Characterization of Biomass as Non Conventional Fuels by Thermal Techniques

摘要: In the last decades problem of CO2 emission in atmosphere has driven industry power generation towards an increasing use biomass fuels addition to conventional fuels. Figure 1 reports well known Van Krevelen diagram for a wide variety solid It can be seen that biomasses are general characterized by larger O/C and H/C ratios compared fossil such as coals. They stand, instead, close RDFs (refuse derived fuels). As matter fact it is not easy draw clear demarcation line between RDFs. Biomass itself broad category materials ranging from raw vegetal refuses industrial civil origin (wood agricultural residues, residues paper, food dairy industry, sludge etc) . A further element despair this already very lies content inorganics and/or metals, which present some at levels distinctively higher than traditional Under respect appear even more wastes. The presence metals inorganic may produce unusual effects terms both energetic environmental performance. been shown process reactor design, particular temperature level inert/oxidizing nature gaseous atmosphere, determine reaction path affects severely fate organic [1-2] but also expected metals. far concerned, upon heating under inert undergoes combination thermal cracking condensation reactions, called pyrolysis, producing gas, liquid (tar) product (char). Gaseous species generally include hydrogen, carbon monoxide, methane, dioxide other incondensable hydrocarbons; tar consists chemicals, methanol, acetone, acetic acid etc. room temperature; char carbonaceous type containing mainly residual matter. Senneca et al. [3] fuel oxygen result two types processes depending on properties conditions (oxygen concentration, rate). At low (if isothermal conditions), or rate non conditions)