ABSTRACT Relevant basic aspects concerned with the study on pyrolysis and gasification of biomass are examined focusing on characterization of chemical and textural-morphological features of virgin and devolatilized samples, kinetics and modeling. Interrelationships between compositional parameters that characterize several types of biomass and various chars are obtained. Two new correlations to predict useful properties of biomass in terms of compositional parameters are also derived in a multivariate fashion. Textural-morphological features as determined by several techniques are analyzed. Special emphasis is given on significant changes occurring during pyrolysis, which are reflected in textural parameters. Progress on determination of surface fractality of biomass and derived chars as a promising tool to overcome complexities involved in describing samples texture is highlighted. Pyrolysis kinetics is analyzed from results obtained for a typical agricultural residue over a wide range of temperatures applying several models reported in the literature. Evaluation of intrinsic kinetic parameters characterizing biomass chars gasification is also illustrated from experimental data and application of gas-solid models.
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