO2 on the biomass pyro-gasification in High Heating Rate and Low Heating Rate conditions." Thesis, Ecole nationale des Mines d'Albi-Carmaux, 2014. http://www.theses.fr/2014EMAC0010/document.

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La présente étude porte sur les effets de CO2 sur la pyrolyse de la biomasse et la gazéification de chars dans des conditions de chauffe lente et de chauffe rapide. Dans la première partie de ce travail, nous avons étudié les effets du CO2 sur la réaction de pyrolyse rapide à haute température et évalué ses effets sur la vitesse de pyrolyse, sur le rendement de gaz ainsi que sur les propriétés du char. Nous avons aussi étudié la réaction de gazéification en atmosphère mixte en présence de CO2 et de H2O. Enfin, nous avons imaginé le cas hypothétique d’un gazogène au CO2 pur. Le cas d’une pyro-g

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Bhagavatula, Abhijit. "THERMO-CHEMICAL CONVERSION OF COAL-BIOMASS BLENDS: KINETICS MODELING OF PYROLYSIS, MOVING BED GASIFICATION AND STABLE CARBON ISOTOPE ANALYSIS." UKnowledge, 2014. http://uknowledge.uky.edu/cme_etds/43.

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The past few years have seen an upsurge in the use of renewable biomass as a source of energy due to growing concerns over greenhouse gas emissions caused by the combustion of fossil fuels and the need for energy independence due to depleting fossil fuel resources. Although coal will continue to be a major source of energy for many years, there is still great interest in replacing part of the coal used in energy generation with renewable biomass. Combustion converts inherent chemical energy of carbonaceous feedstock to only thermal energy. On the other hand, partial oxidation processes like ga

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Hoffman, Jakobus Willem. "Ionizing radiation as imaging tool for coal characterization and gasification research / Hoffman, J.W." Thesis, North-West University, 2012.

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In this study, imaging with ionizing radiation was evaluated as a research technique in coal research. Part of the evaluation was to conduct a thorough literature survey as well as a preliminary investigation into coal pyrolysis and gasification with micro–focus X–ray tomography. The literature survey summarizes previous research experiences, primarily focussing on the possibility of utilizing a specific coal bed for carbon dioxide sequestration and methane production. This includes quantifying the fracture and cleat network and visualizing the orientation of this network. The cleat and fractu

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Shurtz, Randy C. "Effects of Pressure on the Properties of Coal Char Under Gasification Conditions at High Initial Heating Rates." BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/2877.

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The effects of elevated pressure and high heating rates on coal pyrolysis and gasification were investigated. A high-pressure flat-flame burner (HPFFB) was designed and built to conduct these studies. The HPFFB was designed to provide an environment with laminar, dispersed entrained flow, with particle heating rates of ~10^5 K/s, pressures of up to 15 atm, and gas temperatures of up to 2000 K. Residence times were varied from 30 to 700 ms in this study. Pyrolysis experiments were conducted at particle heating rates of ~10^5 K/s and maximum gas temperatures of ~1700 K at pressures of 1 to 15 at

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Peter, E. Akhator. "Design and Construction of a Small-Scale Fixed-Bed Reactor." Thesis, Högskolan i Borås, Institutionen Ingenjörshögskolan, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-17971.

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As biomass and municipal solid wastes become increasingly viable fossil fuels alternatives, more researches are being conducted to improve on the processes for their conversion to energy or energy carriers. Gasification is one of such processes and it forms the core of this project. This project presents a specified design of a small-scale fixed-bed reactor for the purpose of investigating the gasification processes of biomass and municipal solid wastes. Gas extraction ports are evenly distributed along the height of the reactor to extract product gases and accommodate thermo-couples for tempe

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Mirjana, Ćeranić. "Uticaj procesnih parametara na pirolizu i gasifikaciju oklaska kukuruza." Phd thesis, Univerzitet u Novom Sadu, Fakultet tehničkih nauka u Novom Sadu, 2015. http://www.cris.uns.ac.rs/record.jsf?recordId=95537&source=NDLTD&language=en.

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U doktorskoj disertaciji vr&scaron;eno je ispitivanje procesa pirolize i gasifikacijeoklaska kukuruza. Istraživanje procesa pirolize obuhvatalo je definisanjeuticaja procesnih parametara (temperature pirolize, reakcionog vremena,brzine zagrevanja i veliĉine ĉestica) na prinos ĉvrstog ostatka i pirolitiĉkoggasa. Osim toga, vr&scaron;eno je ispitivanje sastava gasa u zavisnosti odtemperature. UtvrĊeno je da ispitivani procesni parametri imaju uticaj naprinos ĉvrstog ostatka i bio-ulja, kao i na prinos i sastav pirolitiĉkog gasa.Tokom ispitivanja procesa gasifikacije razvijen je funkcionalni mate

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SHAKYA, BIKRAM D. "PYROLYSIS OF WASTE PLASTICS TO GENERATE USEFUL FUEL CONTAINING HYDROGEN USING A SOLAR THERMOCHEMICAL PROCESS." University of Sydney, 2007. http://hdl.handle.net/2123/1709.

