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Jiang, Peng Gasification-based clean conversions and utilizations of coal, oil shale and biomass. PhD thesis, University of Nottingham. Gasification-based conversion of solid fuels into syngas for power and chemical product generations is regarded as the cleanest and most efficient thermal process. The objectives of this study is to have an in depth understanding of gasification and co-gasification of coal, oil shale and biomass in terms of its kinetics, thermodynamics, coal gasification phd thesis, economics and environmental impacts through the combination of lab experiments and simulations.
To summarize, the work carried out in this study can be divided into the following three parts. The first part focused on coal pyrolysis and gasification.
Firstly, an isothermal CO2 gasification of four coal chars prepared via two different heating regimes, i, coal gasification phd thesis. Secondly, the gasification performances of coal and its corresponding macerals i.
vitrinite, liptinite and inertinite as well as the interactions among macerals under typical gasification conditions were investigated. The relationships between synergistic coefficients of gasification indicators were correlated well with maceral contents.
The increase of gasification temperature was found promoting the synergistic coefficients slightly, whilst at an oxygen-to-coal mass ratio of 0. Thirdly, the distributions and speciation of nine hazardous heavy metals i. The morphology of fine slags appeared fragmentized, small spheres and covered with fine floccules, whilst coarse slags were vitreous, angular and less porous than that of fine slags.
The elements of Cr, Cu, Ni, V and Zn were mainly in residual fractions The second part focused on thermal co-processing of coal and oil shale via combustion and gasification at laboratory scale. The thermal behaviours of co-combustion of Qinghai QH coal and Fushun FS oil shale were evaluated. Coal gasification phd thesis increase of heating rates promoted the combustion performances.
Significant synergistic interactions were observed in the temperature range of - oC. Besides, Flynn—Wall—Ozawa and Kissinger—Akahira—Sunose models were employed to derive the activation energy and the lowest apparent activation energy was found to be Pre-exponential factors and reaction mechanism functions were investigated using an integral master-plots method. The slagging and fouling tendencies were alleviated with the addition of oil shale in combustion. A back propagation neural network optimized by genetic algorithm Coal gasification phd thesis was applied to predict gasification mass loss curves at various heating rates, blending ratios and gasification temperatures.
The GA-BPNN model was validated effectively using the experimental data, and the shrinking core kinetic model was found to be a better fit than the volumetric model. The last part focused on process simulations of gasification plants for olefins production using renewable biomass, coal gasification phd thesis. An indirect steam gasification of biomass to olefins IDBTO coupled with CO2 utilization process was proposed, coal gasification phd thesis.
Comparisons of IDBTO and direct oxygen-steam gasification of biomass to olefins DBTO were performed in terms of their energy and exergy efficiencies, net CO2 emissions, and economics, coal gasification phd thesis. Meanwhile, the quantitative economic performances net present value and internal rate of return of IDBTO were superior than that of the DBTO process.
Nottingham eTheses. Login Admin. Gasification-based clean conversions and utilizations of coal, oil shale and biomass. PDF Thesis - as examined - Repository staff only until 15 October Subsequently available to Repository staff only - Requires a PDF viewer such as GSviewXpdf or Adobe Acrobat Reader Download 7MB Request Thesis Abstract Gasification-based conversion of solid fuels into syngas for coal gasification phd thesis and chemical product generations is regarded as the cleanest and most efficient thermal process.
Subsequently available to Repository staff only - Requires a PDF viewer such as GSviewXpdf or Adobe Acrobat Reader Download coal gasification phd thesis Request Thesis. Jiang, Peng.
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is a professional essay writing service that offers reasonable prices for high-quality writing, editing, and proofreading. The service Coal Gasification Phd Thesis is an effective solution for those customers seeking excellent writing quality for less money. We guarantee % confidentiality and anonymity Although non-existent in , by coal-to-liquid-fuel producers are expected to consume as much coal as coke plants. Thus, the production of transportation fuels is an additional end-use where coal and natural gas could compete as the fuel of choice. The goal of this research is to compare coal and natural gas for use by the electric power Gasification-based conversion of solid fuels into syngas for power and chemical product generations is regarded as the cleanest and most efficient thermal process. The objectives of this study is to have an in depth understanding of gasification (and co-gasification) of coal, oil shale and biomass in terms of its kinetics, thermodynamics, economics and environmental impacts through the
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