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This paper looked at the potential and available alternative conversion paths for fuels and chemicals production away from the conventional conversion processes of fossil based fuels. Lignocellulosic biomasses are abundant, renewable, and domestically available energy resources. Though with its own attendant challenges, there are achievements and prospects that have been made in developing environmentally friendly processes for small and large scale conversion of lignocelluloses to different fuels and chemicals. With the continuous reliance on fossil fuels, there is the ever increasing climate change caused by the increasing greenhouse gas emissions such as carbon dioxide. Biomass from marine, trees, plants, animal wastes, food and non- food crops, grains, and wood based can produce fuels such as ethanol, butanol, and other chemicals through some promising technologies. Therefore, identifying ways to improving production efficiency of fuels and chemicals during biomass conversion processes to a sustainable level is very crucial.

This study exploited the solvent extraction and mechanical agitation techniques for the remediation of soils contaminated with polycyclic aromatic hydrocarbons (PAHs). The removal of pollutants from diesel contaminated site through ethanol, hexane, and ethanol-hexane mixtures was evaluated. 50 g dried contaminated soil was placed in a Soxhlet extractor and 250 ml solvent (ethanol, or hexane, or ethanol-hexane mixture) was added with extraction occurring at different temperatures of 30, 35, 45, 50, and 60 °C for 16 h. Mechanically agitated method was carried out by weighing out an equal amount of 50 g of the contaminated soil, thoroughly washing with 250 ml of ethanol, hexane, and equal ratio of ethanol to hexane. Qualitative analysis recovered PAHs was done by Agilent series gas chromatography equipped with flame ionization detector. The chromatographic evaluations of the solvent extraction of the contaminated soil showed that more of the polluted compounds were removed when hexane was the solvent. The maximum yield of extracted diesel by the solvent hexane was 11.84% at 60 °C. Extracted diesel removal was also directly proportional to periods of extraction.