الفهرس 
World Energy OutlookOnly 14 pages are availabe for public view
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Abstract
Biomass as renewable energy source gets increasing attention in the recent years since it can be utilized through different methodologies.Gasification of the waste biomass is considered as a promising technique to eliminate the formidable environmental issues accompanied with open field burning.The objective of the present study is to valorize the waste biomass through experimental study using manufactured Imbert based design gasifier.Cotton stalks and date palm fronds midrib (DPFM) are used as feed stock materials with different particle size and density. Air is used as a gasifying agent and introduced in a swirl flow to the gasifier at the combustion zone. It is internally preheated by the hot produced gas. Each feedstock material is fed in batch of 4 kg while the air flow rate is supplied and varied within a wide range of 60-200 l/min. to obtain clean gas, cleaning systems such as cyclone separator, wet scrubber and charcoal filter are conducted downstream the reactor. The gasification process characteristic
are evaluated in terms of lower heating value, gasification efficiency, carbon
conversion efficiency and produced gas yield. The dynamic behavior of the
gasification process is studied to understand the inside activities of the
reactor through temperature, produced gas composition and pressure drop. The DPFM exhibited considerable stable better findings than cotton stalks. The optimum average values of lower heating value (LHV), cold gas efficiency (CGE) and carbon conversion efficiency(CCE)are 4.76 MJ/m3,
75.79% and 76% respectively for DPFM at 150 l/min air flow rate. Whereas for cotton stalks, they are 4.61 MJ/m3, 57.45% and 69.78% respectively at
125 l/min air flow rate. Regarding to equivalence ratio (ER), it is estimated
based on the biomass consumption rate and air flow rate. For cotton stalks,
ER varied from 0.305 to 0.195 when the air flow rate increases from 60 t
200 l/min. whereas it is almost unchanged in the case of DPFM.