الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Enormous quantities of agricultural wastes are generated annually worldwide. Some useful applications of biomass such as animal fodder, fertilizer, paper making, source of energy in rural stoves and panel boards are widely adopted. However, large quantities are disposed of sporadically causing severe environmental problems. One of the most problematic agriculture wastes is rice straw which is generated in huge amounts over a limited harvesting period. Biomass is an abundant organic material composed of cellulose, hemicellulose and lignin. Biomass may be converted into useful products to offset petroleum based products. Fast pyrolysis is the rapid thermal decomposition of a feedstock at moderate temperatures and atmospheric pressures in the absence of oxygen. Products include a dark brown liquid called bio-oil, a solid charcoal like material named char or bio-char and a non-condensable gas. Bio-oil is a complex oxygenated liquid that has applications in heat and power, transportation fuels and specialty chemicals. A free-fall fast pyrolysis reactor was selected for this thesis because of its simple design and lack of moving parts. The goal of this thesis is to develop a new biomass fast pyrolysis reactor that improves upon inefficiencies in traditional reactors while maintaining high bio-oil yields.