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Master of Engineering<br>Global warming and diminishing energy supplies are two major current concerns. Disposal of plastic wastes is also a major concern. The aim of this research is to address these three concerns by developing a solar powered process, using waste plastics as fuel to generate energy. Research into: i) solar concentrators for high temperature thermochemical processes, and ii) pyrolysis/gasification of waste plastics has been separately reported in the literature. In this study the aim was to bring these fields of research together to design a solar receiver-reactor suitable f

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Ng, Kok Siew. "Decarbonised polygeneration from fossil and biomass resources." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/decarbonised-polygeneration-from-fossil-and-biomass-resources(e3b9e6d2-9716-44ca-b775-0ffe88fb47f1).html.

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Utilisation of biomass resources and CO2 abatement systems in currently exploited fossil resource based energy systems are the key strategies in resolving energy sustainability issue and combating against global climate change. These strategies are affected by high energy penalty and high investment. Therefore, it is imperative to assess the viability of these energy systems and further identify niche problem areas associated with energy efficiency and economic performance improvement. The current research work has two parts. The first part presents techno-economic investigation of thermochemi

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Lewis, Aaron D. "Gasification of Biomass, Coal, and Petroleum Coke at High Heating Rates and Elevated Pressure." BYU ScholarsArchive, 2014. https://scholarsarchive.byu.edu/etd/4373.

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Gasification is a process used to convert any carbonaceous species through heterogeneous reaction to obtain the desired gaseous products of H2 and CO which are used to make chemicals, liquid transportation fuels, and power. Both pyrolysis and heterogeneous gasification occur in commercial entrained-flow gasifiers at pressures from 4 to 65 atm with local gas temperatures as high as 2000 °C. Many gasification studies have been performed at moderate temperatures, heating rates, and pressures. In this work, both pyrolysis and char gasification experiments were performed on coal, petroleum coke, an

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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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Jaimes, Figueroa Jaiver Efren 1986. "Processos termoquímicos para processamento de bagaço de cana-de-açúcar : pirólise em leito fixo e gaseificação em leito fluidizado." [s.n.], 2015. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266032.

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Orientador: Maria Regina Wolf Maciel<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-27T09:30:10Z (GMT). No. of bitstreams: 1 JaimesFigueroa_JaiverEfren_D.pdf: 4291833 bytes, checksum: dc5592f8288a01f2f792aac9bf02f01b (MD5) Previous issue date: 2015<br>Resumo: Os processos termoquímicos permitem a conversão da biomassa em outros produtos de maior interesse e valor agregado. Dentre os processos termoquímicos destacam-se a pirólise e a gaseificação, sendo o alcatrão e gases, os principais produtos resultantes. Este

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Donaj, Pawel. "Conversion of biomass and waste using highly preheated agents for materials and energy recovery." Doctoral thesis, KTH, Energi- och ugnsteknik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-34253.

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One of the greatest challenges of human today is to provide the continuous and sustainable energy supply to the worldwide society. This shall be done while minimizing all the negative consequences of the operation(s) to the environment and its living habitants including human beings, taking from the whole life cycle perspective. In this thesis work new solutions for treatment biomass and waste are analyzed. Based on the fundamental research on the conversion of various materials (biomass: straw pellets, wood pellets; and waste: plastic waste, ASR residues after pyrolysis), converted by means

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Pham, Thi Mai Thao. "Environmental and economic potential of rice husk use in An Giang province, Vietnam." Technische Universität Dresden, 2016. https://tud.qucosa.de/id/qucosa%3A32619.

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To evaluate CO2 emission mitigation potential and cost effectiveness of rice husk utilization, Life Cycle Analysis was conducted for 9 scenarios. The results showed that, gasification is the most efficient CO2 mitigation. From cost analysis, the cost mitigation can be achieved by replacing the current fossil fuels in cooking scenarios. Among the power generation scenarios, it was found that 30MW combustion and 5MW gasification power generations were the most economically-efficient scenarios. The briquette combustion power generation appeared less cost-competitive than direct combustion, whilst

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Kessas, Sid Ahmed. "Etude expérimentale de pyrolyse et de vapogazéification des boues de STEP en réacteurs à lit fluidisé entre 700 et 900°C : comparaison avec les déchets boisés." Thesis, Toulouse, INPT, 2019. http://www.theses.fr/2019INPT0113.

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La gazéification des biomasses lignocellulosiques apparaît actuellement comme une solution technologique prometteuse permettant la production d’un gaz à haute valeur ajoutée, utilisable dans de nombreuses applications. Cependant, les tensions qui commencent à apparaître sur le marché du bois incitent les acteurs du secteur à se tourner vers d’autres ressources lignocellulosiques telles que les résidus agricoles, les déchets verts municipaux et les boues de STEP. Suivant les cas, ces déchets sont vus comme des effluents à traiter dont le coût peut être parfois nul ou négatif. L’objectif de ces

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Figueiredo, Flavio Augusto Bueno. "Pirolise e gaseificação de casca de castanha de caju : avaliação da produção de gas, liquidos e solidos." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/264095.

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Orientador: Caio Glauco Sanchez<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica<br>Made available in DSpace on 2018-08-13T05:14:36Z (GMT). No. of bitstreams: 1 Figueiredo_FlavioAugustoBueno_D.pdf: 4083626 bytes, checksum: 203f07dd538191c353f5988fc849f84e (MD5) Previous issue date: 2009<br>Resumo: Os processos de gaseificação e pirólise sofrem grande influência do tipo de biomassa que está sendo utilizada propiciando variações na distribuição dos produtos (alcatrão, cinzas, água, gás). No processo de gaseificação é obtido, principalmente, um gás combu

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