Use this URL to cite or link to this record in EThOS: http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.556131
Title: Intensified, integrated gasification system development
Author: Çalkan, Ömer Faruk
Awarding Body: University of Newcastle Upon Tyne
Current Institution: University of Newcastle upon Tyne
Date of Award: 2007
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Abstract:
An intensified gasification system consisting of the gasifier reactor and the clean up system was developed for new feed stocks in pilot plant (ea. 50 kWe output). An industrial system (ea. 1 MWe capacity) scaled up from the pilot plant was also constructed and commissioned. PolyHIPE Polymers (PHP) both in laboratory and industrial scale were produced and functionalized/characterized for gas conditioning and water treatment processes associated with the gasifier operation. The gasification process converts any carbon-containing material into a combustible gas composed primarily of carbon monoxide, hydrogen and methane, which can be used as a fuel to generate electricity and heat. Gasification adds value to low or negative feed stocks by converting them to marketable fuels and products Two new feed stocks; bone meal and oil sludge, were gasified in small scale pilot plant gasifier system. The system performance was reliable and there were no major problems in operating the gasifier and performance of the instrumentation during the tests. The most important experimental objective which was to determine the producer gas quality during stabilized continuous runs was successfully achieved. The commissioning of the industrial scale gasifier system was completed during the course of this research. The initial results of commissioning tests which were performed by using wood chips, bone meal and municipal solid waste (MSW) are accounted in this study. The pre-treatment of these feed stock materials were studied as well as gasification characteristics. The main focus of commissioning runs was to evaluate the performance and efficiency of process instrumentation and determine the problems associated with the gasification and pre-treatment systems. The commissioning runs were successful in terms of achieving these main goals. The experiences transferred from the small scale gasification experiments were crucial in understanding and solving the problems associated with the system. The gas qualities from both scale of operation were very similar. 11 Production, modification and demonstration of the potential of polyHIPE polymers as an effective medium for water and gas treatment were also aimed in this study. It was shown that the functionalization of PolyHIPE Polymers could be intensified and the technique resulted in the formation of a new class of nano-structured micro-porous polymers with enhanced surface area and micro and nano-connectivity of the pores. Modification of the chemical and structural characteristics of the PHP was achieved by two novel methods of sulphonation which were developed by intensifying the principles of conventional techniques. Prior to sulphonation PHP demonstrates hydrophobic characteristics, where after sulphonation a hydrophilic form is produced. Sulphonated PHP can act as an ion exchange module and is capable of adsorbing species from a solution or a waste stream. The capability of the PHP as an efficient ion exchange module has been demonstrated by using a nickel solution as the model. The potential of the PHP as a filtering media was also realised by the results obtained in tests conducted with the waste scrubber water from the gasification system. Hydrophilicity is required if dehumidification of the gas streams are desired. The polymers containing 2-vinyl pyridine which were developed by the Process Intensification and Miniaturisation (PIM) Group in the University of Newcastle, already exhibits hydrophilic characteristics and do not require and modification. These polymers were tested for gas purification in a packed column. Production of these polymers in industrial scale was also accomplished. The ultimate aim of the research was to develop an intensified gasification system which employs PHP for both gas purification and water treatment. Gasification operation was successfully demonstrated in both small and industrial scale, as well as the demonstration of the potential of PHP in gas and water treatment processes in bench scale.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.556131  DOI: Not available
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