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Biodiesel production from used cooking oil using novel solid acid catalysts
Thesis About Biodiesel Free Essays
The research in this thesis is accomplished through performing four tasks: 1 identification of the statistical variability in wastewater grease composition and its subsequent impact on biodiesel production capacity, 2 exploration of processing methods and their performance in meeting biodiesel fuel specifications, 3 evaluation of the environmental performance of biodiesel produced from wastewater grease feedstock, and 4 analysis of economic and environmental feasibility of producing biodiesel from wastewater greases. The two wastewater greases investigated in this thesis are grease trap waste GTW , which is collected at restaurants, and sewage scum grease SSG , which is collected at wastewater resource recovery facilities WRRFs. Because wastewater greases are heterogeneous, degraded, and contain large amounts of water, solids, and impurities, GTW and SSG require different chemistry and additional processing steps for biodiesel production compared to conventional biodiesel feedstocks. The composition variability and a variety of parameters including wastewater quality are assessed during a year-long longitudinal study of GTW and SSG. Technical feasibility of biodiesel production is assessed using a variety of reactors and distillation techniques. This thesis presents life cycle assessment LCA and techno-economic analysis to determine the environmental impacts and economics of biodiesel produced from wastewater greases. A process model is used to incorporate experimental biodiesel processing results and to create an inventory of the materials and energy required for biodiesel production.
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A Comprehensive Analysis of Biodiesel Fuel Thesis
This item is under embargo and not available online per the author's request. Wenxin Xu , Washington University in St. Louis Follow.
Recently, non-catalytic biodiesel production using supercritical technology has received a significant interest due to its numerous advantages including short reaction time, high yield of biodiesel, elimination of catalyst preparation and separation costs and its applicability for various feedstock. This study has introduced an in-depth assessment for the valorisation of both low and high acid values waste cooking oils WCO into biodiesel using supercritical methanolysis. The effects of different process variables have been investigated including methanol to oil M:O molar ratio, temperature, pressure and time. Both transesterification and esterification reactions have been extensively studied.