Charcoal Yield from Urban-Tree Residues Generated in University of Ibadan, Nigeria using Earth Mound Method

Though gasification technology is upgrading and attracting researchers to invent new ways to produce good amount of useful bio-fuels, the presence of tar and hazardous gaseous contents obtained in the form of residues and also from emissions is still a major problem for many end users. Many researchers till this date have tried and tested new methods and were nearly successful in their attempts to remove tar completely. A review is conducted in search for new technologies to obtain tar free clean producer gas. In this paper focus is lead on methods applied for pre-treatment of biomass for cracking down the complex polymer structure - lignocellulose into porous materials, advantages of using agriculture sludge as biomass fuel, ways to obtain a sludge feedstock composition which would not lead to tar formation during gasification process, modification of gasifier design and operating parameters, In-situ catalytic conversion methods to crack down large hydrocarbon molecules if ever they are formed, cleaning techniques to remove tar and other impurities, up-gradation of product gas to methane for higher calorific value. Based on the information collected, a pilot design of the gasification plant will be proposed for achieving a clean tar free product gas or biogas.

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