University of Khartoum

Integration of Lignocellulosic Biofuels into Existing Petroleum Refineries

Integration of Lignocellulosic Biofuels into Existing Petroleum Refineries

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Title: Integration of Lignocellulosic Biofuels into Existing Petroleum Refineries
Author: Ali, Asmaa Ali Mohamed
Abstract: The main objective of this research is to find an economically feasible conditions in a petroleum refinery at which lignocellulosic bio-oil co-processing would be viable. Lignocellulosic biofuels can be produced by a lot of types of processes such as fast pyrolysis of biomass and eventually upgraded by processes of hydrotreating and hydrocracking. From the technical point of view, co-processing of bio oil which is a biofuel similar to crude oil with some intermediate petroleum feeds has been demonstrated. In this work, fast pyrolysis of baobab shells biomass had been conducted and the effects of reaction temperature, biomass particle size and residence time had been investigated against products yield. It's found that the maximum liquid yield of baobab fast pyrolysis process was obtained at 500 OC, less than 0.5 mm particle size and at 1.2 seconds residence time. Techno – economic analysis of co-processing bio oil from groundnut shells with conventional long residue in a Fluid Catalytic Cracking (FCC) unit of a petroleum refinery was also conducted. Sensitivity analysis and the effects of crude oil prices, refinery feed rates, pyrolysis plant capacity and pyrolysis yield were examined against the Net Present Value (NPV) of the base case petroleum refinery. Co-processing bio oil from groundnut shells with long residue was found to be sensitive to crude oil prices and refinery feed rates and it would be economically feasible at crude oil prices higher than 120 $/bbl. It is recommended to conduct further research on issues including the production of an improved quality of raw bio oil and lowering the cost of production.
URI: http://khartoumspace.uofk.edu/123456789/25011


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